Activator.java

package org.iatrix.messwerte;

import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.ui.plugin.AbstractUIPlugin;
import org.iatrix.messwerte.acl.ACLContributor;
import org.osgi.framework.BundleContext;

import ch.elexis.core.data.activator.CoreHub;

/**
 * The activator class controls the plug-in life cycle
 */
public class Activator extends AbstractUIPlugin {
	
	// The plug-in ID
	public static final String PLUGIN_ID = "org.iatrix.messwerte";
	
	// The shared instance
	private static Activator plugin;
	
	/**
	 * The constructor
	 */
	public Activator(){}
	
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.plugin.AbstractUIPlugin#start(org.osgi.framework.BundleContext)
	 */
	public void start(BundleContext context) throws Exception{
		super.start(context);
		plugin = this;
		
		initACL();
	}
	
	/**
	 * Initialize ACLs for the first time, if not yet done.
	 */
	private void initACL(){
		boolean isInitialized = CoreHub.globalCfg.get(Constants.ACL_INITIALIZED, false);
		if (!isInitialized) {
			new ACLContributor().initializeDefaults(CoreHub.acl);
			CoreHub.globalCfg.set(Constants.ACL_INITIALIZED, true);
			// make sure configuration is written, so that initalization is not repeated
			CoreHub.globalCfg.flush();
		}
		
	}
	
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.plugin.AbstractUIPlugin#stop(org.osgi.framework.BundleContext)
	 */
	public void stop(BundleContext context) throws Exception{
		plugin = null;
		super.stop(context);
	}
	
	/**
	 * Returns the shared instance
	 * 
	 * @return the shared instance
	 */
	public static Activator getDefault(){
		return plugin;
	}
	
	/**
	 * Returns an image descriptor for the image file at the given plug-in relative path
	 * 
	 * @param path
	 *            the path
	 * @return the image descriptor
	 */
	public static ImageDescriptor getImageDescriptor(String path){
		return imageDescriptorFromPlugin(PLUGIN_ID, path);
	}
}