2548 lines
97 KiB
Java
2548 lines
97 KiB
Java
package org.gcube.dataanalysis.executor.rscripts.generic;
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import java.io.BufferedInputStream;
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import java.io.BufferedReader;
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import java.io.ByteArrayInputStream;
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import java.io.CharArrayWriter;
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import java.io.Closeable;
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import java.io.EOFException;
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import java.io.File;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import java.io.OutputStream;
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import java.io.OutputStreamWriter;
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import java.io.PrintWriter;
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import java.io.Reader;
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import java.io.UnsupportedEncodingException;
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import java.io.Writer;
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import java.net.HttpURLConnection;
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import java.net.ServerSocket;
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import java.net.Socket;
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import java.net.URI;
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import java.net.URL;
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import java.net.URLConnection;
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import java.nio.channels.Selector;
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import java.nio.charset.Charset;
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import java.nio.charset.UnsupportedCharsetException;
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import java.util.ArrayList;
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import java.util.Collection;
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import java.util.List;
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import org.apache.commons.codec.Charsets;
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import org.apache.commons.io.LineIterator;
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import org.apache.commons.io.output.ByteArrayOutputStream;
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import org.apache.commons.io.output.StringBuilderWriter;
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/**
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* General IO stream manipulation utilities.
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* <p>
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* This class provides static utility methods for input/output operations.
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* <ul>
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* <li>closeQuietly - these methods close a stream ignoring nulls and exceptions
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* <li>toXxx/read - these methods read data from a stream
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* <li>write - these methods write data to a stream
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* <li>copy - these methods copy all the data from one stream to another
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* <li>contentEquals - these methods compare the content of two streams
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* </ul>
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* <p>
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* The byte-to-char methods and char-to-byte methods involve a conversion step.
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* Two methods are provided in each case, one that uses the platform default
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* encoding and the other which allows you to specify an encoding. You are
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* encouraged to always specify an encoding because relying on the platform
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* default can lead to unexpected results, for example when moving from
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* development to production.
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* <p>
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* All the methods in this class that read a stream are buffered internally.
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* This means that there is no cause to use a <code>BufferedInputStream</code>
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* or <code>BufferedReader</code>. The default buffer size of 4K has been shown
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* to be efficient in tests.
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* <p>
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* Wherever possible, the methods in this class do <em>not</em> flush or close
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* the stream. This is to avoid making non-portable assumptions about the
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* streams' origin and further use. Thus the caller is still responsible for
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* closing streams after use.
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* <p>
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* Origin of code: Excalibur.
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*
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* @version $Id: IOUtils.java 1326636 2012-04-16 14:54:53Z ggregory $
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*/
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public class IOUtils {
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// NOTE: This class is focussed on InputStream, OutputStream, Reader and
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// Writer. Each method should take at least one of these as a parameter,
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// or return one of them.
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private static final int EOF = -1;
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/**
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* The Unix directory separator character.
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*/
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public static final char DIR_SEPARATOR_UNIX = '/';
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/**
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* The Windows directory separator character.
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*/
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public static final char DIR_SEPARATOR_WINDOWS = '\\';
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/**
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* The system directory separator character.
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*/
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public static final char DIR_SEPARATOR = File.separatorChar;
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/**
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* The Unix line separator string.
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*/
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public static final String LINE_SEPARATOR_UNIX = "\n";
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/**
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* The Windows line separator string.
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*/
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public static final String LINE_SEPARATOR_WINDOWS = "\r\n";
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/**
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* The system line separator string.
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*/
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public static final String LINE_SEPARATOR;
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static {
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// avoid security issues
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StringBuilderWriter buf = new StringBuilderWriter(4);
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PrintWriter out = new PrintWriter(buf);
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out.println();
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LINE_SEPARATOR = buf.toString();
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out.close();
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}
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/**
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* The default buffer size ({@value}) to use for
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* {@link #copyLarge(InputStream, OutputStream)}
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* and
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* {@link #copyLarge(Reader, Writer)}
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*/
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private static final int DEFAULT_BUFFER_SIZE = 1024 * 4;
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/**
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* The default buffer size to use for the skip() methods.
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*/
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private static final int SKIP_BUFFER_SIZE = 2048;
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// Allocated in the relevant skip method if necessary.
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/*
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* N.B. no need to synchronize these because:
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* - we don't care if the buffer is created multiple times (the data is ignored)
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* - we always use the same size buffer, so if it it is recreated it will still be OK
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* (if the buffer size were variable, we would need to synch. to ensure some other thread
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* did not create a smaller one)
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*/
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private static char[] SKIP_CHAR_BUFFER;
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private static byte[] SKIP_BYTE_BUFFER;
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/**
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* Instances should NOT be constructed in standard programming.
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*/
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public IOUtils() {
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super();
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}
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//-----------------------------------------------------------------------
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/**
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* Closes a URLConnection.
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*
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* @param conn the connection to close.
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* @since 2.4
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*/
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public static void close(URLConnection conn) {
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if (conn instanceof HttpURLConnection) {
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((HttpURLConnection) conn).disconnect();
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}
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}
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/**
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* Unconditionally close an <code>Reader</code>.
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* <p>
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* Equivalent to {@link Reader#close()}, except any exceptions will be ignored.
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* This is typically used in finally blocks.
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* <p>
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* Example code:
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* <pre>
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* char[] data = new char[1024];
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* Reader in = null;
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* try {
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* in = new FileReader("foo.txt");
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* in.read(data);
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* in.close(); //close errors are handled
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* } catch (Exception e) {
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* // error handling
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* } finally {
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* IOUtils.closeQuietly(in);
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* }
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* </pre>
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*
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* @param input the Reader to close, may be null or already closed
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*/
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public static void closeQuietly(Reader input) {
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closeQuietly((Closeable)input);
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}
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/**
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* Unconditionally close a <code>Writer</code>.
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* <p>
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* Equivalent to {@link Writer#close()}, except any exceptions will be ignored.
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* This is typically used in finally blocks.
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* <p>
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* Example code:
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* <pre>
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* Writer out = null;
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* try {
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* out = new StringWriter();
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* out.write("Hello World");
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* out.close(); //close errors are handled
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* } catch (Exception e) {
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* // error handling
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* } finally {
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* IOUtils.closeQuietly(out);
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* }
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* </pre>
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*
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* @param output the Writer to close, may be null or already closed
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*/
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public static void closeQuietly(Writer output) {
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closeQuietly((Closeable)output);
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}
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/**
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* Unconditionally close an <code>InputStream</code>.
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* <p>
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* Equivalent to {@link InputStream#close()}, except any exceptions will be ignored.
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* This is typically used in finally blocks.
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* <p>
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* Example code:
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* <pre>
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* byte[] data = new byte[1024];
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* InputStream in = null;
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* try {
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* in = new FileInputStream("foo.txt");
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* in.read(data);
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* in.close(); //close errors are handled
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* } catch (Exception e) {
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* // error handling
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* } finally {
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* IOUtils.closeQuietly(in);
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* }
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* </pre>
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*
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* @param input the InputStream to close, may be null or already closed
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*/
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public static void closeQuietly(InputStream input) {
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closeQuietly((Closeable)input);
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}
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/**
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* Unconditionally close an <code>OutputStream</code>.
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* <p>
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* Equivalent to {@link OutputStream#close()}, except any exceptions will be ignored.
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* This is typically used in finally blocks.
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* <p>
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* Example code:
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* <pre>
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* byte[] data = "Hello, World".getBytes();
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*
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* OutputStream out = null;
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* try {
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* out = new FileOutputStream("foo.txt");
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* out.write(data);
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* out.close(); //close errors are handled
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* } catch (IOException e) {
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* // error handling
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* } finally {
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* IOUtils.closeQuietly(out);
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* }
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* </pre>
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*
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* @param output the OutputStream to close, may be null or already closed
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*/
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public static void closeQuietly(OutputStream output) {
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closeQuietly((Closeable)output);
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}
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/**
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* Unconditionally close a <code>Closeable</code>.
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* <p>
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* Equivalent to {@link Closeable#close()}, except any exceptions will be ignored.
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* This is typically used in finally blocks.
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* <p>
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* Example code:
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* <pre>
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* Closeable closeable = null;
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* try {
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* closeable = new FileReader("foo.txt");
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* // process closeable
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* closeable.close();
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* } catch (Exception e) {
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* // error handling
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* } finally {
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* IOUtils.closeQuietly(closeable);
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* }
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* </pre>
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*
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* @param closeable the object to close, may be null or already closed
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* @since 2.0
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*/
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public static void closeQuietly(Closeable closeable) {
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try {
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if (closeable != null) {
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closeable.close();
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}
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} catch (IOException ioe) {
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// ignore
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}
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}
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/**
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* Unconditionally close a <code>Socket</code>.
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* <p>
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* Equivalent to {@link Socket#close()}, except any exceptions will be ignored.
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* This is typically used in finally blocks.
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* <p>
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* Example code:
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* <pre>
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* Socket socket = null;
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* try {
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* socket = new Socket("http://www.foo.com/", 80);
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* // process socket
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* socket.close();
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* } catch (Exception e) {
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* // error handling
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* } finally {
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* IOUtils.closeQuietly(socket);
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* }
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* </pre>
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*
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* @param sock the Socket to close, may be null or already closed
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* @since 2.0
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*/
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public static void closeQuietly(Socket sock){
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if (sock != null){
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try {
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sock.close();
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} catch (IOException ioe) {
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// ignored
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}
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}
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}
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/**
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* Unconditionally close a <code>Selector</code>.
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* <p>
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* Equivalent to {@link Selector#close()}, except any exceptions will be ignored.
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* This is typically used in finally blocks.
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* <p>
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* Example code:
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* <pre>
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* Selector selector = null;
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* try {
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* selector = Selector.open();
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* // process socket
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*
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* } catch (Exception e) {
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* // error handling
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* } finally {
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* IOUtils.closeQuietly(selector);
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* }
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* </pre>
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*
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* @param selector the Selector to close, may be null or already closed
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* @since 2.2
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*/
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public static void closeQuietly(Selector selector){
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if (selector != null){
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try {
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selector.close();
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} catch (IOException ioe) {
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// ignored
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}
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}
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}
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/**
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* Unconditionally close a <code>ServerSocket</code>.
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* <p>
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* Equivalent to {@link ServerSocket#close()}, except any exceptions will be ignored.
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* This is typically used in finally blocks.
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* <p>
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* Example code:
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* <pre>
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* ServerSocket socket = null;
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* try {
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* socket = new ServerSocket();
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* // process socket
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* socket.close();
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* } catch (Exception e) {
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* // error handling
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* } finally {
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* IOUtils.closeQuietly(socket);
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* }
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* </pre>
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*
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* @param sock the ServerSocket to close, may be null or already closed
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* @since 2.2
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*/
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public static void closeQuietly(ServerSocket sock){
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if (sock != null){
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try {
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sock.close();
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} catch (IOException ioe) {
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// ignored
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}
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}
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}
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/**
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* Fetches entire contents of an <code>InputStream</code> and represent
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* same data as result InputStream.
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* <p>
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* This method is useful where,
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* <ul>
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* <li>Source InputStream is slow.</li>
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* <li>It has network resources associated, so we cannot keep it open for
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* long time.</li>
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* <li>It has network timeout associated.</li>
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* </ul>
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* It can be used in favor of {@link #toByteArray(InputStream)}, since it
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* avoids unnecessary allocation and copy of byte[].<br>
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* This method buffers the input internally, so there is no need to use a
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* <code>BufferedInputStream</code>.
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*
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* @param input Stream to be fully buffered.
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* @return A fully buffered stream.
