content: /**
   * Copyright 2009 Alexander Kuznetsov
   *
   * 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.apache.lucene.morphology.english.stemmer;
  
  
  import org.apache.lucene.analysis.TokenFilter;
  import org.apache.lucene.analysis.TokenStream;
  import org.apache.lucene.analysis.tokenattributes.CharTermAttribute;
  
  import java.io.IOException;
  
  public class EnglishStemmerFilter extends TokenFilter {
      private EnglishStemmer englishStemmer;
      private final CharTermAttribute termAtt = addAttribute(CharTermAttribute.class);
  
      public EnglishStemmerFilter(TokenStream input, EnglishStemmer englishStemmer) {
          super(input);
          this.englishStemmer = englishStemmer;
      }
  
  
      final public boolean incrementToken() throws IOException {
  
          boolean b = input.incrementToken();
          if (!b) {
              return false;
          }
          String s = new String(termAtt.buffer(), 0, termAtt.length());
          s = englishStemmer.getStemmedWord(s);
          termAtt.setEmpty();
          termAtt.append(s);
          return true;
      }
  
  }