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CookCC - a Lexer / Parser (LALR(1)) Project
/*
* Copyright (c) 2003 The Visigoth Software Society. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowledgement:
* "This product includes software developed by the
* Visigoth Software Society (http://www.visigoths.org/)."
* Alternately, this acknowledgement may appear in the software itself,
* if and wherever such third-party acknowledgements normally appear.
*
* 4. Neither the name "FreeMarker", "Visigoth", nor any of the names of the
* project contributors may be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact [email protected].
*
* 5. Products derived from this software may not be called "FreeMarker" or "Visigoth"
* nor may "FreeMarker" or "Visigoth" appear in their names
* without prior written permission of the Visigoth Software Society.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE VISIGOTH SOFTWARE SOCIETY OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Visigoth Software Society. For more
* information on the Visigoth Software Society, please see
* http://www.visigoths.org/
*/
package freemarker.core;
import freemarker.template.*;
import java.math.BigDecimal;
/**
* A holder for builtins that operate exclusively on TemplateSequenceModels.
*/
abstract class NumericalBuiltins {
abstract static class NumberBuiltIn extends BuiltIn {
TemplateModel _getAsTemplateModel(Environment env)
throws TemplateException
{
TemplateModel model = target.getAsTemplateModel(env);
return calculateResult(EvaluationUtil.getNumber(model, target, env), model);
}
abstract TemplateModel calculateResult(Number num, TemplateModel model);
}
static class byteBI extends NumberBuiltIn {
TemplateModel calculateResult(Number num, TemplateModel model) {
if (num instanceof Byte) {
return model;
}
return new SimpleNumber(new Byte(num.byteValue()));
}
}
static class shortBI extends NumberBuiltIn {
TemplateModel calculateResult(Number num, TemplateModel model) {
if (num instanceof Short) {
return model;
}
return new SimpleNumber(new Short(num.shortValue()));
}
}
static class intBI extends NumberBuiltIn {
TemplateModel calculateResult(Number num, TemplateModel model) {
if (num instanceof Integer) {
return model;
}
return new SimpleNumber(num.intValue());
}
}
static class longBI extends NumberBuiltIn {
TemplateModel calculateResult(Number num, TemplateModel model) {
if (num instanceof Long) {
return model;
}
return new SimpleNumber(num.longValue());
}
}
static class floatBI extends NumberBuiltIn {
TemplateModel calculateResult(Number num, TemplateModel model) {
if (num instanceof Float) {
return model;
}
return new SimpleNumber(num.floatValue());
}
}
static class doubleBI extends NumberBuiltIn {
TemplateModel calculateResult(Number num, TemplateModel model) {
if (num instanceof Double) {
return model;
}
return new SimpleNumber(num.doubleValue());
}
}
private static final BigDecimal BIG_DECIMAL_ONE = new BigDecimal("1");
static class floorBI extends NumberBuiltIn {
TemplateModel calculateResult(Number num, TemplateModel model) {
return new SimpleNumber(new BigDecimal(num.doubleValue()).divide(BIG_DECIMAL_ONE, 0, BigDecimal.ROUND_FLOOR));
}
}
static class ceilingBI extends NumberBuiltIn {
TemplateModel calculateResult(Number num, TemplateModel model) {
return new SimpleNumber(new BigDecimal(num.doubleValue()).divide(BIG_DECIMAL_ONE, 0, BigDecimal.ROUND_CEILING));
}
}
static class roundBI extends NumberBuiltIn {
private static final BigDecimal half = new BigDecimal("0.5");
TemplateModel calculateResult(Number num, TemplateModel model) {
return new SimpleNumber(new BigDecimal(num.doubleValue()).add(half).divide(BIG_DECIMAL_ONE, 0, BigDecimal.ROUND_FLOOR));
}
}
// Doesn't extend NumberBuiltIn because "calculateResult" would need the Environment.
static class cBI extends BuiltIn {
TemplateModel _getAsTemplateModel(Environment env)
throws TemplateException
{
TemplateModel model = target.getAsTemplateModel(env);
Number num = EvaluationUtil.getNumber(model, target, env);
if (num instanceof Integer) {
// We accelerate this fairly common case
return new SimpleScalar(num.toString());
} else {
return new SimpleScalar(env.getCNumberFormat().format(num));
}
}
}
}