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1
28
29 package com.caucho.jms.selector;
30
31 import com.caucho.util.L10N;
32
33 import javax.jms.JMSException  ;
34 import javax.jms.Message ;
35
36
39 public class NumericBinarySelector extends Selector {
40 static L10N L = new L10N(Selector.class);
41
42 private int _token;
43 private Selector _left;
44 private Selector _right;
45
46 NumericBinarySelector(int token, Selector left, Selector right)
47 {
48 _token = token;
49 _left = left;
50 _right = right;
51 }
52
53
57 Object evaluate(Message message)
58 throws JMSException
59 {
60 Object lobj = _left.evaluate(message);
61 Object robj = _right.evaluate(message);
62
63 if (! (lobj instanceof Number ) || ! (robj instanceof Number ))
64 return NULL;
65
66 if (isInteger(lobj) && isInteger(robj)) {
67 long lvalue = toLong(lobj);
68 long rvalue = toLong(robj);
69
70 switch (_token) {
71 case '+':
72 return new Long (lvalue + rvalue);
73
74 case '-':
75 return new Long (lvalue - rvalue);
76
77 case '*':
78 return new Long (lvalue * rvalue);
79
80 case '/':
81 return new Long (lvalue / rvalue);
82
83 default:
84 throw new RuntimeException ("Unknown expression");
85 }
86 }
87 else {
88 double lvalue = ((Number ) lobj).doubleValue();
89 double rvalue = ((Number ) robj).doubleValue();
90
91 switch (_token) {
92 case '+':
93 return new Double (lvalue + rvalue);
94
95 case '-':
96 return new Double (lvalue - rvalue);
97
98 case '*':
99 return new Double (lvalue * rvalue);
100
101 case '/':
102 return new Double (lvalue / rvalue);
103
104 default:
105 throw new RuntimeException ("Unknown expression");
106 }
107 }
108 }
109 }
110 |
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