content: package org.apache.lucene.analysis.sinks;
  
  /**
   * 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 org.apache.lucene.analysis.TeeSinkTokenFilter.SinkFilter;
  import org.apache.lucene.analysis.tokenattributes.TypeAttribute;
  import org.apache.lucene.util.AttributeSource;
  
  public class TokenTypeSinkFilter extends SinkFilter {
    private String typeToMatch;
    private TypeAttribute typeAtt;
  
    public TokenTypeSinkFilter(String typeToMatch) {
      this.typeToMatch = typeToMatch;
    }
  
    @Override
    public boolean accept(AttributeSource source) {
      if (typeAtt == null) {
        typeAtt = source.addAttribute(TypeAttribute.class);
      }
      
      //check to see if this is a Category
      return (typeToMatch.equals(typeAtt.type()));
    }
  
  }
  