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1
28
29 package com.caucho.jms.selector;
30
31 import com.caucho.jms.message.ObjectConverter;
32 import com.caucho.log.Log;
33 import com.caucho.util.L10N;
34
35 import javax.jms.JMSException  ;
36 import javax.jms.Message ;
37 import java.util.logging.Logger ;
38
39
42 abstract public class Selector {
43 protected static final Logger log = Log.open(Selector.class);
44 static final L10N L = new L10N(Selector.class);
45
46 protected final static Object NULL = new Object ();
47
48
51 abstract Object evaluate(Message message)
52 throws JMSException ;
53
54 public boolean isMatch(Message message)
55 throws JMSException
56 {
57 Object obj = evaluate(message);
58
59 if (! (obj instanceof Boolean ))
60 return false;
61
62 Boolean bool = (Boolean ) obj;
63
64 return bool.booleanValue();
65 }
66
67 protected static Boolean toBoolean(boolean value)
68 {
69 return value ? Boolean.TRUE : Boolean.FALSE;
70 }
71
72 boolean isBoolean()
73 {
74 return false;
75 }
76
77 boolean isUnknown()
78 {
79 return true;
80 }
81
82 boolean isNumber()
83 {
84 return false;
85 }
86
87 static boolean isDouble(Object obj)
88 {
89 return obj instanceof Double || obj instanceof Float ;
90 }
91
92 static boolean isInteger(Object obj)
93 {
94 return (obj instanceof Integer ||
95 obj instanceof Long ||
96 obj instanceof Short ||
97 obj instanceof Byte );
98 }
99
100 static boolean isNumber(Object obj)
101 {
102 return (obj instanceof Number );
103 }
104
105 protected long toLong(Object obj)
106 throws JMSException
107 {
108 return ObjectConverter.toLong(obj);
109 }
110
111 protected double toDouble(Object obj)
112 throws JMSException
113 {
114 return ObjectConverter.toDouble(obj);
115 }
116 }
117 |
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