org.eclipse.opencert.vocabulary.diagram/src/org/eclipse/opencert/vocabulary/diagram/edit/policies/TermItemSemanticEditPolicy.java

/*******************************************************************************
 * Copyright (c) 2016 KPIT Technologies.
 *
 * 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
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *   Jan Mauersberger- initial API and implementation
 *   Sascha Baumgart- initial API and implementation
 *******************************************************************************/
/*
 * 
 */
package org.eclipse.opencert.vocabulary.diagram.edit.policies;

import java.util.Iterator;

import org.eclipse.emf.ecore.EAnnotation;
import org.eclipse.gef.commands.Command;
import org.eclipse.gmf.runtime.diagram.core.commands.DeleteCommand;
import org.eclipse.gmf.runtime.emf.commands.core.command.CompositeTransactionalCommand;
import org.eclipse.gmf.runtime.emf.type.core.commands.DestroyElementCommand;
import org.eclipse.gmf.runtime.emf.type.core.commands.DestroyReferenceCommand;
import org.eclipse.gmf.runtime.emf.type.core.requests.CreateRelationshipRequest;
import org.eclipse.gmf.runtime.emf.type.core.requests.DestroyElementRequest;
import org.eclipse.gmf.runtime.emf.type.core.requests.DestroyReferenceRequest;
import org.eclipse.gmf.runtime.emf.type.core.requests.ReorientReferenceRelationshipRequest;
import org.eclipse.gmf.runtime.notation.Edge;
import org.eclipse.gmf.runtime.notation.View;
import org.eclipse.opencert.vocabulary.diagram.edit.commands.CategoryTermsCreateCommand;
import org.eclipse.opencert.vocabulary.diagram.edit.commands.CategoryTermsReorientCommand;
import org.eclipse.opencert.vocabulary.diagram.edit.commands.TermDefinedByCreateCommand;
import org.eclipse.opencert.vocabulary.diagram.edit.commands.TermDefinedByReorientCommand;
import org.eclipse.opencert.vocabulary.diagram.edit.commands.TermHasACreateCommand;
import org.eclipse.opencert.vocabulary.diagram.edit.commands.TermHasAReorientCommand;
import org.eclipse.opencert.vocabulary.diagram.edit.commands.TermIsACreateCommand;
import org.eclipse.opencert.vocabulary.diagram.edit.commands.TermIsAReorientCommand;
import org.eclipse.opencert.vocabulary.diagram.edit.commands.TermRefersToCreateCommand;
import org.eclipse.opencert.vocabulary.diagram.edit.commands.TermRefersToReorientCommand;
import org.eclipse.opencert.vocabulary.diagram.edit.parts.CategoryTermsEditPart;
import org.eclipse.opencert.vocabulary.diagram.edit.parts.TermDefinedByEditPart;
import org.eclipse.opencert.vocabulary.diagram.edit.parts.TermHasAEditPart;
import org.eclipse.opencert.vocabulary.diagram.edit.parts.TermIsAEditPart;
import org.eclipse.opencert.vocabulary.diagram.edit.parts.TermRefersToEditPart;
import org.eclipse.opencert.vocabulary.diagram.part.VocabularyVisualIDRegistry;
import org.eclipse.opencert.vocabulary.diagram.providers.VocabularyElementTypes;

/**
 * @generated
 */
public class TermItemSemanticEditPolicy extends
		VocabularyBaseItemSemanticEditPolicy {

	/**
	 * @generated
	 */
	public TermItemSemanticEditPolicy() {
		super(VocabularyElementTypes.Term_2001);
	}

