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comparison lucene/src/luan/modules/lucene/LuceneSearcher.java @ 230:4438cb2e04d0

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start lucene git-svn-id: https://luan-java.googlecode.com/svn/trunk@231 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Tue, 30 Sep 2014 20:03:56 +0000
parents
children 9ce18106f95a
comparison
equal deleted inserted replaced
229:2a54cb7d1cf4 230:4438cb2e04d0
1 package luan.modules.lucene;
2
3 import java.io.IOException;
4 import java.util.Iterator;
5 import java.util.NoSuchElementException;
6 import org.apache.lucene.index.IndexReader;
7 import org.apache.lucene.document.Document;
8 import org.apache.lucene.search.IndexSearcher;
9 import org.apache.lucene.search.Query;
10 import org.apache.lucene.search.TopDocs;
11 import org.apache.lucene.search.TopFieldDocs;
12 import org.apache.lucene.search.Sort;
13 import org.apache.lucene.search.ScoreDoc;
14 import luan.LuanTable;
15
16
17 public final class LuceneSearcher {
18 private final IndexSearcher searcher;
19
20 LuceneSearcher(IndexReader reader) {
21 this.searcher = new IndexSearcher(reader);
22 }
23
24 // call in finally block
25 public void close() {
26 try {
27 searcher.getIndexReader().decRef();
28 } catch(IOException e) {
29 throw new RuntimeException(e);
30 }
31 }
32
33 private Document rawDoc(int docID) {
34 try {
35 return searcher.doc(docID);
36 } catch(IOException e) {
37 throw new RuntimeException(e);
38 }
39 }
40
41 public LuanTable doc(int docID) {
42 return LuceneDocument.toTable(rawDoc(docID));
43 }
44
45 public TopDocs search(Query query,int n) {
46 try {
47 return searcher.search(query,n);
48 } catch(IOException e) {
49 throw new RuntimeException(e);
50 }
51 }
52
53 public TopFieldDocs search(Query query,int n,Sort sort) {
54 try {
55 return searcher.search(query,n,sort);
56 } catch(IOException e) {
57 throw new RuntimeException(e);
58 }
59 }
60
61 public Iterable<LuanTable> docs(TopDocs td) {
62 final ScoreDoc[] scoreDocs = td.scoreDocs;
63 return new Iterable<LuanTable>() {
64 public Iterator<LuanTable> iterator() {
65 return new Iterator<LuanTable>() {
66 private int i = 0;
67
68 public boolean hasNext() {
69 return i < scoreDocs.length;
70 }
71
72 public LuanTable next() {
73 if( !hasNext() )
74 throw new NoSuchElementException();
75 return doc(scoreDocs[i++].doc);
76 }
77
78 public void remove() {
79 throw new UnsupportedOperationException();
80 }
81 };
82 }
83 };
84 }
85 }