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Java > Open Source Codes > freemarker > core > BooleanLiteral


1 /*
2  * Copyright (c) 2003 The Visigoth Software Society. All rights
3  * reserved.
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5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
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10  * notice, this list of conditions and the following disclaimer.
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12  * 2. Redistributions in binary form must reproduce the above copyright
13  * notice, this list of conditions and the following disclaimer in
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15  * distribution.
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17  * 3. The end-user documentation included with the redistribution, if
18  * any, must include the following acknowledgement:
19  * "This product includes software developed by the
20  * Visigoth Software Society (http://www.visigoths.org/)."
21  * Alternately, this acknowledgement may appear in the software itself,
22  * if and wherever such third-party acknowledgements normally appear.
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24  * 4. Neither the name "FreeMarker", "Visigoth", nor any of the names of the
25  * project contributors may be used to endorse or promote products derived
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30  * nor may "FreeMarker" or "Visigoth" appear in their names
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51  */
52
53 package freemarker.core;
54
55 import freemarker.template.*;
56
57 final class BooleanLiteral extends Expression {
58
59     private final boolean val;
60
61     public BooleanLiteral(boolean val) {
62         this.val = val;
63     }
64
65     static TemplateBooleanModel getTemplateModel(boolean b) {
66         return b? TemplateBooleanModel.TRUE : TemplateBooleanModel.FALSE;
67     }
68
69     boolean isTrue(Environment env) {
70         return val;
71     }
72
73     public String JavaDoc getCanonicalForm() {
74         return val ? "true" : "false";
75     }
76
77     public String JavaDoc toString() {
78         return val ? "true" : "false";
79     }
80
81     TemplateModel _getAsTemplateModel(Environment env) {
82         return val ? TemplateBooleanModel.TRUE : TemplateBooleanModel.FALSE;
83     }
84     
85     boolean isLiteral() {
86         return true;
87     }
88
89     Expression _deepClone(String JavaDoc name, Expression subst) {
90         return new BooleanLiteral(val);
91     }
92 }
93
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