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251 lines
10 KiB
251 lines
10 KiB
//odtParser.java
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//------------------------
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//part of YaCy
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//(C) by Michael Peter Christen; mc@yacy.net
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//first published on http://www.anomic.de
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//Frankfurt, Germany, 2005
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//
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//this file is contributed by Martin Thelian
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//
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// $LastChangedDate$
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// $LastChangedRevision$
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// $LastChangedBy$
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//
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//This program is free software; you can redistribute it and/or modify
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//it under the terms of the GNU General Public License as published by
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//the Free Software Foundation; either version 2 of the License, or
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//(at your option) any later version.
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//
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//This program is distributed in the hope that it will be useful,
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//but WITHOUT ANY WARRANTY; without even the implied warranty of
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//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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//GNU General Public License for more details.
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//
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//You should have received a copy of the GNU General Public License
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//along with this program; if not, write to the Free Software
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//Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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package net.yacy.document.parser;
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import java.io.File;
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import java.io.InputStream;
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import java.nio.charset.StandardCharsets;
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import java.util.ArrayList;
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import java.util.Date;
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import java.util.Enumeration;
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import java.util.HashSet;
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import java.util.List;
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import java.util.Set;
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import java.util.zip.ZipEntry;
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import java.util.zip.ZipFile;
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import javax.xml.parsers.ParserConfigurationException;
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import javax.xml.parsers.SAXParser;
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import javax.xml.parsers.SAXParserFactory;
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import net.yacy.cora.document.encoding.UTF8;
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import net.yacy.cora.document.id.DigestURL;
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import net.yacy.document.AbstractParser;
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import net.yacy.document.Document;
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import net.yacy.document.Parser;
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import net.yacy.document.VocabularyScraper;
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import net.yacy.document.parser.xml.ODContentHandler;
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import net.yacy.document.parser.xml.ODMetaHandler;
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import net.yacy.kelondro.io.CharBuffer;
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import net.yacy.kelondro.util.FileUtils;
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import org.xml.sax.SAXException;
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public class odtParser extends AbstractParser implements Parser {
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public final static int MAX_DOCSIZE = 200 * 1024 * 1024;
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public odtParser() {
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super("OASIS OpenDocument V2 Text Document Parser");
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this.SUPPORTED_EXTENSIONS.add("odt");
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this.SUPPORTED_EXTENSIONS.add("ods");
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this.SUPPORTED_EXTENSIONS.add("odp");
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this.SUPPORTED_EXTENSIONS.add("odg");
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this.SUPPORTED_EXTENSIONS.add("odc");
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this.SUPPORTED_EXTENSIONS.add("odf");
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this.SUPPORTED_EXTENSIONS.add("odb");
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this.SUPPORTED_EXTENSIONS.add("odi");
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this.SUPPORTED_EXTENSIONS.add("odm");
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this.SUPPORTED_EXTENSIONS.add("ott");
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this.SUPPORTED_EXTENSIONS.add("ots");
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this.SUPPORTED_EXTENSIONS.add("otp");
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this.SUPPORTED_EXTENSIONS.add("otg");
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this.SUPPORTED_EXTENSIONS.add("sxw"); // Star Office Writer file format
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this.SUPPORTED_EXTENSIONS.add("sxc"); // Star Office Calc file format
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this.SUPPORTED_MIME_TYPES.add("application/vnd.oasis.opendocument.text");
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this.SUPPORTED_MIME_TYPES.add("application/vnd.oasis.opendocument.spreadsheet");
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this.SUPPORTED_MIME_TYPES.add("application/vnd.oasis.opendocument.presentation");
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this.SUPPORTED_MIME_TYPES.add("application/vnd.oasis.opendocument.graphics");
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this.SUPPORTED_MIME_TYPES.add("application/vnd.oasis.opendocument.chart");
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this.SUPPORTED_MIME_TYPES.add("application/vnd.oasis.opendocument.formula");
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this.SUPPORTED_MIME_TYPES.add("application/vnd.oasis.opendocument.database");
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this.SUPPORTED_MIME_TYPES.add("application/vnd.oasis.opendocument.image");
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this.SUPPORTED_MIME_TYPES.add("application/vnd.oasis.opendocument.text-master");
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this.SUPPORTED_MIME_TYPES.add("application/vnd.oasis.opendocument.text-template");
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this.SUPPORTED_MIME_TYPES.add("application/vnd.oasis.opendocument.spreadsheet-template");
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this.SUPPORTED_MIME_TYPES.add("application/vnd.oasis.opendocument.presentation-template");
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this.SUPPORTED_MIME_TYPES.add("application/vnd.oasis.opendocument.graphics-template");
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this.SUPPORTED_MIME_TYPES.add("application/x-vnd.oasis.opendocument.text");
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this.SUPPORTED_MIME_TYPES.add("application/OOo-calc");
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this.SUPPORTED_MIME_TYPES.add("application/OOo-writer");
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}
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private static final ThreadLocal<SAXParser> tlSax = new ThreadLocal<SAXParser>();
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private static SAXParser getParser() throws SAXException {
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SAXParser parser = tlSax.get();
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if (parser == null) {
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try {
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parser = SAXParserFactory.newInstance().newSAXParser();
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} catch (final ParserConfigurationException e) {
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throw new SAXException(e.getMessage(), e);
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}
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tlSax.set(parser);
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}
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return parser;
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}
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private Document[] parse(final DigestURL location, final String mimeType, @SuppressWarnings("unused") final String charset, final File dest)
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throws Parser.Failure, InterruptedException {
