PortalPlugin.java

package com.aptana.ide.server.portal;

import java.util.Hashtable;

import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.swt.graphics.Image;
import org.eclipse.ui.plugin.AbstractUIPlugin;
import org.osgi.framework.BundleContext;

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

    // The plug-in ID
    public static final String PLUGIN_ID = "com.aptana.ide.server.portal"; //$NON-NLS-1$

    // The shared instance
    private static PortalPlugin plugin;

    private static Hashtable<String, Image> images = new Hashtable<String, Image>();

    /**
     * The constructor
     */
    public PortalPlugin() {
    }

    /*
     * (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 PortalPlugin getDefault() {
        return plugin;
    }

    /**
     * Returns the image on the specified path.
     * 
     * @param path
     *            the path to the image
     * @return Image the image object
     */
    public static Image getImage(String path) {
        if (images.get(path) == null) {
            ImageDescriptor id = getImageDescriptor(path);
            if (id == null) {
                return null;
            }

            Image i = id.createImage();
            images.put(path, i);
            return i;
        }
        return images.get(path);
    }

    /**
     * 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 AbstractUIPlugin.imageDescriptorFromPlugin(PLUGIN_ID, path);
    }

}