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Google App Engine compliant variation of FreeMarker.
FreeMarker is a "template engine"; a generic tool to generate text output based on templates.
/*
* 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 freemarker.template.TemplateException;
/**
* Represents a <stop> instruction to abort template processing.
*/
final class StopInstruction extends TemplateElement {
private Expression exp;
StopInstruction(Expression exp) {
this.exp = exp;
}
void accept(Environment env) throws TemplateException {
if (exp == null) {
throw new StopException(env);
}
throw new StopException(env, exp.evalAndCoerceToString(env));
}
protected String dump(boolean canonical) {
StringBuffer sb = new StringBuffer();
if (canonical) sb.append('<');
sb.append(getNodeTypeSymbol());
if (exp != null) {
sb.append(' ');
sb.append(exp.getCanonicalForm());
}
if (canonical) sb.append("/>");
return sb.toString();
}
String getNodeTypeSymbol() {
return "#stop";
}
int getParameterCount() {
return 1;
}
Object getParameterValue(int idx) {
if (idx != 0) throw new IndexOutOfBoundsException();
return exp;
}
ParameterRole getParameterRole(int idx) {
if (idx != 0) throw new IndexOutOfBoundsException();
return ParameterRole.MESSAGE;
}
}