content: /**
   * 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.solr.analysis;
  
  import java.util.Map;
  
  import org.apache.lucene.analysis.TokenStream;
  import org.apache.solr.common.SolrException;
  
  /**
   * Factory for {@link TrimFilter}.
   * <pre class="prettyprint" >
   * &lt;fieldType name="text_trm" class="solr.TextField" positionIncrementGap="100"&gt;
   *   &lt;analyzer&gt;
   *     &lt;tokenizer class="solr.NGramTokenizerFactory"/&gt;
   *     &lt;filter class="solr.TrimFilterFactory" updateOffsets="false"/&gt;
   *   &lt;/analyzer&gt;
   * &lt;/fieldType&gt;</pre>
   * @version $Id$
   * @see TrimFilter
   */
  public class TrimFilterFactory extends BaseTokenFilterFactory {
    
    protected boolean updateOffsets = false;
    
    @Override
    public void init(Map<String,String> args) {
      super.init( args );
      
      String v = args.get( "updateOffsets" );
      if( v != null ) {
        try {
          updateOffsets = Boolean.valueOf( v );
        }
        catch( Exception ex ) {
          throw new SolrException( SolrException.ErrorCode.BAD_REQUEST, "Error reading updateOffsets value.  Must be true or false.", ex );
        }
      }
    }
    
    public TrimFilter create(TokenStream input) {
      return new TrimFilter(input, updateOffsets);
    }
  }
  