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* @throws IOException if an I/O error occurs
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* @since 2.0
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*/
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public static InputStream toBufferedInputStream(InputStream input) throws IOException {
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return ByteArrayOutputStream.toBufferedInputStream(input);
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}
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/**
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* Returns the given reader if it is a {@link BufferedReader}, otherwise creates a toBufferedReader for the given
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* reader.
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*
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* @param reader
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* the reader to wrap or return
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* @return the given reader or a new {@link BufferedReader} for the given reader
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* @since 2.2
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*/
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public static BufferedReader toBufferedReader(Reader reader) {
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return reader instanceof BufferedReader ? (BufferedReader) reader : new BufferedReader(reader);
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}
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// read toByteArray
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//-----------------------------------------------------------------------
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/**
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* Get the contents of an <code>InputStream</code> as a <code>byte[]</code>.
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* <p>
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* This method buffers the input internally, so there is no need to use a
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* <code>BufferedInputStream</code>.
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*
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* @param input the <code>InputStream</code> to read from
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* @return the requested byte array
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* @throws NullPointerException if the input is null
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* @throws IOException if an I/O error occurs
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*/
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public static byte[] toByteArray(InputStream input) throws IOException {
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ByteArrayOutputStream output = new ByteArrayOutputStream();
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copy(input, output);
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return output.toByteArray();
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}
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/**
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* Get contents of an <code>InputStream</code> as a <code>byte[]</code>.
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* Use this method instead of <code>toByteArray(InputStream)</code>
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* when <code>InputStream</code> size is known.
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* <b>NOTE:</b> the method checks that the length can safely be cast to an int without truncation
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* before using {@link IOUtils#toByteArray(java.io.InputStream, int)} to read into the byte array.
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* (Arrays can have no more than Integer.MAX_VALUE entries anyway)
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*
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* @param input the <code>InputStream</code> to read from
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* @param size the size of <code>InputStream</code>
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* @return the requested byte array
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* @throws IOException if an I/O error occurs or <code>InputStream</code> size differ from parameter size
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* @throws IllegalArgumentException if size is less than zero or size is greater than Integer.MAX_VALUE
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* @see IOUtils#toByteArray(java.io.InputStream, int)
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* @since 2.1
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*/
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public static byte[] toByteArray(InputStream input, long size) throws IOException {
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if(size > Integer.MAX_VALUE) {
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throw new IllegalArgumentException("Size cannot be greater than Integer max value: " + size);
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}
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return toByteArray(input, (int) size);
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}
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|
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/**
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* Get the contents of an <code>InputStream</code> as a <code>byte[]</code>.
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* Use this method instead of <code>toByteArray(InputStream)</code>
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* when <code>InputStream</code> size is known
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* @param input the <code>InputStream</code> to read from
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* @param size the size of <code>InputStream</code>
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* @return the requested byte array
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* @throws IOException if an I/O error occurs or <code>InputStream</code> size differ from parameter size
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* @throws IllegalArgumentException if size is less than zero
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* @since 2.1
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*/
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public static byte[] toByteArray(InputStream input, int size) throws IOException {
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if (size < 0) {
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throw new IllegalArgumentException("Size must be equal or greater than zero: " + size);
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}
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if (size == 0) {
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return new byte[0];
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}
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byte[] data = new byte[size];
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int offset = 0;
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int readed;
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while (offset < size && (readed = input.read(data, offset, size - offset)) != EOF) {
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offset += readed;
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}
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if (offset != size) {
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throw new IOException("Unexpected readed size. current: " + offset + ", excepted: " + size);
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}
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return data;
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}
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|
|
/**
|
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* Get the contents of a <code>Reader</code> as a <code>byte[]</code>
|
|
* using the default character encoding of the platform.
|
|
* <p>
|
|
* This method buffers the input internally, so there is no need to use a
|
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* <code>BufferedReader</code>.
|
|
*
|
|
* @param input the <code>Reader</code> to read from
|
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* @return the requested byte array
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* @throws NullPointerException if the input is null
|
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* @throws IOException if an I/O error occurs
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*/
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public static byte[] toByteArray(Reader input) throws IOException {
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return toByteArray(input, Charset.defaultCharset());
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}
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|
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/**
|
|
* Get the contents of a <code>Reader</code> as a <code>byte[]</code>
|
|
* using the specified character encoding.
|
|
* <p>
|
|
* This method buffers the input internally, so there is no need to use a
|
|
* <code>BufferedReader</code>.
|
|
*
|
|
* @param input the <code>Reader</code> to read from
|
|
* @param encoding the encoding to use, null means platform default
|
|
* @return the requested byte array
|
|
* @throws NullPointerException if the input is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since 2.3
|
|
*/
|
|
public static byte[] toByteArray(Reader input, Charset encoding) throws IOException {
|
|
ByteArrayOutputStream output = new ByteArrayOutputStream();
|
|
copy(input, output, encoding);
|
|
return output.toByteArray();
|
|
}
|
|
|
|
/**
|
|
* Get the contents of a <code>Reader</code> as a <code>byte[]</code>
|
|
* using the specified character encoding.
|
|
* <p>
|
|
* Character encoding names can be found at
|
|
* <a href="http://www.iana.org/assignments/character-sets">IANA</a>.
|
|
* <p>
|
|
* This method buffers the input internally, so there is no need to use a
|
|
* <code>BufferedReader</code>.
|
|
*
|
|
* @param input the <code>Reader</code> to read from
|
|
* @param encoding the encoding to use, null means platform default
|
|
* @return the requested byte array
|
|
* @throws NullPointerException if the input is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @throws UnsupportedCharsetException
|
|
* thrown instead of {@link UnsupportedEncodingException} in version 2.2 if the encoding is not
|
|
* supported.
|
|
* @since 1.1
|
|
*/
|
|
public static byte[] toByteArray(Reader input, String encoding) throws IOException {
|
|
return toByteArray(input, Charsets.toCharset(encoding));
|
|
}
|
|
|
|
/**
|
|
* Get the contents of a <code>String</code> as a <code>byte[]</code>
|
|
* using the default character encoding of the platform.
|
|
* <p>
|
|
* This is the same as {@link String#getBytes()}.
|
|
*
|
|
* @param input the <code>String</code> to convert
|
|
* @return the requested byte array
|
|
* @throws NullPointerException if the input is null
|
|
* @throws IOException if an I/O error occurs (never occurs)
|
|
* @deprecated Use {@link String#getBytes()}
|
|
*/
|
|
@Deprecated
|
|
public static byte[] toByteArray(String input) throws IOException {
|
|
return input.getBytes();
|
|
}
|
|
|
|
/**
|
|
* Get the contents of a <code>URI</code> as a <code>byte[]</code>.
|
|
*
|
|
* @param uri
|
|
* the <code>URI</code> to read
|
|
* @return the requested byte array
|
|
* @throws NullPointerException
|
|
* if the uri is null
|
|
* @throws IOException
|
|
* if an I/O exception occurs
|
|
* @since 2.4
|
|
*/
|
|
public static byte[] toByteArray(URI uri) throws IOException {
|
|
return IOUtils.toByteArray(uri.toURL());
|
|
}
|
|
|
|
/**
|
|
* Get the contents of a <code>URL</code> as a <code>byte[]</code>.
|
|
*
|
|
* @param url
|
|
* the <code>URL</code> to read
|
|
* @return the requested byte array
|
|
* @throws NullPointerException
|
|
* if the input is null
|
|
* @throws IOException
|
|
* if an I/O exception occurs
|
|
* @since 2.4
|
|
*/
|
|
public static byte[] toByteArray(URL url) throws IOException {
|
|
URLConnection conn = url.openConnection();
|
|
try {
|
|
return IOUtils.toByteArray(conn);
|
|
} finally {
|
|
close(conn);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Get the contents of a <code>URLConnection</code> as a <code>byte[]</code>.
|
|
*
|
|
* @param urlConn
|
|
* the <code>URLConnection</code> to read
|
|
* @return the requested byte array
|
|
* @throws NullPointerException
|
|
* if the urlConn is null
|
|
* @throws IOException
|
|
* if an I/O exception occurs
|
|
* @since 2.4
|
|
*/
|
|
public static byte[] toByteArray(URLConnection urlConn) throws IOException {
|
|
InputStream inputStream = urlConn.getInputStream();
|
|
try {
|
|
return IOUtils.toByteArray(inputStream);
|
|
} finally {
|
|
inputStream.close();
|
|
}
|
|
}
|
|
|
|
// read char[]
|
|
//-----------------------------------------------------------------------
|
|
/**
|
|
* Get the contents of an <code>InputStream</code> as a character array
|
|
* using the default character encoding of the platform.
|
|
* <p>
|
|
* This method buffers the input internally, so there is no need to use a
|
|
* <code>BufferedInputStream</code>.
|
|
*
|
|
* @param is the <code>InputStream</code> to read from
|
|
* @return the requested character array
|
|
* @throws NullPointerException if the input is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since 1.1
|
|
*/
|
|
public static char[] toCharArray(InputStream is) throws IOException {
|
|
return toCharArray(is, Charset.defaultCharset());
|
|
}
|
|
|
|
/**
|
|
* Get the contents of an <code>InputStream</code> as a character array
|
|
* using the specified character encoding.
|
|
* <p>
|
|
* This method buffers the input internally, so there is no need to use a
|
|
* <code>BufferedInputStream</code>.
|
|
*
|
|
* @param is the <code>InputStream</code> to read from
|
|
* @param encoding the encoding to use, null means platform default
|
|
* @return the requested character array
|
|
* @throws NullPointerException if the input is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since 2.3
|
|
*/
|
|
public static char[] toCharArray(InputStream is, Charset encoding)
|
|
throws IOException {
|
|
CharArrayWriter output = new CharArrayWriter();
|
|
copy(is, output, encoding);
|
|
return output.toCharArray();
|
|
}
|
|
|
|
/**
|
|
* Get the contents of an <code>InputStream</code> as a character array
|
|
* using the specified character encoding.
|
|
* <p>
|
|
* Character encoding names can be found at
|
|
* <a href="http://www.iana.org/assignments/character-sets">IANA</a>.
|
|
* <p>
|
|
* This method buffers the input internally, so there is no need to use a
|
|
* <code>BufferedInputStream</code>.
|
|
*
|
|
* @param is the <code>InputStream</code> to read from
|
|
* @param encoding the encoding to use, null means platform default
|
|
* @return the requested character array
|
|
* @throws NullPointerException if the input is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @throws UnsupportedCharsetException
|
|
* thrown instead of {@link UnsupportedEncodingException} in version 2.2 if the encoding is not
|
|
* supported.
|
|
* @since 1.1
|
|
*/
|
|
public static char[] toCharArray(InputStream is, String encoding) throws IOException {
|
|
return toCharArray(is, Charsets.toCharset(encoding));
|
|
}
|
|
|
|
/**
|
|
* Get the contents of a <code>Reader</code> as a character array.
|
|
* <p>
|
|
* This method buffers the input internally, so there is no need to use a
|
|
* <code>BufferedReader</code>.
|
|
*
|
|
* @param input the <code>Reader</code> to read from
|
|
* @return the requested character array
|
|
* @throws NullPointerException if the input is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since 1.1
|
|
*/
|
|
public static char[] toCharArray(Reader input) throws IOException {
|
|
CharArrayWriter sw = new CharArrayWriter();
|
|
copy(input, sw);
|
|
return sw.toCharArray();
|
|
}
|
|
|
|
// read toString
|
|
//-----------------------------------------------------------------------
|
|
/**
|
|
* Get the contents of an <code>InputStream</code> as a String
|
|
* using the default character encoding of the platform.
