121 lines
4.1 KiB
Java
121 lines
4.1 KiB
Java
package org.gcube.application.framework.core.util;
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import java.io.BufferedReader;
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import java.io.ByteArrayInputStream;
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import java.io.ByteArrayOutputStream;
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import java.io.InputStreamReader;
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import java.io.Reader;
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import java.io.StringWriter;
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import javax.xml.parsers.DocumentBuilderFactory;
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import javax.xml.transform.Transformer;
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import javax.xml.transform.TransformerFactory;
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import javax.xml.transform.stream.StreamResult;
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import javax.xml.transform.stream.StreamSource;
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import org.apache.xml.serialize.OutputFormat;
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import org.apache.xml.serialize.XMLSerializer;
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import org.w3c.dom.Document;
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/**
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* @author Valia Tsagkalidou (KNUA)
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*
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*/
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public class TransformXSLT {
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/**
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* Transforms an xml document based on the given xslt
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* @param xslt the xslt for transforming the xml
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* @param xml the xml to be transformed
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* @return a string containing the transformed xml (output of the transformation)
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*/
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public static String transform(String xslt, String xml)
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{
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Transformer transformer;
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try
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{//Retrieve the XSLT from the DIS (generic resource), and create the transformer
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ByteArrayInputStream xsltStream = new ByteArrayInputStream(xslt.getBytes());
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TransformerFactory tFactory = TransformerFactory.newInstance();
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transformer = tFactory.newTransformer(new StreamSource(xsltStream));
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DocumentBuilderFactory dfactory = DocumentBuilderFactory.newInstance();
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Document doc = null;
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doc = dfactory.newDocumentBuilder().parse(xml);
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// Apply the transformation
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ByteArrayOutputStream ba_stream = new ByteArrayOutputStream();
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OutputFormat format = new OutputFormat(doc);
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format.setIndenting(false);
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format.setOmitDocumentType(true);
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format.setOmitXMLDeclaration(true);
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StringWriter writer = new StringWriter();
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XMLSerializer serial = new XMLSerializer(writer,format);
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serial.serialize(doc);
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transformer.transform(new StreamSource(new ByteArrayInputStream(writer.toString().getBytes())), new StreamResult(ba_stream));
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//Prepares the object to be returned
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StringBuffer buffer = new StringBuffer();
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try {
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InputStreamReader isr = new InputStreamReader( new ByteArrayInputStream(ba_stream.toByteArray()),
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"UTF8");
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Reader in2 = new BufferedReader(isr);
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int ch;
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while ((ch = in2.read()) > -1) {
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buffer.append((char)ch);
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}
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in2.close();
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return buffer.toString();
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} catch (Exception e) {
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e.printStackTrace();
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}
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}
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catch (Exception e) {
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e.printStackTrace();
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}
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return null;
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}
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/**
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* Transforms an xml document based on the given transformer
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* @param transformer the transformer based on which the transformation will be applied
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* @param xml the xml document to be transformed
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* @return a string containing the transformed xml (output of the transformation)
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*/
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public static String transform(Transformer transformer, String xml)
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{
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DocumentBuilderFactory dfactory = DocumentBuilderFactory.newInstance();
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Document doc = null;
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try
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{
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doc = dfactory.newDocumentBuilder().parse(xml);
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ByteArrayOutputStream ba_stream = new ByteArrayOutputStream();
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OutputFormat format = new OutputFormat(doc);
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format.setIndenting(false);
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format.setOmitDocumentType(true);
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format.setOmitXMLDeclaration(true);
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StringWriter writer = new StringWriter();
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XMLSerializer serial = new XMLSerializer(writer,format);
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serial.serialize(doc);
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transformer.transform(new StreamSource(new ByteArrayInputStream(writer.toString().getBytes())), new StreamResult(ba_stream));
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//Prepares the object to be returned
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StringBuffer buffer = new StringBuffer();
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try {
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InputStreamReader isr = new InputStreamReader( new ByteArrayInputStream(ba_stream.toByteArray()),
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"UTF8");
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Reader in2 = new BufferedReader(isr);
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int ch;
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while ((ch = in2.read()) > -1) {
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buffer.append((char)ch);
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}
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in2.close();
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return buffer.toString();
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} catch (Exception e) {
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e.printStackTrace();
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}
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}
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catch (Exception e) {
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e.printStackTrace();
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}
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return null;
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}
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}
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