67 lines
2.3 KiB
Java
67 lines
2.3 KiB
Java
package eu.dnetlib.data.collector.plugins.ariadneplus.ads;
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import java.io.File;
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import java.net.MalformedURLException;
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import java.net.URL;
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import java.util.Iterator;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import com.google.common.collect.Iterators;
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import eu.dnetlib.data.collector.plugins.filesystem.FileSystemIterator;
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import eu.dnetlib.rmi.data.CollectorServiceException;
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import eu.dnetlib.rmi.data.InterfaceDescriptor;
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public class FolderCollectorPlugin extends FileJSONCollectorPlugin {
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private Iterator<String> recordIterator;
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private URL basePath;
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/** The Constant log. */
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private static final Log log = LogFactory.getLog(FolderCollectorPlugin.class);
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@Override
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public Iterable<String> collect(final InterfaceDescriptor interfaceDescriptor, final String fromDate, final String untilDate)
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throws CollectorServiceException {
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final String baseUrl = interfaceDescriptor.getBaseUrl();
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if (baseUrl == null || baseUrl.isEmpty()) { throw new CollectorServiceException("Param 'baseurl' is null or empty"); }
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String url = "file://".concat(baseUrl);
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try {
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basePath = new URL(url);
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} catch (MalformedURLException mue) {
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log.error("Failed collecting json from base url " + url, mue);
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throw new CollectorServiceException(mue);
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}
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File baseDir = new File(basePath.getPath());
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if (!baseDir.exists()) { throw new CollectorServiceException(String.format("The base ULR %s, does not exist", basePath.getPath())); }
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log.debug("Start collecting json from folder " + baseDir + " ...");
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final FileSystemIterator fsi = new FileSystemIterator(baseDir.getAbsolutePath(), "json");
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boolean emptyIterator = true;
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while (fsi.hasNext()) {
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String nextFilePath = fsi.next();
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interfaceDescriptor.setBaseUrl("file://".concat(nextFilePath));
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try {
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log.debug("Add iterator from " + nextFilePath);
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if (emptyIterator) {
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recordIterator = super.collect(interfaceDescriptor, fromDate, untilDate).iterator();
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emptyIterator = false;
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}
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else {
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recordIterator = Iterators.concat(recordIterator, super.collect(interfaceDescriptor, fromDate, untilDate).iterator());
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}
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} catch (CollectorServiceException e) {
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log.error("Failed collecting json from path: " + nextFilePath, e);
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}
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}
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return new ADSIterable(recordIterator);
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}
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}
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