ItemIdHitExtractor


1   /*
2    * Copyright 2002-2005 the original author or authors.
3    * 
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    * 
8    *      http://www.apache.org/licenses/LICENSE-2.0
9    * 
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  
17  package info.jtrac.lucene;
18  
19  import org.apache.lucene.document.Document;
20  import org.springmodules.lucene.search.core.HitExtractor;
21  
22  /**
23   * Uses Spring Modules Lucene support
24   * converts a search "hit" into an Item id, which we
25   * can later use to load the actual object
26   */
27  public class ItemIdHitExtractor implements HitExtractor {
28      
29      public Long   mapHit(int i, Document document, float f) {              
30          String   type = document.get("type");
31          if (type == null) {
32              return null;
33          }
34          if (type.equals("item")) {
35              String   id = document.get("id");
36              return new Long  (id);
37          } else if (type.equals("history")) {
38              String   itemId = document.get("itemId");
39              return new Long  (itemId);
40          } else {
41              throw new RuntimeException  ("Unexpected lucene search result: " + document);
42          }
43      }
44   
45  }
46
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