freemarker.core.ConditionalBlock Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of com.liferay.portal.template.freemarker
Show all versions of com.liferay.portal.template.freemarker
Liferay Portal Template FreeMarker
/*
* 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;
/**
* An element that represents a conditionally executed block: #if, #elseif or #elseif. Note that when an #if has
* related #elseif-s or #else, an {@link IfBlock} parent must be used. For a lonely #if, no such parent is needed.
*/
final class ConditionalBlock extends TemplateElement {
static final int TYPE_IF = 0;
static final int TYPE_ELSE = 1;
static final int TYPE_ELSE_IF = 2;
final Expression condition;
private final int type;
ConditionalBlock(Expression condition, TemplateElements children, int type) {
this.condition = condition;
setChildren(children);
this.type = type;
}
@Override
TemplateElement[] accept(Environment env) throws TemplateException, IOException {
if (condition == null || condition.evalToBoolean(env)) {
return getChildBuffer();
}
return null;
}
@Override
protected String dump(boolean canonical) {
StringBuilder buf = new StringBuilder();
if (canonical) buf.append('<');
buf.append(getNodeTypeSymbol());
if (condition != null) {
buf.append(' ');
buf.append(condition.getCanonicalForm());
}
if (canonical) {
buf.append(">");
buf.append(getChildrenCanonicalForm());
if (!(getParentElement() instanceof IfBlock)) {
buf.append("#if>");
}
}
return buf.toString();
}
@Override
String getNodeTypeSymbol() {
if (type == TYPE_ELSE) {
return "#else";
} else if (type == TYPE_IF) {
return "#if";
} else if (type == TYPE_ELSE_IF) {
return "#elseif";
} else {
throw new BugException("Unknown type");
}
}
@Override
int getParameterCount() {
return 2;
}
@Override
Object getParameterValue(int idx) {
switch (idx) {
case 0: return condition;
case 1: return Integer.valueOf(type);
default: throw new IndexOutOfBoundsException();
}
}
@Override
ParameterRole getParameterRole(int idx) {
switch (idx) {
case 0: return ParameterRole.CONDITION;
case 1: return ParameterRole.AST_NODE_SUBTYPE;
default: throw new IndexOutOfBoundsException();
}
}
@Override
boolean isNestedBlockRepeater() {
return false;
}
}
© 2015 - 2024 Weber Informatics LLC | Privacy Policy