	/**
	 * @generated
	 */
	protected Command getDestroyElementCommand(DestroyElementRequest req) {
		View view = (View) getHost().getModel();
		CompositeTransactionalCommand cmd = new CompositeTransactionalCommand(
				getEditingDomain(), null);
		cmd.setTransactionNestingEnabled(false);
		for (Iterator<?> it = view.getTargetEdges().iterator(); it.hasNext();) {
			Edge incomingLink = (Edge) it.next();
			if (VocabularyVisualIDRegistry.getVisualID(incomingLink) == CategoryTermsEditPart.VISUAL_ID) {
				DestroyReferenceRequest r = new DestroyReferenceRequest(
						incomingLink.getSource().getElement(), null,
						incomingLink.getTarget().getElement(), false);
				cmd.add(new DestroyReferenceCommand(r));
				cmd.add(new DeleteCommand(getEditingDomain(), incomingLink));
				continue;
			}
			if (VocabularyVisualIDRegistry.getVisualID(incomingLink) == TermIsAEditPart.VISUAL_ID) {
				DestroyReferenceRequest r = new DestroyReferenceRequest(
						incomingLink.getSource().getElement(), null,
						incomingLink.getTarget().getElement(), false);
				cmd.add(new DestroyReferenceCommand(r));
				cmd.add(new DeleteCommand(getEditingDomain(), incomingLink));
				continue;
			}
			if (VocabularyVisualIDRegistry.getVisualID(incomingLink) == TermHasAEditPart.VISUAL_ID) {
				DestroyReferenceRequest r = new DestroyReferenceRequest(
						incomingLink.getSource().getElement(), null,
						incomingLink.getTarget().getElement(), false);
				cmd.add(new DestroyReferenceCommand(r));
				cmd.add(new DeleteCommand(getEditingDomain(), incomingLink));
				continue;
			}
			if (VocabularyVisualIDRegistry.getVisualID(incomingLink) == TermRefersToEditPart.VISUAL_ID) {
				DestroyReferenceRequest r = new DestroyReferenceRequest(
						incomingLink.getSource().getElement(), null,
						incomingLink.getTarget().getElement(), false);
				cmd.add(new DestroyReferenceCommand(r));
				cmd.add(new DeleteCommand(getEditingDomain(), incomingLink));
				continue;
			}
		}
		for (Iterator<?> it = view.getSourceEdges().iterator(); it.hasNext();) {
			Edge outgoingLink = (Edge) it.next();
			if (VocabularyVisualIDRegistry.getVisualID(outgoingLink) == TermDefinedByEditPart.VISUAL_ID) {
				DestroyReferenceRequest r = new DestroyReferenceRequest(
						outgoingLink.getSource().getElement(), null,
						outgoingLink.getTarget().getElement(), false);
				cmd.add(new DestroyReferenceCommand(r));
				cmd.add(new DeleteCommand(getEditingDomain(), outgoingLink));
				continue;
			}
			if (VocabularyVisualIDRegistry.getVisualID(outgoingLink) == TermIsAEditPart.VISUAL_ID) {
				DestroyReferenceRequest r = new DestroyReferenceRequest(
						outgoingLink.getSource().getElement(), null,
						outgoingLink.getTarget().getElement(), false);
				cmd.add(new DestroyReferenceCommand(r));
				cmd.add(new DeleteCommand(getEditingDomain(), outgoingLink));
				continue;
			}
			if (VocabularyVisualIDRegistry.getVisualID(outgoingLink) == TermHasAEditPart.VISUAL_ID) {
				DestroyReferenceRequest r = new DestroyReferenceRequest(
						outgoingLink.getSource().getElement(), null,
						outgoingLink.getTarget().getElement(), false);
				cmd.add(new DestroyReferenceCommand(r));
				cmd.add(new DeleteCommand(getEditingDomain(), outgoingLink));
				continue;
			}
			if (VocabularyVisualIDRegistry.getVisualID(outgoingLink) == TermRefersToEditPart.VISUAL_ID) {
				DestroyReferenceRequest r = new DestroyReferenceRequest(
						outgoingLink.getSource().getElement(), null,
						outgoingLink.getTarget().getElement(), false);
				cmd.add(new DestroyReferenceCommand(r));
				cmd.add(new DeleteCommand(getEditingDomain(), outgoingLink));
				continue;
			}
		}
		EAnnotation annotation = view.getEAnnotation("Shortcut"); //$NON-NLS-1$
		if (annotation == null) {
			// there are indirectly referenced children, need extra commands: false
			addDestroyShortcutsCommand(cmd, view);
			// delete host element
			cmd.add(new DestroyElementCommand(req));
		} else {
			cmd.add(new DeleteCommand(getEditingDomain(), view));
		}
		return getGEFWrapper(cmd.reduce());
	}

