Activator.java

/*****************************************************************************
 *  Limpet - the Lightweight InforMation ProcEssing Toolkit
 *  http://limpet.info
 *
 *  (C) 2015-2016, Deep Blue C Technologies Ltd
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the Eclipse Public License v1.0
 *  (http://www.eclipse.org/legal/epl-v10.html)
 *
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 *****************************************************************************/
package info.limpet.rcp;

import info.limpet.data.operations.spatial.GeoSupport;
import info.limpet.data.operations.spatial.GeotoolsCalculator;

import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.resource.ImageRegistry;
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 Activator extends AbstractUIPlugin
{

	// The plug-in ID
	public static final String PLUGIN_ID = "info.limpet.rcp"; //$NON-NLS-1$

	// The shared instance
	private static Activator plugin;

	private ImageRegistry _imageRegistry;

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

	private static ImageRegistry getRegistry()
	{
		return plugin._imageRegistry;
	}

	public static Image getImageFromRegistry(final ImageDescriptor name)
	{
		Image res = null;

		// do we already have an image
		if (getRegistry() == null)
		{
			plugin._imageRegistry = new ImageRegistry();
		}

		// ok - do we have it already?
		res = getRegistry().get(name.toString());

		if (res == null)
		{
			getRegistry().put(name.toString(), name);
			res = getRegistry().get(name.toString());
		}

		// and return it..
		return res;
	}

	/*
	 * (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;
		
		// ok, setup the geo tools service
		GeoSupport.setCalculator(new GeotoolsCalculator());
	}

	/*
	 * (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);
	}

	public static void logError(int statCode, String message, Exception e)
	{
		IStatus status = new Status(statCode, PLUGIN_ID, message, e);
		getDefault().getLog().log(status);
	}

	public static void log(Exception e)
	{
		IStatus status = new Status(IStatus.WARNING, PLUGIN_ID, e.getMessage(), e);
		getDefault().getLog().log(status);
	}
}