/*******************************************************************************
 * Copyright (c) 2006, 2007 IBM Corporation 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:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
module org.eclipse.core.internal.databinding.observable.tree.IChildrenCountUpdate;

import java.lang.all;

/**
 * Request monitor used to collect the number of children for an element in a lazy
 * observable tree.
 * 
 * @since 3.3
 */
public interface IChildrenCountUpdate : IViewerUpdate {

    /**
     * Returns the parent elements that children counts have been requested for
     * as tree paths. An empty path identifies the root element.
     * 
     * @return parent elements as tree paths
     */
    public TreePath[] getParents();

    /**
     * Sets the number of children for the given parent.
     * 
     * @param parentPath
     *            parent element or empty path for root element
     * @param numChildren
     *            number of children
     */
    public void setChildCount(TreePath parentPath, int numChildren);
}