bundles/org.eclipse.vorto.common/src/org/eclipse/vorto/api/common/project/IProjectSelectionFactory.java

/*******************************************************************************
 * Copyright (c) 2014 Bosch Software Innovations GmbH and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * and Eclipse Distribution License v1.0 which accompany this distribution.
 *
 * The Eclipse Public License is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * The Eclipse Distribution License is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * Contributors:
 * Bosch Software Innovations GmbH - Please refer to git log
 *
 *******************************************************************************/
package org.eclipse.vorto.api.common.project;

import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jface.text.ITextSelection;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.ISelectionService;
import org.eclipse.ui.IViewPart;
import org.eclipse.ui.IViewReference;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PlatformUI;
import org.eclipse.vorto.api.common.ApplicationConstants;


public class IProjectSelectionFactory implements IEclipseProjectSelectionFactory {

	private static IProjectSelectionFactory instance = null;

	private IProjectSelectionFactory() {

	}

	public static IProjectSelectionFactory getInstance() {
		if (instance == null) {
			instance = new IProjectSelectionFactory();
		}
		return instance;
	}

	@SuppressWarnings("unchecked")
	@Override
	public <IProject> IProject getProjectFromSelection() {
		if (PlatformUI.getWorkbench().getActiveWorkbenchWindow() != null) {

			IWorkbench workbench = PlatformUI.getWorkbench();
			IWorkbenchWindow activeWorkbenchWindow = workbench
					.getActiveWorkbenchWindow();
			ISelectionService selectionService = activeWorkbenchWindow
					.getSelectionService();
			ISelection selection2 = selectionService.getSelection();
			IViewPart activePart = null;
			IStructuredSelection selection = null;

			if (selection2 instanceof ITextSelection) {
				IViewReference[] viewReferences = PlatformUI.getWorkbench()
						.getActiveWorkbenchWindow().getActivePage()
						.getViewReferences();
				for (IViewReference view : viewReferences) {
					if (ApplicationConstants.VORTO_TREE_VIEW_ID.equals(view
							.getId())) {
						activePart = view.getView(true);
						break;
					}
				}
				selection = (IStructuredSelection) activePart.getSite()
						.getSelectionProvider().getSelection();
			} else {
				selection = (IStructuredSelection) selection2;
			}

			if (selection.isEmpty()) {
				return null;
			}

			Object firstElement = selection.getFirstElement();
			if (firstElement instanceof IJavaProject) {
				return (IProject) ((IJavaProject) firstElement).getProject();
			} else if (firstElement instanceof IAdaptable) {
				IProject project = (IProject) ((IAdaptable) firstElement);
				return project;
			} else if (firstElement instanceof IoTModelProject) {
				IProject project = (IProject) ((IoTModelProject) firstElement)
						.getProject();
				return project;
			} else
				return (IProject) firstElement;
		}

		return null;
	}

}