import org.eclipse.emf.edit.provider.ComposedImage; //导入依赖的package包/类
/**
 * Encodes the {@link DSLBreakpoint#IMAGE_ATTRIBUTE}.
 * 
 * @param image
 *            the {@link Object} image
 * @return the attribute {@link String}
 * @throws IOException
 *             if encoding fails
 */
private static String toAttribute(Object image) throws IOException {
	final String res;

	StringBuffer buffer = new StringBuffer();
	if (image instanceof ComposedImage) {
		toAttribute(buffer, (ComposedImage)image);
		if (buffer.length() != 0) {
			res = buffer.substring(0, buffer.length() - 1);
		} else {
			res = buffer.toString();
		}
	} else if (image instanceof URL) {
		buffer.append(Base64.encode((URL_MARKER + (URL)image).toString().getBytes(UTF8)));
		res = buffer.toString();
	} else if (image instanceof URI) {
		buffer.append(Base64.encode(((URI_MARKER + (URI)image).toString()).getBytes(UTF8)));
		res = buffer.toString();
	} else {
		res = toAttribute(DebugEditPlugin.INSTANCE.getImage(FULL_OBJ16_BREAKPOINT));
	}

	return res;
}
 

import org.eclipse.emf.edit.provider.ComposedImage; //导入依赖的package包/类
/**
 * {@inheritDoc}
 * 
 * @see org.eclipse.debug.ui.IDebugModelPresentation#getImage(java.lang.Object)
 */
public Image getImage(final Object element) {
	final Image res;

	final Object unwrapped = unwrapp(element);
	if (unwrapped instanceof Variable) {
		res = getImage(((Variable)unwrapped).getValue());
	} else if (element instanceof DSLBreakpoint) {
		final Object image = ((DSLBreakpoint)element).getImage();
		if (image instanceof ComposedImage) {
			((ComposedImage)image).getImages().add(DebugIdeUiPlugin.INSTANCE.getImage(
					"full/deco16/breakpoint_enabled"));
		}
		final ImageDescriptor descriptor = ExtendedImageRegistry.getInstance().getImageDescriptor(image);
		Image cachedImage = imagesCache.get(descriptor);
		if (cachedImage == null) {
			cachedImage = new Image(Display.getDefault(), descriptor.getImageData());
			imagesCache.put(descriptor, cachedImage);
		}
		res = cachedImage;
	} else {
		if (unwrapped != null) {
			synchronized(unwrapped) {
				res = eLabelProvider.getImage(unwrapped);
			}
		} else {
			res = null;
		}
	}

	return res;
}
 

import org.eclipse.emf.edit.provider.ComposedImage; //导入依赖的package包/类
/**
 * This returns Record.gif.
 * <!-- begin-user-doc -->
 * <!-- end-user-doc -->
 * @generated NOT
 */
@Override
public Object getImage(Object object) {
	List<Object> images = new ArrayList<Object>(2);
	images.add(getResourceLocator().getImage("full/obj16/Record"));
	if (((Record)object).getStatistics() != null) {
		images.add(getResourceLocator().getImage("full/ovr16/hasrecord"));
	}
	return new ComposedImage(images);
}
 

import org.eclipse.emf.edit.provider.ComposedImage; //导入依赖的package包/类
private static Object overlay(final Object base, final Object... overlayed) {
    final ComposedImage composed = base instanceof ComposedImage ? (ComposedImage) base : new ComposedImage(
            asList(base));
    composed.getImages().addAll(asList(overlayed));
    return composed;
}
 

import org.eclipse.emf.edit.provider.ComposedImage; //导入依赖的package包/类
/**
 * Compose two images to derive a combined icon.
 *
 * @param baseImage
 *            The base image to combine.
 * @param itemProvider
 *            The item provider to retrieve the resource locator.
 * @param imagePath
 *            The path to the image to be overlaid. (relative to /icons/)
 * @return The composed image object.
 */
public static Object composeImage(Object baseImage, DiffItemProvider itemProvider, String imagePath) {
    List<Object> images = new ArrayList<Object>(2);
    images.add(baseImage);
    images.add(itemProvider.getResourceLocator().getImage(imagePath));
    return new ComposedImage(images);
}
 

import org.eclipse.emf.edit.provider.ComposedImage; //导入依赖的package包/类
/**
 * Compose two images to derive a combined icon.
 *
 * @param baseImage
 *            The base image to combine.
 * @param count
 *            The number to select an overlay for.
 * @return The composed image object.
 */
private Object overlayVariantCount(Object baseImage, int count) {
    List<Object> images = new ArrayList<Object>(2);
    images.add(baseImage);
    images.add(getResourceLocator().getImage("overlay/count-" + count));
    return new ComposedImage(images);
}