/*****************************************************************************
* Copyright (c) 2011 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:
* Vincent Lorenzo (CEA LIST) vincent.lorenzo@cea.fr - Initial API and implementation
*****************************************************************************/
package org.eclipse.papyrus.uml.diagram.menu.providers;
import java.util.Iterator;
import org.eclipse.core.expressions.PropertyTester;
import org.eclipse.gmf.runtime.notation.Diagram;
import org.eclipse.jface.viewers.IStructuredSelection;
public class DiagramPropertyTester extends PropertyTester {
/** property to test if the selected element are open in the editor */
public static final String IS_DIAGRAM = "isDiagram"; //$NON-NLS-1$
/**
*
* {@inheritDoc}
*/
public boolean test(Object receiver, String property, Object[] args, Object expectedValue) {
if(IS_DIAGRAM.equals(property) && receiver instanceof IStructuredSelection) {
boolean answer = isDiagram((IStructuredSelection)receiver);
return new Boolean(answer).equals(expectedValue);
}
return false;
}
/**
* Tests the selection in order to know if it contains only {@link Diagram}
*
* @param selection
* @return
* <code>true</code> if the selection is composed by {@link Diagram}
*/
private boolean isDiagram(IStructuredSelection selection) {
if(!selection.isEmpty()) {
Iterator<?> iter = selection.iterator();
while(iter.hasNext()) {
if(!(iter.next() instanceof Diagram)) {
return false;
}
}
return true;
}
return false;
}
}