DStateSwitchCreateCommand.java

package org.eclipse.uml2.diagram.timing.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.EClass;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.gmf.runtime.common.core.command.CommandResult;
import org.eclipse.gmf.runtime.emf.type.core.commands.CreateElementCommand;
import org.eclipse.gmf.runtime.emf.type.core.requests.ConfigureRequest;
import org.eclipse.gmf.runtime.emf.type.core.requests.CreateRelationshipRequest;
import org.eclipse.uml2.diagram.timing.edit.policies.TimingDBaseItemSemanticEditPolicy;
import org.eclipse.uml2.diagram.timing.model.timingd.DBlock;
import org.eclipse.uml2.diagram.timing.model.timingd.DSegment;
import org.eclipse.uml2.diagram.timing.model.timingd.DSegmentEnd;
import org.eclipse.uml2.diagram.timing.model.timingd.DSegmentStart;
import org.eclipse.uml2.diagram.timing.model.timingd.DStateSwitch;
import org.eclipse.uml2.diagram.timing.model.timingd.DValueLine;
import org.eclipse.uml2.diagram.timing.model.timingd.TimingDFactory;
import org.eclipse.uml2.diagram.timing.model.timingd.TimingDPackage;

/**
 * @generated
 */

public class DStateSwitchCreateCommand extends CreateElementCommand {

	/**
	 * @generated
	 */
	private final EObject source;

	/**
	 * @generated
	 */
	private final EObject target;

	/**
	 * @generated
	 */
	private final DBlock container;

	/**
	 * @generated
	 */
	public DStateSwitchCreateCommand(CreateRelationshipRequest request, EObject source, EObject target) {
		super(request);
		this.source = source;
		this.target = target;
		if (request.getContainmentFeature() == null) {
			setContainmentFeature(TimingDPackage.eINSTANCE.getDBlock_Switches());
		}

		container = deduceContainer(source, target);
		if (container != null) {
			super.setElementToEdit(container);
		}
	}

	/**
	 * @generated
	 */
	public boolean canExecute() {
		if (source == null && target == null) {
			return false;
		}
		if (source != null && false == source instanceof DSegmentEnd) {
			return false;
		}
		if (target != null && false == target instanceof DSegmentStart) {
			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 TimingDBaseItemSemanticEditPolicy.LinkConstraints.canCreateDStateSwitch_4001(getContainer(), getSource(), getTarget());
	}

	/**
	 * @generated
	 */
	protected EObject doDefaultElementCreation() {
		DStateSwitch newElement = TimingDFactory.eINSTANCE.createDStateSwitch();
		getContainer().getSwitches().add(newElement);
		newElement.setFromSegmentEnd(getSource());
		newElement.setToSegmentStart(getTarget());
		return newElement;
	}

	/**
	 * @generated
	 */
	protected EClass getEClassToEdit() {
		return TimingDPackage.eINSTANCE.getDBlock();
	}

	/**
	 * @generated
	 */
	protected CommandResult doExecuteWithResult(IProgressMonitor monitor, IAdaptable info) throws ExecutionException {
		if (!canExecute()) {
			throw new ExecutionException("Invalid arguments in create link command"); //$NON-NLS-1$
		}
		return super.doExecuteWithResult(monitor, info);
	}

	/**
	 * @generated
	 */
	protected ConfigureRequest createConfigureRequest() {
		ConfigureRequest request = super.createConfigureRequest();
		request.setParameter(CreateRelationshipRequest.SOURCE, getSource());
		request.setParameter(CreateRelationshipRequest.TARGET, getTarget());
		return request;
	}

	/**
	 * @generated
	 */
	protected void setElementToEdit(EObject element) {
		throw new UnsupportedOperationException();
	}

	/**
	 * @generated
	 */
	protected DSegmentEnd getSource() {
		return (DSegmentEnd) source;
	}

	/**
	 * @generated
	 */
	protected DSegmentStart getTarget() {
		return (DSegmentStart) target;
	}

	/**
	 * @generated
	 */
	public DBlock getContainer() {
		return container;
	}

	/**
	 * Default approach is to traverse ancestors of the source to find instance of container.
	 * Modify with appropriate logic.
	 * @generated
	 */
	private static DBlock 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 DBlock) {
				return (DBlock) element;
			}
		}
		return null;
	}

}