/**
* License Agreement for OpenSearchServer
*
* Copyright (C) 2013 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 java.io.IOException;
import org.apache.lucene.analysis.TokenStream;
import com.jaeksoft.searchlib.SearchLibException;
import com.jaeksoft.searchlib.analysis.ClassPropertyEnum;
import com.jaeksoft.searchlib.analysis.FilterFactory;
public class RemoveTokenTypeFilter extends FilterFactory {
private String type = null;
@Override
public void initProperties() throws SearchLibException {
super.initProperties();
addProperty(ClassPropertyEnum.TOKEN_TYPE, "shingle", null, 20, 0);
}
@Override
public void checkValue(ClassPropertyEnum prop, String value)
throws SearchLibException {
if (prop == ClassPropertyEnum.TOKEN_TYPE)
type = value;
}
@Override
public TokenStream create(TokenStream tokenStream) {
return new RemoveTokenTypeTokenFilter(tokenStream, type);
}
public class RemoveTokenTypeTokenFilter extends AbstractTermFilter {
private final String type;
public RemoveTokenTypeTokenFilter(TokenStream input, String type) {
super(input);
this.type = type;
}
@Override
public final boolean incrementToken() throws IOException {
int skippedPositions = 0;
for (;;) {
if (!input.incrementToken())
return false;
if (!type.equals(typeAtt.type())) {
posIncrAtt.setPositionIncrement(posIncrAtt
.getPositionIncrement() + skippedPositions);
return true;
}
skippedPositions += posIncrAtt.getPositionIncrement();
}
}
}
}