01: /* Copyright (C) 2004 - 2007 db4objects Inc. http://www.db4o.com
02:
03: This file is part of the db4o open source object database.
04:
05: db4o is free software; you can redistribute it and/or modify it under
06: the terms of version 2 of the GNU General Public License as published
07: by the Free Software Foundation and as clarified by db4objects' GPL
08: interpretation policy, available at
09: 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.internal.query.processor;
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,
55: Object a_value) {
56: Iterator4 i = i_evaluators.iterator();
57: while (i.moveNext()) {
58: if (((QE) i.current()).evaluate(a_constraint, a_candidate,
59: a_value)) {
60: return true;
61: }
62: }
63: return false;
64: }
65:
66: public void indexBitMap(boolean[] bits) {
67: Iterator4 i = i_evaluators.iterator();
68: while (i.moveNext()) {
69: ((QE) i.current()).indexBitMap(bits);
70: }
71: }
72:
73: public boolean supportsIndex() {
74: Iterator4 i = i_evaluators.iterator();
75: while (i.moveNext()) {
76: if (!((QE) i.current()).supportsIndex()) {
77: return false;
78: }
79: }
80: return true;
81: }
82:
83: }
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