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Java > Open Source Codes > freemarker > core > StopInstruction


1 /*
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10  * notice, this list of conditions and the following disclaimer.
11  *
12  * 2. Redistributions in binary form must reproduce the above copyright
13  * notice, this list of conditions and the following disclaimer in
14  * the documentation and/or other materials provided with the
15  * distribution.
16  *
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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27  * permission, please contact visigoths@visigoths.org.
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52
53 package freemarker.core;
54
55 import freemarker.template.TemplateException;
56
57 /**
58  * Represents a <stop> instruction to abort template processing.
59  * @author <A HREF="mailto:jon@revusky.com">Jonathan Revusky</A>
60  */
61 final class StopInstruction extends TemplateElement {
62
63     private Expression exp;
64
65     StopInstruction(Expression exp) {
66         this.exp = exp;
67     }
68
69     void accept(Environment env) throws TemplateException {
70         if (exp == null) {
71             throw new StopException(env);
72         }
73         throw new StopException(env, exp.getStringValue(env));
74     }
75
76     public String JavaDoc getCanonicalForm() {
77         String JavaDoc expString = exp == null ? "" : " " + exp.getCanonicalForm();
78         return "<#stop" + expString + "/>";
79     }
80
81     public String JavaDoc getDescription() {
82         return "stop" + " [" + getStartLocation() + "]";
83     }
84 }
85
86
87
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