01: /*
02: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
03: *
04: * // Copyright (c) 1998, 2007, Oracle. All rights reserved.
05: *
06: *
07: * The contents of this file are subject to the terms of either the GNU
08: * General Public License Version 2 only ("GPL") or the Common Development
09: * and Distribution License("CDDL") (collectively, the "License"). You
10: * may not use this file except in compliance with the License. You can obtain
11: * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
12: * or glassfish/bootstrap/legal/LICENSE.txt. See the License for the specific
13: * language governing permissions and limitations under the License.
14: *
15: * When distributing the software, include this License Header Notice in each
16: * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
17: * Sun designates this particular file as subject to the "Classpath" exception
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19: * accompanied this code. If applicable, add the following below the License
20: * Header, with the fields enclosed by brackets [] replaced by your own
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29: * Version 2] license." If you don't indicate a single choice of license, a
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32: * its licensees as provided above. However, if you add GPL Version 2 code
33: * and therefore, elected the GPL Version 2 license, then the option applies
34: * only if the new code is made subject to such option by the copyright
35: * holder.
36: */
37: package oracle.toplink.essentials.internal.parsing;
38:
39: import oracle.toplink.essentials.expressions.*;
40:
41: /**
42: * INTERNAL
43: * <p><b>Purpose</b>: Represent an ABS in EJBQL
44: * <p><b>Responsibilities</b>:<ul>
45: * <li> Generate the correct expression for an ABS in EJBQL
46: * </ul>
47: * @author Jon Driscoll and Joel Lucuik
48: * @since TopLink 4.0
49: */
50: public class AbsNode extends ArithmeticFunctionNode {
51: public AbsNode() {
52: super ();
53: }
54:
55: /**
56: * INTERNAL
57: * Validate node and calculate its type.
58: */
59: public void validate(ParseTreeContext context) {
60: if (left != null) {
61: left.validate(context);
62: setType(left.getType());
63: }
64: }
65:
66: /**
67: * INTERNAL
68: */
69: public void validateParameter(ParseTreeContext context,
70: Object contextType) {
71: // delegate to the argument node
72: left.validateParameter(context, contextType);
73: }
74:
75: /**
76: * INTERNAL
77: * Generate the TopLink expression for this node
78: */
79: public Expression generateExpression(GenerationContext context) {
80: Expression whereClause = getLeft().generateExpression(context);
81: whereClause = ExpressionMath.abs(whereClause);
82: return whereClause;
83: }
84:
85: }
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