bundles/org.eclipse.ui.workbench/Eclipse UI/org/eclipse/ui/internal/dialogs/ListContentProvider.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.ui.internal.dialogs;

import java.util.List;

import org.eclipse.jface.viewers.IStructuredContentProvider;
import org.eclipse.jface.viewers.Viewer;

/** 
 * Provides elements from a List.
 */
public class ListContentProvider implements IStructuredContentProvider {
	List contents;

	public ListContentProvider() {
	}
	/**
	 * Implements IStructuredContentProvider.
	 * 
	 * @see org.eclipse.jface.viewers.IStructuredContentProvider#getElements(Object)
	 */
	public Object[] getElements(Object input) {
		if (contents != null && contents == input) {
			return contents.toArray();
		}
		return new Object[0];
	}
	/**
	 * Implements IContentProvider.
	 * 
	 * @see org.eclipse.jface.viewers.IContentProvider#inputChanged(Viewer, Object, Object)
	 */
	public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
		if (newInput instanceof List) {
			contents = (List) newInput;
		}
		else {
			contents = null;
		}
	}
	/**
	 * Implements IContentProvider.
	 * 
	 * @see org.eclipse.jface.viewers.IContentProvider#dispose()
	 */
	public void dispose() {
	}
}