/*
* Copyright 2014 Attila Szegedi, Daniel Dekany, Jonathan Revusky
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package freemarker.core;
import java.io.StringReader;
import freemarker.template.SimpleNumber;
import freemarker.template.TemplateBooleanModel;
import freemarker.template.TemplateException;
import freemarker.template.TemplateModel;
class BuiltInsForStringsMisc {
static class booleanBI extends BuiltInForString {
@Override
TemplateModel calculateResult(String s, Environment env) throws TemplateException {
final boolean b;
if (s.equals("true")) {
b = true;
} else if (s.equals("false")) {
b = false;
} else if (s.equals(env.getTrueStringValue())) {
b = true;
} else if (s.equals(env.getFalseStringValue())) {
b = false;
} else {
throw new _MiscTemplateException(this, env,
"Can't convert this string to boolean: ", new _DelayedJQuote(s));
}
return b ? TemplateBooleanModel.TRUE : TemplateBooleanModel.FALSE;
}
}
static class evalBI extends BuiltInForOutputFormatRelated {
@Override
protected TemplateModel calculateResult(Environment env) throws TemplateException {
return calculateResult(BuiltInForString.getTargetString(target, env), env);
}
TemplateModel calculateResult(String s, Environment env) throws TemplateException {
UnboundTemplate parentTemplate = getUnboundTemplate();
Expression exp = null;
try {
try {
FMParserTokenManager tkMan = new FMParserTokenManager(
new SimpleCharStream(
new StringReader("(" + s + ")"),
RUNTIME_EVAL_LINE_DISPLACEMENT, 1,
s.length() + 2));
tkMan.SwitchTo(FMParserConstants.FM_EXPRESSION);
ParserConfiguration pCfg = parentTemplate.getParserConfiguration();
// pCfg.outputFormat is exceptional: it's inherited from the lexical context
if (pCfg.getOutputFormat() != outputFormat) {
pCfg = new _ParserConfigurationWithInheritedFormat(pCfg, outputFormat, null);
}
FMParser parser = new FMParser(
parentTemplate, false, tkMan, null, pCfg);
exp = parser.Expression();
} catch (TokenMgrError e) {
throw e.toParseException(parentTemplate);
}
} catch (ParseException e) {
throw new _MiscTemplateException(this, env,
"Failed to \"?", key, "\" string with this error:\n\n",
MessageUtil.EMBEDDED_MESSAGE_BEGIN,
new _DelayedGetMessage(e),
MessageUtil.EMBEDDED_MESSAGE_END,
"\n\nThe failing expression:");
}
try {
return exp.eval(env);
} catch (TemplateException e) {
throw new _MiscTemplateException(this, env,
"Failed to \"?", key, "\" string with this error:\n\n",
MessageUtil.EMBEDDED_MESSAGE_BEGIN,
new _DelayedGetMessageWithoutStackTop(e),
MessageUtil.EMBEDDED_MESSAGE_END,
"\n\nThe failing expression:");
}
}
}
static class numberBI extends BuiltInForString {
@Override
TemplateModel calculateResult(String s, Environment env) throws TemplateException {
try {
return new SimpleNumber(env.getArithmeticEngine().toNumber(s));
} catch (NumberFormatException nfe) {
throw NonNumericalException.newMalformedNumberException(this, s, env);
}
}
}
// Can't be instantiated
private BuiltInsForStringsMisc() { }
}