KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > org > apache > lucene > demo > SearchFiles


1 package org.apache.lucene.demo;
2
3 /**
4  * Copyright 2004 The Apache Software Foundation
5  *
6  * Licensed under the Apache License, Version 2.0 (the "License");
7  * you may not use this file except in compliance with the License.
8  * You may obtain a copy of the License at
9  *
10  * http://www.apache.org/licenses/LICENSE-2.0
11  *
12  * Unless required by applicable law or agreed to in writing, software
13  * distributed under the License is distributed on an "AS IS" BASIS,
14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15  * See the License for the specific language governing permissions and
16  * limitations under the License.
17  */
18
19 import java.io.IOException JavaDoc;
20 import java.io.BufferedReader JavaDoc;
21 import java.io.InputStreamReader JavaDoc;
22
23 import org.apache.lucene.analysis.Analyzer;
24 import org.apache.lucene.analysis.standard.StandardAnalyzer;
25 import org.apache.lucene.document.Document;
26 import org.apache.lucene.search.Searcher;
27 import org.apache.lucene.search.IndexSearcher;
28 import org.apache.lucene.search.Query;
29 import org.apache.lucene.search.Hits;
30 import org.apache.lucene.queryParser.QueryParser;
31
32 class SearchFiles {
33   public static void main(String JavaDoc[] args) {
34     try {
35       Searcher searcher = new IndexSearcher("index");
36       Analyzer analyzer = new StandardAnalyzer();
37
38       BufferedReader JavaDoc in = new BufferedReader JavaDoc(new InputStreamReader JavaDoc(System.in));
39       while (true) {
40     System.out.print("Query: ");
41     String JavaDoc line = in.readLine();
42
43     if (line.length() == -1)
44       break;
45
46     Query query = QueryParser.parse(line, "contents", analyzer);
47     System.out.println("Searching for: " + query.toString("contents"));
48
49     Hits hits = searcher.search(query);
50     System.out.println(hits.length() + " total matching documents");
51
52     final int HITS_PER_PAGE = 10;
53     for (int start = 0; start < hits.length(); start += HITS_PER_PAGE) {
54       int end = Math.min(hits.length(), start + HITS_PER_PAGE);
55       for (int i = start; i < end; i++) {
56         Document doc = hits.doc(i);
57         String JavaDoc path = doc.get("path");
58         if (path != null) {
59               System.out.println(i + ". " + path);
60         } else {
61               String JavaDoc url = doc.get("url");
62           if (url != null) {
63         System.out.println(i + ". " + url);
64         System.out.println(" - " + doc.get("title"));
65           } else {
66         System.out.println(i + ". " + "No path nor URL for this document");
67           }
68         }
69       }
70
71       if (hits.length() > end) {
72         System.out.print("more (y/n) ? ");
73         line = in.readLine();
74         if (line.length() == 0 || line.charAt(0) == 'n')
75           break;
76       }
77     }
78       }
79       searcher.close();
80
81     } catch (Exception JavaDoc e) {
82       System.out.println(" caught a " + e.getClass() +
83              "\n with message: " + e.getMessage());
84     }
85   }
86 }
87
Popular Tags