LuceneIndexerInterceptor


1   /*
2    * Copyright 2004 JavaFree.org
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  package org.javabb.interceptor;
17  
18  import org.aopalliance.intercept.MethodInterceptor;
19  import org.aopalliance.intercept.MethodInvocation;
20  
21  import org.apache.commons.logging.Log;
22  import org.apache.commons.logging.LogFactory;
23  
24  import org.javabb.lucene.index.Indexer;
25  
26  import org.javabb.vo.Post;
27  
28  /**
29   * @author <a HREF="mailto:jackganzha@dev.java.net">Marcos Silva Pereira</a>
30   * 
31   * $Id: LuceneIndexerInterceptor.java,v 1.3 2005/04/08 20:19:42 daltoncamargo
32   * Exp $
33   */
34  public class LuceneIndexerInterceptor implements MethodInterceptor {
35  
36      protected static final Log logger = LogFactory
37              .getLog(LuceneIndexerInterceptor.class);
38  
39      private Indexer indexer;
40  
41      /**
42       *  
43       */
44      public LuceneIndexerInterceptor() {
45  
46          // TODO Auto-generated constructor stub
47      }
48  
49      /**
50       * @param index
51       */
52      public LuceneIndexerInterceptor(Indexer index) {
53  
54          this.indexer = index;
55  
56      }
57  
58      /**
59       * @return Returns the indexer.
60       */
61      public Indexer getIndexer() {
62  
63          return indexer;
64  
65      }
66  
67      /**
68       * @param indexer
69       *            The indexer to set.
70       */
71      public void setIndexer(Indexer indexer) {
72  
73          this.indexer = indexer;
74  
75      }
76  
77      /**
78       * Works only for Post objects.
79       * 
80       * @see org.aopalliance.intercept.MethodInterceptor#invoke(org.aopalliance.intercept.MethodInvocation)
81       */
82      public Object   invoke(MethodInvocation invocation) throws Throwable   {
83  
84          Object  [] params = invocation.getArguments();
85          Object   post = params[0];
86  
87          Object   result = post;
88  
89          if (post instanceof Post) {
90  
91              Post postObj = (Post) post;
92              indexer.index(postObj);
93  
94              result = invocation.proceed();
95  
96          } else {
97  
98              // TODO logger...
99          }
100 
101         return result;
102 
103     }
104 
105 }
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