//zipParser.java
//------------------------
//part of YaCy
//(C) by Michael Peter Christen; mc@anomic.de
//first published on http://www.anomic.de
//Frankfurt, Germany, 2005
//
//this file is contributed by Martin Thelian
//last major change: 16.05.2005
//
//This program is free software; you can redistribute it and/or modify
//it under the terms of the GNU General Public License as published by
//the Free Software Foundation; either version 2 of the License, or
//(at your option) any later version.
//
//This program is distributed in the hope that it will be useful,
//but WITHOUT ANY WARRANTY; without even the implied warranty of
//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
//GNU General Public License for more details.
//
//You should have received a copy of the GNU General Public License
//along with this program; if not, write to the Free Software
//Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
//Using this software in any meaning (reading, learning, copying, compiling,
//running) means that you agree that the Author(s) is (are) not responsible
//for cost, loss of data or any harm that may be caused directly or indirectly
//by usage of this softare or this documentation. The usage of this software
//is on your own risk. The installation and usage (starting/running) of this
//software may allow other people or application to access your computer and
//any attached devices and is highly dependent on the configuration of the
//software which must be done by the user of the software; the author(s) is
//(are) also not responsible for proper configuration and usage of the
//software, even if provoked by documentation provided together with
//the software.
//
//Any changes to this file according to the GPL as documented in the file
//gpl.txt aside this file in the shipment you received can be done to the
//lines that follows this copyright notice here, but changes must not be
//done inside the copyright notive above. A re-distribution must contain
//the intact and unchanged copyright notice.
//Contributions and changes to the program code must be marked as such.
package de.anomic.plasma.parser.zip;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import de.anomic.net.URL;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.LinkedList;
import java.util.Map;
import java.util.TreeSet;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import de.anomic.plasma.plasmaParser;
import de.anomic.plasma.plasmaParserDocument;
import de.anomic.plasma.parser.AbstractParser;
import de.anomic.plasma.parser.Parser;
import de.anomic.plasma.parser.ParserException;
import de.anomic.server.serverByteBuffer;
public class zipParser extends AbstractParser implements Parser {
/**
* a list of mime types that are supported by this parser class
* @see #getSupportedMimeTypes()
*/
public static final Hashtable SUPPORTED_MIME_TYPES = new Hashtable();
static {
SUPPORTED_MIME_TYPES.put("application/zip","zip");
SUPPORTED_MIME_TYPES.put("application/x-zip","zip");
SUPPORTED_MIME_TYPES.put("application/x-zip-compressed","zip");
SUPPORTED_MIME_TYPES.put("application/java-archive","jar");
}
/**
* a list of library names that are needed by this parser
* @see Parser#getLibxDependences()
*/
private static final String[] LIBX_DEPENDENCIES = new String[] {};
public zipParser() {
super(LIBX_DEPENDENCIES);
parserName = "Compressed Archive File Parser";
}
public Hashtable getSupportedMimeTypes() {
return SUPPORTED_MIME_TYPES;
}
public plasmaParserDocument parse(URL location, String mimeType, InputStream source) throws ParserException {
try {
StringBuffer docKeywords = new StringBuffer();
StringBuffer docShortTitle = new StringBuffer();
StringBuffer docLongTitle = new StringBuffer();
LinkedList docSections = new LinkedList();
StringBuffer docAbstrct = new StringBuffer();
serverByteBuffer docText = new serverByteBuffer();
Map docAnchors = new HashMap();
TreeSet docImages = new TreeSet();
// creating a new parser class to parse the unzipped content
plasmaParser theParser = new plasmaParser();
// looping through the contained files
ZipEntry entry;
ZipInputStream zippedContent = new ZipInputStream(source);
while ((entry = zippedContent.getNextEntry()) !=null) {
if (entry.isDirectory()) continue;
// Get the entry name
String entryName = entry.getName();
int idx = entryName.lastIndexOf(".");
String entryExt = (idx > -1) ? entryName.substring(idx+1) : null;
// trying to determine the mimeType per file extension
String entryMime = plasmaParser.getMimeTypeByFileExt(entryExt);
// getting the entry content
ByteArrayOutputStream bos = new ByteArrayOutputStream();
byte[] buf = new byte[(int) entry.getSize()];
/*int bytesRead =*/ zippedContent.read(buf);
bos.write(buf);
byte[] ut = bos.toByteArray();
// parsing the content
plasmaParserDocument theDoc = theParser.parseSource(location,entryMime,ut);
if (theDoc == null) continue;
// merging all documents together
if (docKeywords.length() > 0) docKeywords.append("\n");
docKeywords.append(theDoc.getKeywords());
if (docLongTitle.length() > 0) docLongTitle.append("\n");
docLongTitle.append(theDoc.getMainLongTitle());
if (docShortTitle.length() > 0) docShortTitle.append("\n");
docShortTitle.append(theDoc.getMainShortTitle());
docSections.addAll(Arrays.asList(theDoc.getSectionTitles()));
if (docAbstrct.length() > 0) docAbstrct.append("\n");
docAbstrct.append(theDoc.getAbstract());
if (docText.length() > 0) docText.append("\n");
docText.append(theDoc.getText());
docAnchors.putAll(theDoc.getAnchors());
docImages.addAll(theDoc.getImages());
}
/* (URL location, String mimeType,
String keywords, String shortTitle, String longTitle,
String[] sections, String abstrct,
byte[] text, Map anchors, Map images)
*/
return new plasmaParserDocument(
location,
mimeType,
docKeywords.toString(),
docShortTitle.toString(),
docLongTitle.toString(),
(String[])docSections.toArray(new String[docSections.size()]),
docAbstrct.toString(),
docText.toByteArray(),
docAnchors,
docImages);
} catch (Exception e) {
throw new ParserException("Unable to parse the zip content. " + e.getMessage());
} catch (Error e) {
throw new ParserException("Unable to parse the zip content. " + e.getMessage());
}
}
public void reset() {
// Nothing todo here at the moment
}
}