01: /*****************************************************************************
02: * *
03: * This file is part of the BeanShell Java Scripting distribution. *
04: * Documentation and updates may be found at http://www.beanshell.org/ *
05: * *
06: * Sun Public License Notice: *
07: * *
08: * The contents of this file are subject to the Sun Public License Version *
09: * 1.0 (the "License"); you may not use this file except in compliance with *
10: * the License. A copy of the License is available at http://www.sun.com *
11: * *
12: * The Original Code is BeanShell. The Initial Developer of the Original *
13: * Code is Pat Niemeyer. Portions created by Pat Niemeyer are Copyright *
14: * (C) 2000. All Rights Reserved. *
15: * *
16: * GNU Public License Notice: *
17: * *
18: * Alternatively, the contents of this file may be used under the terms of *
19: * the GNU Lesser General Public License (the "LGPL"), in which case the *
20: * provisions of LGPL are applicable instead of those above. If you wish to *
21: * allow use of your version of this file only under the terms of the LGPL *
22: * and not to allow others to use your version of this file under the SPL, *
23: * indicate your decision by deleting the provisions above and replace *
24: * them with the notice and other provisions required by the LGPL. If you *
25: * do not delete the provisions above, a recipient may use your version of *
26: * this file under either the SPL or the LGPL. *
27: * *
28: * Patrick Niemeyer (pat@pat.net) *
29: * Author of Learning Java, O'Reilly & Associates *
30: * http://www.pat.net/~pat/ *
31: * *
32: *****************************************************************************/package bsh;
33:
34: /*
35: All BSH nodes must implement this interface. It provides basic
36: machinery for constructing the parent and child relationships
37: between nodes.
38: */
39: interface Node extends java.io.Serializable {
40: /**
41: This method is called after the node has been made the current
42: node. It indicates that child nodes can now be added to it.
43: */
44: public void jjtOpen();
45:
46: /**
47: This method is called after all the child nodes have been
48: added.
49: */
50: public void jjtClose();
51:
52: /**
53: This pair of methods are used to inform the node of its
54: parent.
55: */
56: public void jjtSetParent(Node n);
57:
58: public Node jjtGetParent();
59:
60: /**
61: This method tells the node to add its argument to the node's
62: list of children.
63: */
64: public void jjtAddChild(Node n, int i);
65:
66: /**
67: This method returns a child node. The children are numbered
68: from zero, left to right.
69: */
70: public Node jjtGetChild(int i);
71:
72: /**
73: Return the number of children the node has.
74: */
75: public int jjtGetNumChildren();
76: }
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