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1
28
29 package com.caucho.jms.selector;
30
31 import javax.jms.InvalidSelectorException  ;
32 import javax.jms.JMSException ;
33 import javax.jms.Message ;
34
35
38 public class BooleanBinarySelector extends Selector {
39 private int _token;
40 private Selector _left;
41 private Selector _right;
42
43 BooleanBinarySelector(int token, Selector left, Selector right)
44 throws JMSException
45 {
46 _token = token;
47 _left = left;
48 _right = right;
49
50 switch (_token) {
51 case SelectorParser.LT:
52 case SelectorParser.LE:
53 case SelectorParser.GT:
54 case SelectorParser.GE:
55 if (! _left.isUnknown() && ! _left.isNumber())
56 throw new InvalidSelectorException (L.l("'{0}' must have a numeric value for comparison.",
57 this));
58 if (! _right.isUnknown() && ! _right.isNumber())
59 throw new InvalidSelectorException (L.l("'{0}' must have a numeric value for comparison.",
60 this));
61 break;
62 case SelectorParser.EQ:
63 case SelectorParser.NE:
64 if (_left.isUnknown() || _right.isUnknown()) {
65 }
66 else if (_left.isNumber() != _right.isNumber())
67 throw new InvalidSelectorException (L.l("'{0}' test must have matching types.",
68 this));
69 break;
70
71 case SelectorParser.AND:
72 case SelectorParser.OR:
73 if (! _left.isUnknown() && ! _left.isBoolean())
74 throw new InvalidSelectorException (L.l("'{0}' must have a numeric value for comparison.",
75 this));
76 if (! _right.isUnknown() && ! _right.isBoolean())
77 throw new InvalidSelectorException (L.l("'{0}' must have a numeric value for comparison.",
78 this));
79 break;
80 }
81 }
82
83
86 boolean isBoolean()
87 {
88 return true;
89 }
90
91
94 boolean isUnknown()
95 {
96 return false;
97 }
98
99
103 public Object evaluate(Message message)
104 throws JMSException
105 {
106 Object lvalue = _left.evaluate(message);
107 Object rvalue = _right.evaluate(message);
108
109 if (lvalue == null || rvalue == null)
110 return NULL;
111
112 switch (_token) {
113 case SelectorParser.EQ:
114 if (lvalue instanceof Number && rvalue instanceof Number )
115 return toBoolean(((Number ) lvalue).doubleValue() ==
116 ((Number ) rvalue).doubleValue());
117 else
118 return toBoolean(lvalue.equals(rvalue));
119
120 case SelectorParser.NE:
121 if (lvalue instanceof Number && rvalue instanceof Number )
122 return toBoolean(! (((Number ) lvalue).doubleValue() ==
123 ((Number ) rvalue).doubleValue()));
124 else
125 return toBoolean(! lvalue.equals(rvalue));
126
127 case SelectorParser.LT:
128 if (lvalue instanceof Number && rvalue instanceof Number )
129 return toBoolean(((Number ) lvalue).doubleValue() <
130 ((Number ) rvalue).doubleValue());
131 else
132 return Boolean.FALSE;
133
134 case SelectorParser.LE:
135 if (lvalue instanceof Number && rvalue instanceof Number )
136 return toBoolean(((Number ) lvalue).doubleValue() <=
137 ((Number ) rvalue).doubleValue());
138 else
139 return Boolean.FALSE;
140
141 case SelectorParser.GT:
142 if (lvalue instanceof Number && rvalue instanceof Number )
143 return toBoolean(((Number ) lvalue).doubleValue() >
144 ((Number ) rvalue).doubleValue());
145 else
146 return Boolean.FALSE;
147
148 case SelectorParser.GE:
149 if (lvalue instanceof Number && rvalue instanceof Number )
150 return toBoolean(((Number ) lvalue).doubleValue() >=
151 ((Number ) rvalue).doubleValue());
152 else
153 return Boolean.FALSE;
154
155 case SelectorParser.AND:
156 if (! (lvalue instanceof Boolean ))
157 return NULL;
158 else if (! ((Boolean ) lvalue).booleanValue())
159 return Boolean.FALSE;
160 else if (! (rvalue instanceof Boolean ))
161 return NULL;
162 else if (! ((Boolean ) rvalue).booleanValue())
163 return Boolean.FALSE;
164 else
165 return Boolean.TRUE;
166
167 case SelectorParser.OR:
168 if ((lvalue instanceof Boolean ) && ((Boolean ) lvalue).booleanValue())
169 return Boolean.TRUE;
170 else if ((rvalue instanceof Boolean ) &&
171 ((Boolean ) rvalue).booleanValue())
172 return Boolean.TRUE;
173 else if (lvalue instanceof Boolean || rvalue instanceof Boolean )
174 return Boolean.FALSE;
175 else
176 return NULL;
177
178 default:
179 throw new JMSException ("NOTONE");
180 }
181 }
182
183 public String toString()
184 {
185 switch (_token) {
186 case SelectorParser.EQ:
187 return _left + " = " + _right;
188 case SelectorParser.NE:
189 return _left + " <> " + _right;
190 case SelectorParser.LT:
191 return _left + " < " + _right;
192 case SelectorParser.LE:
193 return _left + " <= " + _right;
194 case SelectorParser.GT:
195 return _left + " > " + _right;
196 case SelectorParser.GE:
197 return _left + " >= " + _right;
198 case SelectorParser.AND:
199 return _left + " AND " + _right;
200 case SelectorParser.OR:
201 return _left + " OR " + _right;
202 default:
203 return super.toString();
204 }
205 }
206 }
207 |
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