/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2010, Red Hat, Inc. and/or its affiliates or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors. All third-party contributions are
* distributed under license by Red Hat, Inc.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program 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 Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
package org.hibernate.search.util.impl;
import java.io.Reader;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.CharTokenizer;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.util.Version;
/**
* Analyzer that applies no operation whatsoever to the flux
* This is useful for queries operating on non tokenized fields.
* <p/>
* TODO there is probably a way to make that much more efficient by
* reimplementing TokenStream to take the Reader and pass through the flux as a single token
*
* @author Emmanuel Bernard
*/
public final class PassThroughAnalyzer extends Analyzer {
private final Version luceneVersion;
/**
* Create a new PassThroughAnalyzer.
*
* @param luceneVersion
*/
public PassThroughAnalyzer(Version luceneVersion) {
this.luceneVersion = luceneVersion;
}
@Override
public TokenStream tokenStream(String fieldName, Reader reader) {
if ( luceneVersion.onOrAfter( Version.LUCENE_31 ) ) {
return new PassThroughTokenizer( luceneVersion, reader );
}
else {
return new Pre31PassThroughTokenizer( luceneVersion, reader );
}
}
/**
* To be used when Lucene's Version >= 3.1
* @since 4.2
*/
private static class PassThroughTokenizer extends CharTokenizer {
public PassThroughTokenizer(Version luceneVersion, Reader input) {
super( luceneVersion, input );
}
protected boolean isTokenChar(int c) {
return true;
}
}
/**
* To be used when Lucene's Version < 3.1
* @since 4.2
*/
private static class Pre31PassThroughTokenizer extends CharTokenizer {
public Pre31PassThroughTokenizer(Version luceneVersion, Reader input) {
super( luceneVersion, input );
}
//@Override not really: will be removed in Lucene 4.0
protected boolean isTokenChar(char c) {
return true;
}
}
}