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169 lines
6.7 KiB
169 lines
6.7 KiB
//AbstractParser.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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//
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//this file was contributed by Martin Thelian
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//last major change: $LastChangedDate$ by $LastChangedBy$
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//Revision: $LastChangedRevision$
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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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//
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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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//
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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;
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import java.io.BufferedInputStream;
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import java.io.ByteArrayInputStream;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileNotFoundException;
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import java.io.InputStream;
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import java.net.URL;
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import de.anomic.plasma.plasmaParserDocument;
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import de.anomic.server.logging.serverLog;
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/**
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* New classes implementing the {@link de.anomic.plasma.parser.Parser} interface
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* can extend this class to inherit all functions already implemented in this class.
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* @author Martin Thelian
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* @version $LastChangedRevision$ / $LastChangedDate$
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*/
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public abstract class AbstractParser implements Parser{
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/**
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* a list of library names that are needed by this parser
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*/
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protected String[] libxDependencies = null;
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/**
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* the logger class that should be used by the parser module for logging
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* purposes.
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*/
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protected serverLog theLogger = null;
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/**
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* The Constructor of this class.
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*/
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public AbstractParser(String[] libxDependencies) {
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super();
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this.libxDependencies = libxDependencies;
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}
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/**
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* Parsing a document available as byte array.
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* @param location the origin of the document
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* @param mimeType the mimetype of the document
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* @param source the content byte array
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* @return a {@link plasmaParserDocument} containing the extracted plain text of the document
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* and some additional metadata.
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* @throws ParserException if the content could not be parsed properly
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*
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* @see de.anomic.plasma.parser.Parser#parse(java.net.URL, java.lang.String, byte[])
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*/
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public plasmaParserDocument parse(
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URL location,
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String mimeType,
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byte[] source
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) throws ParserException {
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ByteArrayInputStream contentInputStream = null;
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try {
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contentInputStream = new ByteArrayInputStream(source);
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return this.parse(location,mimeType,contentInputStream);
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} finally {
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if (contentInputStream != null) {
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try {
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contentInputStream.close();
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contentInputStream = null;
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} catch (Exception e){}
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}
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}
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}
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/**
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* Parsing a document stored in a {@link File}
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* @param location the origin of the document
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* @param mimeType the mimetype of the document
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* @param sourceFile the file containing the content of the document
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* @return a {@link plasmaParserDocument} containing the extracted plain text of the document
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* and some additional metadata.
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* @throws ParserException if the content could not be parsed properly
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*
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* @see de.anomic.plasma.parser.Parser#parse(java.net.URL, java.lang.String, java.io.File)
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*/
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public plasmaParserDocument parse(URL location, String mimeType,
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File sourceFile) throws ParserException {
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BufferedInputStream contentInputStream = null;
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try {
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contentInputStream = new BufferedInputStream(new FileInputStream(sourceFile));
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return this.parse(location, mimeType, contentInputStream);
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} catch (FileNotFoundException e) {
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throw new ParserException(e.getMessage());
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} finally {
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if (contentInputStream != null) try{contentInputStream.close();}catch(Exception e){}
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}
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}
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/**
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* Parsing a document available as {@link InputStream}
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* @param location the origin of the document
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* @param mimeType the mimetype of the document
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* @param source the {@link InputStream} containing the document content
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* @return a {@link plasmaParserDocument} containing the extracted plain text of the document
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* and some additional metadata.
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* @throws ParserException if the content could not be parsed properly
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*
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* @see de.anomic.plasma.parser.Parser#parse(java.net.URL, java.lang.String, java.io.InputStream)
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*/
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public abstract plasmaParserDocument parse(URL location, String mimeType,
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InputStream source) throws ParserException;
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/**
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* @return Returns a list of library names that are needed by this parser
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* @see de.anomic.plasma.parser.Parser#getLibxDependences()
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*/
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public String[] getLibxDependences() {
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return this.libxDependencies;
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}
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/**
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* Setting the logger that should be used by this parser class ...
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*/
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public void setLogger(serverLog log) {
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this.theLogger = log;
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}
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}
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