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package org.apache.velocity.runtime.parser.node;
/*
* 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.
*/
import org.apache.velocity.context.InternalContextAdapter;
import org.apache.velocity.exception.MethodInvocationException;
import org.apache.velocity.exception.ParseErrorException;
import org.apache.velocity.exception.ResourceNotFoundException;
import org.apache.velocity.exception.TemplateInitException;
import org.apache.velocity.runtime.parser.Parser;
import java.io.IOException;
import java.io.Writer;
/**
* This class is responsible for handling the ElseIf VTL control statement.
*
* Please look at the Parser.jjt file which is
* what controls the generation of this class.
*
* @author <a href="mailto:jvanzyl@apache.org">Jason van Zyl</a>
* @author <a href="mailto:geirm@optonline.net">Geir Magnusson Jr.</a>
* @version $Id$
*/
public class ASTElseIfStatement extends SimpleNode
{
/**
* @param id
*/
public ASTElseIfStatement(int id)
{
super(id);
}
/**
* @param p
* @param id
*/
public ASTElseIfStatement(Parser p, int id)
{
super(p, id);
}
/**
* @throws TemplateInitException
* @see org.apache.velocity.runtime.parser.node.Node#init(org.apache.velocity.context.InternalContextAdapter, java.lang.Object)
*/
@Override
public Object init(InternalContextAdapter context, Object data) throws TemplateInitException
{
Object obj = super.init(context, data);
cleanupParserAndTokens(); // drop reference to Parser and all JavaCC Tokens
return obj;
}
/**
* @see org.apache.velocity.runtime.parser.node.SimpleNode#jjtAccept(org.apache.velocity.runtime.parser.node.ParserVisitor, java.lang.Object)
*/
@Override
public Object jjtAccept(ParserVisitor visitor, Object data)
{
return visitor.visit(this, data);
}
/**
* An ASTElseStatement is true if the expression
* it contains evaluates to true. Expressions know
* how to evaluate themselves, so we do that
* here and return the value back to ASTIfStatement
* where this node was originally asked to evaluate
* itself.
* @param context
* @return True if all children are true.
* @throws MethodInvocationException
*/
@Override
public boolean evaluate (InternalContextAdapter context)
throws MethodInvocationException
{
return jjtGetChild(0).evaluate(context);
}
/**
* @see org.apache.velocity.runtime.parser.node.SimpleNode#render(org.apache.velocity.context.InternalContextAdapter, java.io.Writer)
*/
@Override
public boolean render(InternalContextAdapter context, Writer writer)
throws IOException,MethodInvocationException,
ResourceNotFoundException, ParseErrorException
{
return jjtGetChild(1).render( context, writer );
}
}
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