Package org.apache.lucene.analysis.miscellaneous

Source Code of org.apache.lucene.analysis.miscellaneous.LimitTokenCountFilterFactory

package org.apache.lucene.analysis.miscellaneous;

/*
* 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.util.Map;

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

/**
* Factory for {@link LimitTokenCountFilter}.
* <pre class="prettyprint" >
* &lt;fieldType name="text_lngthcnt" class="solr.TextField" positionIncrementGap="100"&gt;
*   &lt;analyzer&gt;
*     &lt;tokenizer class="solr.WhitespaceTokenizerFactory"/&gt;
*     &lt;filter class="solr.LimitTokenCountFilterFactory" maxTokenCount="10" consumeAllTokens="false" /&gt;
*   &lt;/analyzer&gt;
* &lt;/fieldType&gt;</pre>
* <p>
* The {@code consumeAllTokens} property is optional and defaults to {@code false}.  See {@link LimitTokenCountFilter} for an explanation of it's use.
*/
public class LimitTokenCountFilterFactory extends TokenFilterFactory {

  public static final String MAX_TOKEN_COUNT_KEY = "maxTokenCount";
  public static final String CONSUME_ALL_TOKENS_KEY = "consumeAllTokens";
  int maxTokenCount;
  boolean consumeAllTokens;

  @Override
  public void init(Map<String, String> args) {
    super.init( args );
    maxTokenCount = getInt(MAX_TOKEN_COUNT_KEY);
    consumeAllTokens = getBoolean(CONSUME_ALL_TOKENS_KEY, false);
  }

  @Override
  public TokenStream create(TokenStream input) {
    return new LimitTokenCountFilter(input, maxTokenCount, consumeAllTokens);
  }

}
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