/*******************************************************************************
* Copyright (c) 2012-2015 Codenvy, S.A.
* 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:
* Codenvy, S.A. - initial API and implementation
*******************************************************************************/
package org.eclipse.jdt.internal.ui.viewsupport;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.swt.graphics.Image;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
/**
* @author Evgen Vidolob
*/
public class ImageDescriptorRegistry {
private Map<ImageDescriptor, Image> fRegistry = Collections.synchronizedMap(new HashMap<ImageDescriptor, Image>(10));
/**
* Returns the image associated with the given image descriptor.
*
* @param descriptor the image descriptor for which the registry manages an image,
* or <code>null</code> for a missing image descriptor
* @return the image associated with the image descriptor or <code>null</code>
* if the image descriptor can't create the requested image.
*/
public Image get(ImageDescriptor descriptor) {
if (descriptor == null)
descriptor = ImageDescriptor.getMissingImageDescriptor();
Image result = fRegistry.get(descriptor);
if (result != null)
return result;
result = new Image(descriptor);
if (result != null)
fRegistry.put(descriptor, result);
return result;
}
}