freemarker.core.AttemptBlock Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.IOException;
import freemarker.template.TemplateException;
/**
* Holder for the attempted section of the #attempt element and of the nested #recover element ({@link RecoveryBlock}).
*/
final class AttemptBlock extends TemplateElement {
private TemplateElement attemptedSection;
private RecoveryBlock recoverySection;
AttemptBlock(TemplateElements attemptedSectionChildren, RecoveryBlock recoverySection) {
TemplateElement attemptedSection = attemptedSectionChildren.asSingleElement();
this.attemptedSection = attemptedSection;
this.recoverySection = recoverySection;
setChildBufferCapacity(2);
addChild(attemptedSection); // for backward compatibility
addChild(recoverySection);
}
@Override
TemplateElement[] accept(Environment env) throws TemplateException, IOException {
env.visitAttemptRecover(this, attemptedSection, recoverySection);
return null;
}
@Override
protected String dump(boolean canonical) {
if (!canonical) {
return getNodeTypeSymbol();
} else {
StringBuilder buf = new StringBuilder();
buf.append("<").append(getNodeTypeSymbol()).append(">");
buf.append(getChildrenCanonicalForm());
buf.append("");
return buf.toString();
}
}
@Override
int getParameterCount() {
return 1;
}
@Override
Object getParameterValue(int idx) {
if (idx != 0) throw new IndexOutOfBoundsException();
return recoverySection;
}
@Override
ParameterRole getParameterRole(int idx) {
if (idx != 0) throw new IndexOutOfBoundsException();
return ParameterRole.ERROR_HANDLER;
}
@Override
String getNodeTypeSymbol() {
return "#attempt";
}
@Override
boolean isNestedBlockRepeater() {
return false;
}
}