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;
22:
23: import com.db4o.nativequery.expr.cmp.operand.*;
24:
25: public class TraversingExpressionVisitor implements ExpressionVisitor,
26: ComparisonOperandVisitor {
27: public void visit(AndExpression expression) {
28: expression.left().accept(this );
29: expression.right().accept(this );
30: }
31:
32: public void visit(BoolConstExpression expression) {
33: }
34:
35: public void visit(OrExpression expression) {
36: expression.left().accept(this );
37: expression.right().accept(this );
38: }
39:
40: public void visit(ComparisonExpression expression) {
41: expression.left().accept(this );
42: expression.right().accept(this );
43: }
44:
45: public void visit(NotExpression expression) {
46: expression.expr().accept(this );
47: }
48:
49: public void visit(ArithmeticExpression operand) {
50: operand.left().accept(this );
51: operand.right().accept(this );
52: }
53:
54: public void visit(ConstValue operand) {
55: }
56:
57: public void visit(FieldValue operand) {
58: operand.parent().accept(this );
59: }
60:
61: public void visit(CandidateFieldRoot root) {
62: }
63:
64: public void visit(PredicateFieldRoot root) {
65: }
66:
67: public void visit(StaticFieldRoot root) {
68: }
69:
70: public void visit(ArrayAccessValue operand) {
71: operand.parent().accept(this );
72: operand.index().accept(this );
73: }
74:
75: public void visit(MethodCallValue value) {
76: value.parent().accept(this );
77: visitArgs(value);
78: }
79:
80: protected void visitArgs(MethodCallValue value) {
81: ComparisonOperand[] args = value.args();
82: for (int i = 0; i < args.length; ++i) {
83: args[i].accept(this);
84: }
85: }
86: }
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