	/**
	 * @generated
	 */
	protected Command getCreateRelationshipCommand(CreateRelationshipRequest req) {
		Command command = req.getTarget() == null ? getStartCreateRelationshipCommand(req)
				: getCompleteCreateRelationshipCommand(req);
		return command != null ? command : super
				.getCreateRelationshipCommand(req);
	}

	/**
	 * @generated
	 */
	protected Command getStartCreateRelationshipCommand(
			CreateRelationshipRequest req) {
		if (VocabularyElementTypes.CategoryTerms_4001 == req.getElementType()) {
			return null;
		}
		if (VocabularyElementTypes.TermDefinedBy_4003 == req.getElementType()) {
			return getGEFWrapper(new TermDefinedByCreateCommand(req,
					req.getSource(), req.getTarget()));
		}
		if (VocabularyElementTypes.TermIsA_4004 == req.getElementType()) {
			return getGEFWrapper(new TermIsACreateCommand(req, req.getSource(),
					req.getTarget()));
		}
		if (VocabularyElementTypes.TermHasA_4005 == req.getElementType()) {
			return getGEFWrapper(new TermHasACreateCommand(req,
					req.getSource(), req.getTarget()));
		}
		if (VocabularyElementTypes.TermRefersTo_4006 == req.getElementType()) {
			return getGEFWrapper(new TermRefersToCreateCommand(req,
					req.getSource(), req.getTarget()));
		}
		return null;
	}

	/**
	 * @generated
	 */
	protected Command getCompleteCreateRelationshipCommand(
			CreateRelationshipRequest req) {
		if (VocabularyElementTypes.CategoryTerms_4001 == req.getElementType()) {
			return getGEFWrapper(new CategoryTermsCreateCommand(req,
					req.getSource(), req.getTarget()));
		}
		if (VocabularyElementTypes.TermDefinedBy_4003 == req.getElementType()) {
			return null;
		}
		if (VocabularyElementTypes.TermIsA_4004 == req.getElementType()) {
			return getGEFWrapper(new TermIsACreateCommand(req, req.getSource(),
					req.getTarget()));
		}
		if (VocabularyElementTypes.TermHasA_4005 == req.getElementType()) {
			return getGEFWrapper(new TermHasACreateCommand(req,
					req.getSource(), req.getTarget()));
		}
		if (VocabularyElementTypes.TermRefersTo_4006 == req.getElementType()) {
			return getGEFWrapper(new TermRefersToCreateCommand(req,
					req.getSource(), req.getTarget()));
		}
		return null;
	}

	/**
	 * Returns command to reorient EReference based link. New link target or source
	 * should be the domain model element associated with this node.
	 * 
	 * @generated
	 */
	protected Command getReorientReferenceRelationshipCommand(
			ReorientReferenceRelationshipRequest req) {
		switch (getVisualID(req)) {
		case CategoryTermsEditPart.VISUAL_ID:
			return getGEFWrapper(new CategoryTermsReorientCommand(req));
		case TermDefinedByEditPart.VISUAL_ID:
			return getGEFWrapper(new TermDefinedByReorientCommand(req));
		case TermIsAEditPart.VISUAL_ID:
			return getGEFWrapper(new TermIsAReorientCommand(req));
		case TermHasAEditPart.VISUAL_ID:
			return getGEFWrapper(new TermHasAReorientCommand(req));
		case TermRefersToEditPart.VISUAL_ID:
			return getGEFWrapper(new TermRefersToReorientCommand(req));
		}
		return super.getReorientReferenceRelationshipCommand(req);
	}

}