/hudson-core/src/main/java/hudson/search/UnionSearchIndex.java

 1/*
 2 * The MIT License
 3 * 
 4 * Copyright (c) 2004-2009, Sun Microsystems, Inc., Kohsuke Kawaguchi
 5 * 
 6 * Permission is hereby granted, free of charge, to any person obtaining a copy
 7 * of this software and associated documentation files (the "Software"), to deal
 8 * in the Software without restriction, including without limitation the rights
 9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 * 
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 * 
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24package hudson.search;
25
26import java.util.List;
27
28/**
29 * Union of two sets.
30 *
31 * @author Kohsuke Kawaguchi
32 */
33public class UnionSearchIndex implements SearchIndex {
34    public static SearchIndex combine(SearchIndex... sets) {
35        SearchIndex p=EMPTY;
36        for (SearchIndex q : sets) {
37            // allow some of the inputs to be null,
38            // and also recognize EMPTY
39            if (q != null && q != EMPTY) {
40                if (p == EMPTY)
41                    p = q;
42                else
43                    p = new UnionSearchIndex(p,q);
44            }
45        }
46        return p;
47    }
48
49    private final SearchIndex lhs,rhs;
50
51    public UnionSearchIndex(SearchIndex lhs, SearchIndex rhs) {
52        this.lhs = lhs;
53        this.rhs = rhs;
54    }
55
56    public void find(String token, List<SearchItem> result) {
57        lhs.find(token,result);
58        rhs.find(token,result);
59    }
60
61    public void suggest(String token, List<SearchItem> result) {
62        lhs.suggest(token,result);
63        rhs.suggest(token,result);
64    }
65}