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129 lines
4.7 KiB
129 lines
4.7 KiB
//pptParser.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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//this file is contributed by Tim Riemann
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//last major change: 10.09.2006
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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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//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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//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 de.anomic.plasma.parser.ppt;
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import java.io.BufferedInputStream;
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import java.io.InputStream;
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import java.util.Hashtable;
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import org.apache.poi.hslf.extractor.PowerPointExtractor;
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import de.anomic.plasma.plasmaParserDocument;
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import de.anomic.plasma.parser.AbstractParser;
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import de.anomic.plasma.parser.Parser;
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import de.anomic.plasma.parser.ParserException;
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import de.anomic.yacy.yacyURL;
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public class pptParser extends AbstractParser implements Parser {
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/**
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* a list of mime types that are supported by this parser class
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* @see #getSupportedMimeTypes()
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*/
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public static final Hashtable<String, String> SUPPORTED_MIME_TYPES = new Hashtable<String, String>();
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static {
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SUPPORTED_MIME_TYPES.put("application/mspowerpoint","ppt,pps");
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SUPPORTED_MIME_TYPES.put("application/powerpoint","ppt,pps");
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SUPPORTED_MIME_TYPES.put("application/vnd.ms-powerpoint","ppt,pps");
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}
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/**
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* a list of library names that are needed by this parser
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* @see Parser#getLibxDependences()
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*/
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private static final String[] LIBX_DEPENDENCIES = new String[] {
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"poi-3.0-alpha2-20060616.jar",
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"poi-scratchpad-3.0-alpha2-20060616.jar"
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};
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public pptParser(){
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super(LIBX_DEPENDENCIES);
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this.parserName = "Microsoft Powerpoint Parser";
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this.parserVersionNr = "0.1";
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}
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/*
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* parses the source documents and returns a plasmaParserDocument containing
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* all extracted information about the parsed document
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*/
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public plasmaParserDocument parse(final yacyURL location, final String mimeType,
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final String charset, final InputStream source) throws ParserException,
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InterruptedException {
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try {
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/*
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* create new PowerPointExtractor and extract text and notes
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* of the document
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*/
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final PowerPointExtractor pptExtractor = new PowerPointExtractor(new BufferedInputStream(source));
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final String contents = pptExtractor.getText(true, true).trim();
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String title = contents.replaceAll("\r"," ").replaceAll("\n"," ").replaceAll("\t"," ").trim();
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if (title.length() > 80) title = title.substring(0, 80);
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int l = title.length();
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while (true) {
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title = title.replaceAll(" ", " ");
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if (title.length() == l) break;
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l = title.length();
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}
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/*
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* create the plasmaParserDocument for the database
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* and set shortText and bodyText properly
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*/
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final plasmaParserDocument theDoc = new plasmaParserDocument(
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location,
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mimeType,
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"UTF-8",
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null,
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null,
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title,
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"", // TODO: AUTHOR
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null,
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null,
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contents.getBytes("UTF-8"),
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null,
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null);
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return theDoc;
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} catch (final Exception e) {
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if (e instanceof InterruptedException) throw (InterruptedException) e;
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/*
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* an unexpected error occurred, log it and throw a ParserException
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*/
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final String errorMsg = "Unable to parse the ppt document '" + location + "':" + e.getMessage();
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this.theLogger.logSevere(errorMsg);
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throw new ParserException(errorMsg, location);
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}
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}
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public Hashtable<String, String> getSupportedMimeTypes() {
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return SUPPORTED_MIME_TYPES;
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}
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public void reset(){
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//nothing to do
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super.reset();
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}
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}
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