KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > bsh > BSHAmbiguousName


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
35 package bsh;
36
37 class BSHAmbiguousName extends SimpleNode
38 {
39     public String JavaDoc text;
40
41     BSHAmbiguousName(int id) { super(id); }
42     
43     public Name getName( NameSpace namespace )
44     {
45         return namespace.getNameResolver( text );
46     }
47
48     public Object JavaDoc toObject( CallStack callstack, Interpreter interpreter )
49         throws EvalError
50     {
51         return toObject( callstack, interpreter, false );
52     }
53
54     Object JavaDoc toObject(
55         CallStack callstack, Interpreter interpreter, boolean forceClass )
56         throws EvalError
57     {
58         try {
59             return
60                 getName( callstack.top() ).toObject(
61                     callstack, interpreter, forceClass );
62         } catch ( UtilEvalError e ) {
63 //e.printStackTrace();
64 throw e.toEvalError( this, callstack );
65         }
66     }
67
68     public Class JavaDoc toClass( CallStack callstack, Interpreter interpreter )
69         throws EvalError
70     {
71         try {
72             return getName( callstack.top() ).toClass();
73         } catch ( ClassNotFoundException JavaDoc e ) {
74             throw new EvalError( e.getMessage(), this, callstack );
75         } catch ( UtilEvalError e2 ) {
76             // ClassPathException is a type of UtilEvalError
77 throw e2.toEvalError( this, callstack );
78         }
79     }
80
81     public LHS toLHS( CallStack callstack, Interpreter interpreter)
82         throws EvalError
83     {
84         try {
85             return getName( callstack.top() ).toLHS( callstack, interpreter );
86         } catch ( UtilEvalError e ) {
87             throw e.toEvalError( this, callstack );
88         }
89     }
90
91     /*
92         The interpretation of an ambiguous name is context sensitive.
93         We disallow a generic eval( ).
94     */
95     public Object JavaDoc eval( CallStack callstack, Interpreter interpreter )
96         throws EvalError
97     {
98         throw new InterpreterError(
99             "Don't know how to eval an ambiguous name!"
100             +" Use toObject() if you want an object." );
101     }
102
103     public String JavaDoc toString() {
104         return "AmbigousName: "+text;
105     }
106 }
107
108
Popular Tags