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/jEdit/tags/jedit-4-0-pre5/bsh/BSHTernaryExpression.java

#
Java | 60 lines | 16 code | 7 blank | 37 comment | 1 complexity | 17baa9f21cc0143ab8905c8d0ac98545 MD5 | raw file
 1/*****************************************************************************
 2 *                                                                           *
 3 *  This file is part of the BeanShell Java Scripting distribution.          *
 4 *  Documentation and updates may be found at http://www.beanshell.org/      *
 5 *                                                                           *
 6 *  Sun Public License Notice:                                               *
 7 *                                                                           *
 8 *  The contents of this file are subject to the Sun Public License Version  *
 9 *  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 *****************************************************************************/
33
34
35package bsh;
36
37/**
38	This class needs logic to prevent the right hand side of boolean logical
39	expressions from being naively evaluated...  e.g. for "foo && bar" bar 
40	should not be evaluated in the case where foo is true.
41*/
42class BSHTernaryExpression extends SimpleNode {
43
44    BSHTernaryExpression(int id) { super(id); }
45
46    public Object eval( CallStack callstack, Interpreter interpreter) 
47		throws EvalError
48    {
49        SimpleNode
50			cond = (SimpleNode)jjtGetChild(0),
51			evalTrue = (SimpleNode)jjtGetChild(1),
52			evalFalse = (SimpleNode)jjtGetChild(2);
53
54		if ( BSHIfStatement.evaluateCondition( cond, callstack, interpreter ) )
55			return evalTrue.eval( callstack, interpreter );
56		else
57			return evalFalse.eval( callstack, interpreter );
58    }
59
60}