/****************************************************************************
* Copyright (c) 2004, 2007 Composent, Inc. and others.
* 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:
* Composent, Inc. - initial API and implementation
*****************************************************************************/
package org.eclipse.ecf.presence.ui;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.core.runtime.Platform;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.swt.graphics.Image;
import org.eclipse.ui.model.IWorkbenchAdapter;
/**
* Label provider for multiple roster viewer. This label provider implements an
* LabelProvider suitable for use by viewers that accepts LabelProvider as
* input. This class may be subclassed in order to customize the
* behavior/display of other label providers.
*
*/
public class MultiRosterLabelProvider extends LabelProvider {
private Map imageTable = new HashMap(7);
/**
* @param element
* @return IWorkbenchAdapter for the given element
*/
protected IWorkbenchAdapter getAdapter(Object element) {
IWorkbenchAdapter adapter = null;
if (element instanceof IAdaptable)
adapter = (IWorkbenchAdapter) ((IAdaptable) element)
.getAdapter(IWorkbenchAdapter.class);
if (element != null && adapter == null)
adapter = (IWorkbenchAdapter) Platform.getAdapterManager()
.loadAdapter(element, IWorkbenchAdapter.class.getName());
return adapter;
}
/*
* (non-Javadoc)
*
* @see org.eclipse.jface.viewers.LabelProvider#getImage(java.lang.Object)
*/
public Image getImage(Object element) {
IWorkbenchAdapter adapter = getAdapter(element);
if (adapter == null)
return null;
ImageDescriptor descriptor = adapter.getImageDescriptor(element);
if (descriptor == null)
return null;
Image image = (Image) imageTable.get(descriptor);
if (image == null) {
image = descriptor.createImage();
imageTable.put(descriptor, image);
}
return image;
}
/*
* (non-Javadoc)
*
* @see org.eclipse.jface.viewers.LabelProvider#getText(java.lang.Object)
*/
public String getText(Object element) {
IWorkbenchAdapter adapter = getAdapter(element);
return adapter == null ? "" : adapter.getLabel(element); //$NON-NLS-1$
}
/*
* (non-Javadoc)
*
* @see org.eclipse.jface.viewers.BaseLabelProvider#dispose()
*/
public void dispose() {
if (imageTable != null) {
for (Iterator i = imageTable.values().iterator(); i.hasNext();) {
((Image) i.next()).dispose();
}
imageTable = null;
}
}
}