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Java > Open Source Codes > com > db4o > QEMulti


1 /* Copyright (C) 2004 - 2006 db4objects Inc. http://www.db4o.com
2
3 This file is part of the db4o open source object database.
4
5 db4o is free software; you can redistribute it and/or modify it under
6 the terms of version 2 of the GNU General Public License as published
7 by the Free Software Foundation and as clarified by db4objects' GPL
8 interpretation policy, available at
9 http://www.db4o.com/about/company/legalpolicies/gplinterpretation/
10 Alternatively you can write to db4objects, Inc., 1900 S Norfolk Street,
11 Suite 350, San Mateo, CA 94403, USA.
12
13 db4o is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 for more details.
17
18 You should have received a copy of the GNU General Public License along
19 with this program; if not, write to the Free Software Foundation, Inc.,
20 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */

21 package com.db4o;
22
23 import com.db4o.foundation.*;
24
25 /**
26  * @exclude
27  */

28 public class QEMulti extends QE{
29     
30     public Collection4 i_evaluators = new Collection4();
31     
32     QE add(QE evaluator){
33         i_evaluators.ensure(evaluator);
34         return this;
35     }
36     
37     public boolean identity(){
38         boolean ret = false;
39         Iterator4 i = i_evaluators.iterator();
40         while(i.moveNext()){
41             if(((QE)i.current()).identity()){
42                 ret = true;
43             }else{
44                 return false;
45             }
46         }
47         return ret;
48     }
49     
50     boolean isDefault(){
51         return false;
52     }
53     
54     boolean evaluate(QConObject a_constraint, QCandidate a_candidate, Object JavaDoc a_value){
55         Iterator4 i = i_evaluators.iterator();
56         while(i.moveNext()){
57             if(((QE)i.current()).evaluate(a_constraint, a_candidate, a_value)){
58                 return true;
59             }
60         }
61         return false;
62     }
63     
64     public void indexBitMap(boolean[] bits){
65         Iterator4 i = i_evaluators.iterator();
66         while(i.moveNext()){
67             ((QE)i.current()).indexBitMap(bits);
68         }
69     }
70     
71     public boolean supportsIndex(){
72         Iterator4 i = i_evaluators.iterator();
73         while(i.moveNext()){
74             if(! ((QE)i.current()).supportsIndex()){
75                 return false;
76             }
77         }
78         return true;
79     }
80     
81     
82     
83 }
84
85
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