Application.java

/**
 * Copyright 2010 The University of North Carolina at Chapel Hill
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package unc.lib.cdr.workbench.rcp;

import org.eclipse.core.runtime.Platform;
import org.eclipse.equinox.app.IApplication;
import org.eclipse.equinox.app.IApplicationContext;
import org.eclipse.osgi.service.datalocation.Location;
import org.eclipse.swt.widgets.Display;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.PlatformUI;

/**
 * This class controls all aspects of the application's execution
 */
public class Application implements IApplication {
	/*
	 * (non-Javadoc)
	 * 
	 * @seeorg.eclipse.equinox.app.IApplication#start(org.eclipse.equinox.app. IApplicationContext)
	 */
	public Object start(IApplicationContext context) throws Exception {
		System.out.println("Application.start()");
		Display display = null;
		try {
			Location instanceLoc = Platform.getInstanceLocation();
			// String userHome = System.getProperty("user.home");
			// String sep = System.getProperty("file.separator");
			// instanceLoc.set(new URL("file", null, userHome + sep + "cdr_workbench_workspace"), false);
			// get what the user last said about remembering the workspace
			// location
			/*
			 * boolean remember = PickWorkspaceDialog.isRememberWorkspace();
			 * 
			 * // get the last used workspace location URL lastUsedWs = PickWorkspaceDialog.getLastSetWorkspaceLocation();
			 * 
			 * // if we have a "remember" but no last used workspace, it's not much // to // remember if (remember &&
			 * (lastUsedWs == null)) { remember = false; }
			 * 
			 * // check to ensure the workspace location is still OK if (remember) { // if there's any problem whatsoever
			 * with the workspace, force a // dialog which in its turn will tell them what's bad String ret =
			 * PickWorkspaceDialog.checkWorkspaceLocation (Display.getDefault().getActiveShell(), lastUsedWs, false,
			 * false); if (ret != null) { remember = false; }
			 * 
			 * }
			 * 
			 * // if we don't remember the workspace, show the dialog if (!remember) { PickWorkspaceDialog pwd = new
			 * PickWorkspaceDialog(false, null); int pick = pwd.open();
			 * 
			 * // if the user cancelled, we can't do anything as we need a // workspace, so in this case, we tell them and
			 * exit if (pick == Window.CANCEL) { MessageDialog.openError(display.getActiveShell(), "Error",
			 * "The application can not start without a workspace root and will now exit." ); try {
			 * PlatformUI.getWorkbench().close(); } catch (Exception err) {
			 * 
			 * } System.exit(0); return IApplication.EXIT_OK; } else { // tell Eclipse what the selected location was and
			 * continue instanceLoc.set(pwd.getSelectedWorkspaceLocation(), true); } } else { instanceLoc.set(lastUsedWs,
			 * true); }
			 */

			display = PlatformUI.createDisplay();
			int returnCode = PlatformUI.createAndRunWorkbench(display, new ApplicationWorkbenchAdvisor());
			if (returnCode == PlatformUI.RETURN_RESTART)
				return IApplication.EXIT_RESTART;
			else
				return IApplication.EXIT_OK;
		} finally {
			if (display != null) {
				display.dispose();
			}
		}

	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.equinox.app.IApplication#stop()
	 */
	public void stop() {
		final IWorkbench workbench = PlatformUI.getWorkbench();
		if (workbench == null)
			return;
		final Display display = workbench.getDisplay();
		display.syncExec(new Runnable() {
			public void run() {
				if (!display.isDisposed())
					workbench.close();
			}
		});
	}

}