Activator.java

package com.aptana.ide.editor.json;

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;
import com.aptana.ide.core.ui.CoreUIUtils;

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

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

	// The shared instance
	private static Activator plugin;
	
	private static Hashtable<String, Image> images = new Hashtable<String, Image>();
	
	/**
	 * 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;
		
		CoreUIUtils.registerFileExtension("com.aptana.ide.editor.text", "*", "json"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
	}

	/*
	 * (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;
	}

	
	/**
	 * getImage
	 * 
	 * @param path
	 * @return Image
	 */
	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;
		}
		else
		{
			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); //$NON-NLS-1$
	}

}