|
|
* <p>
|
|
* This method buffers the input internally, so there is no need to use a
|
|
* <code>BufferedInputStream</code>.
|
|
*
|
|
* @param input the <code>InputStream</code> to read from
|
|
* @return the requested String
|
|
* @throws NullPointerException if the input is null
|
|
* @throws IOException if an I/O error occurs
|
|
*/
|
|
public static String toString(InputStream input) throws IOException {
|
|
return toString(input, Charset.defaultCharset());
|
|
}
|
|
|
|
/**
|
|
* Get the contents of an <code>InputStream</code> as a String
|
|
* using the specified character encoding.
|
|
* <p>
|
|
* This method buffers the input internally, so there is no need to use a
|
|
* <code>BufferedInputStream</code>.
|
|
* </p>
|
|
* @param input the <code>InputStream</code> to read from
|
|
* @param encoding the encoding to use, null means platform default
|
|
* @return the requested String
|
|
* @throws NullPointerException if the input is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since 2.3
|
|
*/
|
|
public static String toString(InputStream input, Charset encoding) throws IOException {
|
|
StringBuilderWriter sw = new StringBuilderWriter();
|
|
copy(input, sw, encoding);
|
|
return sw.toString();
|
|
}
|
|
|
|
/**
|
|
* Get the contents of an <code>InputStream</code> as a String
|
|
* using the specified character encoding.
|
|
* <p>
|
|
* Character encoding names can be found at
|
|
* <a href="http://www.iana.org/assignments/character-sets">IANA</a>.
|
|
* <p>
|
|
* This method buffers the input internally, so there is no need to use a
|
|
* <code>BufferedInputStream</code>.
|
|
*
|
|
* @param input the <code>InputStream</code> to read from
|
|
* @param encoding the encoding to use, null means platform default
|
|
* @return the requested String
|
|
* @throws NullPointerException if the input is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @throws UnsupportedCharsetException
|
|
* thrown instead of {@link UnsupportedEncodingException} in version 2.2 if the encoding is not
|
|
* supported.
|
|
*/
|
|
public static String toString(InputStream input, String encoding)
|
|
throws IOException {
|
|
return toString(input, Charsets.toCharset(encoding));
|
|
}
|
|
|
|
/**
|
|
* Get the contents of a <code>Reader</code> as a String.
|
|
* <p>
|
|
* This method buffers the input internally, so there is no need to use a
|
|
* <code>BufferedReader</code>.
|
|
*
|
|
* @param input the <code>Reader</code> to read from
|
|
* @return the requested String
|
|
* @throws NullPointerException if the input is null
|
|
* @throws IOException if an I/O error occurs
|
|
*/
|
|
public static String toString(Reader input) throws IOException {
|
|
StringBuilderWriter sw = new StringBuilderWriter();
|
|
copy(input, sw);
|
|
return sw.toString();
|
|
}
|
|
|
|
/**
|
|
* Gets the contents at the given URI.
|
|
*
|
|
* @param uri
|
|
* The URI source.
|
|
* @return The contents of the URL as a String.
|
|
* @throws IOException if an I/O exception occurs.
|
|
* @since 2.1
|
|
*/
|
|
public static String toString(URI uri) throws IOException {
|
|
return toString(uri, Charset.defaultCharset());
|
|
}
|
|
|
|
/**
|
|
* Gets the contents at the given URI.
|
|
*
|
|
* @param uri
|
|
* The URI source.
|
|
* @param encoding
|
|
* The encoding name for the URL contents.
|
|
* @return The contents of the URL as a String.
|
|
* @throws IOException if an I/O exception occurs.
|
|
* @since 2.3.
|
|
*/
|
|
public static String toString(URI uri, Charset encoding) throws IOException {
|
|
return toString(uri.toURL(), Charsets.toCharset(encoding));
|
|
}
|
|
|
|
/**
|
|
* Gets the contents at the given URI.
|
|
*
|
|
* @param uri
|
|
* The URI source.
|
|
* @param encoding
|
|
* The encoding name for the URL contents.
|
|
* @return The contents of the URL as a String.
|
|
* @throws IOException if an I/O exception occurs.
|
|
* @throws UnsupportedCharsetException
|
|
* thrown instead of {@link UnsupportedEncodingException} in version 2.2 if the encoding is not
|
|
* supported.
|
|
* @since 2.1
|
|
*/
|
|
public static String toString(URI uri, String encoding) throws IOException {
|
|
return toString(uri, Charsets.toCharset(encoding));
|
|
}
|
|
|
|
/**
|
|
* Gets the contents at the given URL.
|
|
*
|
|
* @param url
|
|
* The URL source.
|
|
* @return The contents of the URL as a String.
|
|
* @throws IOException if an I/O exception occurs.
|
|
* @since 2.1
|
|
*/
|
|
public static String toString(URL url) throws IOException {
|
|
return toString(url, Charset.defaultCharset());
|
|
}
|
|
|
|
/**
|
|
* Gets the contents at the given URL.
|
|
*
|
|
* @param url
|
|
* The URL source.
|
|
* @param encoding
|
|
* The encoding name for the URL contents.
|
|
* @return The contents of the URL as a String.
|
|
* @throws IOException if an I/O exception occurs.
|
|
* @since 2.3
|
|
*/
|
|
public static String toString(URL url, Charset encoding) throws IOException {
|
|
InputStream inputStream = url.openStream();
|
|
try {
|
|
return toString(inputStream, encoding);
|
|
} finally {
|
|
inputStream.close();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Gets the contents at the given URL.
|
|
*
|
|
* @param url
|
|
* The URL source.
|
|
* @param encoding
|
|
* The encoding name for the URL contents.
|
|
* @return The contents of the URL as a String.
|
|
* @throws IOException if an I/O exception occurs.
|
|
* @throws UnsupportedCharsetException
|
|
* thrown instead of {@link UnsupportedEncodingException} in version 2.2 if the encoding is not
|
|
* supported.
|
|
* @since 2.1
|
|
*/
|
|
public static String toString(URL url, String encoding) throws IOException {
|
|
return toString(url, Charsets.toCharset(encoding));
|
|
}
|
|
|
|
/**
|
|
* Get the contents of a <code>byte[]</code> as a String
|
|
* using the default character encoding of the platform.
|
|
*
|
|
* @param input the byte array to read from
|
|
* @return the requested String
|
|
* @throws NullPointerException if the input is null
|
|
* @throws IOException if an I/O error occurs (never occurs)
|
|
* @deprecated Use {@link String#String(byte[])}
|
|
*/
|
|
@Deprecated
|
|
public static String toString(byte[] input) throws IOException {
|
|
return new String(input);
|
|
}
|
|
|
|
/**
|
|
* Get the contents of a <code>byte[]</code> as a String
|
|
* using the specified character encoding.
|
|
* <p>
|
|
* Character encoding names can be found at
|
|
* <a href="http://www.iana.org/assignments/character-sets">IANA</a>.
|
|
*
|
|
* @param input the byte array to read from
|
|
* @param encoding the encoding to use, null means platform default
|
|
* @return the requested String
|
|
* @throws NullPointerException if the input is null
|
|
* @throws IOException if an I/O error occurs (never occurs)
|
|
*/
|
|
public static String toString(byte[] input, String encoding) throws IOException {
|
|
return new String(input, Charsets.toCharset(encoding));
|
|
}
|
|
|
|
// readLines
|
|
//-----------------------------------------------------------------------
|
|
/**
|
|
* Get the contents of an <code>InputStream</code> as a list of Strings,
|
|
* one entry per line, using the default character encoding of the platform.
|
|
* <p>
|
|
* This method buffers the input internally, so there is no need to use a
|
|
* <code>BufferedInputStream</code>.
|
|
*
|
|
* @param input the <code>InputStream</code> to read from, not null
|
|
* @return the list of Strings, never null
|
|
* @throws NullPointerException if the input is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since 1.1
|
|
*/
|
|
public static List<String> readLines(InputStream input) throws IOException {
|
|
return readLines(input, Charset.defaultCharset());
|
|
}
|
|
|
|
/**
|
|
* Get the contents of an <code>InputStream</code> as a list of Strings,
|
|
* one entry per line, using the specified character encoding.
|
|
* <p>
|
|
* This method buffers the input internally, so there is no need to use a
|
|
* <code>BufferedInputStream</code>.
|
|
*
|
|
* @param input the <code>InputStream</code> to read from, not null
|
|
* @param encoding the encoding to use, null means platform default
|
|
* @return the list of Strings, never null
|
|
* @throws NullPointerException if the input is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since 2.3
|
|
*/
|
|
public static List<String> readLines(InputStream input, Charset encoding) throws IOException {
|
|
InputStreamReader reader = new InputStreamReader(input, Charsets.toCharset(encoding));
|
|
return readLines(reader);
|
|
}
|
|
|
|
/**
|
|
* Get the contents of an <code>InputStream</code> as a list of Strings,
|
|
* one entry per line, using the specified character encoding.
|
|
* <p>
|
|
* Character encoding names can be found at
|
|
* <a href="http://www.iana.org/assignments/character-sets">IANA</a>.
|
|
* <p>
|
|
* This method buffers the input internally, so there is no need to use a
|
|
* <code>BufferedInputStream</code>.
|
|
*
|
|
* @param input the <code>InputStream</code> to read from, not null
|
|
* @param encoding the encoding to use, null means platform default
|
|
* @return the list of Strings, never null
|
|
* @throws NullPointerException if the input is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @throws UnsupportedCharsetException
|
|
* thrown instead of {@link UnsupportedEncodingException} in version 2.2 if the encoding is not
|
|
* supported.
|
|
* @since 1.1
|
|
*/
|
|
public static List<String> readLines(InputStream input, String encoding) throws IOException {
|
|
return readLines(input, Charsets.toCharset(encoding));
|
|
}
|
|
|
|
/**
|
|
* Get the contents of a <code>Reader</code> as a list of Strings,
|
|
* one entry per line.
|
|
* <p>
|
|
* This method buffers the input internally, so there is no need to use a
|
|
* <code>BufferedReader</code>.
|
|
*
|
|
* @param input the <code>Reader</code> to read from, not null
|
|
* @return the list of Strings, never null
|
|
* @throws NullPointerException if the input is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since 1.1
|
|
*/
|
|
public static List<String> readLines(Reader input) throws IOException {
|
|
BufferedReader reader = toBufferedReader(input);
|
|
List<String> list = new ArrayList<String>();
|
|
String line = reader.readLine();
|
|
while (line != null) {
|
|
list.add(line);
|
|
line = reader.readLine();
|
|
}
|
|
return list;
|
|
}
|
|
|
|
// lineIterator
|
|
//-----------------------------------------------------------------------
|
|
/**
|
|
* Return an Iterator for the lines in a <code>Reader</code>.
|
|
* <p>
|
|
* <code>LineIterator</code> holds a reference to the open
|
|
* <code>Reader</code> specified here. When you have finished with the
|
|
* iterator you should close the reader to free internal resources.
|
|
* This can be done by closing the reader directly, or by calling
|
|
* {@link LineIterator#close()} or {@link LineIterator#closeQuietly(LineIterator)}.
|
|
* <p>
|
|
* The recommended usage pattern is:
|
|
* <pre>
|
|
* try {
|
|
* LineIterator it = IOUtils.lineIterator(reader);
|
|
* while (it.hasNext()) {
|
|
* String line = it.nextLine();
|
|
* /// do something with line
|
|
* }
|
|
* } finally {
|
|
* IOUtils.closeQuietly(reader);
|
|
* }
|
|
* </pre>
|
|
*
|
|
* @param reader the <code>Reader</code> to read from, not null
|
|
* @return an Iterator of the lines in the reader, never null
|
|
* @throws IllegalArgumentException if the reader is null
|
|
* @since 1.2
|
|
*/
|
|
public static LineIterator lineIterator(Reader reader) {
|
|
return new LineIterator(reader);
|
|
}
|
|
|
|
/**
|
|
* Return an Iterator for the lines in an <code>InputStream</code>, using
|
|
* the character encoding specified (or default encoding if null).
