bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/ArrayContentProvider.java

/*******************************************************************************
 * Copyright (c) 2000, 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 Corporation - initial API and implementation
 *******************************************************************************/

package org.eclipse.jface.viewers;

import java.util.Collection;

/**
 * This implementation of <code>IStructuredContentProvider</code> handles
 * the case where the input is an unchanging array or collection of elements.
 */
public class ArrayContentProvider implements IStructuredContentProvider {
	
	/**
	 * Returns the elements in the input, which must be either an array or a
	 * <code>Collection</code>. 
	 */
	public Object[] getElements(Object inputElement) {
		if (inputElement instanceof Object[])
			return (Object[]) inputElement;
		if (inputElement instanceof Collection)
			return ((Collection) inputElement).toArray();
		return new Object[0];
	}
	
	/**
	 * This implementation does nothing.
	 */
	public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
	}

	/**
	 * This implementation does nothing.
	 */
	public void dispose() {
	}
}