devicelistcontentprovider.java

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/**
 * Copyright (c) 2003-2006 Craig Setera
 * All Rights Reserved.
 * Licensed under the Eclipse Public License - v 1.0
 * For more information see http://www.eclipse.org/legal/epl-v10.html
 */
package eclipseme.ui.internal.devices;

import java.util.List;

import org.eclipse.core.runtime.IStatus;
import org.eclipse.jface.viewers.IStructuredContentProvider;
import org.eclipse.jface.viewers.Viewer;

import eclipseme.core.internal.EclipseMECorePlugin;
import eclipseme.core.model.device.DeviceRegistry;
import eclipseme.core.model.device.IDevice;
import eclipseme.core.persistence.PersistenceException;

/**
 * A content provider implementation that wraps the device
 * registry and provides the complete list of currently
 * registered devices in a sorted order.
 * <p />
 * Copyright (c) 2003-2006 Craig Setera<br>
 * All Rights Reserved.<br>
 * Licensed under the Eclipse Public License - v 1.0<p/>
 * <br>
 * $Revision: 1.1 $
 * <br>
 * $Date: 2006/02/11 21:27:11 $
 * <br>
 * @author Craig Setera
 */
public class DeviceListContentProvider implements IStructuredContentProvider {
	private static final Object[] NO_ELEMENTS = new Object[0];
	
	/**
	 * @see org.eclipse.jface.viewers.IContentProvider#dispose()
	 */
	public void dispose() {
		// Nothing to dispose
	}

	/**
	 * @see org.eclipse.jface.viewers.IStructuredContentProvider#getElements(java.lang.Object)
	 */
	public Object[] getElements(Object inputElement) {
		Object[] elements = NO_ELEMENTS;
		
		
		List deviceList;
		try {
			deviceList = DeviceRegistry.singleton.getAllDevices();
			elements = (IDevice[]) deviceList.toArray(new IDevice[deviceList.size()]);
		} catch (PersistenceException e) {
			EclipseMECorePlugin.log(IStatus.WARNING, "Error retrieving devices", e);
		}
		
		return elements;
	}

	/**
	 * @see org.eclipse.jface.viewers.IContentProvider#inputChanged(org.eclipse.jface.viewers.Viewer, java.lang.Object, java.lang.Object)
	 */
	public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
		// Input can't be changed
	}
}