|
|
* <p>
|
|
* <code>LineIterator</code> holds a reference to the open
|
|
* <code>InputStream</code> specified here. When you have finished with
|
|
* the iterator you should close the stream to free internal resources.
|
|
* This can be done by closing the stream directly, or by calling
|
|
* {@link LineIterator#close()} or {@link LineIterator#closeQuietly(LineIterator)}.
|
|
* <p>
|
|
* The recommended usage pattern is:
|
|
* <pre>
|
|
* try {
|
|
* LineIterator it = IOUtils.lineIterator(stream, charset);
|
|
* while (it.hasNext()) {
|
|
* String line = it.nextLine();
|
|
* /// do something with line
|
|
* }
|
|
* } finally {
|
|
* IOUtils.closeQuietly(stream);
|
|
* }
|
|
* </pre>
|
|
*
|
|
* @param input the <code>InputStream</code> to read from, not null
|
|
* @param encoding the encoding to use, null means platform default
|
|
* @return an Iterator of the lines in the reader, never null
|
|
* @throws IllegalArgumentException if the input is null
|
|
* @throws IOException if an I/O error occurs, such as if the encoding is invalid
|
|
* @since 2.3
|
|
*/
|
|
public static LineIterator lineIterator(InputStream input, Charset encoding) throws IOException {
|
|
return new LineIterator(new InputStreamReader(input, Charsets.toCharset(encoding)));
|
|
}
|
|
|
|
/**
|
|
* Return an Iterator for the lines in an <code>InputStream</code>, using
|
|
* the character encoding specified (or default encoding if null).
|
|
* <p>
|
|
* <code>LineIterator</code> holds a reference to the open
|
|
* <code>InputStream</code> specified here. When you have finished with
|
|
* the iterator you should close the stream to free internal resources.
|
|
* This can be done by closing the stream directly, or by calling
|
|
* {@link LineIterator#close()} or {@link LineIterator#closeQuietly(LineIterator)}.
|
|
* <p>
|
|
* The recommended usage pattern is:
|
|
* <pre>
|
|
* try {
|
|
* LineIterator it = IOUtils.lineIterator(stream, "UTF-8");
|
|
* while (it.hasNext()) {
|
|
* String line = it.nextLine();
|
|
* /// do something with line
|
|
* }
|
|
* } finally {
|
|
* IOUtils.closeQuietly(stream);
|
|
* }
|
|
* </pre>
|
|
*
|
|
* @param input the <code>InputStream</code> to read from, not null
|
|
* @param encoding the encoding to use, null means platform default
|
|
* @return an Iterator of the lines in the reader, never null
|
|
* @throws IllegalArgumentException if the input is null
|
|
* @throws IOException if an I/O error occurs, such as if the encoding is invalid
|
|
* @throws UnsupportedCharsetException
|
|
* thrown instead of {@link UnsupportedEncodingException} in version 2.2 if the encoding is not
|
|
* supported.
|
|
* @since 1.2
|
|
*/
|
|
public static LineIterator lineIterator(InputStream input, String encoding) throws IOException {
|
|
return lineIterator(input, Charsets.toCharset(encoding));
|
|
}
|
|
|
|
//-----------------------------------------------------------------------
|
|
/**
|
|
* Convert the specified CharSequence to an input stream, encoded as bytes
|
|
* using the default character encoding of the platform.
|
|
*
|
|
* @param input the CharSequence to convert
|
|
* @return an input stream
|
|
* @since 2.0
|
|
*/
|
|
public static InputStream toInputStream(CharSequence input) {
|
|
return toInputStream(input, Charset.defaultCharset());
|
|
}
|
|
|
|
/**
|
|
* Convert the specified CharSequence to an input stream, encoded as bytes
|
|
* using the specified character encoding.
|
|
*
|
|
* @param input the CharSequence to convert
|
|
* @param encoding the encoding to use, null means platform default
|
|
* @return an input stream
|
|
* @since 2.3
|
|
*/
|
|
public static InputStream toInputStream(CharSequence input, Charset encoding) {
|
|
return toInputStream(input.toString(), encoding);
|
|
}
|
|
|
|
/**
|
|
* Convert the specified CharSequence to an input stream, encoded as bytes
|
|
* using the specified character encoding.
|
|
* <p>
|
|
* Character encoding names can be found at
|
|
* <a href="http://www.iana.org/assignments/character-sets">IANA</a>.
|
|
*
|
|
* @param input the CharSequence to convert
|
|
* @param encoding the encoding to use, null means platform default
|
|
* @return an input stream
|
|
* @throws IOException if the encoding is invalid
|
|
* @throws UnsupportedCharsetException
|
|
* thrown instead of {@link UnsupportedEncodingException} in version 2.2 if the encoding is not
|
|
* supported.
|
|
* @since 2.0
|
|
*/
|
|
public static InputStream toInputStream(CharSequence input, String encoding) throws IOException {
|
|
return toInputStream(input, Charsets.toCharset(encoding));
|
|
}
|
|
|
|
//-----------------------------------------------------------------------
|
|
/**
|
|
* Convert the specified string to an input stream, encoded as bytes
|
|
* using the default character encoding of the platform.
|
|
*
|
|
* @param input the string to convert
|
|
* @return an input stream
|
|
* @since 1.1
|
|
*/
|
|
public static InputStream toInputStream(String input) {
|
|
return toInputStream(input, Charset.defaultCharset());
|
|
}
|
|
|
|
/**
|
|
* Convert the specified string to an input stream, encoded as bytes
|
|
* using the specified character encoding.
|
|
*
|
|
* @param input the string to convert
|
|
* @param encoding the encoding to use, null means platform default
|
|
* @return an input stream
|
|
* @since 2.3
|
|
*/
|
|
public static InputStream toInputStream(String input, Charset encoding) {
|
|
return new ByteArrayInputStream(input.getBytes(Charsets.toCharset(encoding)));
|
|
}
|
|
|
|
/**
|
|
* Convert the specified string to an input stream, encoded as bytes
|
|
* using the specified character encoding.
|
|
* <p>
|
|
* Character encoding names can be found at
|
|
* <a href="http://www.iana.org/assignments/character-sets">IANA</a>.
|
|
*
|
|
* @param input the string to convert
|
|
* @param encoding the encoding to use, null means platform default
|
|
* @return an input stream
|
|
* @throws IOException if the encoding is invalid
|
|
* @throws UnsupportedCharsetException
|
|
* thrown instead of {@link UnsupportedEncodingException} in version 2.2 if the encoding is not
|
|
* supported.
|
|
* @since 1.1
|
|
*/
|
|
public static InputStream toInputStream(String input, String encoding) throws IOException {
|
|
byte[] bytes = input.getBytes(Charsets.toCharset(encoding));
|
|
return new ByteArrayInputStream(bytes);
|
|
}
|
|
|
|
// write byte[]
|
|
//-----------------------------------------------------------------------
|
|
/**
|
|
* Writes bytes from a <code>byte[]</code> to an <code>OutputStream</code>.
|
|
*
|
|
* @param data the byte array to write, do not modify during output,
|
|
* null ignored
|
|
* @param output the <code>OutputStream</code> to write to
|
|
* @throws NullPointerException if output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since 1.1
|
|
*/
|
|
public static void write(byte[] data, OutputStream output)
|
|
throws IOException {
|
|
if (data != null) {
|
|
output.write(data);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Writes bytes from a <code>byte[]</code> to chars on a <code>Writer</code>
|
|
* using the default character encoding of the platform.
|
|
* <p>
|
|
* This method uses {@link String#String(byte[])}.
|
|
*
|
|
* @param data the byte array to write, do not modify during output,
|
|
* null ignored
|
|
* @param output the <code>Writer</code> to write to
|
|
* @throws NullPointerException if output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since 1.1
|
|
*/
|
|
public static void write(byte[] data, Writer output) throws IOException {
|
|
write(data, output, Charset.defaultCharset());
|
|
}
|
|
|
|
/**
|
|
* Writes bytes from a <code>byte[]</code> to chars on a <code>Writer</code>
|
|
* using the specified character encoding.
|
|
* <p>
|
|
* This method uses {@link String#String(byte[], String)}.
|
|
*
|
|
* @param data the byte array to write, do not modify during output,
|
|
* null ignored
|
|
* @param output the <code>Writer</code> to write to
|
|
* @param encoding the encoding to use, null means platform default
|
|
* @throws NullPointerException if output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since 2.3
|
|
*/
|
|
public static void write(byte[] data, Writer output, Charset encoding) throws IOException {
|
|
if (data != null) {
|
|
output.write(new String(data, Charsets.toCharset(encoding)));
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Writes bytes from a <code>byte[]</code> to chars on a <code>Writer</code>
|
|
* using the specified character encoding.
|
|
* <p>
|
|
* Character encoding names can be found at
|
|
* <a href="http://www.iana.org/assignments/character-sets">IANA</a>.
|
|
* <p>
|
|
* This method uses {@link String#String(byte[], String)}.
|
|
*
|
|
* @param data the byte array to write, do not modify during output,
|
|
* null ignored
|
|
* @param output the <code>Writer</code> to write to
|
|
* @param encoding the encoding to use, null means platform default
|
|
* @throws NullPointerException if output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @throws UnsupportedCharsetException
|
|
* thrown instead of {@link UnsupportedEncodingException} in version 2.2 if the encoding is not
|
|
* supported.
|
|
* @since 1.1
|
|
*/
|
|
public static void write(byte[] data, Writer output, String encoding) throws IOException {
|
|
write(data, output, Charsets.toCharset(encoding));
|
|
}
|
|
|
|
// write char[]
|
|
//-----------------------------------------------------------------------
|
|
/**
|
|
* Writes chars from a <code>char[]</code> to a <code>Writer</code>
|
|
* using the default character encoding of the platform.
|
|
*
|
|
* @param data the char array to write, do not modify during output,
|
|
* null ignored
|
|
* @param output the <code>Writer</code> to write to
|
|
* @throws NullPointerException if output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since 1.1
|
|
*/
|
|
public static void write(char[] data, Writer output) throws IOException {
|
|
if (data != null) {
|
|
output.write(data);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Writes chars from a <code>char[]</code> to bytes on an
|
|
* <code>OutputStream</code>.
|
|
* <p>
|
|
* This method uses {@link String#String(char[])} and
|
|
* {@link String#getBytes()}.
|
|
*
|
|
* @param data the char array to write, do not modify during output,
|
|
* null ignored
|
|
* @param output the <code>OutputStream</code> to write to
|
|
* @throws NullPointerException if output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since 1.1
|
|
*/
|
|
public static void write(char[] data, OutputStream output)
|
|
throws IOException {
|
|
write(data, output, Charset.defaultCharset());
|
|
}
|
|
|
|
/**
|
|
* Writes chars from a <code>char[]</code> to bytes on an
|
|
* <code>OutputStream</code> using the specified character encoding.
|
|
* <p>
|
|
* This method uses {@link String#String(char[])} and
|
|
* {@link String#getBytes(String)}.
