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Java > Open Source Codes > org > netbeans > modules > tasklist > usertasks > util > TreeAbstraction


1 /*
2  * The contents of this file are subject to the terms of the Common Development
3  * and Distribution License (the License). You may not use this file except in
4  * compliance with the License.
5  *
6  * You can obtain a copy of the License at http://www.netbeans.org/cddl.html
7  * or http://www.netbeans.org/cddl.txt.
8  *
9  * When distributing Covered Code, include this CDDL Header Notice in each file
10  * and include the License file at http://www.netbeans.org/cddl.txt.
11  * If applicable, add the following below the CDDL Header, with the fields
12  * enclosed by brackets [] replaced by your own identifying information:
13  * "Portions Copyrighted [year] [name of copyright owner]"
14  *
15  * The Original Software is NetBeans. The Initial Developer of the Original
16  * Code is Sun Microsystems, Inc. Portions Copyright 1997-2006 Sun
17  * Microsystems, Inc. All Rights Reserved.
18  */
19
20 package org.netbeans.modules.tasklist.usertasks.util;
21
22 /**
23  * A Tree.
24  *
25  * T is the type for nodes.
26  *
27  * @author tl
28  */
29 public interface TreeAbstraction<T> {
30     /**
31      * Returns the root of the tree.
32      *
33      * @return root node
34      */
35     public T getRoot();
36     
37     /**
38      * Returns the number of children of a node.
39      *
40      * @param obj a node
41      * @return number of children.
42      */
43     public int getChildCount(T obj);
44     
45     /**
46      * Returns a child of a node.
47      *
48      * @param obj a node
49      * @param index index of the child
50      */
51     public T getChild(T obj, int index);
52 }
53
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