01: /*
02: * Copyright 2002-2006 The Apache Software Foundation.
03: *
04: * Licensed under the Apache License, Version 2.0 (the "License");
05: * you may not use this file except in compliance with the License.
06: * You may obtain a copy of the License at
07: *
08: * http://www.apache.org/licenses/LICENSE-2.0
09: *
10: * Unless required by applicable law or agreed to in writing, software
11: * distributed under the License is distributed on an "AS IS" BASIS,
12: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13: * See the License for the specific language governing permissions and
14: * limitations under the License.
15: */
16: package org.apache.commons.jexl.parser;
17:
18: import org.apache.commons.jexl.JexlContext;
19: import org.apache.commons.jexl.util.Coercion;
20:
21: /**
22: * Not equal to. Use '!=' or 'ne', do not use <>.
23: *
24: * @author <a href="mailto:geirm@apache.org">Geir Magnusson Jr.</a>
25: * @version $Id: ASTNENode.java 398270 2006-04-30 03:02:58Z dion $
26: */
27: public class ASTNENode extends SimpleNode {
28: /**
29: * Create the node given an id.
30: *
31: * @param id node id.
32: */
33: public ASTNENode(int id) {
34: super (id);
35: }
36:
37: /**
38: * Create a node with the given parser and id.
39: *
40: * @param p a parser.
41: * @param id node id.
42: */
43: public ASTNENode(Parser p, int id) {
44: super (p, id);
45: }
46:
47: /** {@inheritDoc} */
48: public Object jjtAccept(ParserVisitor visitor, Object data) {
49: return visitor.visit(this , data);
50: }
51:
52: /** {@inheritDoc} */
53: public Object value(JexlContext pc) throws Exception {
54: Object left = ((SimpleNode) jjtGetChild(0)).value(pc);
55: Object right = ((SimpleNode) jjtGetChild(1)).value(pc);
56:
57: if (left == null && right == null) {
58: /*
59: * first, the possibility that both *are* null
60: */
61:
62: return Boolean.FALSE;
63: } else if (left == null || right == null) {
64: /*
65: * otherwise, both aren't, so it's clear L != R
66: */
67: return Boolean.TRUE;
68: } else if (left.getClass().equals(right.getClass())) {
69: return (left.equals(right)) ? Boolean.FALSE : Boolean.TRUE;
70: } else if (left instanceof Float || left instanceof Double
71: || right instanceof Float || right instanceof Double) {
72: return (Coercion.coerceDouble(left).equals(Coercion
73: .coerceDouble(right))) ? Boolean.FALSE
74: : Boolean.TRUE;
75: } else if (left instanceof Number || right instanceof Number
76: || left instanceof Character
77: || right instanceof Character) {
78: return (Coercion.coerceLong(left).equals(Coercion
79: .coerceLong(right))) ? Boolean.FALSE : Boolean.TRUE;
80: } else if (left instanceof Boolean || right instanceof Boolean) {
81: return (Coercion.coerceBoolean(left).equals(Coercion
82: .coerceBoolean(right))) ? Boolean.FALSE
83: : Boolean.TRUE;
84: } else if (left instanceof java.lang.String
85: || right instanceof String) {
86: return (left.toString().equals(right.toString())) ? Boolean.FALSE
87: : Boolean.TRUE;
88: }
89:
90: return (left.equals(right)) ? Boolean.FALSE : Boolean.TRUE;
91: }
92: }
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