// Copyright 2004, 2005 The Apache Software Foundation
//
// 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 org.apache.tapestry.components;
import org.apache.tapestry.AbstractComponent;
import org.apache.tapestry.IMarkupWriter;
import org.apache.tapestry.IRender;
import org.apache.tapestry.IRequestCycle;
/**
* A component which delegates it's behavior to another object.
*
* [<a href="../../../../../ComponentReference/Delegator.html">Component Reference</a>]
*
* @author Howard Lewis Ship
*
**/
public abstract class Delegator extends AbstractComponent
{
/**
* Gets its delegate and invokes {@link IRender#render(IMarkupWriter, IRequestCycle)}
* on it.
*
**/
protected void renderComponent(IMarkupWriter writer, IRequestCycle cycle)
{
IRender delegate = getDelegate();
if (delegate != null)
delegate.render(writer, cycle);
}
public abstract IRender getDelegate();
}