//  Copyright 2004 The Apache Software Foundation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package org.apache.tapestry.contrib.tree.model;

import java.util.Set;

/**
 * @author ceco
 * @version $Id$
 */

public interface ITreeStateModel {
	Set getExpandSelection();
	/*
	 * Return the selected node unique key
	 */
	Object getSelectedNode();

	void expand(Object objUniqueKey);
	void expandPath(Object objUniqueKey);
	void collapse(Object objUniqueKey);
	void collapsePath(Object objUniqueKey);

	boolean isUniqueKeyExpanded(Object objUniqueKey);
	
	void resetState();
}