001: /*
002: * Copyright (c) 2003 The Visigoth Software Society. All rights
003: * reserved.
004: *
005: * Redistribution and use in source and binary forms, with or without
006: * modification, are permitted provided that the following conditions
007: * are met:
008: *
009: * 1. Redistributions of source code must retain the above copyright
010: * notice, this list of conditions and the following disclaimer.
011: *
012: * 2. Redistributions in binary form must reproduce the above copyright
013: * notice, this list of conditions and the following disclaimer in
014: * the documentation and/or other materials provided with the
015: * distribution.
016: *
017: * 3. The end-user documentation included with the redistribution, if
018: * any, must include the following acknowledgement:
019: * "This product includes software developed by the
020: * Visigoth Software Society (http://www.visigoths.org/)."
021: * Alternately, this acknowledgement may appear in the software itself,
022: * if and wherever such third-party acknowledgements normally appear.
023: *
024: * 4. Neither the name "FreeMarker", "Visigoth", nor any of the names of the
025: * project contributors may be used to endorse or promote products derived
026: * from this software without prior written permission. For written
027: * permission, please contact visigoths@visigoths.org.
028: *
029: * 5. Products derived from this software may not be called "FreeMarker" or "Visigoth"
030: * nor may "FreeMarker" or "Visigoth" appear in their names
031: * without prior written permission of the Visigoth Software Society.
032: *
033: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
034: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
035: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
036: * DISCLAIMED. IN NO EVENT SHALL THE VISIGOTH SOFTWARE SOCIETY OR
037: * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
038: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
039: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
040: * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
041: * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
042: * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
043: * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
044: * SUCH DAMAGE.
045: * ====================================================================
046: *
047: * This software consists of voluntary contributions made by many
048: * individuals on behalf of the Visigoth Software Society. For more
049: * information on the Visigoth Software Society, please see
050: * http://www.visigoths.org/
051: */
052:
053: package freemarker.core;
054:
055: import freemarker.template.*;
056:
057: /**
058: * A holder for builtins that operate exclusively on TemplateSequenceModels.
059: */
060:
061: abstract class NumericalBuiltins {
062: abstract static class NumberBuiltIn extends BuiltIn {
063: TemplateModel _getAsTemplateModel(Environment env)
064: throws TemplateException {
065: TemplateModel model = target.getAsTemplateModel(env);
066: return calculateResult(EvaluationUtil.getNumber(model,
067: target, env), model);
068: }
069:
070: abstract TemplateModel calculateResult(Number num,
071: TemplateModel model);
072: }
073:
074: static class byteBI extends NumberBuiltIn {
075: TemplateModel calculateResult(Number num, TemplateModel model) {
076: if (num instanceof Byte) {
077: return model;
078: }
079: return new SimpleNumber(new Byte(num.byteValue()));
080: }
081: }
082:
083: static class shortBI extends NumberBuiltIn {
084: TemplateModel calculateResult(Number num, TemplateModel model) {
085: if (num instanceof Short) {
086: return model;
087: }
088: return new SimpleNumber(new Short(num.shortValue()));
089: }
090: }
091:
092: static class intBI extends NumberBuiltIn {
093: TemplateModel calculateResult(Number num, TemplateModel model) {
094: if (num instanceof Integer) {
095: return model;
096: }
097: return new SimpleNumber(num.intValue());
098: }
099: }
100:
101: static class longBI extends NumberBuiltIn {
102: TemplateModel calculateResult(Number num, TemplateModel model) {
103: if (num instanceof Long) {
104: return model;
105: }
106: return new SimpleNumber(num.longValue());
107: }
108: }
109:
110: static class floatBI extends NumberBuiltIn {
111: TemplateModel calculateResult(Number num, TemplateModel model) {
112: if (num instanceof Float) {
113: return model;
114: }
115: return new SimpleNumber(num.floatValue());
116: }
117: }
118:
119: static class doubleBI extends NumberBuiltIn {
120: TemplateModel calculateResult(Number num, TemplateModel model) {
121: if (num instanceof Double) {
122: return model;
123: }
124: return new SimpleNumber(num.doubleValue());
125: }
126: }
127:
128: static class cBI extends NumberBuiltIn {
129:
130: TemplateModel calculateResult(Number num, TemplateModel model) {
131: return new SimpleScalar(num.toString());
132: }
133:
134: }
135:
136: }
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