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/*
* 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 freemarker.template.utility.StringUtil;
import java.io.StringReader;
import java.util.StringTokenizer;
/**
* A holder for builtins that operate exclusively on strings.
*/
abstract class StringBuiltins {
abstract static class StringBuiltIn extends BuiltIn {
TemplateModel _getAsTemplateModel(Environment env)
throws TemplateException
{
return calculateResult(target.getStringValue(env), env);
}
abstract TemplateModel calculateResult(String s, Environment env) throws TemplateException;
}
static class capitalizeBI extends StringBuiltIn {
TemplateModel calculateResult(String s, Environment env) {
return new SimpleScalar(StringUtil.capitalize(s));
}
}
static class chop_linebreakBI extends StringBuiltIn {
TemplateModel calculateResult(String s, Environment env) {
return new SimpleScalar(StringUtil.chomp(s));
}
}
static class j_stringBI extends StringBuiltIn {
TemplateModel calculateResult(String s, Environment env) {
return new SimpleScalar(StringUtil.javaStringEnc(s));
}
}
static class js_stringBI extends StringBuiltIn {
TemplateModel calculateResult(String s, Environment env) {
return new SimpleScalar(StringUtil.javaScriptStringEnc(s));
}
}
static class cap_firstBI extends StringBuiltIn {
TemplateModel calculateResult(String s, Environment env) {
int i = 0;
int ln = s.length();
while (i < ln && Character.isWhitespace(s.charAt(i))) {
i++;
}
if (i < ln) {
StringBuffer b = new StringBuffer(s);
b.setCharAt(i, Character.toUpperCase(s.charAt(i)));
s = b.toString();
}
return new SimpleScalar(s);
}
}
static class uncap_firstBI extends StringBuiltIn {
TemplateModel calculateResult(String s, Environment env) {
int i = 0;
int ln = s.length();
while (i < ln && Character.isWhitespace(s.charAt(i))) {
i++;
}
if (i < ln) {
StringBuffer b = new StringBuffer(s);
b.setCharAt(i, Character.toLowerCase(s.charAt(i)));
s = b.toString();
}
return new SimpleScalar(s);
}
}
static class upper_caseBI extends StringBuiltIn {
TemplateModel calculateResult(String s, Environment env)
{
return new SimpleScalar(s.toUpperCase(env.getLocale()));
}
}
static class lower_caseBI extends StringBuiltIn {
TemplateModel calculateResult(String s, Environment env)
{
return new SimpleScalar(s.toLowerCase(env.getLocale()));
}
}
static class word_listBI extends StringBuiltIn {
TemplateModel calculateResult(String s, Environment env) {
SimpleSequence result = new SimpleSequence();
StringTokenizer st = new StringTokenizer(s);
while (st.hasMoreTokens()) {
result.add(st.nextToken());
}
return result;
}
}
static class evalBI extends StringBuiltIn {
TemplateModel calculateResult(String s, Environment env) throws TemplateException
{
SimpleCharStream scs = new SimpleCharStream(
new StringReader("(" + s + ")"), target.beginLine,
target.beginColumn, s.length() + 2);
FMParserTokenManager token_source = new FMParserTokenManager(scs);
token_source.SwitchTo(FMParserConstants.FM_EXPRESSION);
FMParser parser = new FMParser(token_source);
parser.template = getTemplate();
Expression exp = null;
try {
exp = parser.Expression();
} catch (ParseException pe) {
pe.setTemplateName(getTemplate().getName());
throw new TemplateException(pe, env);
}
return exp.getAsTemplateModel(env);
}
}
static class numberBI extends StringBuiltIn {
TemplateModel calculateResult(String s, Environment env) throws TemplateException
{
try {
return new SimpleNumber(env.getArithmeticEngine().toNumber(s));
}
catch(NumberFormatException nfe) {
String mess = "Error: " + getStartLocation()
+ "\nExpecting a number here, found: " + s;
throw new NonNumericalException(mess, env);
}
}
}
static class substringBI extends StringBuiltIn {
TemplateModel calculateResult(final String s, final Environment env) throws TemplateException {
return new TemplateMethodModelEx() {
public Object exec(java.util.List args) throws TemplateModelException {
int argCount = args.size(), left=0, right=0;
if (argCount != 1 && argCount != 2) {
throw new TemplateModelException("Error: +getStartLocation() + \nExpecting 1 or 2 numerical arguments here");
}
try {
TemplateNumberModel tnm = (TemplateNumberModel) args.get(0);
left = tnm.getAsNumber().intValue();
if (argCount == 2) {
tnm = (TemplateNumberModel) args.get(1);
right = tnm.getAsNumber().intValue();
}
} catch (ClassCastException cce) {
String mess = "Error: " + getStartLocation() + "\nExpecting numerical argument here";
throw new TemplateModelException(mess);
}
if (argCount == 1) {
return new SimpleScalar(s.substring(left));
}
return new SimpleScalar(s.substring(left, right));
}
};
}
}
}
