/*
* 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.edit.policies;
import java.util.Iterator;
import org.eclipse.emf.ecore.EAnnotation;
import org.eclipse.gef.commands.Command;
import org.eclipse.gmf.runtime.diagram.core.commands.DeleteCommand;
import org.eclipse.gmf.runtime.emf.commands.core.command.CompositeTransactionalCommand;
import org.eclipse.gmf.runtime.emf.type.core.commands.DestroyElementCommand;
import org.eclipse.gmf.runtime.emf.type.core.commands.DestroyReferenceCommand;
import org.eclipse.gmf.runtime.emf.type.core.requests.CreateRelationshipRequest;
import org.eclipse.gmf.runtime.emf.type.core.requests.DestroyElementRequest;
import org.eclipse.gmf.runtime.emf.type.core.requests.DestroyReferenceRequest;
import org.eclipse.gmf.runtime.emf.type.core.requests.ReorientReferenceRelationshipRequest;
import org.eclipse.gmf.runtime.notation.Edge;
import org.eclipse.gmf.runtime.notation.View;
import edu.toronto.cs.se.modelepedia.relationaldatabase.diagram.edit.commands.ForeignKeyForeignColumnCreateCommand;
import edu.toronto.cs.se.modelepedia.relationaldatabase.diagram.edit.commands.ForeignKeyForeignColumnReorientCommand;
import edu.toronto.cs.se.modelepedia.relationaldatabase.diagram.edit.commands.ForeignKeyTableColumnCreateCommand;
import edu.toronto.cs.se.modelepedia.relationaldatabase.diagram.edit.commands.ForeignKeyTableColumnReorientCommand;
import edu.toronto.cs.se.modelepedia.relationaldatabase.diagram.edit.parts.ForeignKeyForeignColumnEditPart;
import edu.toronto.cs.se.modelepedia.relationaldatabase.diagram.edit.parts.ForeignKeyTableColumnEditPart;
import edu.toronto.cs.se.modelepedia.relationaldatabase.diagram.part.RelationalDatabaseVisualIDRegistry;
import edu.toronto.cs.se.modelepedia.relationaldatabase.diagram.providers.RelationalDatabaseElementTypes;
/**
* @generated
*/
public class ColumnItemSemanticEditPolicy extends
RelationalDatabaseBaseItemSemanticEditPolicy {
/**
* @generated
*/
public ColumnItemSemanticEditPolicy() {
super(RelationalDatabaseElementTypes.Column_3001);
}
/**
* @generated
*/
protected Command getDestroyElementCommand(DestroyElementRequest req) {
View view = (View) getHost().getModel();
CompositeTransactionalCommand cmd = new CompositeTransactionalCommand(
getEditingDomain(), null);
cmd.setTransactionNestingEnabled(false);
for (Iterator<?> it = view.getTargetEdges().iterator(); it.hasNext();) {
Edge incomingLink = (Edge) it.next();
if (RelationalDatabaseVisualIDRegistry.getVisualID(incomingLink) == ForeignKeyTableColumnEditPart.VISUAL_ID) {
DestroyReferenceRequest r = new DestroyReferenceRequest(
incomingLink.getSource().getElement(), null,
incomingLink.getTarget().getElement(), false);
cmd.add(new DestroyReferenceCommand(r));
cmd.add(new DeleteCommand(getEditingDomain(), incomingLink));
continue;
}
if (RelationalDatabaseVisualIDRegistry.getVisualID(incomingLink) == ForeignKeyForeignColumnEditPart.VISUAL_ID) {
DestroyReferenceRequest r = new DestroyReferenceRequest(
incomingLink.getSource().getElement(), null,
incomingLink.getTarget().getElement(), false);
cmd.add(new DestroyReferenceCommand(r));
cmd.add(new DeleteCommand(getEditingDomain(), incomingLink));
continue;
}
}
EAnnotation annotation = view.getEAnnotation("Shortcut"); //$NON-NLS-1$
if (annotation == null) {
// there are indirectly referenced children, need extra commands: false
addDestroyShortcutsCommand(cmd, view);
// delete host element
cmd.add(new DestroyElementCommand(req));
} else {
cmd.add(new DeleteCommand(getEditingDomain(), view));
}
return getGEFWrapper(cmd.reduce());
}
/**
* @generated
*/
protected Command getCreateRelationshipCommand(CreateRelationshipRequest req) {
Command command = req.getTarget() == null ? getStartCreateRelationshipCommand(req)
: getCompleteCreateRelationshipCommand(req);
return command != null ? command : super
.getCreateRelationshipCommand(req);
}
/**
* @generated
*/
protected Command getStartCreateRelationshipCommand(
CreateRelationshipRequest req) {
if (RelationalDatabaseElementTypes.ForeignKeyTableColumn_4001 == req
.getElementType()) {
return null;
}
if (RelationalDatabaseElementTypes.ForeignKeyForeignColumn_4002 == req
.getElementType()) {
return null;
}
return null;
}
/**
* @generated
*/
protected Command getCompleteCreateRelationshipCommand(
CreateRelationshipRequest req) {
if (RelationalDatabaseElementTypes.ForeignKeyTableColumn_4001 == req
.getElementType()) {
return getGEFWrapper(new ForeignKeyTableColumnCreateCommand(req,
req.getSource(), req.getTarget()));
}
if (RelationalDatabaseElementTypes.ForeignKeyForeignColumn_4002 == req
.getElementType()) {
return getGEFWrapper(new ForeignKeyForeignColumnCreateCommand(req,
req.getSource(), req.getTarget()));
}
return null;
}
/**
* Returns command to reorient EReference based link. New link target or source
* should be the domain model element associated with this node.
*
* @generated
*/
protected Command getReorientReferenceRelationshipCommand(
ReorientReferenceRelationshipRequest req) {
switch (getVisualID(req)) {
case ForeignKeyTableColumnEditPart.VISUAL_ID:
return getGEFWrapper(new ForeignKeyTableColumnReorientCommand(req));
case ForeignKeyForeignColumnEditPart.VISUAL_ID:
return getGEFWrapper(new ForeignKeyForeignColumnReorientCommand(req));
}
return super.getReorientReferenceRelationshipCommand(req);
}
}