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16 package org.apache.commons.jexl.parser;
17
18 import org.apache.commons.jexl.util.Coercion;
19 import org.apache.commons.jexl.JexlContext;
20
21 /***
22 * a / b, mathematical divide.
23 *
24 * @author <a href="mailto:geirm@apache.org">Geir Magnusson Jr.</a>
25 * @version $Id: ASTDivNode.java 398187 2006-04-29 15:58:45Z dion $
26 */
27 public class ASTDivNode extends SimpleNode {
28 /***
29 * Create the node given an id.
30 *
31 * @param id node id.
32 */
33 public ASTDivNode(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 ASTDivNode(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 jc) throws Exception {
54 Object left = ((SimpleNode) jjtGetChild(0)).value(jc);
55 Object right = ((SimpleNode) jjtGetChild(1)).value(jc);
56
57
58
59
60 if (left == null && right == null) {
61 return new Byte((byte) 0);
62 }
63
64 Double l = Coercion.coerceDouble(left);
65 Double r = Coercion.coerceDouble(right);
66
67
68
69
70 if (r.doubleValue() == 0.0) {
71 return new Double(0.0);
72 }
73
74 return new Double(l.doubleValue() / r.doubleValue());
75
76 }
77 }