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First version of a MS Excel parser based on Apache POI

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(event based parsing)

git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@2801 6c8d7289-2bf4-0310-a012-ef5d649a1542
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octoate 18 years ago
parent db6281c1d4
commit cc24dde5e0
2 changed files with 264 additions and 0 deletions
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66
source/de/anomic/plasma/parser/xls/build.xml
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<?xml version="1.0"?>
<project name="YACY - xlsParser" default="dist">
<description>A class to parse ppt files</description>
<!-- the parsers short name -->
<property name="parserShortName" value="xls"/>
<!-- parser version number -->
<property name="parserVersion" value="0.1"/>
<property name="parserLongName" value="yacyContentParser_${parserShortName}"/>
<property name="parserArchive" location="${release}/${parserLongName}_${parserVersion}.tgz"/>
<!-- compile the sources of this parser -->
<target name="compile">
<javac srcdir="${src}/de/anomic/plasma/parser/${parserShortName}" destdir="${build}" source="${javacSource}" target="${javacTarget}" debug="true" debuglevel="lines,vars,source">
<classpath>
<pathelement location="${build}" />
<!-- libraries needed by this parser -->
<pathelement location="${libx}/poi-3.0-alpha2-20060616.jar" />
<pathelement location="${libx}/poi-scratchpad-3.0-alpha2-20060616.jar" />
</classpath>
</javac>
</target>
<!-- add all parts of this parser into a single zip file -->
<target name="zip" depends="compile">
<tar destfile="${parserArchive}" compression="gzip">
<!-- needed libraries and license files of these libs -->
<tarfileset dir="${libx}"
includes="poi-*.*"
prefix="${releaseFileParentDir}/libx/"
dirmode="755" mode="644"/>
<!-- source files of this parser -->
<tarfileset dir="${src}/de/anomic/plasma/parser/${parserShortName}"
prefix="${releaseFileParentDir}/source/de/anomic/plasma/parser/${parserShortName}"
dirmode="755" mode="644"/>
<!-- class files of this parser -->
<tarfileset dir="${build}/de/anomic/plasma/parser/${parserShortName}"
prefix="${releaseFileParentDir}/classes/de/anomic/plasma/parser/${parserShortName}"
dirmode="755" mode="644"/>
</tar>
</target>
<!-- just copy all parts of this parser into the release directory -->
<target name="copy" depends="compile">
<!-- copy needed libs -->
<copy todir="${release}/libx/">
<fileset dir="${libx}" includes="poi-*.*"/>
</copy>
<!-- copy source code files -->
<copy todir="${release}/source/de/anomic/plasma/parser/${parserShortName}">
<fileset dir="${src}/de/anomic/plasma/parser/${parserShortName}" includes="**/*"/>
</copy>
<!-- copy compiled classes -->
<copy todir="${release}/classes/de/anomic/plasma/parser/${parserShortName}">
<fileset dir="${build}/de/anomic/plasma/parser/${parserShortName}" includes="**/*"/>
</copy>
</target>
<target name="dist" depends="compile,zip" description="Compile and zip the parser"/>
</project>

