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/*****************************************************************************
* Copyright (c) 2010 CEA LIST.
*
* 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:
* Camille Letavernier (CEA LIST) camille.letavernier@cea.fr - Initial API and implementation
*****************************************************************************/
package org.eclipse.papyrus.infra.ui.emf.databinding;
import org.eclipse.core.databinding.observable.Realm;
import org.eclipse.emf.common.command.Command;
import org.eclipse.emf.common.command.CompoundCommand;
import org.eclipse.emf.databinding.EObjectObservableValue;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EReference;
import org.eclipse.emf.ecore.EStructuralFeature;
import org.eclipse.emf.edit.command.DeleteCommand;
import org.eclipse.emf.edit.command.SetCommand;
import org.eclipse.emf.edit.domain.EditingDomain;
import org.eclipse.papyrus.infra.emf.utils.EMFHelper;
/**
* An Observable value to edit EMF values through EMF commands.
*
* @author Camille Letavernier
*/
public class EMFObservableValue extends EObjectObservableValue {
/**
* The editing domain on which the commands will be executed
*/
protected EditingDomain domain;
/**
*
* Constructor.
*
* @param eObject
* The eObject being edited
* @param eStructuralFeature
* The structuralFeature being edited
* @param domain
* The Editing domain on which the commands will be executed
*/
public EMFObservableValue(EObject eObject, EStructuralFeature eStructuralFeature, EditingDomain domain) {
this(Realm.getDefault(), eObject, eStructuralFeature, domain);
}
/**
*
* Constructor.
*
* @param realm
* @param eObject
* The eObject being edited
* @param eStructuralFeature
* The structuralFeature being edited
* @param domain
* The Editing domain on which the commands will be executed
*/
public EMFObservableValue(Realm realm, EObject eObject, EStructuralFeature eStructuralFeature, EditingDomain domain) {
super(realm, eObject, eStructuralFeature);
this.domain = domain;
}
@Override
protected void doSetValue(Object value) {
EObject eObject = EMFHelper.getEObject(value);
if (eObject != null) {
value = eObject;
}
Command command = getSetCommand(value);
domain.getCommandStack().execute(command);
}
/**
* Returns the command used to edit the value
*
* @param value
* The new value
* @return
* The Set command used to edit the value
*/
protected Command getSetCommand(Object value) {
Object oldValue = getValue();
CompoundCommand cc = new CompoundCommand("Edit value"); //$NON-NLS-1$
if (oldValue instanceof EObject && eStructuralFeature instanceof EReference && ((EReference) eStructuralFeature).isContainment()) {
cc.append(DeleteCommand.create(domain, oldValue));
}
cc.append(new SetCommand(domain, eObject, eStructuralFeature, value));
return cc;
}
}
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