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//pptParser.java
//------------------------
//part of YaCy
//(C) by Michael Peter Christen; mc@yacy.net
//first published on http://www.anomic.de
//Frankfurt, Germany, 2005
//
//this file is contributed by Tim Riemann
//
// $LastChangedDate$
// $LastChangedRevision$
// $LastChangedBy$
//
//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
package net.yacy.document.parser;
import java.io.BufferedInputStream;
import java.io.InputStream;
import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
import java.util.List;
import net.yacy.cora.document.id.DigestURL;
import net.yacy.cora.util.CommonPattern;
import net.yacy.cora.util.ConcurrentLog;
import net.yacy.document.AbstractParser;
import net.yacy.document.Document;
import net.yacy.document.Parser;
import net.yacy.document.VocabularyScraper;
import org.apache.poi.hslf.extractor.PowerPointExtractor;
public class pptParser extends AbstractParser implements Parser {
public pptParser(){
super("Microsoft Powerpoint Parser");
this.SUPPORTED_EXTENSIONS.add("ppt");
this.SUPPORTED_EXTENSIONS.add("pps");
this.SUPPORTED_MIME_TYPES.add("application/mspowerpoint");
this.SUPPORTED_MIME_TYPES.add("application/powerpoint");
this.SUPPORTED_MIME_TYPES.add("application/vnd.ms-powerpoint");
this.SUPPORTED_MIME_TYPES.add("application/ms-powerpoint");
this.SUPPORTED_MIME_TYPES.add("application/mspowerpnt");
this.SUPPORTED_MIME_TYPES.add("application/vnd-mspowerpoint");
this.SUPPORTED_MIME_TYPES.add("application/x-powerpoint");
this.SUPPORTED_MIME_TYPES.add("application/x-m");
}
/*
* parses the source documents and returns a plasmaParserDocument containing
* all extracted information about the parsed document
*/
@Override
public Document[] parse(
final DigestURL location,
final String mimeType,
final String charset,
final VocabularyScraper scraper,
final int timezoneOffset,
final InputStream source) throws Parser.Failure,
InterruptedException {
try {
/*
* create new PowerPointExtractor and extract text and notes
* of the document
*/
final PowerPointExtractor pptExtractor = new PowerPointExtractor(new BufferedInputStream(source));
final String contents = pptExtractor.getText(true, true).trim();
String title = contents.replaceAll("\r"," ").replaceAll("\n"," ").replaceAll("\t"," ").trim();
if (title.length() > 80) title = title.substring(0, 80);
int l = title.length();
while (true) {
title = title.replaceAll(" ", " ");
if (title.length() == l) break;
l = title.length();
}
// get keywords (for yacy as array)
final String keywords = pptExtractor.getSummaryInformation().getKeywords();
final String[] keywlist;
if (keywords != null && !keywords.isEmpty()) {
keywlist = CommonPattern.COMMA.split(keywords);
} else keywlist = null;
final String subject = pptExtractor.getSummaryInformation().getSubject();
List<String> descriptions = new ArrayList<String>();
if (subject != null && !subject.isEmpty()) descriptions.add(subject);
/*
* create the plasmaParserDocument for the database
* and set shortText and bodyText properly
*/
final Document[] docs = new Document[]{new Document(
location,
mimeType,
StandardCharsets.UTF_8.name(),
this,
null,
keywlist,
singleList(title),
pptExtractor.getSummaryInformation().getAuthor(), // may be null
pptExtractor.getDocSummaryInformation().getCompany(),
null,
descriptions,
0.0d, 0.0d,
contents,
null,
null,
null,
false,
pptExtractor.getSummaryInformation().getLastSaveDateTime() // may be null
)};
return docs;
} catch (final Exception e) {
if (e instanceof InterruptedException) throw (InterruptedException) e;
/*
* an unexpected error occurred, log it and throw a Parser.Failure
*/
ConcurrentLog.logException(e);
final String errorMsg = "Unable to parse the ppt document '" + location + "':" + e.getMessage();
AbstractParser.log.severe(errorMsg);
throw new Parser.Failure(errorMsg, location);
}
}
}
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