/**
* 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 org.apache.lucene.analysis.TokenFilter;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.tokenattributes.CharTermAttribute;
/**
* Filter that removes the trailing slash of the URI token.
*/
public class URITrailingSlashFilter extends TokenFilter {
private final CharTermAttribute termAtt;
public URITrailingSlashFilter(final TokenStream in) {
super(in);
termAtt = this.addAttribute(CharTermAttribute.class);
}
@Override
public final boolean incrementToken() throws IOException {
if (!input.incrementToken()) {
return false;
}
final int bufferLength = termAtt.length();
// Remove trailing slash
if (termAtt.buffer()[bufferLength - 1] == '/') {
// Strip last character off
termAtt.setLength(bufferLength - 1);
}
return true;
}
}