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204 lines
8.1 KiB
204 lines
8.1 KiB
//xlsParser.java
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//------------------------
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//part of YaCy
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//(C) by Michael Peter Christen; mc@anomic.de
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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: 12.09.2006
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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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//Using this software in any meaning (reading, learning, copying, compiling,
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//running) means that you agree that the Author(s) is (are) not responsible
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//for cost, loss of data or any harm that may be caused directly or indirectly
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//by usage of this softare or this documentation. The usage of this software
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//is on your own risk. The installation and usage (starting/running) of this
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//software may allow other people or application to access your computer and
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//any attached devices and is highly dependent on the configuration of the
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//software which must be done by the user of the software; the author(s) is
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//(are) also not responsible for proper configuration and usage of the
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//software, even if provoked by documentation provided together with
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//the software.
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//Any changes to this file according to the GPL as documented in the file
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//gpl.txt aside this file in the shipment you received can be done to the
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//lines that follows this copyright notice here, but changes must not be
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//done inside the copyright notive above. A re-distribution must contain
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//the intact and unchanged copyright notice.
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//Contributions and changes to the program code must be marked as such.
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package de.anomic.plasma.parser.xls;
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import java.io.InputStream;
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import java.util.Hashtable;
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import org.apache.poi.hssf.eventusermodel.HSSFEventFactory;
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import org.apache.poi.hssf.eventusermodel.HSSFListener;
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import org.apache.poi.hssf.eventusermodel.HSSFRequest;
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import org.apache.poi.hssf.record.LabelSSTRecord;
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import org.apache.poi.hssf.record.NumberRecord;
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import org.apache.poi.hssf.record.Record;
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import org.apache.poi.hssf.record.SSTRecord;
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import org.apache.poi.poifs.filesystem.POIFSFileSystem;
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import de.anomic.net.URL;
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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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public class xlsParser extends AbstractParser implements Parser, HSSFListener {
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//StringBuffer for parsed text
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private StringBuffer sbFoundStrings = null;
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//sstrecord needed for event parsing
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private SSTRecord sstrec;
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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 SUPPORTED_MIME_TYPES = new Hashtable();
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static {
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SUPPORTED_MIME_TYPES.put("application/msexcel","xls");
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SUPPORTED_MIME_TYPES.put("application/excel","xls");
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SUPPORTED_MIME_TYPES.put("application/vnd.ms-excel","xls");
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SUPPORTED_MIME_TYPES.put("application/x-excel","xls");
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SUPPORTED_MIME_TYPES.put("application/x-msexcel","xls");
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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 xlsParser(){
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super(LIBX_DEPENDENCIES);
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this.parserName = "Microsoft Excel 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(URL location, String mimeType,
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String charset, InputStream source) throws ParserException,
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InterruptedException {
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try {
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//generate new StringBuffer for parsing
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sbFoundStrings = new StringBuffer();
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//create a new org.apache.poi.poifs.filesystem.Filesystem
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POIFSFileSystem poifs = new POIFSFileSystem(source);
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//get the Workbook (excel part) stream in a InputStream
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InputStream din = poifs.createDocumentInputStream("Workbook");
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//construct out HSSFRequest object
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HSSFRequest req = new HSSFRequest();
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//lazy listen for ALL records with the listener shown above
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req.addListenerForAllRecords(this);
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//create our event factory
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HSSFEventFactory factory = new HSSFEventFactory();
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//process our events based on the document input stream
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factory.processEvents(req, din);
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//close our document input stream (don't want to leak these!)
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din.close();
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//now the parsed strings are in the StringBuffer, now convert them to a String
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String contents = sbFoundStrings.toString();
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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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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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((contents.length() > 80) ? contents.substring(0, 80) : contents.trim()).
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replaceAll("\r\n"," ").
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replaceAll("\n"," ").
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replaceAll("\r"," ").
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replaceAll("\t"," "),
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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 (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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String errorMsg = "Unable to parse the xls 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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} finally {
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sbFoundStrings = null;
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}
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}
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public Hashtable 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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public void processRecord(Record record) {
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switch (record.getSid()){
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case NumberRecord.sid: {
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NumberRecord numrec = (NumberRecord) record;
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sbFoundStrings.append(numrec.getValue());
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break;
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}
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//unique string records
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case SSTRecord.sid: {
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sstrec = (SSTRecord)record;
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for (int k = 0; k < sstrec.getNumUniqueStrings(); k++){
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sbFoundStrings.append( sstrec.getString(k) );
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//add line seperator
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sbFoundStrings.append( "\n" );
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}
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break;
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}
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case LabelSSTRecord.sid: {
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LabelSSTRecord lsrec = (LabelSSTRecord)record;
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sbFoundStrings.append( sstrec.getString(lsrec.getSSTIndex()) );
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break;
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}
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}
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//add line seperator
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sbFoundStrings.append( "\n" );
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}
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}
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