/*
* 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.runtime.parser.node.Node;
import org.apache.velocity.runtime.parser.node.SimpleNode;
import org.apache.velocity.runtime.directive.Directive;
import org.apache.velocity.runtime.parser.ParserTreeConstants;
import org.apache.velocity.exception.MethodInvocationException;
import org.apache.velocity.exception.ResourceNotFoundException;
import org.apache.velocity.exception.ParseErrorException;
import org.apache.velocity.runtime.parser.node.ASTReference;
import java.io.Writer;
import java.io.IOException;
import java.util.Map;
import java.util.HashMap;
import java.util.Iterator;
/**
* Simple directive to provide ability to trap a local value for
* iteration.
*
* Ex :
*
* #set($foo = 1)
* $foo
* #local($foo)
* #set($foo = 2)
* $foo
* #end
* $foo
*
* should output
*
* 1
* 2
* 1
*
* @version $Id: LocalDirective.java 463298 2006-10-12 16:10:32Z henning $
*/
public class LocalDirective extends Directive
{
public String getName()
{
return "local";
}
public int getType()
{
return BLOCK;
}
public boolean render(InternalContextAdapter context,
Writer writer, Node node)
throws IOException, MethodInvocationException, ResourceNotFoundException,
ParseErrorException
{
Map data = new HashMap();
int num = node.jjtGetNumChildren();
/*
* get the references
*/
for (int i=0; i < num; i++)
{
SimpleNode child = (SimpleNode) node.jjtGetChild(i);
/*
* if a block, just execute
*/
if (child.getType() == ParserTreeConstants.JJTBLOCK)
{
child.render(context, writer);
break;
}
else
{
/* save the values - for now, just w/ ref to test */
if (child.getType() == ParserTreeConstants.JJTREFERENCE)
{
data.put(child, child.execute(null, context));
}
else
{
System.out.println("unhandled type");
}
}
}
Iterator it = data.keySet().iterator();
while(it.hasNext())
{
ASTReference ref = (ASTReference) it.next();
ref.setValue(context, data.get(ref));
}
return true;
}
}