/*
* 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.CreateRelationshipRequest;
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 ForeignKeyForeignColumnCreateCommand extends EditElementCommand {
/**
* @generated
*/
private final EObject source;
/**
* @generated
*/
private final EObject target;
/**
* @generated
*/
public ForeignKeyForeignColumnCreateCommand(
CreateRelationshipRequest request, EObject source, EObject target) {
super(request.getLabel(), null, request);
this.source = source;
this.target = target;
}
/**
* @generated
*/
public boolean canExecute() {
if (source == null && target == null) {
return false;
}
if (source != null && false == source instanceof ForeignKey) {
return false;
}
if (target != null && false == target instanceof Column) {
return false;
}
if (getSource() == null) {
return true; // link creation is in progress; source is not defined yet
}
// target may be null here but it's possible to check constraint
return RelationalDatabaseBaseItemSemanticEditPolicy
.getLinkConstraints().canCreateForeignKeyForeignColumn_4002(
getSource(), getTarget());
}
/**
* @generated
*/
protected CommandResult doExecuteWithResult(IProgressMonitor monitor,
IAdaptable info) throws ExecutionException {
if (!canExecute()) {
throw new ExecutionException(
"Invalid arguments in create link command"); //$NON-NLS-1$
}
if (getSource() != null && getTarget() != null) {
getSource().setForeignColumn(getTarget());
}
return CommandResult.newOKCommandResult();
}
/**
* @generated
*/
protected void setElementToEdit(EObject element) {
throw new UnsupportedOperationException();
}
/**
* @generated
*/
protected ForeignKey getSource() {
return (ForeignKey) source;
}
/**
* @generated
*/
protected Column getTarget() {
return (Column) target;
}
}