RemoveDuplicatesTokenFilterFactory.java

/*
 * 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.
 */
package org.apache.lucene.analysis.miscellaneous;


import java.util.Map;

import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.miscellaneous.RemoveDuplicatesTokenFilter;
import org.apache.lucene.analysis.util.TokenFilterFactory;

/**
 * Factory for {@link RemoveDuplicatesTokenFilter}.
 * <pre class="prettyprint">
 * <fieldType name="text_rmdup" class="solr.TextField" positionIncrementGap="100">
 *   <analyzer>
 *     <tokenizer class="solr.WhitespaceTokenizerFactory"/>
 *     <filter class="solr.RemoveDuplicatesTokenFilterFactory"/>
 *   </analyzer>
 * </fieldType></pre>
 */
public class RemoveDuplicatesTokenFilterFactory extends TokenFilterFactory {
  
  /** Creates a new RemoveDuplicatesTokenFilterFactory */
  public RemoveDuplicatesTokenFilterFactory(Map<String,String> args) {
    super(args);
    if (!args.isEmpty()) {
      throw new IllegalArgumentException("Unknown parameters: " + args);
    }
  }
  
  @Override
  public RemoveDuplicatesTokenFilter create(TokenStream input) {
    return new RemoveDuplicatesTokenFilter(input);
  }
}