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/***************************************************************************
* Copyright (c) 2007 Conselleria de Infraestructuras y Transporte,
* Generalitat de la Comunitat Valenciana . 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: Gabriel Merin Cubero (Prodevelop) – Sequence Diagram implementation
*
******************************************************************************/
package org.eclipse.papyrus.diagram.sequence.providers;
import java.lang.ref.WeakReference;
import org.eclipse.gef.EditPart;
import org.eclipse.gef.EditPartFactory;
import org.eclipse.gmf.runtime.common.core.service.IOperation;
import org.eclipse.gmf.runtime.diagram.ui.editparts.IGraphicalEditPart;
import org.eclipse.gmf.runtime.diagram.ui.services.editpart.AbstractEditPartProvider;
import org.eclipse.gmf.runtime.diagram.ui.services.editpart.CreateGraphicEditPartOperation;
import org.eclipse.gmf.runtime.diagram.ui.services.editpart.IEditPartOperation;
import org.eclipse.gmf.runtime.notation.View;
import org.eclipse.papyrus.diagram.sequence.edit.parts.PackageEditPart;
import org.eclipse.papyrus.diagram.sequence.edit.parts.UMLEditPartFactory;
import org.eclipse.papyrus.diagram.sequence.part.UMLVisualIDRegistry;
/**
* @generated
*/
public class UMLEditPartProvider extends AbstractEditPartProvider {
/**
* @generated
*/
private EditPartFactory factory;
/**
* @generated
*/
private boolean allowCaching;
/**
* @generated
*/
private WeakReference cachedPart;
/**
* @generated
*/
private WeakReference cachedView;
/**
* @generated
*/
public UMLEditPartProvider() {
setFactory(new UMLEditPartFactory());
setAllowCaching(true);
}
/**
* @generated
*/
public final EditPartFactory getFactory() {
return factory;
}
/**
* @generated
*/
protected void setFactory(EditPartFactory factory) {
this.factory = factory;
}
/**
* @generated
*/
public final boolean isAllowCaching() {
return allowCaching;
}
/**
* @generated
*/
protected synchronized void setAllowCaching(boolean allowCaching) {
this.allowCaching = allowCaching;
if (!allowCaching) {
cachedPart = null;
cachedView = null;
}
}
/**
* @generated
*/
protected IGraphicalEditPart createEditPart(View view) {
EditPart part = factory.createEditPart(null, view);
if (part instanceof IGraphicalEditPart) {
return (IGraphicalEditPart) part;
}
return null;
}
/**
* @generated
*/
protected IGraphicalEditPart getCachedPart(View view) {
if (cachedView != null && cachedView.get() == view) {
return (IGraphicalEditPart) cachedPart.get();
}
return null;
}
/**
* @generated
*/
@Override
public synchronized IGraphicalEditPart createGraphicEditPart(View view) {
if (isAllowCaching()) {
IGraphicalEditPart part = getCachedPart(view);
cachedPart = null;
cachedView = null;
if (part != null) {
return part;
}
}
return createEditPart(view);
}
/**
* @generated
*/
@Override
public synchronized boolean provides(IOperation operation) {
if (operation instanceof CreateGraphicEditPartOperation) {
View view = ((IEditPartOperation) operation).getView();
if (!PackageEditPart.MODEL_ID.equals(UMLVisualIDRegistry
.getModelID(view))) {
return false;
}
if (isAllowCaching() && getCachedPart(view) != null) {
return true;
}
IGraphicalEditPart part = createEditPart(view);
if (part != null) {
if (isAllowCaching()) {
cachedPart = new WeakReference(part);
cachedView = new WeakReference(view);
}
return true;
}
}
return false;
}
}
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