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CharBuffer writer = null;
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try {
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String docDescription = null;
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String docKeywordStr = null;
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String docShortTitle = null;
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String docLongTitle = null;
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String docAuthor = null;
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String docLanguage = null;
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Date docModified = null;
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// opening the file as zip file
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final ZipFile zipFile = new ZipFile(dest);
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final Enumeration<? extends ZipEntry> zipEnum = zipFile.entries();
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// looping through all containing files
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while (zipEnum.hasMoreElements()) {
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// getting the next zip file entry
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final ZipEntry zipEntry= zipEnum.nextElement();
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final String entryName = zipEntry.getName();
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// content.xml contains the document content in xml format
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if (entryName.equals("content.xml")) {
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// create a writer for output
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writer = new CharBuffer(MAX_DOCSIZE, (int) zipEntry.getSize());
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// extract data
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final InputStream zipFileEntryStream = zipFile.getInputStream(zipEntry);
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try {
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final SAXParser saxParser = getParser();
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saxParser.parse(zipFileEntryStream, new ODContentHandler(writer));
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} finally {
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// close readers and writers
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zipFileEntryStream.close();
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}
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} else if (entryName.equals("meta.xml")) {
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// meta.xml contains metadata about the document
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final InputStream zipFileEntryStream = zipFile.getInputStream(zipEntry);
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final SAXParser saxParser = getParser();
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final ODMetaHandler metaData = new ODMetaHandler();
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saxParser.parse(zipFileEntryStream, metaData);
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docDescription = metaData.getDescription();
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docKeywordStr = metaData.getKeyword();
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docShortTitle = metaData.getTitle();
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docLongTitle = metaData.getSubject();
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docAuthor = metaData.getCreator();
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docLanguage = metaData.getLanguage();
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docModified = metaData.getLastModified(); // maybe null
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}
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}
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zipFile.close(); // close zipfile (so underlaying file (temp file) can be deleted later
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// make the languages set
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final Set<String> languages = new HashSet<String>(1);
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if (docLanguage != null) languages.add(docLanguage);
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// if there is no title availabe we generate one
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if (docLongTitle == null) {
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if (docShortTitle != null) {
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docLongTitle = docShortTitle;
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}
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}
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// split the keywords
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String[] docKeywords = null;
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if (docKeywordStr != null) docKeywords = docKeywordStr.split(" |,");
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// create the parser document
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Document[] docs = null;
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final byte[] contentBytes = (writer == null) ? null : UTF8.getBytes(writer.toString());
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List<String> descriptions = new ArrayList<String>();
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if (docDescription != null && docDescription.length() > 0) descriptions.add(docDescription);
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docs = new Document[]{new Document(
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location,
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mimeType,
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StandardCharsets.UTF_8.name(),
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this,
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languages,
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docKeywords,
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singleList(docLongTitle),
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docAuthor,
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"",
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null,
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descriptions,
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0.0d, 0.0d,
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contentBytes,
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null,
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null,
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null,
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false,
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docModified
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)};
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return docs;
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} catch (final Exception e) {
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if (e instanceof InterruptedException) throw (InterruptedException) e;
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if (e instanceof Parser.Failure) throw (Parser.Failure) e;
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// close the writer
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if (writer != null) try { writer.close(); } catch (final Exception ex) {/* ignore this */}
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throw new Parser.Failure("Unexpected error while parsing odt file. " + e.getMessage(),location);
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}
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}
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@Override
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public Document[] parse(
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final DigestURL location,
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final String mimeType,
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final String charset,
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final VocabularyScraper scraper,
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final int timezoneOffset,
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final InputStream source) throws Parser.Failure, InterruptedException {
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File dest = null;
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try {
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// creating a tempfile
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dest = File.createTempFile("OpenDocument", ".odt");
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// copying the stream into a file
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FileUtils.copy(source, dest);
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// parsing the content
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return parse(location, mimeType, charset, dest);
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} catch (final Exception e) {
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if (e instanceof InterruptedException) throw (InterruptedException) e;
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if (e instanceof Parser.Failure) throw (Parser.Failure) e;
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throw new Parser.Failure("Unexpected error while parsing odt file. " + e.getMessage(),location);
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} finally {
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if (dest != null) FileUtils.deletedelete(dest);
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}
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}
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}
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