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Java > Open Source Codes > org > objectstyle > cayenne > exp > parser > Node


1 /* ====================================================================
2  *
3  * The ObjectStyle Group Software License, version 1.1
4  * ObjectStyle Group - http://objectstyle.org/
5  *
6  * Copyright (c) 2002-2005, Andrei (Andrus) Adamchik and individual authors
7  * of the software. All rights reserved.
8  *
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10  * modification, are permitted provided that the following conditions
11  * are met:
12  *
13  * 1. Redistributions of source code must retain the above copyright
14  * notice, this list of conditions and the following disclaimer.
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16  * 2. Redistributions in binary form must reproduce the above copyright
17  * notice, this list of conditions and the following disclaimer in
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19  * distribution.
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21  * 3. The end-user documentation included with the redistribution, if any,
22  * must include the following acknowlegement:
23  * "This product includes software developed by independent contributors
24  * and hosted on ObjectStyle Group web site (http://objectstyle.org/)."
25  * Alternately, this acknowlegement may appear in the software itself,
26  * if and wherever such third-party acknowlegements normally appear.
27  *
28  * 4. The names "ObjectStyle Group" and "Cayenne" must not be used to endorse
29  * or promote products derived from this software without prior written
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31  * "andrus at objectstyle dot org".
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34  * or "Cayenne", nor may "ObjectStyle" or "Cayenne" appear in their
35  * names without prior written permission.
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37  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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43  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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51  * This software consists of voluntary contributions made by many
52  * individuals and hosted on ObjectStyle Group web site. For more
53  * information on the ObjectStyle Group, please see
54  * <http://objectstyle.org/>.
55  */
56 package org.objectstyle.cayenne.exp.parser;
57
58 /**
59  * Provides basic machinery for constructing the parent and child relationships
60  * between nodes. All AST nodes must implement this interface.
61  *
62  * <p>Generated by JJTree</p>
63  *
64  * @since 1.1
65  */
66 public interface Node {
67
68     /** Called after the node has been made the current
69       node. It indicates that child nodes can now be added to it. */
70     public void jjtOpen();
71
72     /** Called after all the child nodes have been
73       added. */
74     public void jjtClose();
75
76     /** This pair of methods are used to inform the node of its
77       parent. */
78     public void jjtSetParent(Node n);
79     public Node jjtGetParent();
80
81     /** This method tells the node to add its argument to the node's
82       list of children. */
83     public void jjtAddChild(Node n, int i);
84
85     /** This method returns a child node. The children are numbered
86        from zero, left to right. */
87     public Node jjtGetChild(int i);
88
89     /** Return the number of children the node has. */
90     public int jjtGetNumChildren();
91 }
92
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