package org.apache.lucene.analysis;
/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/
import java.io.IOException;
import java.io.Reader;
/**
* "Tokenizes" the entire stream as a single token. This is useful
* for data like zip codes, ids, and some product names.
*/
public class KeywordAnalyzer extends Analyzer {
public KeywordAnalyzer() {
setOverridesTokenStreamMethod(KeywordAnalyzer.class);
}
@Override
public TokenStream tokenStream(String fieldName,
final Reader reader) {
return new KeywordTokenizer(reader);
}
@Override
public TokenStream reusableTokenStream(String fieldName,
final Reader reader) throws IOException {
if (overridesTokenStreamMethod) {
// LUCENE-1678: force fallback to tokenStream() if we
// have been subclassed and that subclass overrides
// tokenStream but not reusableTokenStream
return tokenStream(fieldName, reader);
}
Tokenizer tokenizer = (Tokenizer) getPreviousTokenStream();
if (tokenizer == null) {
tokenizer = new KeywordTokenizer(reader);
setPreviousTokenStream(tokenizer);
} else
tokenizer.reset(reader);
return tokenizer;
}
}