|
|
*
|
|
* @param data the char array to write, do not modify during output,
|
|
* null ignored
|
|
* @param output the <code>OutputStream</code> to write to
|
|
* @param encoding the encoding to use, null means platform default
|
|
* @throws NullPointerException if output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since 2.3
|
|
*/
|
|
public static void write(char[] data, OutputStream output, Charset encoding) throws IOException {
|
|
if (data != null) {
|
|
output.write(new String(data).getBytes(Charsets.toCharset(encoding)));
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Writes chars from a <code>char[]</code> to bytes on an
|
|
* <code>OutputStream</code> using the specified character encoding.
|
|
* <p>
|
|
* Character encoding names can be found at
|
|
* <a href="http://www.iana.org/assignments/character-sets">IANA</a>.
|
|
* <p>
|
|
* This method uses {@link String#String(char[])} and
|
|
* {@link String#getBytes(String)}.
|
|
*
|
|
* @param data the char array to write, do not modify during output,
|
|
* null ignored
|
|
* @param output the <code>OutputStream</code> to write to
|
|
* @param encoding the encoding to use, null means platform default
|
|
* @throws NullPointerException if output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @throws UnsupportedCharsetException
|
|
* thrown instead of {@link UnsupportedEncodingException} in version 2.2 if the encoding is not
|
|
* supported.
|
|
* @since 1.1
|
|
*/
|
|
public static void write(char[] data, OutputStream output, String encoding)
|
|
throws IOException {
|
|
write(data, output, Charsets.toCharset(encoding));
|
|
}
|
|
|
|
// write CharSequence
|
|
//-----------------------------------------------------------------------
|
|
/**
|
|
* Writes chars from a <code>CharSequence</code> to a <code>Writer</code>.
|
|
*
|
|
* @param data the <code>CharSequence</code> to write, null ignored
|
|
* @param output the <code>Writer</code> to write to
|
|
* @throws NullPointerException if output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since 2.0
|
|
*/
|
|
public static void write(CharSequence data, Writer output) throws IOException {
|
|
if (data != null) {
|
|
write(data.toString(), output);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Writes chars from a <code>CharSequence</code> to bytes on an
|
|
* <code>OutputStream</code> using the default character encoding of the
|
|
* platform.
|
|
* <p>
|
|
* This method uses {@link String#getBytes()}.
|
|
*
|
|
* @param data the <code>CharSequence</code> to write, null ignored
|
|
* @param output the <code>OutputStream</code> to write to
|
|
* @throws NullPointerException if output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since 2.0
|
|
*/
|
|
public static void write(CharSequence data, OutputStream output)
|
|
throws IOException {
|
|
write(data, output, Charset.defaultCharset());
|
|
}
|
|
|
|
/**
|
|
* Writes chars from a <code>CharSequence</code> to bytes on an
|
|
* <code>OutputStream</code> using the specified character encoding.
|
|
* <p>
|
|
* This method uses {@link String#getBytes(String)}.
|
|
*
|
|
* @param data the <code>CharSequence</code> to write, null ignored
|
|
* @param output the <code>OutputStream</code> to write to
|
|
* @param encoding the encoding to use, null means platform default
|
|
* @throws NullPointerException if output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since 2.3
|
|
*/
|
|
public static void write(CharSequence data, OutputStream output, Charset encoding) throws IOException {
|
|
if (data != null) {
|
|
write(data.toString(), output, encoding);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Writes chars from a <code>CharSequence</code> to bytes on an
|
|
* <code>OutputStream</code> using the specified character encoding.
|
|
* <p>
|
|
* Character encoding names can be found at
|
|
* <a href="http://www.iana.org/assignments/character-sets">IANA</a>.
|
|
* <p>
|
|
* This method uses {@link String#getBytes(String)}.
|
|
*
|
|
* @param data the <code>CharSequence</code> to write, null ignored
|
|
* @param output the <code>OutputStream</code> to write to
|
|
* @param encoding the encoding to use, null means platform default
|
|
* @throws NullPointerException if output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @throws UnsupportedCharsetException
|
|
* thrown instead of {@link UnsupportedEncodingException} in version 2.2 if the encoding is not
|
|
* supported.
|
|
* @since 2.0
|
|
*/
|
|
public static void write(CharSequence data, OutputStream output, String encoding) throws IOException {
|
|
write(data, output, Charsets.toCharset(encoding));
|
|
}
|
|
|
|
// write String
|
|
//-----------------------------------------------------------------------
|
|
/**
|
|
* Writes chars from a <code>String</code> to a <code>Writer</code>.
|
|
*
|
|
* @param data the <code>String</code> to write, null ignored
|
|
* @param output the <code>Writer</code> to write to
|
|
* @throws NullPointerException if output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since 1.1
|
|
*/
|
|
public static void write(String data, Writer output) throws IOException {
|
|
if (data != null) {
|
|
output.write(data);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Writes chars from a <code>String</code> to bytes on an
|
|
* <code>OutputStream</code> using the default character encoding of the
|
|
* platform.
|
|
* <p>
|
|
* This method uses {@link String#getBytes()}.
|
|
*
|
|
* @param data the <code>String</code> to write, null ignored
|
|
* @param output the <code>OutputStream</code> to write to
|
|
* @throws NullPointerException if output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since 1.1
|
|
*/
|
|
public static void write(String data, OutputStream output)
|
|
throws IOException {
|
|
write(data, output, Charset.defaultCharset());
|
|
}
|
|
|
|
/**
|
|
* Writes chars from a <code>String</code> to bytes on an
|
|
* <code>OutputStream</code> using the specified character encoding.
|
|
* <p>
|
|
* This method uses {@link String#getBytes(String)}.
|
|
*
|
|
* @param data the <code>String</code> to write, null ignored
|
|
* @param output the <code>OutputStream</code> to write to
|
|
* @param encoding the encoding to use, null means platform default
|
|
* @throws NullPointerException if output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since 2.3
|
|
*/
|
|
public static void write(String data, OutputStream output, Charset encoding) throws IOException {
|
|
if (data != null) {
|
|
output.write(data.getBytes(Charsets.toCharset(encoding)));
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Writes chars from a <code>String</code> to bytes on an
|
|
* <code>OutputStream</code> using the specified character encoding.
|
|
* <p>
|
|
* Character encoding names can be found at
|
|
* <a href="http://www.iana.org/assignments/character-sets">IANA</a>.
|
|
* <p>
|
|
* This method uses {@link String#getBytes(String)}.
|
|
*
|
|
* @param data the <code>String</code> to write, null ignored
|
|
* @param output the <code>OutputStream</code> to write to
|
|
* @param encoding the encoding to use, null means platform default
|
|
* @throws NullPointerException if output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @throws UnsupportedCharsetException
|
|
* thrown instead of {@link UnsupportedEncodingException} in version 2.2 if the encoding is not
|
|
* supported.
|
|
* @since 1.1
|
|
*/
|
|
public static void write(String data, OutputStream output, String encoding)
|
|
throws IOException {
|
|
write(data, output, Charsets.toCharset(encoding));
|
|
}
|
|
|
|
// write StringBuffer
|
|
//-----------------------------------------------------------------------
|
|
/**
|
|
* Writes chars from a <code>StringBuffer</code> to a <code>Writer</code>.
|
|
*
|
|
* @param data the <code>StringBuffer</code> to write, null ignored
|
|
* @param output the <code>Writer</code> to write to
|
|
* @throws NullPointerException if output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since 1.1
|
|
* @deprecated replaced by write(CharSequence, Writer)
|
|
*/
|
|
@Deprecated
|
|
public static void write(StringBuffer data, Writer output)
|
|
throws IOException {
|
|
if (data != null) {
|
|
output.write(data.toString());
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Writes chars from a <code>StringBuffer</code> to bytes on an
|
|
* <code>OutputStream</code> using the default character encoding of the
|
|
* platform.
|
|
* <p>
|
|
* This method uses {@link String#getBytes()}.
|
|
*
|
|
* @param data the <code>StringBuffer</code> to write, null ignored
|
|
* @param output the <code>OutputStream</code> to write to
|
|
* @throws NullPointerException if output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since 1.1
|
|
* @deprecated replaced by write(CharSequence, OutputStream)
|
|
*/
|
|
@Deprecated
|
|
public static void write(StringBuffer data, OutputStream output)
|
|
throws IOException {
|
|
write(data, output, (String) null);
|
|
}
|
|
|
|
/**
|
|
* Writes chars from a <code>StringBuffer</code> to bytes on an
|
|
* <code>OutputStream</code> using the specified character encoding.
|
|
* <p>
|
|
* Character encoding names can be found at
|
|
* <a href="http://www.iana.org/assignments/character-sets">IANA</a>.
|
|
* <p>
|
|
* This method uses {@link String#getBytes(String)}.
|
|
*
|
|
* @param data the <code>StringBuffer</code> to write, null ignored
|
|
* @param output the <code>OutputStream</code> to write to
|
|
* @param encoding the encoding to use, null means platform default
|
|
* @throws NullPointerException if output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @throws UnsupportedCharsetException
|
|
* thrown instead of {@link UnsupportedEncodingException} in version 2.2 if the encoding is not
|
|
* supported.
|
|
* @since 1.1
|
|
* @deprecated replaced by write(CharSequence, OutputStream, String)
|
|
*/
|
|
@Deprecated
|
|
public static void write(StringBuffer data, OutputStream output, String encoding) throws IOException {
|
|
if (data != null) {
|
|
output.write(data.toString().getBytes(Charsets.toCharset(encoding)));
|
|
}
|
|
}
|
|
|
|
// writeLines
|
|
//-----------------------------------------------------------------------
|
|
/**
|
|
* Writes the <code>toString()</code> value of each item in a collection to
|
|
* an <code>OutputStream</code> line by line, using the default character
|
|
* encoding of the platform and the specified line ending.
|
|
*
|
|
* @param lines the lines to write, null entries produce blank lines
|
|
* @param lineEnding the line separator to use, null is system default
|
|
* @param output the <code>OutputStream</code> to write to, not null, not closed
|
|
* @throws NullPointerException if the output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since 1.1
|
|
*/
|
|
public static void writeLines(Collection<?> lines, String lineEnding,
|
|
OutputStream output) throws IOException {
|
|
writeLines(lines, lineEnding, output, Charset.defaultCharset());
|
|
}
|
|
|
|
/**
|
|
* Writes the <code>toString()</code> value of each item in a collection to
|
|
* an <code>OutputStream</code> line by line, using the specified character
|
|
* encoding and the specified line ending.
|
|
*
|
|
* @param lines the lines to write, null entries produce blank lines
|
|
* @param lineEnding the line separator to use, null is system default
|
|
* @param output the <code>OutputStream</code> to write to, not null, not closed
|
|
* @param encoding the encoding to use, null means platform default
|
|
* @throws NullPointerException if the output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since 2.3
|
|
*/
|
|
public static void writeLines(Collection<?> lines, String lineEnding, OutputStream output, Charset encoding)
|
|
throws IOException {
|
|
if (lines == null) {
|
|
return;
|
|
}
|
|
if (lineEnding == null) {
|
|
lineEnding = LINE_SEPARATOR;
|
|
}
|
|
Charset cs = Charsets.toCharset(encoding);
|
|
for (Object line : lines) {
|
|
if (line != null) {
|
|
output.write(line.toString().getBytes(cs));
|
|
}
|
|
output.write(lineEnding.getBytes(cs));
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Writes the <code>toString()</code> value of each item in a collection to
|
|
* an <code>OutputStream</code> line by line, using the specified character
|
|
* encoding and the specified line ending.
|
|
* <p>
|
|
* Character encoding names can be found at
|
|
* <a href="http://www.iana.org/assignments/character-sets">IANA</a>.
