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/jEdit/tags/jedit-4-5-pre1/org/gjt/sp/jedit/bsh/BSHArguments.java

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Java | 74 lines | 18 code | 6 blank | 50 comment | 3 complexity | eac1110f68cf4b98e14892d15c106d77 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 *
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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      *
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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 org.gjt.sp.jedit.bsh;
36
37class BSHArguments extends SimpleNode
38{
39    BSHArguments(int id) { super(id); }
40
41	/**
42		This node holds a set of arguments for a method invocation or
43		constructor call.
44
45		Note: arguments are not currently allowed to be VOID.
46	*/
47	/*
48		Disallowing VOIDs here was an easy way to support the throwing of a 
49		more descriptive error message on use of an undefined argument to a 
50		method call (very common).  If it ever turns out that we need to 
51		support that for some reason we'll have to re-evaluate how we get 
52		"meta-information" about the arguments in the various invoke() methods 
53		that take Object [].  We could either pass BSHArguments down to 
54		overloaded forms of the methods or throw an exception subtype 
55		including the argument position back up, where the error message would
56		be compounded.
57	*/
58    public Object[] getArguments( CallStack callstack, Interpreter interpreter)
59		throws EvalError
60    {
61        // evaluate each child
62        Object[] args = new Object[jjtGetNumChildren()];
63        for(int i = 0; i < args.length; i++)
64		{
65            args[i] = ((SimpleNode)jjtGetChild(i)).eval(callstack, interpreter);
66			if ( args[i] == Primitive.VOID )
67				throw new EvalError( "Undefined argument: " + 
68					((SimpleNode)jjtGetChild(i)).getText(), this, callstack );
69		}
70
71        return args;
72    }
73}
74