bundles/org.eclipse.emf.ecp.view.util.swt/src/org/eclipse/emf/ecp/view/internal/util/swt/RCPImageRegistryService.java

/*******************************************************************************
 * Copyright (c) 2011-2014 EclipseSource Muenchen GmbH and others.
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 * Eugen Neufeld - initial API and implementation
 ******************************************************************************/
package org.eclipse.emf.ecp.view.internal.util.swt;

import java.net.URL;

import org.eclipse.emf.ecp.view.spi.util.swt.ImageRegistryService;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.resource.ImageRegistry;
import org.eclipse.swt.graphics.Image;
import org.osgi.framework.Bundle;

/**
 * An {@link ImageRegistryService} which expects exactly one UI Thread.
 *
 * @author Eugen Neufeld
 *
 */
public class RCPImageRegistryService implements ImageRegistryService {

	private ImageRegistry registry;

	@Override
	public Image getImage(Bundle bundle, String path) {
		if (registry == null) {
			registry = new ImageRegistry();
		}
		Image image = registry.get(path);
		if (image == null) {
			final URL url = bundle.getResource(path);
			if (url == null) {
				return null;
			}
			image = ImageDescriptor.createFromURL(url).createImage();
			registry.put(path, image);
		}
		return image;
	}

	@Override
	public Image getImage(URL url) {
		if (registry == null) {
			registry = new ImageRegistry();
		}
		Image image = registry.get(url.toString());
		if (image == null) {
			image = ImageDescriptor.createFromURL(url).createImage();
			registry.put(url.toString(), image);
		}
		return image;
	}

}