|
|
*
|
|
* @param lines the lines to write, null entries produce blank lines
|
|
* @param lineEnding the line separator to use, null is system default
|
|
* @param output the <code>OutputStream</code> to write to, not null, not closed
|
|
* @param encoding the encoding to use, null means platform default
|
|
* @throws NullPointerException if the output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @throws UnsupportedCharsetException
|
|
* thrown instead of {@link UnsupportedEncodingException} in version 2.2 if the encoding is not
|
|
* supported.
|
|
* @since 1.1
|
|
*/
|
|
public static void writeLines(Collection<?> lines, String lineEnding,
|
|
OutputStream output, String encoding) throws IOException {
|
|
writeLines(lines, lineEnding, output, Charsets.toCharset(encoding));
|
|
}
|
|
|
|
/**
|
|
* Writes the <code>toString()</code> value of each item in a collection to
|
|
* a <code>Writer</code> line by line, using the specified line ending.
|
|
*
|
|
* @param lines the lines to write, null entries produce blank lines
|
|
* @param lineEnding the line separator to use, null is system default
|
|
* @param writer the <code>Writer</code> to write to, not null, not closed
|
|
* @throws NullPointerException if the input is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since 1.1
|
|
*/
|
|
public static void writeLines(Collection<?> lines, String lineEnding,
|
|
Writer writer) throws IOException {
|
|
if (lines == null) {
|
|
return;
|
|
}
|
|
if (lineEnding == null) {
|
|
lineEnding = LINE_SEPARATOR;
|
|
}
|
|
for (Object line : lines) {
|
|
if (line != null) {
|
|
writer.write(line.toString());
|
|
}
|
|
writer.write(lineEnding);
|
|
}
|
|
}
|
|
|
|
// copy from InputStream
|
|
//-----------------------------------------------------------------------
|
|
/**
|
|
* Copy bytes from an <code>InputStream</code> to an
|
|
* <code>OutputStream</code>.
|
|
* <p>
|
|
* This method buffers the input internally, so there is no need to use a
|
|
* <code>BufferedInputStream</code>.
|
|
* <p>
|
|
* Large streams (over 2GB) will return a bytes copied value of
|
|
* <code>-1</code> after the copy has completed since the correct
|
|
* number of bytes cannot be returned as an int. For large streams
|
|
* use the <code>copyLarge(InputStream, OutputStream)</code> method.
|
|
*
|
|
* @param input the <code>InputStream</code> to read from
|
|
* @param output the <code>OutputStream</code> to write to
|
|
* @return the number of bytes copied, or -1 if > Integer.MAX_VALUE
|
|
* @throws NullPointerException if the input or output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since 1.1
|
|
*/
|
|
public static int copy(InputStream input, OutputStream output) throws IOException {
|
|
long count = copyLarge(input, output);
|
|
if (count > Integer.MAX_VALUE) {
|
|
return -1;
|
|
}
|
|
return (int) count;
|
|
}
|
|
|
|
/**
|
|
* Copy bytes from a large (over 2GB) <code>InputStream</code> to an
|
|
* <code>OutputStream</code>.
|
|
* <p>
|
|
* This method buffers the input internally, so there is no need to use a
|
|
* <code>BufferedInputStream</code>.
|
|
* <p>
|
|
* The buffer size is given by {@link #DEFAULT_BUFFER_SIZE}.
|
|
*
|
|
* @param input the <code>InputStream</code> to read from
|
|
* @param output the <code>OutputStream</code> to write to
|
|
* @return the number of bytes copied
|
|
* @throws NullPointerException if the input or output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since 1.3
|
|
*/
|
|
public static long copyLarge(InputStream input, OutputStream output)
|
|
throws IOException {
|
|
return copyLarge(input, output, new byte[DEFAULT_BUFFER_SIZE]);
|
|
}
|
|
|
|
/**
|
|
* Copy bytes from a large (over 2GB) <code>InputStream</code> to an
|
|
* <code>OutputStream</code>.
|
|
* <p>
|
|
* This method uses the provided buffer, so there is no need to use a
|
|
* <code>BufferedInputStream</code>.
|
|
* <p>
|
|
*
|
|
* @param input the <code>InputStream</code> to read from
|
|
* @param output the <code>OutputStream</code> to write to
|
|
* @param buffer the buffer to use for the copy
|
|
* @return the number of bytes copied
|
|
* @throws NullPointerException if the input or output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since 2.2
|
|
*/
|
|
public static long copyLarge(InputStream input, OutputStream output, byte[] buffer)
|
|
throws IOException {
|
|
long count = 0;
|
|
int n = 0;
|
|
while (EOF != (n = input.read(buffer))) {
|
|
output.write(buffer, 0, n);
|
|
count += n;
|
|
}
|
|
return count;
|
|
}
|
|
|
|
/**
|
|
* Copy some or all bytes from a large (over 2GB) <code>InputStream</code> to an
|
|
* <code>OutputStream</code>, optionally skipping input bytes.
|
|
* <p>
|
|
* This method buffers the input internally, so there is no need to use a
|
|
* <code>BufferedInputStream</code>.
|
|
* <p>
|
|
* The buffer size is given by {@link #DEFAULT_BUFFER_SIZE}.
|
|
*
|
|
* @param input the <code>InputStream</code> to read from
|
|
* @param output the <code>OutputStream</code> to write to
|
|
* @param inputOffset : number of bytes to skip from input before copying
|
|
* -ve values are ignored
|
|
* @param length : number of bytes to copy. -ve means all
|
|
* @return the number of bytes copied
|
|
* @throws NullPointerException if the input or output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since 2.2
|
|
*/
|
|
public static long copyLarge(InputStream input, OutputStream output, long inputOffset, long length)
|
|
throws IOException {
|
|
return copyLarge(input, output, inputOffset, length, new byte[DEFAULT_BUFFER_SIZE]);
|
|
}
|
|
|
|
/**
|
|
* Copy some or all bytes from a large (over 2GB) <code>InputStream</code> to an
|
|
* <code>OutputStream</code>, optionally skipping input bytes.
|
|
* <p>
|
|
* This method uses the provided buffer, so there is no need to use a
|
|
* <code>BufferedInputStream</code>.
|
|
* <p>
|
|
*
|
|
* @param input the <code>InputStream</code> to read from
|
|
* @param output the <code>OutputStream</code> to write to
|
|
* @param inputOffset : number of bytes to skip from input before copying
|
|
* -ve values are ignored
|
|
* @param length : number of bytes to copy. -ve means all
|
|
* @param buffer the buffer to use for the copy
|
|
*
|
|
* @return the number of bytes copied
|
|
* @throws NullPointerException if the input or output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since 2.2
|
|
*/
|
|
public static long copyLarge(InputStream input, OutputStream output,
|
|
final long inputOffset, final long length, byte[] buffer) throws IOException {
|
|
if (inputOffset > 0) {
|
|
skipFully(input, inputOffset);
|
|
}
|
|
if (length == 0) {
|
|
return 0;
|
|
}
|
|
final int bufferLength = buffer.length;
|
|
int bytesToRead = bufferLength;
|
|
if (length > 0 && length < bufferLength) {
|
|
bytesToRead = (int) length;
|
|
}
|
|
int read;
|
|
long totalRead = 0;
|
|
while (bytesToRead > 0 && EOF != (read = input.read(buffer, 0, bytesToRead))) {
|
|
output.write(buffer, 0, read);
|
|
totalRead += read;
|
|
if (length > 0) { // only adjust length if not reading to the end
|
|
// Note the cast must work because buffer.length is an integer
|
|
bytesToRead = (int) Math.min(length - totalRead, bufferLength);
|
|
}
|
|
}
|
|
return totalRead;
|
|
}
|
|
|
|
/**
|
|
* Copy bytes from an <code>InputStream</code> to chars on a
|
|
* <code>Writer</code> using the default character encoding of the platform.
|
|
* <p>
|
|
* This method buffers the input internally, so there is no need to use a
|
|
* <code>BufferedInputStream</code>.
|
|
* <p>
|
|
* This method uses {@link InputStreamReader}.
|
|
*
|
|
* @param input the <code>InputStream</code> to read from
|
|
* @param output the <code>Writer</code> to write to
|
|
* @throws NullPointerException if the input or output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since 1.1
|
|
*/
|
|
public static void copy(InputStream input, Writer output)
|
|
throws IOException {
|
|
copy(input, output, Charset.defaultCharset());
|
|
}
|
|
|
|
/**
|
|
* Copy bytes from an <code>InputStream</code> to chars on a
|
|
* <code>Writer</code> using the specified character encoding.
|
|
* <p>
|
|
* This method buffers the input internally, so there is no need to use a
|
|
* <code>BufferedInputStream</code>.
|
|
* <p>
|
|
* This method uses {@link InputStreamReader}.
|
|
*
|
|
* @param input the <code>InputStream</code> to read from
|
|
* @param output the <code>Writer</code> to write to
|
|
* @param encoding the encoding to use, null means platform default
|
|
* @throws NullPointerException if the input or output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since 2.3
|
|
*/
|
|
public static void copy(InputStream input, Writer output, Charset encoding) throws IOException {
|
|
InputStreamReader in = new InputStreamReader(input, Charsets.toCharset(encoding));
|
|
copy(in, output);
|
|
}
|
|
|
|
/**
|
|
* Copy bytes from an <code>InputStream</code> to chars on a
|
|
* <code>Writer</code> using the specified character encoding.
|
|
* <p>
|
|
* This method buffers the input internally, so there is no need to use a
|
|
* <code>BufferedInputStream</code>.
|
|
* <p>
|
|
* Character encoding names can be found at
|
|
* <a href="http://www.iana.org/assignments/character-sets">IANA</a>.
|
|
* <p>
|
|
* This method uses {@link InputStreamReader}.
|
|
*
|
|
* @param input the <code>InputStream</code> to read from
|
|
* @param output the <code>Writer</code> to write to
|
|
* @param encoding the encoding to use, null means platform default
|
|
* @throws NullPointerException if the input or output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @throws UnsupportedCharsetException
|
|
* thrown instead of {@link UnsupportedEncodingException} in version 2.2 if the encoding is not
|
|
* supported.
|
|
* @since 1.1
|
|
*/
|
|
public static void copy(InputStream input, Writer output, String encoding) throws IOException {
|
|
copy(input, output, Charsets.toCharset(encoding));
|
|
}
|
|
|
|
// copy from Reader
|
|
//-----------------------------------------------------------------------
|
|
/**
|
|
* Copy chars from a <code>Reader</code> to a <code>Writer</code>.
|
|
* <p>
|
|
* This method buffers the input internally, so there is no need to use a
|
|
* <code>BufferedReader</code>.
|
|
* <p>
|
|
* Large streams (over 2GB) will return a chars copied value of
|
|
* <code>-1</code> after the copy has completed since the correct
|
|
* number of chars cannot be returned as an int. For large streams
|
|
* use the <code>copyLarge(Reader, Writer)</code> method.
|
|
*
|
|
* @param input the <code>Reader</code> to read from
|
|
* @param output the <code>Writer</code> to write to
|
|
* @return the number of characters copied, or -1 if > Integer.MAX_VALUE
|
|
* @throws NullPointerException if the input or output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since 1.1
|
|
*/
|
|
public static int copy(Reader input, Writer output) throws IOException {
|
|
long count = copyLarge(input, output);
|
|
if (count > Integer.MAX_VALUE) {
|
|
return -1;
|
|
}
|
|
return (int) count;
|
|
}
|
|
|
|
/**
|
|
* Copy chars from a large (over 2GB) <code>Reader</code> to a <code>Writer</code>.
|
|
* <p>
|
|
* This method buffers the input internally, so there is no need to use a
|
|
* <code>BufferedReader</code>.
