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;/** * Removes words that are too long and too short from the stream. * * * @version $Id: LengthFilter.java 687357 2008-08-20 14:38:07Z mikemccand $ */public final class LengthFilter extends TokenFilter {  final int min;  final int max;  /**   * Build a filter that removes words that are too long or too   * short from the text.   */  public LengthFilter(TokenStream in, int min, int max)  {    super(in);    this.min = min;    this.max = max;  }  /**   * Returns the next input Token whose term() is the right len   */  public final Token next(final Token reusableToken) throws IOException  {    assert reusableToken != null;    // return the first non-stop word found    for (Token nextToken = input.next(reusableToken); nextToken != null; nextToken = input.next(reusableToken))    {      int len = nextToken.termLength();      if (len >= min && len <= max) {          return nextToken;      }      // note: else we ignore it but should we index each part of it?    }    // reached EOS -- return null    return null;  }}