1 /*
2 * Copyright (c) 2001-2004,
3 * RedVerst Group, ISP RAS http://www.ispras.ru
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright notice, this
10 * list of conditions and the following disclaimer.
11 *
12 * 2. Redistributions in binary form must reproduce the above copyright notice,
13 * this list of conditions and the following disclaimer in the documentation
14 * and/or other materials provided with the distribution.
15 *
16 * 3. The names "ATP", "TreeDL", "RedVerst", "ISP RAS"
17 * may not be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
22 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
23 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
24 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
25 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
26 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
27 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
29 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 package com.unitesk.atp.tree.tool;
33
34 import com.unitesk.atp.tree.Node;
35
36 /***
37 * Computed node attribute.
38 *
39 * @author <A href="mailto:demakov@ispras.ru">Alexey Demakov</A>
40 * @version $Id: Attribute.java,v 1.1 2004/10/09 06:40:12 all-x Exp $
41 */
42 public abstract class Attribute extends Plugin
43 {
44 /***
45 * Returns the type of plugin.
46 */
47 public final String getKind() { return "attribute"; }
48
49 /***
50 * Inheritors must override this method to implement attribute computation.
51 * {@link #setCurrentTree(Tree) setCurrentTree( tree )} must be called
52 * before processing.
53 *
54 * @param tree The tree under processing.
55 * @param node The tree node whose attribute is computed.
56 */
57 public abstract Object get( Tree tree, Node node );
58 }