/jEdit/tags/jedit-4-0-pre3/bsh/BSHTernaryExpression.java

 1/*****************************************************************************
 2 *                                                                           *
 3 *  This file is part of the BeanShell Java Scripting distribution.          *
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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.                                          *
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28 *  Patrick Niemeyer (pat@pat.net)                                           *
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30 *  http://www.pat.net/~pat/                                                 *
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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}