/*******************************************************************************
* Copyright (c) 2005, 2012 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.bpel.ui.adapters;
import java.util.List;
/**
* Adapter for an Activity which supports IContainer. This class forwards
* the IContainer methods to a delegate which subclasses should supply.
*/
public abstract class ContainerActivityAdapter extends ActivityAdapter implements IContainer {
IContainer containerDelegate = null;
protected final IContainer getContainerDelegate(Object object) {
if (containerDelegate == null) containerDelegate = createContainerDelegate();
return containerDelegate;
}
/**
* Subclasses must override this to create the actual IContainer
* implementation. This method should not return null.
*/
protected abstract IContainer createContainerDelegate();
/* IContainer */
public boolean addChild(Object object, Object child, Object insertBefore) {
return getContainerDelegate(object).addChild(object, child, insertBefore);
}
public List getChildren(Object object) {
return getContainerDelegate(object).getChildren(object);
}
public boolean removeChild(Object object, Object child) {
return getContainerDelegate(object).removeChild(object, child);
}
public boolean replaceChild(Object object, Object oldChild, Object newChild) {
return getContainerDelegate(object).replaceChild(object, oldChild, newChild);
}
public Object getNextSiblingChild(Object object, Object child) {
return getContainerDelegate(object).getNextSiblingChild(object, child);
}
public boolean canAddObject(Object object, Object child, Object insertBefore) {
return getContainerDelegate(object).canAddObject(object, child, insertBefore);
}
public boolean canRemoveChild (Object object, Object child) {
return getContainerDelegate(object).canRemoveChild(object, child);
}
}