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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 * GE : a >= b
23 *
24 * Follows A.3.6.1 of the JSTL 1.0 specification
25 *
26 * @author <a href="mailto:geirm@apache.org">Geir Magnusson Jr.</a>
27 * @author <a href="mailto:proyal@apache.org">Peter Royal</a>
28 * @version $Id: ASTGENode.java,v 1.4 2004/02/28 13:45:20 yoavs Exp $
29 */
30 public class ASTGENode extends SimpleNode
31 {
32 public ASTGENode(int id)
33 {
34 super(id);
35 }
36
37 public ASTGENode(Parser p, int id)
38 {
39 super(p, id);
40 }
41
42
43 /*** Accept the visitor. **/
44 public Object jjtAccept(ParserVisitor visitor, Object data)
45 {
46 return visitor.visit(this, data);
47 }
48
49 public Object value(JexlContext jc)
50 throws Exception
51 {
52
53
54
55
56 Object left = ( (SimpleNode) jjtGetChild(0)).value(jc);
57 Object right = ( (SimpleNode) jjtGetChild(1)).value(jc);
58
59 if( left == right )
60 {
61 return Boolean.TRUE;
62 }
63 else if ( ( left == null ) || ( right == null ) )
64 {
65 return Boolean.FALSE;
66 }
67 else if( Coercion.isFloatingPoint( left ) || Coercion.isFloatingPoint( right ) )
68 {
69 double leftDouble = Coercion.coerceDouble( left ).doubleValue();
70 double rightDouble = Coercion.coerceDouble( right ).doubleValue();
71
72 return leftDouble >= rightDouble
73 ? Boolean.TRUE
74 : Boolean.FALSE;
75 }
76 else if( Coercion.isNumberable( left ) || Coercion.isNumberable( right ) )
77 {
78 long leftLong = Coercion.coerceLong( left ).longValue();
79 long rightLong = Coercion.coerceLong( right ).longValue();
80
81 return leftLong >= rightLong
82 ? Boolean.TRUE
83 : Boolean.FALSE;
84 }
85 else if( left instanceof String || right instanceof String )
86 {
87 String leftString = left.toString();
88 String rightString = right.toString();
89
90 return leftString.compareTo( rightString ) >= 0
91 ? Boolean.TRUE
92 : Boolean.FALSE;
93 }
94 else if( left instanceof Comparable )
95 {
96 return ( (Comparable)left ).compareTo( right ) >= 0
97 ? Boolean.TRUE
98 : Boolean.FALSE;
99 }
100 else if( right instanceof Comparable )
101 {
102 return ( (Comparable)right ).compareTo( left ) <= 0
103 ? Boolean.TRUE
104 : Boolean.FALSE;
105 }
106
107 throw new Exception("Invalid comparison : GE ");
108 }
109
110 }