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1
5 package org.exoplatform.services.indexing;
6
7 import org.apache.lucene.document.Document;
8 import org.apache.lucene.document.Field;
9 import org.apache.lucene.index.Term;
10 import org.apache.lucene.search.IndexSearcher;
11 import org.apache.lucene.search.TermQuery;
12 import org.picocontainer.Startable;
13
18 abstract public class BaseIndexerPlugin implements IndexerPlugin, Startable {
19 final static public String  [] MANDATORY_FIELDS =
20 {IndexingService.IDENTIFIER_FIELD, IndexingService.MODULE_FIELD,
21 IndexingService.TITLE_FIELD, IndexingService.DOCUMENT_FIELD};
22
23 private String [] indexField_ ;
24 private Searcher searcher_ ;
25 protected IndexingService iservice_ ;
26
27 public BaseIndexerPlugin(IndexingService iservice) {
28 iservice.addIndexerPlugin(this) ;
29 iservice_ = iservice ;
30 }
31
32
33 abstract public String getPluginIdentifier() ;
34
35 final public String [] getMandatoryIndexFields() { return MANDATORY_FIELDS ; }
36 public String [] getCustomizedIndexFields() { return indexField_ ; }
37
38 synchronized public Searcher getSearcher() throws Exception {
39 if(searcher_ == null) {
40 IndexSearcher isearcher = new IndexSearcher(iservice_.getIndexDatabaseLocation()) ;
41 searcher_ = new Searcher(isearcher, iservice_.getAnalyzer());
42 searcher_.setQueryModules(new TermQuery(new Term(IndexingService.MODULE_FIELD, getPluginIdentifier()))) ;
43 }
44 return searcher_ ;
45 }
46
47 synchronized public void resetSearcher() {
48 searcher_ = null ;
49 }
50
51 protected Document createBaseDocument(String identifier, String author,
52 String title, String description,
53 String textToIndex, String viewRole) {
54 Document doc = new Document();
55 if(description == null) {
56 if(textToIndex.length() < 50 ) description = textToIndex ;
57 else description = textToIndex.substring(0, 50) ;
58 }
59 if(viewRole == null) viewRole = "owner" ;
60 doc.add(Field.Keyword(IndexingService.IDENTIFIER_FIELD, identifier)) ;
61 doc.add(Field.Keyword(IndexingService.MODULE_FIELD, getPluginIdentifier())) ;
62 doc.add(Field.Keyword(IndexingService.AUTHOR_FIELD, author)) ;
63 doc.add(Field.Text(IndexingService.TITLE_FIELD, title)) ;
64 doc.add(Field.Text(IndexingService.DESCRIPTION_FIELD, description)) ;
65 doc.add(Field.UnStored(IndexingService.DOCUMENT_FIELD, textToIndex)) ;
66 doc.add(Field.UnStored(IndexingService.DOCUMENT_ACCESS_ROLE, viewRole)) ;
67 return doc ;
68 }
69
70 public void removeIndex() throws Exception {
71 Term term = new Term(IndexingService.MODULE_FIELD, getPluginIdentifier()) ;
72 iservice_.queueDeleteDocuments(term) ;
73 }
74
75 public void reindex() throws Exception {
76 removeIndex() ;
77 }
78
79 protected String getContentDescription(String text, int size) {
80 char[] chars = text.toCharArray() ;
81 StringBuffer b = new StringBuffer () ;
82 int counter = 0 ;
83 for(int i = 0 ; i < chars.length && counter < size; i++ ) {
84 if(chars[i] == '<') {
85 while(chars[i] != '>' && i < chars.length) {
86 i++ ;
87 }
88 b.append(" - ") ;
89 } else {
90 b.append(chars[i]) ;
91 counter++ ;
92 }
93 }
94 return b.toString() ;
95 }
96
97 public void start() {}
98
99 public void stop() {}
100 } |
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