bundles/org.eclipse.ui.views/src/org/eclipse/ui/views/tasklist/DefaultTaskListResourceAdapter.java

/************************************************************************
Copyright (c) 2002 IBM Corporation and others.
All rights reserved.   This program and the accompanying materials
are made available under the terms of the Common Public License v1.0
which accompanies this distribution, and is available at
http://www.eclipse.org/legal/cpl-v10.html

Contributors:
	IBM - Initial implementation
************************************************************************/

package org.eclipse.ui.views.tasklist;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.IAdaptable;

/**
 * The DefaultTaskListResourceAdapter is the default
 * implementation of the ITaskListResourceAdapter used by the
 * TaskList for resource adaption.
 */
class DefaultTaskListResourceAdapter implements ITaskListResourceAdapter {
	
	private static ITaskListResourceAdapter singleton;

	/**
	 * Constructor for DefaultTaskListResourceAdapter.
	 */
	DefaultTaskListResourceAdapter() {
		super();
	}
	
	/**
	 * Return the default instance used for TaskList adapting.
	 */
	static ITaskListResourceAdapter getDefault(){
		if(singleton == null)
			singleton = new DefaultTaskListResourceAdapter();
		return singleton;
	}

	/*
	 * @see ITaskListResourceAdapter#getAffectedResource(IAdaptable)
	 */
	public IResource getAffectedResource(IAdaptable adaptable) {

		IResource resource = (IResource) adaptable.getAdapter(IResource.class);
		if (resource == null)
			return (IFile) adaptable.getAdapter(IFile.class);
		else
			return resource;

	}

}