/**
* Copyright (c) 2014 committers of YAKINDU 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:
* committers of YAKINDU - initial API and implementation
*
*/
package org.yakindu.sct.ui.editor.propertysheets;
import org.eclipse.core.databinding.UpdateValueStrategy;
import org.eclipse.core.databinding.observable.value.IObservableValue;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.emf.databinding.EMFDataBindingContext;
import org.eclipse.emf.databinding.EMFUpdateValueStrategy;
import org.eclipse.emf.workspace.util.WorkspaceSynchronizer;
import org.eclipse.gmf.runtime.common.ui.resources.FileModificationValidator;
import org.eclipse.swt.widgets.Shell;
import org.yakindu.sct.model.sgraph.util.ContextElementAdapter.IContextElementProvider;
/**
* Checks the file modification flag before updating the model.
*
* @author andreas muelder - Initial contribution and API
*
*/
public class ValidatingEMFDatabindingContext extends EMFDataBindingContext {
private IContextElementProvider elementProvider;
private Shell shell;
public ValidatingEMFDatabindingContext(IContextElementProvider elementProvider, Shell shell) {
this.elementProvider = elementProvider;
this.shell = shell;
}
protected IStatus isWriteable() {
IFile file = WorkspaceSynchronizer.getFile(elementProvider.getContextObject().eResource());
return FileModificationValidator.getInstance().validateEdit(new IFile[] { file }, shell);
}
@Override
protected UpdateValueStrategy createTargetToModelUpdateValueStrategy(IObservableValue fromValue,
IObservableValue toValue) {
return new EMFUpdateValueStrategy() {
@Override
protected IStatus doSet(IObservableValue observableValue, Object value) {
IStatus writeableStatus = isWriteable();
if (!writeableStatus.isOK())
return writeableStatus;
return super.doSet(observableValue, value);
}
};
}
}