//------------------------------------------------------------------------------
// Copyright (c) 2005, 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 implementation
//------------------------------------------------------------------------------
package org.eclipse.epf.diagram.model.impl;

import java.util.Collection;

import org.eclipse.draw2d.geometry.Point;
import org.eclipse.emf.common.notify.Notification;
import org.eclipse.emf.common.notify.NotificationChain;
import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.ecore.EStructuralFeature;
import org.eclipse.emf.ecore.InternalEObject;
import org.eclipse.emf.ecore.util.InternalEList;
import org.eclipse.epf.diagram.model.ActivityDetailDiagram;
import org.eclipse.epf.diagram.model.Link;
import org.eclipse.epf.diagram.model.ModelPackage;
import org.eclipse.epf.diagram.model.Node;
import org.eclipse.epf.diagram.model.WorkProductDescriptorNode;
import org.eclipse.epf.diagram.model.util.GraphicalDataHelper;
import org.eclipse.epf.uma.MethodElement;
import org.eclipse.epf.uma.TaskDescriptor;
import org.eclipse.epf.uma.WorkProductDescriptor;


/**
 * <!-- begin-user-doc --> An implementation of the model object '<em><b>Work Product Descriptor Node</b></em>'.
 * <!-- end-user-doc -->
 * <p>
 * </p>
 *
 * @generated
 */
public class WorkProductDescriptorNodeImpl extends NamedNodeImpl implements
		WorkProductDescriptorNode {
	/**
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 */
	protected WorkProductDescriptorNodeImpl() {
		super();

		methodElementAdapter = new WorkProductDescriptorAdapter();
	}

	/**
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @generated
	 */
	protected EClass eStaticClass() {
		return ModelPackage.Literals.WORK_PRODUCT_DESCRIPTOR_NODE;
	}

	private class WorkProductDescriptorAdapter extends MethodElementAdapter {
		/*
		 * (non-Javadoc)
		 * 
		 * @see org.eclipse.epf.diagram.model.impl.NamedNodeImpl.MethodElementAdapter#notifyChanged(org.eclipse.emf.common.notify.Notification)
		 */
		public void notifyChanged(Notification msg) {
			// already handled by TaskNodeImpl.TaskDescriptorAdapter
			//
			// if(!notificationEnabled) return;
			// notificationEnabled = false;
			// try {
			// MethodElement obj;
			// switch(msg.getFeatureID(WorkProductDescriptor.class)) {
			// case UmaPackage.WORK_PRODUCT_DESCRIPTOR__OUTPUT_FROM:
			// switch(msg.getEventType()) {
			// case Notification.ADD:
			// obj = (MethodElement) msg.getNewValue();
			// addIncomingConnection(obj);
			// return;
			// case Notification.REMOVE:
			// obj = (MethodElement) msg.getOldValue();
			// removeIncomingConnection(obj);
			// return;
			// case Notification.ADD_MANY:
			// Collection collection = (Collection) msg.getNewValue();
			// for (Iterator iter = collection.iterator(); iter
			// .hasNext();) {
			// obj = (MethodElement) iter.next();
			// addIncomingConnection(obj);
			// }
			// return;
			// case Notification.REMOVE_MANY:
			// collection = (Collection) msg.getOldValue();
			// for (Iterator iter = collection.iterator(); iter
			// .hasNext();) {
			// obj = (MethodElement) iter.next();
			// removeIncomingConnection(obj);
			// }
			// return;
			// }
			// break;
			//					
			// }
			// }
			// finally {
			// notificationEnabled = true;
			// }

			super.notifyChanged(msg);

		}

		/*
		 * (non-Javadoc)
		 * 
		 * @see org.eclipse.epf.diagram.model.impl.NamedNodeImpl.MethodElementAdapter#getNode()
		 */
		public Node getNode() {
			return WorkProductDescriptorNodeImpl.this;
		}
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.epf.diagram.model.impl.NamedNodeImpl#findNode(org.eclipse.epf.uma.MethodElement)
	 */
	protected Node findNode(MethodElement linkedElement) {
		return GraphicalDataHelper.findNode(
				(ActivityDetailDiagram) getDiagram(), linkedElement);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.epf.diagram.model.impl.NodeImpl#getMethodElementAdapterType()
	 */
	public Class getMethodElementAdapterType() {
		return WorkProductDescriptorAdapter.class;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.epf.diagram.model.impl.NodeImpl#addToUMA(org.eclipse.epf.diagram.model.Link)
	 */
	protected boolean addToUMA(Link link) {
		if (!super.addToUMA(link))
			return false;

		WorkProductDescriptor wpd = (WorkProductDescriptor) getObject();

		// disable notification of source node before changing the UMA object
		// associated with it
		// so it will not create duplicate links
		//
		NodeImpl nodeImpl = (NodeImpl) link.getSource();
		boolean notify = nodeImpl.notificationEnabled;
		boolean notifyTarget = notificationEnabled;
		try {
			nodeImpl.notificationEnabled = false;
			notificationEnabled = false;
//			wpd.getOutputFrom().add(link.getSource().getObject());
			TaskDescriptor taskDesc = (TaskDescriptor) link.getSource().getObject();
			if(taskDesc != null) {
				taskDesc.getOutput().add(wpd);
			}
		} finally {
			nodeImpl.notificationEnabled = notify;
			notificationEnabled = notifyTarget;
		}

		// TaskDescriptor td = (TaskDescriptor) link.getSource().getObject();
		// td.getOutput().add(getObject());

		return true;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.epf.diagram.model.impl.NodeImpl#removeFromUMA(org.eclipse.epf.diagram.model.Link,
	 *      org.eclipse.epf.diagram.model.Node, org.eclipse.epf.diagram.model.Node)
	 */
	protected void removeFromUMA(Link link, Node oldSource, Node oldTarget) {
		WorkProductDescriptor wpd = (WorkProductDescriptor) getObject();
//		wpd.getMandatoryInputTo().remove(oldTarget.getObject());
		TaskDescriptor taskDesc = (TaskDescriptor) oldTarget.getObject();
		if(taskDesc != null) {
			taskDesc.getMandatoryInput().remove(wpd);
		}

		super.removeFromUMA(link, oldSource, oldTarget);
	}
} // WorkProductDescriptorNodeImpl