|
|
* <p>
|
|
* The buffer size is given by {@link #DEFAULT_BUFFER_SIZE}.
|
|
*
|
|
* @param input the <code>Reader</code> to read from
|
|
* @param output the <code>Writer</code> to write to
|
|
* @return the number of characters copied
|
|
* @throws NullPointerException if the input or output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since 1.3
|
|
*/
|
|
public static long copyLarge(Reader input, Writer output) throws IOException {
|
|
return copyLarge(input, output, new char[DEFAULT_BUFFER_SIZE]);
|
|
}
|
|
|
|
/**
|
|
* Copy chars from a large (over 2GB) <code>Reader</code> to a <code>Writer</code>.
|
|
* <p>
|
|
* This method uses the provided buffer, so there is no need to use a
|
|
* <code>BufferedReader</code>.
|
|
* <p>
|
|
*
|
|
* @param input the <code>Reader</code> to read from
|
|
* @param output the <code>Writer</code> to write to
|
|
* @param buffer the buffer to be used for the copy
|
|
* @return the number of characters copied
|
|
* @throws NullPointerException if the input or output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since 2.2
|
|
*/
|
|
public static long copyLarge(Reader input, Writer output, char [] buffer) throws IOException {
|
|
long count = 0;
|
|
int n = 0;
|
|
while (EOF != (n = input.read(buffer))) {
|
|
output.write(buffer, 0, n);
|
|
count += n;
|
|
}
|
|
return count;
|
|
}
|
|
|
|
/**
|
|
* Copy some or all chars from a large (over 2GB) <code>InputStream</code> to an
|
|
* <code>OutputStream</code>, optionally skipping input chars.
|
|
* <p>
|
|
* This method buffers the input internally, so there is no need to use a
|
|
* <code>BufferedReader</code>.
|
|
* <p>
|
|
* The buffer size is given by {@link #DEFAULT_BUFFER_SIZE}.
|
|
*
|
|
* @param input the <code>Reader</code> to read from
|
|
* @param output the <code>Writer</code> to write to
|
|
* @param inputOffset : number of chars to skip from input before copying
|
|
* -ve values are ignored
|
|
* @param length : number of chars to copy. -ve means all
|
|
* @return the number of chars copied
|
|
* @throws NullPointerException if the input or output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since 2.2
|
|
*/
|
|
public static long copyLarge(Reader input, Writer output, final long inputOffset, final long length)
|
|
throws IOException {
|
|
return copyLarge(input, output, inputOffset, length, new char[DEFAULT_BUFFER_SIZE]);
|
|
}
|
|
|
|
/**
|
|
* Copy some or all chars from a large (over 2GB) <code>InputStream</code> to an
|
|
* <code>OutputStream</code>, optionally skipping input chars.
|
|
* <p>
|
|
* This method uses the provided buffer, so there is no need to use a
|
|
* <code>BufferedReader</code>.
|
|
* <p>
|
|
*
|
|
* @param input the <code>Reader</code> to read from
|
|
* @param output the <code>Writer</code> to write to
|
|
* @param inputOffset : number of chars to skip from input before copying
|
|
* -ve values are ignored
|
|
* @param length : number of chars to copy. -ve means all
|
|
* @param buffer the buffer to be used for the copy
|
|
* @return the number of chars copied
|
|
* @throws NullPointerException if the input or output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since 2.2
|
|
*/
|
|
public static long copyLarge(Reader input, Writer output, final long inputOffset, final long length, char [] buffer)
|
|
throws IOException {
|
|
if (inputOffset > 0) {
|
|
skipFully(input, inputOffset);
|
|
}
|
|
if (length == 0) {
|
|
return 0;
|
|
}
|
|
int bytesToRead = buffer.length;
|
|
if (length > 0 && length < buffer.length) {
|
|
bytesToRead = (int) length;
|
|
}
|
|
int read;
|
|
long totalRead = 0;
|
|
while (bytesToRead > 0 && EOF != (read = input.read(buffer, 0, bytesToRead))) {
|
|
output.write(buffer, 0, read);
|
|
totalRead += read;
|
|
if (length > 0) { // only adjust length if not reading to the end
|
|
// Note the cast must work because buffer.length is an integer
|
|
bytesToRead = (int) Math.min(length - totalRead, buffer.length);
|
|
}
|
|
}
|
|
return totalRead;
|
|
}
|
|
|
|
/**
|
|
* Copy chars from a <code>Reader</code> to bytes on an
|
|
* <code>OutputStream</code> using the default character encoding of the
|
|
* platform, and calling flush.
|
|
* <p>
|
|
* This method buffers the input internally, so there is no need to use a
|
|
* <code>BufferedReader</code>.
|
|
* <p>
|
|
* Due to the implementation of OutputStreamWriter, this method performs a
|
|
* flush.
|
|
* <p>
|
|
* This method uses {@link OutputStreamWriter}.
|
|
*
|
|
* @param input the <code>Reader</code> to read from
|
|
* @param output the <code>OutputStream</code> to write to
|
|
* @throws NullPointerException if the input or output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since 1.1
|
|
*/
|
|
public static void copy(Reader input, OutputStream output)
|
|
throws IOException {
|
|
copy(input, output, Charset.defaultCharset());
|
|
}
|
|
|
|
/**
|
|
* Copy chars from a <code>Reader</code> to bytes on an
|
|
* <code>OutputStream</code> using the specified character encoding, and
|
|
* calling flush.
|
|
* <p>
|
|
* This method buffers the input internally, so there is no need to use a
|
|
* <code>BufferedReader</code>.
|
|
* </p>
|
|
* <p>
|
|
* Due to the implementation of OutputStreamWriter, this method performs a
|
|
* flush.
|
|
* </p>
|
|
* <p>
|
|
* This method uses {@link OutputStreamWriter}.
|
|
* </p>
|
|
*
|
|
* @param input the <code>Reader</code> to read from
|
|
* @param output the <code>OutputStream</code> to write to
|
|
* @param encoding the encoding to use, null means platform default
|
|
* @throws NullPointerException if the input or output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since 2.3
|
|
*/
|
|
public static void copy(Reader input, OutputStream output, Charset encoding) throws IOException {
|
|
OutputStreamWriter out = new OutputStreamWriter(output, Charsets.toCharset(encoding));
|
|
copy(input, out);
|
|
// XXX Unless anyone is planning on rewriting OutputStreamWriter,
|
|
// we have to flush here.
|
|
out.flush();
|
|
}
|
|
|
|
/**
|
|
* Copy chars from a <code>Reader</code> to bytes on an
|
|
* <code>OutputStream</code> using the specified character encoding, and
|
|
* calling flush.
|
|
* <p>
|
|
* This method buffers the input internally, so there is no need to use a
|
|
* <code>BufferedReader</code>.
|
|
* <p>
|
|
* Character encoding names can be found at
|
|
* <a href="http://www.iana.org/assignments/character-sets">IANA</a>.
|
|
* <p>
|
|
* Due to the implementation of OutputStreamWriter, this method performs a
|
|
* flush.
|
|
* <p>
|
|
* This method uses {@link OutputStreamWriter}.
|
|
*
|
|
* @param input the <code>Reader</code> to read from
|
|
* @param output the <code>OutputStream</code> to write to
|
|
* @param encoding the encoding to use, null means platform default
|
|
* @throws NullPointerException if the input or output is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @throws UnsupportedCharsetException
|
|
* thrown instead of {@link UnsupportedEncodingException} in version 2.2 if the encoding is not
|
|
* supported.
|
|
* @since 1.1
|
|
*/
|
|
public static void copy(Reader input, OutputStream output, String encoding) throws IOException {
|
|
copy(input, output, Charsets.toCharset(encoding));
|
|
}
|
|
|
|
// content equals
|
|
//-----------------------------------------------------------------------
|
|
/**
|
|
* Compare the contents of two Streams to determine if they are equal or
|
|
* not.
|
|
* <p>
|
|
* This method buffers the input internally using
|
|
* <code>BufferedInputStream</code> if they are not already buffered.
|
|
*
|
|
* @param input1 the first stream
|
|
* @param input2 the second stream
|
|
* @return true if the content of the streams are equal or they both don't
|
|
* exist, false otherwise
|
|
* @throws NullPointerException if either input is null
|
|
* @throws IOException if an I/O error occurs
|
|
*/
|
|
public static boolean contentEquals(InputStream input1, InputStream input2)
|
|
throws IOException {
|
|
if (!(input1 instanceof BufferedInputStream)) {
|
|
input1 = new BufferedInputStream(input1);
|
|
}
|
|
if (!(input2 instanceof BufferedInputStream)) {
|
|
input2 = new BufferedInputStream(input2);
|
|
}
|
|
|
|
int ch = input1.read();
|
|
while (EOF != ch) {
|
|
int ch2 = input2.read();
|
|
if (ch != ch2) {
|
|
return false;
|
|
}
|
|
ch = input1.read();
|
|
}
|
|
|
|
int ch2 = input2.read();
|
|
return ch2 == EOF;
|
|
}
|
|
|
|
/**
|
|
* Compare the contents of two Readers to determine if they are equal or
|
|
* not.
|
|
* <p>
|
|
* This method buffers the input internally using
|
|
* <code>BufferedReader</code> if they are not already buffered.
|
|
*
|
|
* @param input1 the first reader
|
|
* @param input2 the second reader
|
|
* @return true if the content of the readers are equal or they both don't
|
|
* exist, false otherwise
|
|
* @throws NullPointerException if either input is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since 1.1
|
|
*/
|
|
public static boolean contentEquals(Reader input1, Reader input2)
|
|
throws IOException {
|
|
|
|
input1 = toBufferedReader(input1);
|
|
input2 = toBufferedReader(input2);
|
|
|
|
int ch = input1.read();
|
|
while (EOF != ch) {
|
|
int ch2 = input2.read();
|
|
if (ch != ch2) {
|
|
return false;
|
|
}
|
|
ch = input1.read();
|
|
}
|
|
|
|
int ch2 = input2.read();
|
|
return ch2 == EOF;
|
|
}
|
|
|
|
/**
|
|
* Compare the contents of two Readers to determine if they are equal or
|
|
* not, ignoring EOL characters.
|
|
* <p>
|
|
* This method buffers the input internally using
|
|
* <code>BufferedReader</code> if they are not already buffered.
|
|
*
|
|
* @param input1 the first reader
|
|
* @param input2 the second reader
|
|
* @return true if the content of the readers are equal (ignoring EOL differences), false otherwise
|
|
* @throws NullPointerException if either input is null
|
|
* @throws IOException if an I/O error occurs
|
|
* @since 2.2
|
|
*/
|
|
public static boolean contentEqualsIgnoreEOL(Reader input1, Reader input2)
|
|
throws IOException {
|
|
BufferedReader br1 = toBufferedReader(input1);
|
|
BufferedReader br2 = toBufferedReader(input2);
|
|
|
|
String line1 = br1.readLine();
|
|
String line2 = br2.readLine();
|
|
while (line1 != null && line2 != null && line1.equals(line2)) {
|
|
line1 = br1.readLine();
|
|
line2 = br2.readLine();
|
|
}
|
|
return line1 == null ? line2 == null ? true : false : line1.equals(line2);
|
|
}
|
|
|
|
/**
|
|
* Skip bytes from an input byte stream.
|
|
* This implementation guarantees that it will read as many bytes
|
|
* as possible before giving up; this may not always be the case for
|
|
* subclasses of {@link Reader}.
|
|
*
|
|
* @param input byte stream to skip
|
|
* @param toSkip number of bytes to skip.
|
|
* @return number of bytes actually skipped.
