GeneralizationGeneralReorientCommand.java

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

import java.util.ArrayList;
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.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 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;

/**
 * @generated
 */
public class GeneralizationGeneralReorientCommand extends EditElementCommand {

	/**
	 * @generated
	 */
	private final int reorientDirection;

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

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

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

	/**
	 * @generated
	 */
	public GeneralizationGeneralReorientCommand(ReorientReferenceRelationshipRequest request) {
		super(request.getLabel(), null, request);
		reorientDirection = request.getDirection();
		referenceOwner = request.getReferenceOwner();
		oldEnd = request.getOldRelationshipEnd();
		newEnd = request.getNewRelationshipEnd();
	}

	/**
	 * @generated NOT
	 */
	public boolean canExecute() {
		if (false == referenceOwner instanceof GeneralizationSet && ((GeneralizationSet) referenceOwner).getGeneralization(getOldTarget()) != null) {
			return false;
		}
		if (reorientDirection == ReorientRelationshipRequest.REORIENT_SOURCE) {
			return canReorientSource();
		}
		if (reorientDirection == ReorientRelationshipRequest.REORIENT_TARGET) {
			return canReorientTarget();
		}
		return false;
	}

	/**
	 * @generated NOT
	 */
	protected boolean canReorientSource() {
		return false;
		//		if (!(oldEnd instanceof Classifier && newEnd instanceof Generalization)) {
		//			return false;
		//		}
		//		return UMLBaseItemSemanticEditPolicy.LinkConstraints.canExistGeneralizationGeneral_4012(getNewSource(), getOldTarget());
	}

	/**
	 * @generated
	 */
	protected boolean canReorientTarget() {
		if (!(oldEnd instanceof Classifier && newEnd instanceof Classifier)) {
			return false;
		}
		return UMLBaseItemSemanticEditPolicy.getLinkConstraints().canExistGeneralizationGeneral_4012(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().setGeneral(null);
		getNewSource().setGeneral(getOldTarget());
		return CommandResult.newOKCommandResult(referenceOwner);
	}

	/**
	 * @generated NOT
	 */
	protected CommandResult reorientTarget() throws ExecutionException {
		for (Generalization g : getAllGeneralizations()) {
			g.setGeneral(getNewTarget());
		}
		return CommandResult.newOKCommandResult(referenceOwner);
	}

	/**
	 * @generated NOT
	 */
	protected Generalization getOldSource() {
		return ((GeneralizationSet) referenceOwner).getGeneralization(getOldTarget());
	}

	/**
	 * @NOT generated
	 * Returns list of Generalizations of GeneralizationSet, that had been connected to classifier.  
	 * General property of all of them will be changed after reroute 
	 */
	protected List<Generalization> getAllGeneralizations() {
		List<Generalization> result = new ArrayList<Generalization>();
		for (Generalization g : ((GeneralizationSet) referenceOwner).getGeneralizations()) {
			if (getOldTarget().equals(g.getGeneral())) {
				result.add(g);
			}
		}
		return result;
	}

	/**
	 * @generated
	 */
	protected Generalization getNewSource() {
		return (Generalization) newEnd;
	}

	/**
	 * @generated
	 */
	protected Classifier getOldTarget() {
		return (Classifier) oldEnd;
	}

	/**
	 * @generated
	 */
	protected Classifier getNewTarget() {
		return (Classifier) newEnd;
	}
}