examples/org.eclipse.graphiti.examples.tutorial/src/org/eclipse/graphiti/examples/tutorial/features/TutorialDrillDownEClassFeature.java

/*********************************************************************
* Copyright (c) 2005, 2019 SAP SE
*
* This program and the accompanying materials are made
* available under the terms of the Eclipse Public License 2.0
* which is available at https://www.eclipse.org/legal/epl-2.0/
*
* Contributors:
*    SAP SE - initial API, implementation and documentation
*
* SPDX-License-Identifier: EPL-2.0
**********************************************************************/
package org.eclipse.graphiti.examples.tutorial.features;

import java.util.Collection;
import java.util.Collections;

import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.ecore.resource.Resource;
import org.eclipse.graphiti.examples.tutorial.TutorialUtil;
import org.eclipse.graphiti.features.IFeatureProvider;
import org.eclipse.graphiti.features.context.ICustomContext;
import org.eclipse.graphiti.mm.pictograms.Diagram;
import org.eclipse.graphiti.mm.pictograms.PictogramElement;
import org.eclipse.graphiti.ui.features.AbstractDrillDownFeature;


public class TutorialDrillDownEClassFeature extends AbstractDrillDownFeature {

	public TutorialDrillDownEClassFeature(IFeatureProvider fp) {
		super(fp);
	}

	@Override
	public String getName() {
		return "Open associated diagram"; //$NON-NLS-1$
	}

	@Override
	public String getDescription() {
		return "Open the diagram associated with this EClass"; //$NON-NLS-1$
	}

	@Override
	public boolean canExecute(ICustomContext context) {
		PictogramElement[] pes = context.getPictogramElements();
		// first check, if one EClass is selected
		if (pes != null && pes.length == 1) {
			Object bo = getBusinessObjectForPictogramElement(pes[0]);
			if (bo instanceof EClass) {
				// then forward to super-implementation, which checks if
				// this EClass is associated with other diagrams
				return super.canExecute(context);
			}
		}
		return false;
	}

	@Override
	protected Collection<Diagram> getDiagrams() {
		Collection<Diagram> result = Collections.emptyList();
		Resource resource = getDiagram().eResource();
		URI uri = resource.getURI();
		URI uriTrimmed = uri.trimFragment();
		if (uriTrimmed.isPlatformResource()){
			String platformString = uriTrimmed.toPlatformString(true);
			IResource fileResource = ResourcesPlugin.getWorkspace().getRoot().findMember(platformString);
			if (fileResource != null){
				IProject project = fileResource.getProject();
				result = TutorialUtil.getDiagrams(project);
			}
			
		}
		return result;
	}
}