plugins/org.eclipse.uml2.diagram.clazz/src/org/eclipse/uml2/diagram/clazz/edit/commands/Generalization2CreateCommand.java

package org.eclipse.uml2.diagram.clazz.edit.commands;

import java.util.List;

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.clazz.edit.policies.UMLBaseItemSemanticEditPolicy;
import org.eclipse.uml2.uml.Classifier;
import org.eclipse.uml2.uml.Generalization;
import org.eclipse.uml2.uml.GeneralizationSet;
import org.eclipse.uml2.uml.UMLFactory;
import org.eclipse.uml2.uml.UMLPackage;

/**
 * @generated
 */
public class Generalization2CreateCommand extends CreateElementCommand {

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

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

	/**
	 * @generated
	 */
	public Generalization2CreateCommand(CreateRelationshipRequest request, EObject source, EObject target) {
		super(request);
		this.source = source;
		this.target = target;
		if (request.getContainmentFeature() == null) {
			setContainmentFeature(UMLPackage.eINSTANCE.getClassifier_Generalization());
		}

		super.setElementToEdit(source);
	}

	/**
	 * @generated
	 */
	public boolean canExecute() {
		if (source == null && target == null) {
			return false;
		}
		if (source != null && false == source instanceof Classifier) {
			return false;
		}
		if (target != null && false == target instanceof GeneralizationSet) {
			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 UMLBaseItemSemanticEditPolicy.LinkConstraints.canCreateGeneralization_4011(getSource(), getTarget());
	}

	/**
	 * @generated
	 */
	protected EObject doDefaultElementCreationGen() {
		Generalization newElement = UMLFactory.eINSTANCE.createGeneralization();
		getSource().getGeneralizations().add(newElement);
		newElement.getGeneralizationSets().add(getTarget());
		return newElement;
	}

	/**
	 * @generated NOT
	 */
	protected EObject doDefaultElementCreation() {
		Generalization newElement = (Generalization) doDefaultElementCreationGen();
		newElement.setGeneral(getGeneralClassifier());
		return newElement;
	}

	/**
	 * @NOT-generated
	 */
	private Classifier getGeneralClassifier() {
		List<Generalization> generalisations = getTarget().getGeneralizations();
		return generalisations.isEmpty() ? null : generalisations.get(0).getGeneral();

	}

	/**
	 * @generated
	 */
	protected EClass getEClassToEdit() {
		return UMLPackage.eINSTANCE.getClassifier();
	}

	/**
	 * @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 Classifier getSource() {
		return (Classifier) source;
	}

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