/**
* Copyright 2014 National University of Ireland, Galway.
*
* This file is part of the SIREn project. Project and contact information:
*
* https://github.com/rdelbru/SIREn
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.sindice.siren.analysis.filter;
import java.io.IOException;
import java.util.HashSet;
import java.util.Set;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.tokenattributes.TypeAttribute;
import org.apache.lucene.analysis.util.FilteringTokenFilter;
import org.sindice.siren.analysis.TupleTokenizer;
/**
* Filter out tokens with a given type.
*/
@Deprecated
public class TokenTypeFilter extends FilteringTokenFilter {
protected Set<String> stopTokenTypes;
private final TypeAttribute typeAtt = this.addAttribute(TypeAttribute.class);
public TokenTypeFilter(final TokenStream input, final int[] stopTokenTypes) {
super(true, input);
this.stopTokenTypes = new HashSet<String>(stopTokenTypes.length);
for (final int type : stopTokenTypes) {
this.stopTokenTypes.add(TupleTokenizer.getTokenTypes()[type]);
}
}
@Override
protected boolean accept() throws IOException {
if (stopTokenTypes.contains(typeAtt.type())) {
return false;
}
return true;
}
}