198
source/de/anomic/plasma/parser/xls/xlsParser.java
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//xlsParser.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 Tim Riemann
//last major change: 12.09.2006
//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.xls;
import java.io.InputStream;
import java.util.Hashtable;
import org.apache.poi.hssf.eventusermodel.HSSFEventFactory;
import org.apache.poi.hssf.eventusermodel.HSSFListener;
import org.apache.poi.hssf.eventusermodel.HSSFRequest;
import org.apache.poi.hssf.record.LabelSSTRecord;
import org.apache.poi.hssf.record.NumberRecord;
import org.apache.poi.hssf.record.Record;
import org.apache.poi.hssf.record.SSTRecord;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;
import de.anomic.net.URL;
import de.anomic.plasma.plasmaParserDocument;
import de.anomic.plasma.parser.AbstractParser;
import de.anomic.plasma.parser.Parser;
import de.anomic.plasma.parser.ParserException;
public class xlsParser extends AbstractParser implements Parser, HSSFListener {
//StringBuffer which contains the found strings after parsing the XLS file
private StringBuffer sbFoundStrings = new StringBuffer();
//sstrecord needed for event parsing
private SSTRecord sstrec;
/**
* 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/msexcel","xls");
SUPPORTED_MIME_TYPES.put("application/excel","xls");
SUPPORTED_MIME_TYPES.put("application/vnd.ms-excel","xls");
SUPPORTED_MIME_TYPES.put("application/x-excel","xls");
SUPPORTED_MIME_TYPES.put("application/x-msexcel","xls");
}
/**
* a list of library names that are needed by this parser
* @see Parser#getLibxDependences()
*/
private static final String[] LIBX_DEPENDENCIES = new String[] {
"poi-3.0-alpha2-20060616.jar",
"poi-scratchpad-3.0-alpha2-20060616.jar",
};
public xlsParser(){
super(LIBX_DEPENDENCIES);
this.parserName = "Microsoft Excel Parser";
this.parserVersionNr = "0.1";
}
/*
* parses the source documents and returns a plasmaParserDocument containing
* all extracted information about the parsed document
*/
public plasmaParserDocument parse(URL location, String mimeType,
String charset, InputStream source) throws ParserException,
InterruptedException {
try {
//create a new org.apache.poi.poifs.filesystem.Filesystem
POIFSFileSystem poifs = new POIFSFileSystem(source);
//get the Workbook (excel part) stream in a InputStream
InputStream din = poifs.createDocumentInputStream("Workbook");
//construct out HSSFRequest object
HSSFRequest req = new HSSFRequest();
//lazy listen for ALL records with the listener shown above
req.addListenerForAllRecords(this);
//create our event factory
HSSFEventFactory factory = new HSSFEventFactory();
//process our events based on the document input stream
factory.processEvents(req, din);
//close our document input stream (don't want to leak these!)
din.close();
//now the parsed strings are in the StringBuffer, now convert them to a String
String contents = sbFoundStrings.toString();
/*
* create the plasmaParserDocument for the database
* and set shortText and bodyText properly
*/
plasmaParserDocument theDoc = new plasmaParserDocument(
location,
mimeType,
"UTF-8",
null,
((contents.length() > 80) ? contents.substring(0, 80) : contents.trim()).
replaceAll("\r\n"," ").
replaceAll("\n"," ").
replaceAll("\r"," ").
replaceAll("\t"," "),
null,
null,
null,
contents.getBytes("UTF-8"),
null,
null);
return theDoc;
} catch (Exception e) {
if (e instanceof InterruptedException) throw (InterruptedException) e;
/*
* an unexpected error occurred, log it and throw a ParserException
*/
String errorMsg = "Unable to parse the xls document '" + location + "':" + e.getMessage();
this.theLogger.logSevere(errorMsg);
throw new ParserException(errorMsg, location);
}
}
public Hashtable getSupportedMimeTypes() {
return SUPPORTED_MIME_TYPES;
}
public void reset(){
//nothing to do
super.reset();
}
public void processRecord(Record record) {
switch (record.getSid()){
case NumberRecord.sid: {
NumberRecord numrec = (NumberRecord) record;
sbFoundStrings.append(numrec.getValue());
break;
}
//unique string records
case SSTRecord.sid: {
sstrec = (SSTRecord)record;
for (int k = 0; k < sstrec.getNumUniqueStrings(); k++){
sbFoundStrings.append( sstrec.getString(k) );
//add line seperator
sbFoundStrings.append( "\n" );
}
break;
}
case LabelSSTRecord.sid: {
LabelSSTRecord lsrec = (LabelSSTRecord)record;
sbFoundStrings.append( sstrec.getString(lsrec.getSSTIndex()) );
break;
}
}
//add line seperator
sbFoundStrings.append( "\n" );
}
}
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