org.eclipse.richbeans.widgets.Activator.java Source code

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Here is the source code for org.eclipse.richbeans.widgets.Activator.java

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/*-
 *******************************************************************************
 * Copyright (c) 2011, 2014 Diamond Light Source Ltd.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    Matthew Gerring - initial API and implementation and/or initial documentation
 *******************************************************************************/
package org.eclipse.richbeans.widgets;

import java.io.File;
import java.net.MalformedURLException;
import java.net.URL;

import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.ImageData;
import org.eclipse.swt.graphics.PaletteData;
import org.osgi.framework.Bundle;
import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import org.osgi.framework.ServiceReference;

public class Activator implements BundleActivator {

    private static BundleContext context;

    @Override
    public void start(BundleContext c) throws Exception {
        context = c;
    }

    @Override
    public void stop(BundleContext c) throws Exception {
        context = null;
    }

    public static Image getImage(String iconPath) {
        ImageDescriptor des = getImageDesciptor(iconPath);
        return des.createImage();
    }

    public static ImageDescriptor getImageDesciptor(String iconPath) {

        if (context == null) { // Testing
            final File file = new File("../org.eclipse.richbeans.widgets/" + iconPath);
            final ImageData data = file.exists() ? new ImageData(file.getAbsolutePath())
                    : new ImageData(16, 16, 24, new PaletteData(0xff0000, 0x00ff00, 0x0000ff));
            return new ImageDescriptor() {
                @Override
                public ImageData getImageData() {
                    return data;
                }
            };
        }

        Bundle bundle = context.getBundle();

        // look for the image (this will check both the plugin and fragment
        // folders
        URL fullPathString = bundle.getEntry(iconPath);
        if (fullPathString == null) {
            try {
                fullPathString = new URL(iconPath);
            } catch (MalformedURLException e) {
                return null;
            }
        }

        return ImageDescriptor.createFromURL(fullPathString);
    }

    public static <T> T getService(Class<T> serviceClass) {
        ServiceReference<T> ref = context.getServiceReference(serviceClass);
        return context.getService(ref);
    }

    public static Object getService(String serviceClass) {
        ServiceReference<?> ref = context.getServiceReference(serviceClass);
        return context.getService(ref);
    }

}