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b5ac29c9a5
given css class and extends a given vocabulary with a term consisting with the text content of the html class tag. Additionally, the term is included into the semantic facet of the document. This allows the creation of faceted search to documents without the pre-creation of vocabularies; instead, the vocabulary is created on-the-fly, possibly for use in other crawls. If any of the term scraping for a specific vocabulary is successful on a document, this vocabulary is excluded for auto-annotation on the page. To use this feature, do the following: - create a vocabulary on /Vocabulary_p.html (if not existent) - in /CrawlStartExpert.html you will now see the vocabularies as column in a table. The second column provides text fields where you can name the class of html entities where the literal of the corresponding vocabulary shall be scraped out - when doing a search, you will see the content of the scraped fields in a navigation facet for the given vocabulary
184 lines
7.3 KiB
Java
184 lines
7.3 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 java.util.Date;
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import net.yacy.cora.document.id.AnchorURL;
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import net.yacy.cora.document.id.DigestURL;
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import net.yacy.cora.util.ConcurrentLog;
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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.document.VocabularyScraper;
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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 AnchorURL location, final String mimeType,
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final String charset, final VocabularyScraper scraper, 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 DigestURL location, final String mimeType,
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@SuppressWarnings("unused") 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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singleList(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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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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new Date())};
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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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ConcurrentLog.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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