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:
17: package org.apache.commons.jexl.parser;
18:
19: import org.apache.commons.jexl.JexlContext;
20: import org.apache.commons.jexl.util.Coercion;
21:
22: /**
23: * Multiplication.
24: *
25: * @author <a href="mailto:geirm@apache.org">Geir Magnusson Jr.</a>
26: * @version $Id: ASTMulNode.java 398206 2006-04-29 16:51:38Z dion $
27: */
28: public class ASTMulNode extends SimpleNode {
29: /**
30: * Create the node given an id.
31: *
32: * @param id node id.
33: */
34: public ASTMulNode(int id) {
35: super (id);
36: }
37:
38: /**
39: * Create a node with the given parser and id.
40: *
41: * @param p a parser.
42: * @param id node id.
43: */
44: public ASTMulNode(Parser p, int id) {
45: super (p, id);
46: }
47:
48: /** {@inheritDoc} */
49: public Object jjtAccept(ParserVisitor visitor, Object data) {
50: return visitor.visit(this , data);
51: }
52:
53: /** {@inheritDoc} */
54: public Object value(JexlContext context) throws Exception {
55: Object left = ((SimpleNode) jjtGetChild(0)).value(context);
56: Object right = ((SimpleNode) jjtGetChild(1)).value(context);
57:
58: /*
59: * the spec says 'and', I think 'or'
60: */
61: if (left == null && right == null) {
62: return new Byte((byte) 0);
63: }
64:
65: /*
66: * if anything is float, double or string with ( "." | "E" | "e") coerce
67: * all to doubles and do it
68: */
69: if (left instanceof Float
70: || left instanceof Double
71: || right instanceof Float
72: || right instanceof Double
73: || (left instanceof String && (((String) left)
74: .indexOf(".") != -1
75: || ((String) left).indexOf("e") != -1 || ((String) left)
76: .indexOf("E") != -1))
77: || (right instanceof String && (((String) right)
78: .indexOf(".") != -1
79: || ((String) right).indexOf("e") != -1 || ((String) right)
80: .indexOf("E") != -1))) {
81: Double l = Coercion.coerceDouble(left);
82: Double r = Coercion.coerceDouble(right);
83:
84: return new Double(l.doubleValue() * r.doubleValue());
85: }
86:
87: /*
88: * otherwise to longs with thee!
89: */
90:
91: Long l = Coercion.coerceLong(left);
92: Long r = Coercion.coerceLong(right);
93:
94: return new Long(l.longValue() * r.longValue());
95: }
96:
97: }
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