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.nativequery.expr.cmp.operand;
22:
23: import com.db4o.nativequery.expr.cmp.*;
24:
25: public class ArithmeticExpression implements ComparisonOperand {
26: private ArithmeticOperator _op;
27: private ComparisonOperand _left;
28: private ComparisonOperand _right;
29:
30: public ArithmeticExpression(ComparisonOperand left,
31: ComparisonOperand right, ArithmeticOperator op) {
32: this ._op = op;
33: this ._left = left;
34: this ._right = right;
35: }
36:
37: public ComparisonOperand left() {
38: return _left;
39: }
40:
41: public ComparisonOperand right() {
42: return _right;
43: }
44:
45: public ArithmeticOperator op() {
46: return _op;
47: }
48:
49: public String toString() {
50: return "(" + _left + _op + _right + ")";
51: }
52:
53: public boolean equals(Object obj) {
54: if (this == obj) {
55: return true;
56: }
57: if (obj == null || obj.getClass() != getClass()) {
58: return false;
59: }
60: ArithmeticExpression casted = (ArithmeticExpression) obj;
61: return _left.equals(casted._left)
62: && _right.equals(casted._right)
63: && _op.equals(casted._op);
64: }
65:
66: public int hashCode() {
67: int hc = _left.hashCode();
68: hc *= 29 + _right.hashCode();
69: hc *= 29 + _op.hashCode();
70: return hc;
71: }
72:
73: public void accept(ComparisonOperandVisitor visitor) {
74: visitor.visit(this);
75: }
76: }
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