/*******************************************************************************
 * Copyright (c) 2003, 2005 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.jst.j2ee.navigator.internal.dnd;

import java.util.Iterator;

import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.NullProgressMonitor;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.swt.dnd.TransferData;
import org.eclipse.ui.navigator.CommonDropAdapter;
import org.eclipse.ui.part.IDropActionDelegate;
import org.eclipse.wst.common.frameworks.datamodel.IDataModel;
import org.eclipse.wst.common.frameworks.internal.AdaptabilityUtility;

/**
 * @author jsholl
 *  
 */
public abstract class AddProjectToEarDropAction implements IDropActionDelegate{

	public AddProjectToEarDropAction() {
		super();
	}

	public boolean validateDrop(CommonDropAdapter dropAdapter, Object target, int operation, TransferData transferType) {
		return false;
		//TODO switch to components
//		if (LocalSelectionTransfer.getInstance().isSupportedType(transferType) || PluginTransfer.getInstance().isSupportedType(transferType)) {
//			IProject earProject = (IProject) AdaptabilityUtility.getAdapter(target, IProject.class);
//			if (null == earProject || !earProject.isAccessible()) {
//				return false;
//			}
//			
//			int earVersion = earNature.getApplication().getJ2EEVersionID();
//
//			ISelection selection = LocalSelectionTransfer.getInstance().getSelection();
//			if (selection == null || !(selection instanceof IStructuredSelection)) {
//				return false;
//			}
//			IStructuredSelection structuredSelection = (IStructuredSelection) selection;
//			if (structuredSelection.isEmpty()) {
//				return false;
//			}
//			Object key = new Object();
//			EAREditModel editModel = null;
//			try {
//				editModel = earNature.getEarEditModelForRead(key);
//				Iterator iterator = structuredSelection.iterator();
//				while (iterator.hasNext()) {
//					Object next = iterator.next();
//					IProject projectToAdd = (IProject) AdaptabilityUtility.getAdapter(next, IProject.class);
//					if (null == projectToAdd || !projectToAdd.isAccessible()) {
//						return false;
//					}
//
//					if (!validateProjectToAdd(projectToAdd, earVersion)) {
//						return false;
//					}
//
//					if (editModel.hasMappingToProject(projectToAdd)) {
//						return false;
//					}
//				}
//			} finally {
//				if (null != editModel) {
//					editModel.releaseAccess(key);
//				}
//			}
//			return true;
//		}
//		return false;
	}

	protected abstract boolean validateProjectToAdd(IProject projectToAdd, int earVersion);

	protected abstract IDataModel getDataModel(IProject earProject, IProject projectToAdd);

	protected void doInit() {
		//default nothing
	}

	public boolean run(Object source, Object target) {
		if (source instanceof IStructuredSelection)
			return run((IStructuredSelection) source, (IProject) AdaptabilityUtility.getAdapter(target, IProject.class));
		return false;
	}

	public boolean run(CommonDropAdapter dropAdapter, Object source, Object target) {
		return run(source, target);
	}

	protected boolean run(IStructuredSelection selection, IProject earProject) {
		if (selection == null || selection.isEmpty() || earProject == null || !earProject.isAccessible())
			return false;

		for (Iterator selectionIterator = selection.iterator(); selectionIterator.hasNext();) {
			Object sourceObject = selectionIterator.next();

			IProject projectToAdd = (IProject) AdaptabilityUtility.getAdapter(sourceObject, IProject.class);
			if (projectToAdd != null) {
				try {
					IDataModel dataModel = getDataModel(earProject, projectToAdd);
					dataModel.getDefaultOperation().execute(new NullProgressMonitor(),null);
				} catch (Exception e) {
					//NavigatorPlugin.log(e.toString());
				} 
			}
		}
		return true;
	}

}