/*
* Copyright (c) 2012-2016 Marsha Chechik, Alessio Di Sandro, Michalis Famelis,
* Rick Salay.
* 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:
* Alessio Di Sandro - Implementation.
*/
package edu.toronto.cs.se.modelepedia.relationaldatabase.diagram.providers;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.edit.ui.provider.AdapterFactoryLabelProvider;
import org.eclipse.gmf.runtime.diagram.ui.editparts.IGraphicalEditPart;
import org.eclipse.gmf.runtime.emf.type.core.ElementTypeRegistry;
import org.eclipse.gmf.runtime.emf.type.core.IElementType;
import org.eclipse.gmf.runtime.emf.ui.services.modelingassistant.ModelingAssistantProvider;
import org.eclipse.gmf.runtime.notation.Diagram;
import org.eclipse.jface.viewers.ILabelProvider;
import org.eclipse.jface.window.Window;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.dialogs.ElementListSelectionDialog;
import edu.toronto.cs.se.modelepedia.relationaldatabase.diagram.edit.parts.ColumnEditPart;
import edu.toronto.cs.se.modelepedia.relationaldatabase.diagram.edit.parts.ForeignKeyEditPart;
import edu.toronto.cs.se.modelepedia.relationaldatabase.diagram.edit.parts.RelationalDatabaseEditPart;
import edu.toronto.cs.se.modelepedia.relationaldatabase.diagram.edit.parts.TableEditPart;
import edu.toronto.cs.se.modelepedia.relationaldatabase.diagram.part.Messages;
import edu.toronto.cs.se.modelepedia.relationaldatabase.diagram.part.RelationalDatabaseDiagramEditorPlugin;
/**
* @generated
*/
public class RelationalDatabaseModelingAssistantProvider extends
ModelingAssistantProvider {
/**
* @generated
*/
public List getTypesForPopupBar(IAdaptable host) {
IGraphicalEditPart editPart = (IGraphicalEditPart) host
.getAdapter(IGraphicalEditPart.class);
if (editPart instanceof RelationalDatabaseEditPart) {
ArrayList<IElementType> types = new ArrayList<IElementType>(1);
types.add(RelationalDatabaseElementTypes.Table_2001);
return types;
}
if (editPart instanceof TableEditPart) {
ArrayList<IElementType> types = new ArrayList<IElementType>(2);
types.add(RelationalDatabaseElementTypes.Column_3001);
types.add(RelationalDatabaseElementTypes.ForeignKey_3002);
return types;
}
return Collections.EMPTY_LIST;
}
/**
* @generated
*/
public List getRelTypesOnSource(IAdaptable source) {
IGraphicalEditPart sourceEditPart = (IGraphicalEditPart) source
.getAdapter(IGraphicalEditPart.class);
if (sourceEditPart instanceof ForeignKeyEditPart) {
return ((ForeignKeyEditPart) sourceEditPart)
.getMARelTypesOnSource();
}
return Collections.EMPTY_LIST;
}
/**
* @generated
*/
public List getRelTypesOnTarget(IAdaptable target) {
IGraphicalEditPart targetEditPart = (IGraphicalEditPart) target
.getAdapter(IGraphicalEditPart.class);
if (targetEditPart instanceof ColumnEditPart) {
return ((ColumnEditPart) targetEditPart).getMARelTypesOnTarget();
}
return Collections.EMPTY_LIST;
}
/**
* @generated
*/
public List getRelTypesOnSourceAndTarget(IAdaptable source,
IAdaptable target) {
IGraphicalEditPart sourceEditPart = (IGraphicalEditPart) source
.getAdapter(IGraphicalEditPart.class);
IGraphicalEditPart targetEditPart = (IGraphicalEditPart) target
.getAdapter(IGraphicalEditPart.class);
if (sourceEditPart instanceof ForeignKeyEditPart) {
return ((ForeignKeyEditPart) sourceEditPart)
.getMARelTypesOnSourceAndTarget(targetEditPart);
}
return Collections.EMPTY_LIST;
}
/**
* @generated
*/
public List getTypesForSource(IAdaptable target,
IElementType relationshipType) {
IGraphicalEditPart targetEditPart = (IGraphicalEditPart) target
.getAdapter(IGraphicalEditPart.class);
if (targetEditPart instanceof ColumnEditPart) {
return ((ColumnEditPart) targetEditPart)
.getMATypesForSource(relationshipType);
}
return Collections.EMPTY_LIST;
}
/**
* @generated
*/
public List getTypesForTarget(IAdaptable source,
IElementType relationshipType) {
IGraphicalEditPart sourceEditPart = (IGraphicalEditPart) source
.getAdapter(IGraphicalEditPart.class);
if (sourceEditPart instanceof ForeignKeyEditPart) {
return ((ForeignKeyEditPart) sourceEditPart)
.getMATypesForTarget(relationshipType);
}
return Collections.EMPTY_LIST;
}
/**
* @generated
*/
public EObject selectExistingElementForSource(IAdaptable target,
IElementType relationshipType) {
return selectExistingElement(target,
getTypesForSource(target, relationshipType));
}
/**
* @generated
*/
public EObject selectExistingElementForTarget(IAdaptable source,
IElementType relationshipType) {
return selectExistingElement(source,
getTypesForTarget(source, relationshipType));
}
/**
* @generated
*/
protected EObject selectExistingElement(IAdaptable host, Collection types) {
if (types.isEmpty()) {
return null;
}
IGraphicalEditPart editPart = (IGraphicalEditPart) host
.getAdapter(IGraphicalEditPart.class);
if (editPart == null) {
return null;
}
Diagram diagram = (Diagram) editPart.getRoot().getContents().getModel();
HashSet<EObject> elements = new HashSet<EObject>();
for (Iterator<EObject> it = diagram.getElement().eAllContents(); it
.hasNext();) {
EObject element = it.next();
if (isApplicableElement(element, types)) {
elements.add(element);
}
}
if (elements.isEmpty()) {
return null;
}
return selectElement((EObject[]) elements.toArray(new EObject[elements
.size()]));
}
/**
* @generated
*/
protected boolean isApplicableElement(EObject element, Collection types) {
IElementType type = ElementTypeRegistry.getInstance().getElementType(
element);
return types.contains(type);
}
/**
* @generated
*/
protected EObject selectElement(EObject[] elements) {
Shell shell = Display.getCurrent().getActiveShell();
ILabelProvider labelProvider = new AdapterFactoryLabelProvider(
RelationalDatabaseDiagramEditorPlugin.getInstance()
.getItemProvidersAdapterFactory());
ElementListSelectionDialog dialog = new ElementListSelectionDialog(
shell, labelProvider);
dialog.setMessage(Messages.RelationalDatabaseModelingAssistantProviderMessage);
dialog.setTitle(Messages.RelationalDatabaseModelingAssistantProviderTitle);
dialog.setMultipleSelection(false);
dialog.setElements(elements);
EObject selected = null;
if (dialog.open() == Window.OK) {
selected = (EObject) dialog.getFirstResult();
}
return selected;
}
}