lucene-java-3.4.0/lucene/contrib/xml-query-parser/src/java/org/apache/lucene/xmlparser/builders/DuplicateFilterBuilder.java

   1 /*
   2  * Created on 25-Jan-2006
   3  */
   4 package org.apache.lucene.xmlparser.builders;
   5
   6 import org.apache.lucene.search.DuplicateFilter;
   7 import org.apache.lucene.search.Filter;
   8 import org.apache.lucene.xmlparser.DOMUtils;
   9 import org.apache.lucene.xmlparser.FilterBuilder;
  10 import org.apache.lucene.xmlparser.ParserException;
  11 import org.w3c.dom.Element;
  12
  13 /**
  14  * Licensed to the Apache Software Foundation (ASF) under one or more
  15  * contributor license agreements.  See the NOTICE file distributed with
  16  * this work for additional information regarding copyright ownership.
  17  * The ASF licenses this file to You under the Apache License, Version 2.0
  18  * (the "License"); you may not use this file except in compliance with
  19  * the License.  You may obtain a copy of the License at
  20  *
  21  *     http://www.apache.org/licenses/LICENSE-2.0
  22  *
  23  * Unless required by applicable law or agreed to in writing, software
  24  * distributed under the License is distributed on an "AS IS" BASIS,
  25  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  26  * See the License for the specific language governing permissions and
  27  * limitations under the License.
  28  */
  29
  30 /**
  31  *
  32  */
  33 public class DuplicateFilterBuilder implements FilterBuilder {
  34
  35
  36         public Filter getFilter(Element e) throws ParserException {
  37         String fieldName=DOMUtils.getAttributeWithInheritanceOrFail(e,"fieldName");
  38                 DuplicateFilter df=new DuplicateFilter(fieldName);
  39                 String keepMode=DOMUtils.getAttribute(e,"keepMode","first");
  40                 if(keepMode.equalsIgnoreCase("first"))
  41                 {
  42                         df.setKeepMode(DuplicateFilter.KM_USE_FIRST_OCCURRENCE);
  43                 }
  44                 else
  45                         if(keepMode.equalsIgnoreCase("last"))
  46                         {
  47                                 df.setKeepMode(DuplicateFilter.KM_USE_LAST_OCCURRENCE);
  48                         }
  49                         else
  50                         {
  51                                 throw new ParserException("Illegal keepMode attribute in DuplicateFilter:"+keepMode);
  52                         }
  53                 String processingMode=DOMUtils.getAttribute(e,"processingMode","full");
  54                 if(processingMode.equalsIgnoreCase("full"))
  55                 {
  56                         df.setProcessingMode(DuplicateFilter.PM_FULL_VALIDATION);
  57                 }
  58                 else
  59                         if(processingMode.equalsIgnoreCase("fast"))
  60                         {
  61                                 df.setProcessingMode(DuplicateFilter.PM_FAST_INVALIDATION);
  62                         }
  63                         else
  64                         {
  65                                 throw new ParserException("Illegal processingMode attribute in DuplicateFilter:"+processingMode);
  66                         }
  67
  68                 return df;
  69         }
  70
  71 }