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1
46 package org.mr.api.jms.selector.syntax;
47
48 import javax.jms.Message  ;
49
50
51
55 class Literal implements Expression {
56
57
60 private MantaObject value = null;
61
62
63
68 protected Literal(final MantaObject value) {
69 this.value = value;
70 }
72
73
81 public static Literal approxNumericLiteral(final String text) throws SelectorException {
82
83 MantaDouble value = null;
84 try {
85 value = new MantaDouble(Double.parseDouble(text));
86 } catch (NumberFormatException exception) {
88 throw new SelectorException("invalid float: " + text);
89 } return new Literal(value);
91 }
93
94
102 public static Literal exactNumericLiteral(final String text) throws SelectorException {
103 MantaLong value = null;
104 try {
105 value = new MantaLong(Long.decode(text).longValue());
106 } catch (NumberFormatException exception) {
108 throw new SelectorException("invalid integer: " + text);
109 } return new Literal(value);
111 }
113
114
120 public static Literal stringLiteral(final String text) {
121 return new Literal(new MantaString(text)) {
122
123 public final String toString() {
124 return "'" + this.getValue().toString() + "'";
125 }
126 };
127 }
129
130
136 public static Literal booleanLiteral(final boolean value) {
137 MantaBoolean bool = MantaBoolean.FALSE;
138 if (value) {
139 bool = MantaBoolean.TRUE;
140 } return new Literal(bool);
142 }
144
150 public final MantaObject evaluate(final Message msg) {
151 return value;
152 }
154
155
160 public String toString() {
161 return getValue().toString();
162 }
164
165
170 protected final MantaObject getValue() {
171 return value;
172 }} |
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