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Java > Open Source Codes > org > jruby > internal > runtime > methods > AliasMethod


1 /***** BEGIN LICENSE BLOCK *****
2  * Version: CPL 1.0/GPL 2.0/LGPL 2.1
3  *
4  * The contents of this file are subject to the Common Public
5  * License Version 1.0 (the "License"); you may not use this file
6  * except in compliance with the License. You may obtain a copy of
7  * the License at http://www.eclipse.org/legal/cpl-v10.html
8  *
9  * Software distributed under the License is distributed on an "AS
10  * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
11  * implied. See the License for the specific language governing
12  * rights and limitations under the License.
13  *
14  * Copyright (C) 2002 Anders Bengtsson <ndrsbngtssn@yahoo.se>
15  * Copyright (C) 2002-2004 Jan Arne Petersen <jpetersen@uni-bonn.de>
16  * Copyright (C) 2004-2005 Thomas E Enebo <enebo@acm.org>
17  * Copyright (C) 2004 Stefan Matthias Aust <sma@3plus4.de>
18  *
19  * Alternatively, the contents of this file may be used under the terms of
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30  ***** END LICENSE BLOCK *****/
31 package org.jruby.internal.runtime.methods;
32
33 import org.jruby.RubyModule;
34 import org.jruby.runtime.Arity;
35 import org.jruby.runtime.Block;
36 import org.jruby.runtime.ThreadContext;
37 import org.jruby.runtime.builtin.IRubyObject;
38
39 /**
40  *
41  * @author jpetersen
42  */
43 public class AliasMethod extends DynamicMethod {
44     private DynamicMethod oldMethod;
45     private String JavaDoc oldName;
46
47     /*
48      * This code used to try and optimize the case of when oldMethod is an aliasMethod.
49      * This seems a little overkill.
50      */
51     public AliasMethod(DynamicMethod oldMethod, String JavaDoc oldName) {
52         super(oldMethod.getImplementationClass(), oldMethod.getVisibility());
53
54         this.oldName = oldName;
55         this.oldMethod = oldMethod;
56     }
57     
58     public String JavaDoc getOriginalName() {
59         return oldName;
60     }
61
62     public void preMethod(ThreadContext context, RubyModule clazz, IRubyObject self, String JavaDoc name, IRubyObject[] args, boolean noSuper, Block block) {
63     }
64
65     public void postMethod(ThreadContext context) {
66     }
67
68     public IRubyObject internalCall(ThreadContext context, RubyModule clazz, IRubyObject self, String JavaDoc name, IRubyObject[] args, boolean noSuper, Block block) {
69         assert false;
70         return null;
71     }
72     
73     public IRubyObject call(ThreadContext context, IRubyObject self, RubyModule clazz, String JavaDoc name, IRubyObject[] args, boolean noSuper, Block block) {
74         return oldMethod.call(context, self, clazz, name, args, noSuper, block);
75     }
76
77     public DynamicMethod dup() {
78         return new AliasMethod(oldMethod, oldName);
79     }
80     
81     public boolean needsImplementer() {
82         return oldMethod.needsImplementer();
83     }
84
85     public Arity getArity(){
86         return oldMethod.getArity();
87     }
88 }
89
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