/****************************************************************************
 * Copyright (c) 2004 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 org.eclipse.ecf.core.IContainer;
import org.eclipse.ui.IViewPart;

/**
 * Roster view part that supports adding multiple rosters. Implementers of this
 * interface support the addition of an arbitrary number of container instances
 * that adapter to IPresenceContainerAdapter, and provide access to an IRoster
 * instance via a call to
 * <code>IPresenceContainerAdapter.getRosterManager()</code>
 * 
 */
public interface IMultiRosterViewPart extends IViewPart {

	/**
	 * Add container to the roster view. The container provided should adapter
	 * to the IPresenceContainerAdapter. If it does not, then false will be
	 * returned.  Note that this method should only be called by the user interface
	 * thread, and not by some other thread.
	 * 
	 * @param container
	 *            The container provided should adapter to the
	 *            IPresenceContainerAdapter. If it does not (because container is already
	 *            present in this view part), then false will be
	 *            returned.
	 * 
	 * @return <code>true</code> if the given container can be added to this roster view.
	 *         <code>false</code> if not.  If the container has already been added to
	 *         this view part, then will return <code>false</code>.
	 */
	public boolean addContainer(IContainer container);
}