package OntoUML.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.ReorientRelationshipRequest;

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

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

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

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

	/**
	 * @generated
	 */
	public MaterialAssociationReorientCommand(
			ReorientRelationshipRequest request) {
		super(request.getLabel(), request.getRelationship(), request);
		reorientDirection = request.getDirection();
		oldEnd = request.getOldRelationshipEnd();
		newEnd = request.getNewRelationshipEnd();
	}

	/**
	 * @generated
	 */
	public boolean canExecute() {
		if (false == getElementToEdit() instanceof OntoUML.MaterialAssociation) {
			return false;
		}
		if (reorientDirection == ReorientRelationshipRequest.REORIENT_SOURCE) {
			return canReorientSource();
		}
		if (reorientDirection == ReorientRelationshipRequest.REORIENT_TARGET) {
			return canReorientTarget();
		}
		return false;
	}

	/**
	 * @generated
	 */
	protected boolean canReorientSource() {
		if (!(oldEnd instanceof OntoUML.Type && newEnd instanceof OntoUML.Type)) {
			return false;
		}
		if (getLink().getAssociationEndAux2().size() != 1) {
			return false;
		}
		OntoUML.Type target = (OntoUML.Type) getLink().getAssociationEndAux2()
				.get(0);
		if (!(getLink().eContainer() instanceof OntoUML.Container)) {
			return false;
		}
		OntoUML.Container container = (OntoUML.Container) getLink()
				.eContainer();
		return OntoUML.diagram.edit.policies.OntoUMLBaseItemSemanticEditPolicy.LinkConstraints
				.canExistMaterialAssociation_4007(container, getNewSource(),
						target);
	}

	/**
	 * @generated
	 */
	protected boolean canReorientTarget() {
		if (!(oldEnd instanceof OntoUML.Type && newEnd instanceof OntoUML.Type)) {
			return false;
		}
		if (getLink().getAssociationEndAux1().size() != 1) {
			return false;
		}
		OntoUML.Type source = (OntoUML.Type) getLink().getAssociationEndAux1()
				.get(0);
		if (!(getLink().eContainer() instanceof OntoUML.Container)) {
			return false;
		}
		OntoUML.Container container = (OntoUML.Container) getLink()
				.eContainer();
		return OntoUML.diagram.edit.policies.OntoUMLBaseItemSemanticEditPolicy.LinkConstraints
				.canExistMaterialAssociation_4007(container, source,
						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 {
		getLink().getAssociationEndAux1().remove(getOldSource());
		getLink().getAssociationEndAux1().add(getNewSource());
		return CommandResult.newOKCommandResult(getLink());
	}

	/**
	 * @generated
	 */
	protected CommandResult reorientTarget() throws ExecutionException {
		getLink().getAssociationEndAux2().remove(getOldTarget());
		getLink().getAssociationEndAux2().add(getNewTarget());
		return CommandResult.newOKCommandResult(getLink());
	}

	/**
	 * @generated
	 */
	protected OntoUML.MaterialAssociation getLink() {
		return (OntoUML.MaterialAssociation) getElementToEdit();
	}

	/**
	 * @generated
	 */
	protected OntoUML.Type getOldSource() {
		return (OntoUML.Type) oldEnd;
	}

	/**
	 * @generated
	 */
	protected OntoUML.Type getNewSource() {
		return (OntoUML.Type) newEnd;
	}

	/**
	 * @generated
	 */
	protected OntoUML.Type getOldTarget() {
		return (OntoUML.Type) oldEnd;
	}

	/**
	 * @generated
	 */
	protected OntoUML.Type getNewTarget() {
		return (OntoUML.Type) newEnd;
	}
}