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/*****************************************************************************
* Copyright (c) 2014 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:
*
*****************************************************************************/
package org.eclipse.papyrus.uml.alf.properties.xtext.sheet;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.gmf.runtime.diagram.ui.editparts.GraphicalEditPart;
import org.eclipse.jface.viewers.IFilter;
import org.eclipse.papyrus.uml.alf.transaction.observation.listener.filter.FUMLScopeUtil;
import org.eclipse.uml2.uml.Element;
/**
* This class constrains the availability of the embedded ALF editor.
*
* The ALF editor must only be available when:
* 1. The selection is a Class (not composite)
* 2. The selection is an Association
* 3. The selection is a Signal
* 4. The selection is a Datatype
* 5. The selection is an Enumeration
* 6. The selection is a Package
* 7. The selection is an Activity
*/
public class AlfEditorPropertySectionFilter implements IFilter {
/**
* @see org.eclipse.jface.viewers.IFilter#select(java.lang.Object)
*
* @param toTest
*
* @return accepted
*/
public boolean select(Object toTest) {
Element element = this.resolveSemanticElement(toTest);
boolean accepted = false;
if(element!=null){
accepted = this.isValidInput(element);
}
return accepted;
}
/**
* Check the given input and returns true if it is a valid input for the embedded ALF editor
* false otherwise
*
* @param element
* an input element for ALF embedded editor
*
* @return true if element is accepted as an input false otherwise
*/
private boolean isValidInput(Element element){
if(FUMLScopeUtil.isClass(element)){
return true;
}else if(FUMLScopeUtil.isPackage(element)){
return true;
}else if(FUMLScopeUtil.isSignal(element)){
return true;
}else if(FUMLScopeUtil.isEnumeration(element)){
return true;
}else if(FUMLScopeUtil.isDataType(element)){
return true;
}else if(FUMLScopeUtil.isAssociation(element)){
return true;
}else if(FUMLScopeUtil.isActivity(element)){
return true;
}else if(FUMLScopeUtil.isOperationWithImplementation(element)){
return true;
}
return false;
}
/**
* From a selection this methods tries to extract the underlying model element
*
* @param selectedElement
* an object selected in the view (e.g., a class in a diagram)
*
* @return semanticElement
* the model element that is under the graphical element (may be null)
*/
private Element resolveSemanticElement(Object selectedElement){
Element semanticElement = null;
if (selectedElement instanceof IAdaptable) {
semanticElement = (Element) ((IAdaptable) selectedElement).getAdapter(EObject.class);
}
else if (selectedElement instanceof GraphicalEditPart) {
GraphicalEditPart part = (GraphicalEditPart) selectedElement;
semanticElement = (Element)part.resolveSemanticElement();
}
return semanticElement;
}
}
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