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Java > Open Source Codes > freemarker > core > NumericalBuiltins


1 /*
2  * Copyright (c) 2003 The Visigoth Software Society. All rights
3  * reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  *
9  * 1. Redistributions of source code must retain the above copyright
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.
23  *
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
26  * from this software without prior written permission. For written
27  * permission, please contact visigoths@visigoths.org.
28  *
29  * 5. Products derived from this software may not be called "FreeMarker" or "Visigoth"
30  * nor may "FreeMarker" or "Visigoth" appear in their names
31  * without prior written permission of the Visigoth Software Society.
32  *
33  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
34  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
35  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
36  * DISCLAIMED. IN NO EVENT SHALL THE VISIGOTH SOFTWARE SOCIETY OR
37  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
38  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
39  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
40  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
41  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
42  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
43  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
44  * SUCH DAMAGE.
45  * ====================================================================
46  *
47  * This software consists of voluntary contributions made by many
48  * individuals on behalf of the Visigoth Software Society. For more
49  * information on the Visigoth Software Society, please see
50  * http://www.visigoths.org/
51  */

52
53 package freemarker.core;
54
55 import freemarker.template.*;
56
57 /**
58  * A holder for builtins that operate exclusively on TemplateSequenceModels.
59  */

60
61 abstract class NumericalBuiltins {
62     abstract static class NumberBuiltIn extends BuiltIn {
63         TemplateModel _getAsTemplateModel(Environment env)
64                 throws TemplateException
65         {
66             TemplateModel model = target.getAsTemplateModel(env);
67             return calculateResult(EvaluationUtil.getNumber(model, target, env), model);
68         }
69         abstract TemplateModel calculateResult(Number JavaDoc num, TemplateModel model);
70     }
71
72     static class byteBI extends NumberBuiltIn {
73         TemplateModel calculateResult(Number JavaDoc num, TemplateModel model) {
74             if (num instanceof Byte JavaDoc) {
75                 return model;
76             }
77             return new SimpleNumber(new Byte JavaDoc(num.byteValue()));
78         }
79     }
80
81     static class shortBI extends NumberBuiltIn {
82         TemplateModel calculateResult(Number JavaDoc num, TemplateModel model) {
83             if (num instanceof Short JavaDoc) {
84                 return model;
85             }
86             return new SimpleNumber(new Short JavaDoc(num.shortValue()));
87         }
88     }
89
90     static class intBI extends NumberBuiltIn {
91         TemplateModel calculateResult(Number JavaDoc num, TemplateModel model) {
92             if (num instanceof Integer JavaDoc) {
93                 return model;
94             }
95             return new SimpleNumber(num.intValue());
96         }
97     }
98
99     static class longBI extends NumberBuiltIn {
100         TemplateModel calculateResult(Number JavaDoc num, TemplateModel model) {
101             if (num instanceof Long JavaDoc) {
102                 return model;
103             }
104             return new SimpleNumber(num.longValue());
105         }
106     }
107
108     static class floatBI extends NumberBuiltIn {
109         TemplateModel calculateResult(Number JavaDoc num, TemplateModel model) {
110             if (num instanceof Float JavaDoc) {
111                 return model;
112             }
113             return new SimpleNumber(num.floatValue());
114         }
115     }
116
117     static class doubleBI extends NumberBuiltIn {
118         TemplateModel calculateResult(Number JavaDoc num, TemplateModel model) {
119             if (num instanceof Double JavaDoc) {
120                 return model;
121             }
122             return new SimpleNumber(num.doubleValue());
123         }
124     }
125     
126     static class cBI extends NumberBuiltIn {
127
128         TemplateModel calculateResult(Number JavaDoc num, TemplateModel model) {
129             return new SimpleScalar(num.toString());
130         }
131         
132     }
133     
134 }
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