/*
* 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.commands;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.gmf.runtime.common.core.command.CommandResult;
import org.eclipse.gmf.runtime.emf.type.core.commands.EditElementCommand;
import org.eclipse.gmf.runtime.emf.type.core.requests.ReorientReferenceRelationshipRequest;
import org.eclipse.gmf.runtime.emf.type.core.requests.ReorientRelationshipRequest;
import edu.toronto.cs.se.modelepedia.relationaldatabase.Column;
import edu.toronto.cs.se.modelepedia.relationaldatabase.ForeignKey;
import edu.toronto.cs.se.modelepedia.relationaldatabase.diagram.edit.policies.RelationalDatabaseBaseItemSemanticEditPolicy;
/**
* @generated
*/
public class ForeignKeyTableColumnReorientCommand extends EditElementCommand {
/**
* @generated
*/
private final int reorientDirection;
/**
* @generated
*/
private final EObject referenceOwner;
/**
* @generated
*/
private final EObject oldEnd;
/**
* @generated
*/
private final EObject newEnd;
/**
* @generated
*/
public ForeignKeyTableColumnReorientCommand(
ReorientReferenceRelationshipRequest request) {
super(request.getLabel(), null, request);
reorientDirection = request.getDirection();
referenceOwner = request.getReferenceOwner();
oldEnd = request.getOldRelationshipEnd();
newEnd = request.getNewRelationshipEnd();
}
/**
* @generated
*/
public boolean canExecute() {
if (false == referenceOwner instanceof ForeignKey) {
return false;
}
if (reorientDirection == ReorientRelationshipRequest.REORIENT_SOURCE) {
return canReorientSource();
}
if (reorientDirection == ReorientRelationshipRequest.REORIENT_TARGET) {
return canReorientTarget();
}
return false;
}
/**
* @generated
*/
protected boolean canReorientSource() {
if (!(oldEnd instanceof Column && newEnd instanceof ForeignKey)) {
return false;
}
return RelationalDatabaseBaseItemSemanticEditPolicy
.getLinkConstraints().canExistForeignKeyTableColumn_4001(
getNewSource(), getOldTarget());
}
/**
* @generated
*/
protected boolean canReorientTarget() {
if (!(oldEnd instanceof Column && newEnd instanceof Column)) {
return false;
}
return RelationalDatabaseBaseItemSemanticEditPolicy
.getLinkConstraints().canExistForeignKeyTableColumn_4001(
getOldSource(), getNewTarget());
}
/**
* @generated
*/
protected CommandResult doExecuteWithResult(IProgressMonitor monitor,
IAdaptable info) throws ExecutionException {
if (!canExecute()) {
throw new ExecutionException(
"Invalid arguments in reorient link command"); //$NON-NLS-1$
}
if (reorientDirection == ReorientRelationshipRequest.REORIENT_SOURCE) {
return reorientSource();
}
if (reorientDirection == ReorientRelationshipRequest.REORIENT_TARGET) {
return reorientTarget();
}
throw new IllegalStateException();
}
/**
* @generated
*/
protected CommandResult reorientSource() throws ExecutionException {
getOldSource().setTableColumn(null);
getNewSource().setTableColumn(getOldTarget());
return CommandResult.newOKCommandResult(referenceOwner);
}
/**
* @generated
*/
protected CommandResult reorientTarget() throws ExecutionException {
getOldSource().setTableColumn(getNewTarget());
return CommandResult.newOKCommandResult(referenceOwner);
}
/**
* @generated
*/
protected ForeignKey getOldSource() {
return (ForeignKey) referenceOwner;
}
/**
* @generated
*/
protected ForeignKey getNewSource() {
return (ForeignKey) newEnd;
}
/**
* @generated
*/
protected Column getOldTarget() {
return (Column) oldEnd;
}
/**
* @generated
*/
protected Column getNewTarget() {
return (Column) newEnd;
}
}