/*******************************************************************************
 * Copyright (c) 2006 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.ui.internal.navigator.dnd;

import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.swt.dnd.DropTargetEvent;
import org.eclipse.swt.dnd.TransferData;
import org.eclipse.ui.navigator.CommonDropAdapter;
import org.eclipse.ui.navigator.CommonDropAdapterAssistant;

/**
 * A Skeleton implementation of {@link CommonDropAdapterAssistant}.
 * 
 * @since 3.2
 * 
 */
public class SkeletonCommonDropAssistant extends CommonDropAdapterAssistant {

	/**
	 * The singleton instance.
	 */
	public static final SkeletonCommonDropAssistant INSTANCE = new SkeletonCommonDropAssistant();

	private SkeletonCommonDropAssistant() {
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.navigator.CommonDropAdapterAssistant#handleDrop(org.eclipse.ui.navigator.CommonDropAdapter,
	 *      org.eclipse.swt.dnd.DropTargetEvent, java.lang.Object)
	 */
	public IStatus handleDrop(CommonDropAdapter aDropAdapter,
			DropTargetEvent aDropTargetEvent, Object aTarget) {
		return Status.CANCEL_STATUS;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.navigator.CommonDropAdapterAssistant#validateDrop(java.lang.Object,
	 *      int, org.eclipse.swt.dnd.TransferData)
	 */
	public IStatus validateDrop(Object target, int operation,
			TransferData transferType) {
		return Status.CANCEL_STATUS;
	}

	// /*
	// * (non-Javadoc)
	// *
	// * @see
	// org.eclipse.ui.navigator.CommonDropAdapterAssistant#findSupportedTransferData(org.eclipse.swt.dnd.TransferData[])
	// */
	// public TransferData findSupportedTransferData(
	// TransferData[] theAvailableTransferData) {
	//
	// return null;
	// }

}