padre-master/visual_builder_pa_formulae-master/src/plugin/Activator.java
package plugin;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.ui.plugin.AbstractUIPlugin;
import org.osgi.framework.BundleContext;

/**
 * 
 * The activator class controls the plug-in life cycle
 * 
 */
public class Activator extends AbstractUIPlugin {

	// The plug-in ID
	public static final String PLUGIN_ID = "prova.plugin"; //$NON-NLS-1$

	// 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;

	}

	/*
	 * 
	 * (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);

	}

}
