/*
 * Copyright (c) 2007 Borland Software Corporation
 * 
 * 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:
 *    Dmitry Stadnik (Borland) - initial API and implementation
 */
package org.eclipse.gmf.examples.taipan.port.diagram.edit.policies;

import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Set;

import org.eclipse.emf.ecore.EObject;
import org.eclipse.gmf.examples.taipan.TaiPanPackage;
import org.eclipse.gmf.examples.taipan.port.diagram.edit.parts.BuildingEditPart;
import org.eclipse.gmf.examples.taipan.port.diagram.part.TaiPanDiagramUpdater;
import org.eclipse.gmf.examples.taipan.port.diagram.part.TaiPanNodeDescriptor;
import org.eclipse.gmf.examples.taipan.port.diagram.part.TaiPanVisualIDRegistry;
import org.eclipse.gmf.runtime.diagram.ui.commands.DeferredLayoutCommand;
import org.eclipse.gmf.runtime.diagram.ui.commands.ICommandProxy;
import org.eclipse.gmf.runtime.diagram.ui.editpolicies.CanonicalConnectionEditPolicy;
import org.eclipse.gmf.runtime.notation.Diagram;
import org.eclipse.gmf.runtime.notation.Edge;
import org.eclipse.gmf.runtime.notation.View;

/**
 * @generated
 */
public class PortCanonicalEditPolicy extends CanonicalConnectionEditPolicy {

	/**
	 * @generated
	 */
	Set myFeaturesToSynchronize;

	/**
	 * @generated
	 */
	protected List getSemanticChildrenList() {
		View viewObject = (View) getHost().getModel();
		List result = new LinkedList();
		for (Iterator it = TaiPanDiagramUpdater.getPort_1000SemanticChildren(viewObject).iterator(); it.hasNext();) {
			result.add(((TaiPanNodeDescriptor) it.next()).getModelElement());
		}
		return result;
	}

	/**
	 * @generated
	 */
	protected boolean shouldDeleteView(View view) {
		return true;
	}

	/**
	 * @generated
	 */
	protected boolean isOrphaned(Collection semanticChildren, final View view) {
		int visualID = TaiPanVisualIDRegistry.getVisualID(view);
		switch (visualID) {
		case BuildingEditPart.VISUAL_ID:
			if (!semanticChildren.contains(view.getElement())) {
				return true;
			}
		}
		return false;
	}

	/**
	 * @generated
	 */
	protected String getDefaultFactoryHint() {
		return null;
	}

	/**
	 * @generated
	 */
	protected Set getFeaturesToSynchronize() {
		if (myFeaturesToSynchronize == null) {
			myFeaturesToSynchronize = new HashSet();
			myFeaturesToSynchronize.add(TaiPanPackage.eINSTANCE.getPort_Buildings());
		}
		return myFeaturesToSynchronize;
	}

	/**
	 * @generated
	 */
	protected List getSemanticConnectionsList() {
		return Collections.EMPTY_LIST;
	}

	/**
	 * @generated
	 */
	protected EObject getSourceElement(EObject relationship) {
		return null;
	}

	/**
	 * @generated
	 */
	protected EObject getTargetElement(EObject relationship) {
		return null;
	}

	/**
	 * @generated
	 */
	protected boolean shouldIncludeConnection(Edge connector, Collection children) {
		return false;
	}

	/**
	 * @generated
	 */
	protected void refreshSemantic() {
		List createdViews = new LinkedList();
		createdViews.addAll(refreshSemanticChildren());
		List createdConnectionViews = new LinkedList();
		createdConnectionViews.addAll(refreshSemanticConnections());

		if (createdViews.size() > 1) {
			// perform a layout of the container
			DeferredLayoutCommand layoutCmd = new DeferredLayoutCommand(host().getEditingDomain(), createdViews, host());
			executeCommand(new ICommandProxy(layoutCmd));
		}

		createdViews.addAll(createdConnectionViews);
		makeViewsImmutable(createdViews);
	}

	/**
	 * @generated
	 */
	private Diagram getDiagram() {
		return ((View) getHost().getModel()).getDiagram();
	}

}