mirror of
https://github.com/yacy/yacy_search_server.git
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5fc6524ca8
later - added abstract add, delete, get methods in the triplestore - added generation of triples after auto-annotation - migrated all MultiProtocolURI objects to DigestURI in the parser since the url hash is needed as subject value in the triples in the triple store
181 lines
7.1 KiB
Java
181 lines
7.1 KiB
Java
//xlsParser.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 Tim Riemann
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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.InputStream;
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import net.yacy.cora.document.UTF8;
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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.kelondro.data.meta.DigestURI;
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import net.yacy.kelondro.logging.Log;
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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.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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public class xlsParser extends AbstractParser implements Parser {
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public xlsParser(){
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super("Microsoft Excel Parser");
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this.SUPPORTED_EXTENSIONS.add("xls");
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this.SUPPORTED_EXTENSIONS.add("xla");
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this.SUPPORTED_MIME_TYPES.add("application/msexcel");
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this.SUPPORTED_MIME_TYPES.add("application/excel");
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this.SUPPORTED_MIME_TYPES.add("application/vnd.ms-excel");
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this.SUPPORTED_MIME_TYPES.add("application/x-excel");
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this.SUPPORTED_MIME_TYPES.add("application/x-msexcel");
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this.SUPPORTED_MIME_TYPES.add("application/x-ms-excel");
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this.SUPPORTED_MIME_TYPES.add("application/x-dos_ms_excel");
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this.SUPPORTED_MIME_TYPES.add("application/xls");
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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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@Override
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public Document[] parse(final DigestURI location, final String mimeType,
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final String charset, final InputStream source) throws Parser.Failure,
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InterruptedException {
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return new XLSHSSFListener().parse(location, mimeType, charset, source);
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}
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public class XLSHSSFListener implements HSSFListener {
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//StringBuilder for parsed text
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private final StringBuilder sbFoundStrings;
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public XLSHSSFListener() {
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this.sbFoundStrings = new StringBuilder(100);
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}
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/*
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* parses the source documents and returns a Document containing
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* all extracted information about the parsed document
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*/
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public Document[] parse(final DigestURI location, final String mimeType,
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final String charset, final InputStream source) throws Parser.Failure,
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InterruptedException {
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try {
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//create a new org.apache.poi.poifs.filesystem.Filesystem
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final POIFSFileSystem poifs = new POIFSFileSystem(source);
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//get the Workbook (excel part) stream in a InputStream
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final InputStream din = poifs.createDocumentInputStream("Workbook");
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//construct out HSSFRequest object
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final 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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final 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 StringBuilder, now convert them to a String
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final String contents = this.sbFoundStrings.toString().trim();
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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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return new Document[]{new Document(
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location,
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mimeType,
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"UTF-8",
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this,
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null,
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null,
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location.getFile(),
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"", // TODO: AUTHOR
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"", // TODO: publisher
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null,
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null,
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0.0f, 0.0f,
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UTF8.getBytes(contents),
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null,
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null,
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null,
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false)};
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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 Parser.Failure
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*/
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Log.logException(e);
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final String errorMsg = "Unable to parse the xls document '" + location + "':" + e.getMessage();
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throw new Parser.Failure(errorMsg, location);
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}
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}
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@Override
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public void processRecord(final Record record) {
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SSTRecord sstrec = null;
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switch (record.getSid()){
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case NumberRecord.sid: {
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final NumberRecord numrec = (NumberRecord) record;
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this.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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this.sbFoundStrings.append( sstrec.getString(k) );
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//add line seperator
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this.sbFoundStrings.append( "\n" );
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}
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break;
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}
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/*
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case LabelSSTRecord.sid: {
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final 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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}
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//add line seperator
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this.sbFoundStrings.append( "\n" );
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}
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}
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}
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