/**
* License Agreement for OpenSearchServer
*
* Copyright (C) 2012 Emmanuel Keller / Jaeksoft
*
* http://www.open-search-server.com
*
* This file is part of OpenSearchServer.
*
* OpenSearchServer 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 3 of the License, or
* (at your option) any later version.
*
* OpenSearchServer 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 OpenSearchServer.
* If not, see <http://www.gnu.org/licenses/>.
**/
package com.jaeksoft.searchlib.analysis.filter;
import org.apache.lucene.analysis.TokenStream;
import com.jaeksoft.searchlib.SearchLibException;
import com.jaeksoft.searchlib.analysis.ClassPropertyEnum;
import com.jaeksoft.searchlib.analysis.FilterFactory;
import com.jaeksoft.searchlib.analysis.filter.stop.PrefixArray;
import com.jaeksoft.searchlib.analysis.filter.stop.PrefixSuffixFilter;
import com.jaeksoft.searchlib.analysis.filter.stop.SuffixArray;
import com.jaeksoft.searchlib.analysis.stopwords.StopWordsManager;
public class PrefixSuffixStopFilter extends FilterFactory {
private String prefixList = null;
private String suffixList = null;
private String tokenSeparator = null;
private boolean ignoreCase = false;
private StopWordsManager stopWordsManager = null;
@Override
public void initProperties() throws SearchLibException {
super.initProperties();
String[] values = config.getStopWordsManager().getList(true);
String value = (values != null && values.length > 0) ? values[0] : null;
addProperty(ClassPropertyEnum.TOKEN_SEPARATOR, " ", null, 5, 1);
addProperty(ClassPropertyEnum.IGNORE_CASE, Boolean.FALSE.toString(),
ClassPropertyEnum.BOOLEAN_LIST, 0, 0);
addProperty(ClassPropertyEnum.PREFIX_FILE_LIST, value, values, 0, 0);
addProperty(ClassPropertyEnum.SUFFIX_FILE_LIST, value, values, 0, 0);
stopWordsManager = config.getStopWordsManager();
}
@Override
public void checkValue(ClassPropertyEnum prop, String value)
throws SearchLibException {
if (value == null || value.length() == 0)
return;
if (prop == ClassPropertyEnum.PREFIX_FILE_LIST)
prefixList = value;
else if (prop == ClassPropertyEnum.SUFFIX_FILE_LIST)
suffixList = value;
else if (prop == ClassPropertyEnum.TOKEN_SEPARATOR)
tokenSeparator = value;
else if (prop == ClassPropertyEnum.IGNORE_CASE)
ignoreCase = Boolean.parseBoolean(value);
}
@Override
public TokenStream create(TokenStream tokenStream) {
PrefixArray prefixArray = null;
SuffixArray suffixArray = null;
if (prefixList != null && prefixList.length() > 0)
prefixArray = stopWordsManager.getPrefixArray(prefixList,
tokenSeparator, ignoreCase);
if (suffixList != null && suffixList.length() > 0)
suffixArray = stopWordsManager.getSuffixArray(suffixList,
tokenSeparator, ignoreCase);
return new PrefixSuffixFilter(tokenStream, prefixArray, suffixArray,
ignoreCase);
}
}