/** | |
* <copyright> | |
* | |
* Copyright (c) 2013 itemis and others. | |
* All rights reserved. This program and the accompanying materials | |
* are made available under the terms of the Eclipse Public License v2.0 | |
* which accompanies this distribution, and is available at | |
* https://www.eclipse.org/org/documents/epl-2.0/EPL-2.0.html | |
* | |
* Contributors: | |
* itemis - Initial API and implementation | |
* | |
* </copyright> | |
*/ | |
package org.eclipse.sphinx.examples.hummingbird20.diagram.gmf.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.common.core.command.ICommand; | |
import org.eclipse.gmf.runtime.emf.type.core.IElementType; | |
import org.eclipse.gmf.runtime.emf.type.core.commands.EditElementCommand; | |
import org.eclipse.gmf.runtime.emf.type.core.requests.ConfigureRequest; | |
import org.eclipse.gmf.runtime.emf.type.core.requests.CreateElementRequest; | |
import org.eclipse.gmf.runtime.emf.type.core.requests.CreateRelationshipRequest; | |
import org.eclipse.sphinx.examples.hummingbird20.diagram.gmf.edit.policies.Hummingbird20BaseItemSemanticEditPolicy; | |
import org.eclipse.sphinx.examples.hummingbird20.instancemodel.Component; | |
import org.eclipse.sphinx.examples.hummingbird20.instancemodel.Connection; | |
import org.eclipse.sphinx.examples.hummingbird20.instancemodel.InstanceModel20Factory; | |
/** | |
* @generated | |
*/ | |
public class ConnectionCreateCommand extends EditElementCommand { | |
/** | |
* @generated | |
*/ | |
private final EObject source; | |
/** | |
* @generated | |
*/ | |
private final EObject target; | |
/** | |
* @generated | |
*/ | |
private final Component container; | |
/** | |
* @generated | |
*/ | |
public ConnectionCreateCommand(CreateRelationshipRequest request, EObject source, EObject target) { | |
super(request.getLabel(), null, request); | |
this.source = source; | |
this.target = target; | |
container = deduceContainer(source, target); | |
} | |
/** | |
* @generated | |
*/ | |
@Override | |
public boolean canExecute() { | |
if (source == null && target == null) { | |
return false; | |
} | |
if (source != null && false == source instanceof Component) { | |
return false; | |
} | |
if (target != null && false == target instanceof Component) { | |
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 | |
if (getContainer() == null) { | |
return false; | |
} | |
return Hummingbird20BaseItemSemanticEditPolicy.getLinkConstraints().canCreateConnection_4001(getContainer(), getSource(), getTarget()); | |
} | |
/** | |
* @generated | |
*/ | |
@Override | |
protected CommandResult doExecuteWithResult(IProgressMonitor monitor, IAdaptable info) throws ExecutionException { | |
if (!canExecute()) { | |
throw new ExecutionException("Invalid arguments in create link command"); //$NON-NLS-1$ | |
} | |
Connection newElement = InstanceModel20Factory.eINSTANCE.createConnection(); | |
getContainer().getOutgoingConnections().add(newElement); | |
newElement.setSourceComponent(getSource()); | |
newElement.setTargetComponent(getTarget()); | |
doConfigure(newElement, monitor, info); | |
((CreateElementRequest) getRequest()).setNewElement(newElement); | |
return CommandResult.newOKCommandResult(newElement); | |
} | |
/** | |
* @generated | |
*/ | |
protected void doConfigure(Connection newElement, IProgressMonitor monitor, IAdaptable info) throws ExecutionException { | |
IElementType elementType = ((CreateElementRequest) getRequest()).getElementType(); | |
ConfigureRequest configureRequest = new ConfigureRequest(getEditingDomain(), newElement, elementType); | |
configureRequest.setClientContext(((CreateElementRequest) getRequest()).getClientContext()); | |
configureRequest.addParameters(getRequest().getParameters()); | |
configureRequest.setParameter(CreateRelationshipRequest.SOURCE, getSource()); | |
configureRequest.setParameter(CreateRelationshipRequest.TARGET, getTarget()); | |
ICommand configureCommand = elementType.getEditCommand(configureRequest); | |
if (configureCommand != null && configureCommand.canExecute()) { | |
configureCommand.execute(monitor, info); | |
} | |
} | |
/** | |
* @generated | |
*/ | |
@Override | |
protected void setElementToEdit(EObject element) { | |
throw new UnsupportedOperationException(); | |
} | |
/** | |
* @generated | |
*/ | |
protected Component getSource() { | |
return (Component) source; | |
} | |
/** | |
* @generated | |
*/ | |
protected Component getTarget() { | |
return (Component) target; | |
} | |
/** | |
* @generated | |
*/ | |
public Component getContainer() { | |
return container; | |
} | |
/** | |
* Default approach is to traverse ancestors of the source to find instance of container. Modify with appropriate | |
* logic. | |
* | |
* @generated | |
*/ | |
private static Component deduceContainer(EObject source, EObject target) { | |
// Find container element for the new link. | |
// Climb up by containment hierarchy starting from the source | |
// and return the first element that is instance of the container class. | |
for (EObject element = source; element != null; element = element.eContainer()) { | |
if (element instanceof Component) { | |
return (Component) element; | |
} | |
} | |
return null; | |
} | |
} |