/**********************************************************************
 * Copyright (c) 2003 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 *
 * Contributors:
 *    IBM - Initial API and implementation
 **********************************************************************/
package net.sourceforge.phpdt.monitor.ui.internal;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import net.sourceforge.phpdt.monitor.core.IMonitor;
import net.sourceforge.phpdt.monitor.core.MonitorCore;

import org.eclipse.jface.viewers.IStructuredContentProvider;
import org.eclipse.jface.viewers.Viewer;
/**
 * Monitor content provider.
 */
public class MonitorContentProvider implements IStructuredContentProvider {
	/**
	 * MonitorContentProvider constructor comment.
	 */
	public MonitorContentProvider() {
		super();
	}

	/**
	 * Disposes of this content provider.  
	 * This is called by the viewer when it is disposed.
	 */
	public void dispose() { }

	/**
	 * Returns the elements to display in the viewer 
	 * when its input is set to the given element. 
	 * These elements can be presented as rows in a table, items in a list, etc.
	 * The result is not modified by the viewer.
	 *
	 * @param inputElement the input element
	 * @return the array of elements to display in the viewer
	 */
	public Object[] getElements(Object inputElement) {
		List list = new ArrayList();
		Iterator iterator = MonitorCore.getMonitors().iterator();
		while (iterator.hasNext()) {
			IMonitor monitor = (IMonitor) iterator.next();
			list.add(monitor);
		}
		return list.toArray();
	}

	/**
	 * Notifies this content provider that the given viewer's input
	 * has been switched to a different element.
	 * <p>
	 * A typical use for this method is registering the content provider as a listener
	 * to changes on the new input (using model-specific means), and deregistering the viewer 
	 * from the old input. In response to these change notifications, the content provider
	 * propagates the changes to the viewer.
	 * </p>
	 *
	 * @param viewer the viewer
	 * @param oldInput the old input element, or <code>null</code> if the viewer
	 *   did not previously have an input
	 * @param newInput the new input element, or <code>null</code> if the viewer
	 *   does not have an input
	 */
	public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {}
}