content: 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 org.apache.lucene.analysis.tokenattributes.CharTermAttribute;
  
  /**
   * Removes words that are too long or too short from the stream.
   * <p>
   * Note: Length is calculated as the number of UTF-16 code units.
   * </p>
   */
  public final class LengthFilter extends FilteringTokenFilter {
  
    private final int min;
    private final int max;
    
    private final CharTermAttribute termAtt = addAttribute(CharTermAttribute.class);
  
    /**
     * Build a filter that removes words that are too long or too
     * short from the text.
     */
    public LengthFilter(boolean enablePositionIncrements, TokenStream in, int min, int max) {
      super(enablePositionIncrements, in);
      this.min = min;
      this.max = max;
    }
    
    /**
     * Build a filter that removes words that are too long or too
     * short from the text.
     * @deprecated Use {@link #LengthFilter(boolean, TokenStream, int, int)} instead.
     */
    @Deprecated
    public LengthFilter(TokenStream in, int min, int max) {
      this(false, in, min, max);
    }
    
    @Override
    public boolean accept() throws IOException {
      final int len = termAtt.length();
      return (len >= min && len <= max);
    }
  }
  