|
|
*
|
|
* @see InputStream#skip(long)
|
|
*
|
|
* @throws IOException if there is a problem reading the file
|
|
* @throws IllegalArgumentException if toSkip is negative
|
|
* @since 2.0
|
|
*/
|
|
public static long skip(InputStream input, long toSkip) throws IOException {
|
|
if (toSkip < 0) {
|
|
throw new IllegalArgumentException("Skip count must be non-negative, actual: " + toSkip);
|
|
}
|
|
/*
|
|
* N.B. no need to synchronize this because: - we don't care if the buffer is created multiple times (the data
|
|
* is ignored) - we always use the same size buffer, so if it it is recreated it will still be OK (if the buffer
|
|
* size were variable, we would need to synch. to ensure some other thread did not create a smaller one)
|
|
*/
|
|
if (SKIP_BYTE_BUFFER == null) {
|
|
SKIP_BYTE_BUFFER = new byte[SKIP_BUFFER_SIZE];
|
|
}
|
|
long remain = toSkip;
|
|
while (remain > 0) {
|
|
long n = input.read(SKIP_BYTE_BUFFER, 0, (int) Math.min(remain, SKIP_BUFFER_SIZE));
|
|
if (n < 0) { // EOF
|
|
break;
|
|
}
|
|
remain -= n;
|
|
}
|
|
return toSkip - remain;
|
|
}
|
|
|
|
/**
|
|
* Skip characters from an input character stream.
|
|
* This implementation guarantees that it will read as many characters
|
|
* as possible before giving up; this may not always be the case for
|
|
* subclasses of {@link Reader}.
|
|
*
|
|
* @param input character stream to skip
|
|
* @param toSkip number of characters to skip.
|
|
* @return number of characters actually skipped.
|
|
*
|
|
* @see Reader#skip(long)
|
|
*
|
|
* @throws IOException if there is a problem reading the file
|
|
* @throws IllegalArgumentException if toSkip is negative
|
|
* @since 2.0
|
|
*/
|
|
public static long skip(Reader input, long toSkip) throws IOException {
|
|
if (toSkip < 0) {
|
|
throw new IllegalArgumentException("Skip count must be non-negative, actual: " + toSkip);
|
|
}
|
|
/*
|
|
* N.B. no need to synchronize this because: - we don't care if the buffer is created multiple times (the data
|
|
* is ignored) - we always use the same size buffer, so if it it is recreated it will still be OK (if the buffer
|
|
* size were variable, we would need to synch. to ensure some other thread did not create a smaller one)
|
|
*/
|
|
if (SKIP_CHAR_BUFFER == null) {
|
|
SKIP_CHAR_BUFFER = new char[SKIP_BUFFER_SIZE];
|
|
}
|
|
long remain = toSkip;
|
|
while (remain > 0) {
|
|
long n = input.read(SKIP_CHAR_BUFFER, 0, (int) Math.min(remain, SKIP_BUFFER_SIZE));
|
|
if (n < 0) { // EOF
|
|
break;
|
|
}
|
|
remain -= n;
|
|
}
|
|
return toSkip - remain;
|
|
}
|
|
|
|
/**
|
|
* Skip the requested number of bytes or fail if there are not enough left.
|
|
* <p>
|
|
* This allows for the possibility that {@link InputStream#skip(long)} may
|
|
* not skip as many bytes as requested (most likely because of reaching EOF).
|
|
*
|
|
* @param input stream to skip
|
|
* @param toSkip the number of bytes to skip
|
|
* @see InputStream#skip(long)
|
|
*
|
|
* @throws IOException if there is a problem reading the file
|
|
* @throws IllegalArgumentException if toSkip is negative
|
|
* @throws EOFException if the number of bytes skipped was incorrect
|
|
* @since 2.0
|
|
*/
|
|
public static void skipFully(InputStream input, long toSkip) throws IOException {
|
|
if (toSkip < 0) {
|
|
throw new IllegalArgumentException("Bytes to skip must not be negative: " + toSkip);
|
|
}
|
|
long skipped = skip(input, toSkip);
|
|
if (skipped != toSkip) {
|
|
throw new EOFException("Bytes to skip: " + toSkip + " actual: " + skipped);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Skip the requested number of characters or fail if there are not enough left.
|
|
* <p>
|
|
* This allows for the possibility that {@link Reader#skip(long)} may
|
|
* not skip as many characters as requested (most likely because of reaching EOF).
|
|
*
|
|
* @param input stream to skip
|
|
* @param toSkip the number of characters to skip
|
|
* @see Reader#skip(long)
|
|
*
|
|
* @throws IOException if there is a problem reading the file
|
|
* @throws IllegalArgumentException if toSkip is negative
|
|
* @throws EOFException if the number of characters skipped was incorrect
|
|
* @since 2.0
|
|
*/
|
|
public static void skipFully(Reader input, long toSkip) throws IOException {
|
|
long skipped = skip(input, toSkip);
|
|
if (skipped != toSkip) {
|
|
throw new EOFException("Chars to skip: " + toSkip + " actual: " + skipped);
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Read characters from an input character stream.
|
|
* This implementation guarantees that it will read as many characters
|
|
* as possible before giving up; this may not always be the case for
|
|
* subclasses of {@link Reader}.
|
|
*
|
|
* @param input where to read input from
|
|
* @param buffer destination
|
|
* @param offset inital offset into buffer
|
|
* @param length length to read, must be >= 0
|
|
* @return actual length read; may be less than requested if EOF was reached
|
|
* @throws IOException if a read error occurs
|
|
* @since 2.2
|
|
*/
|
|
public static int read(Reader input, char[] buffer, int offset, int length) throws IOException {
|
|
if (length < 0) {
|
|
throw new IllegalArgumentException("Length must not be negative: " + length);
|
|
}
|
|
int remaining = length;
|
|
while (remaining > 0) {
|
|
int location = length - remaining;
|
|
int count = input.read(buffer, offset + location, remaining);
|
|
if (EOF == count) { // EOF
|
|
break;
|
|
}
|
|
remaining -= count;
|
|
}
|
|
return length - remaining;
|
|
}
|
|
|
|
/**
|
|
* Read characters from an input character stream.
|
|
* This implementation guarantees that it will read as many characters
|
|
* as possible before giving up; this may not always be the case for
|
|
* subclasses of {@link Reader}.
|
|
*
|
|
* @param input where to read input from
|
|
* @param buffer destination
|
|
* @return actual length read; may be less than requested if EOF was reached
|
|
* @throws IOException if a read error occurs
|
|
* @since 2.2
|
|
*/
|
|
public static int read(Reader input, char[] buffer) throws IOException {
|
|
return read(input, buffer, 0, buffer.length);
|
|
}
|
|
|
|
/**
|
|
* Read bytes from an input stream.
|
|
* This implementation guarantees that it will read as many bytes
|
|
* as possible before giving up; this may not always be the case for
|
|
* subclasses of {@link InputStream}.
|
|
*
|
|
* @param input where to read input from
|
|
* @param buffer destination
|
|
* @param offset inital offset into buffer
|
|
* @param length length to read, must be >= 0
|
|
* @return actual length read; may be less than requested if EOF was reached
|
|
* @throws IOException if a read error occurs
|
|
* @since 2.2
|
|
*/
|
|
public static int read(InputStream input, byte[] buffer, int offset, int length) throws IOException {
|
|
if (length < 0) {
|
|
throw new IllegalArgumentException("Length must not be negative: " + length);
|
|
}
|
|
int remaining = length;
|
|
while (remaining > 0) {
|
|
int location = length - remaining;
|
|
int count = input.read(buffer, offset + location, remaining);
|
|
if (EOF == count) { // EOF
|
|
break;
|
|
}
|
|
remaining -= count;
|
|
}
|
|
return length - remaining;
|
|
}
|
|
|
|
/**
|
|
* Read bytes from an input stream.
|
|
* This implementation guarantees that it will read as many bytes
|
|
* as possible before giving up; this may not always be the case for
|
|
* subclasses of {@link InputStream}.
|
|
*
|
|
* @param input where to read input from
|
|
* @param buffer destination
|
|
* @return actual length read; may be less than requested if EOF was reached
|
|
* @throws IOException if a read error occurs
|
|
* @since 2.2
|
|
*/
|
|
public static int read(InputStream input, byte[] buffer) throws IOException {
|
|
return read(input, buffer, 0, buffer.length);
|
|
}
|
|
|
|
/**
|
|
* Read the requested number of characters or fail if there are not enough left.
|
|
* <p>
|
|
* This allows for the possibility that {@link Reader#read(char[], int, int)} may
|
|
* not read as many characters as requested (most likely because of reaching EOF).
|
|
*
|
|
* @param input where to read input from
|
|
* @param buffer destination
|
|
* @param offset inital offset into buffer
|
|
* @param length length to read, must be >= 0
|
|
*
|
|
* @throws IOException if there is a problem reading the file
|
|
* @throws IllegalArgumentException if length is negative
|
|
* @throws EOFException if the number of characters read was incorrect
|
|
* @since 2.2
|
|
*/
|
|
public static void readFully(Reader input, char[] buffer, int offset, int length) throws IOException {
|
|
int actual = read(input, buffer, offset, length);
|
|
if (actual != length) {
|
|
throw new EOFException("Length to read: " + length + " actual: " + actual);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Read the requested number of characters or fail if there are not enough left.
|
|
* <p>
|
|
* This allows for the possibility that {@link Reader#read(char[], int, int)} may
|
|
* not read as many characters as requested (most likely because of reaching EOF).
|
|
*
|
|
* @param input where to read input from
|
|
* @param buffer destination
|
|
*
|
|
* @throws IOException if there is a problem reading the file
|
|
* @throws IllegalArgumentException if length is negative
|
|
* @throws EOFException if the number of characters read was incorrect
|
|
* @since 2.2
|
|
*/
|
|
public static void readFully(Reader input, char[] buffer) throws IOException {
|
|
readFully(input, buffer, 0, buffer.length);
|
|
}
|
|
|
|
/**
|
|
* Read the requested number of bytes or fail if there are not enough left.
|
|
* <p>
|
|
* This allows for the possibility that {@link InputStream#read(byte[], int, int)} may
|
|
* not read as many bytes as requested (most likely because of reaching EOF).
|
|
*
|
|
* @param input where to read input from
|
|
* @param buffer destination
|
|
* @param offset inital offset into buffer
|
|
* @param length length to read, must be >= 0
|
|
*
|
|
* @throws IOException if there is a problem reading the file
|
|
* @throws IllegalArgumentException if length is negative
|
|
* @throws EOFException if the number of bytes read was incorrect
|
|
* @since 2.2
|
|
*/
|
|
public static void readFully(InputStream input, byte[] buffer, int offset, int length) throws IOException {
|
|
int actual = read(input, buffer, offset, length);
|
|
if (actual != length) {
|
|
throw new EOFException("Length to read: " + length + " actual: " + actual);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Read the requested number of bytes or fail if there are not enough left.
|
|
* <p>
|
|
* This allows for the possibility that {@link InputStream#read(byte[], int, int)} may
|
|
* not read as many bytes as requested (most likely because of reaching EOF).
|
|
*
|
|
* @param input where to read input from
|
|
* @param buffer destination
|
|
*
|
|
* @throws IOException if there is a problem reading the file
|
|
* @throws IllegalArgumentException if length is negative
|
|
* @throws EOFException if the number of bytes read was incorrect
|
|
* @since 2.2
|
|
*/
|
|
public static void readFully(InputStream input, byte[] buffer) throws IOException {
|
|
readFully(input, buffer, 0, buffer.length);
|
|
}
|
|
}
|