SimpleKeywordAnalyzer.java

package lia.analysis.keyword;

/**
 * Copyright Manning Publications Co.
 *
 * 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 lan      
*/

import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.CharTokenizer;

import java.io.Reader;

// From chapter 4

/**
 * CharTokenizer limits token width to 255 characters, though.
 * This implementation assumes keywords are 255 in length or less.
 */

public class SimpleKeywordAnalyzer extends Analyzer {

    public TokenStream tokenStream(String fieldName,
                                   Reader reader) {
        return new CharTokenizer(reader) {
            protected boolean isTokenChar(char c) {
                return true;
            }
        };
    }

}