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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
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10  * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
11  * implied. See the License for the specific language governing
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13  *
14  * Copyright (C) 2004 Charles O Nutter <headius@headius.com>
15  * Copyright (C) 2004 Stefan Matthias Aust <sma@3plus4.de>
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17  * Alternatively, the contents of this file may be used under the terms of
18  * either of the GNU General Public License Version 2 or later (the "GPL"),
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28  ***** END LICENSE BLOCK *****/
29 package org.jruby;
30
31 import org.jruby.internal.runtime.methods.DynamicMethod;
32 import org.jruby.runtime.Block;
33 import org.jruby.runtime.CallbackFactory;
34 import org.jruby.runtime.ObjectAllocator;
35 import org.jruby.runtime.builtin.IRubyObject;
36
37 /**
38  *
39  * Note: This was renamed from UnboundMethod.java
40  *
41  * @author jpetersen
42  */
43 public class RubyUnboundMethod extends RubyMethod {
44     protected RubyUnboundMethod(Ruby runtime) {
45         super(runtime, runtime.getClass("UnboundMethod"));
46     }
47
48     public static RubyUnboundMethod newUnboundMethod(
49         RubyModule implementationModule,
50         String JavaDoc methodName,
51         RubyModule originModule,
52         String JavaDoc originName,
53         DynamicMethod method) {
54         RubyUnboundMethod newMethod = new RubyUnboundMethod(implementationModule.getRuntime());
55
56         newMethod.implementationModule = implementationModule;
57         newMethod.methodName = methodName;
58         newMethod.originModule = originModule;
59         newMethod.originName = originName;
60         newMethod.method = method;
61
62         return newMethod;
63     }
64
65     public static RubyClass defineUnboundMethodClass(Ruby runtime) {
66         // TODO: NOT_ALLOCATABLE_ALLOCATOR is probably ok here. Confirm. JRUBY-415
67 RubyClass newClass =
68             runtime.defineClass("UnboundMethod", runtime.getClass("Method"), ObjectAllocator.NOT_ALLOCATABLE_ALLOCATOR);
69
70         CallbackFactory callbackFactory = runtime.callbackFactory(RubyUnboundMethod.class);
71         newClass.defineMethod("[]", callbackFactory.getOptMethod("call"));
72         newClass.defineMethod("bind", callbackFactory.getMethod("bind", RubyKernel.IRUBY_OBJECT));
73         newClass.defineMethod("call", callbackFactory.getOptMethod("call"));
74         newClass.defineMethod("to_proc", callbackFactory.getMethod("to_proc"));
75         newClass.defineMethod("unbind", callbackFactory.getMethod("unbind"));
76
77         return newClass;
78     }
79
80     /**
81      * @see org.jruby.RubyMethod#call(IRubyObject[])
82      */
83     public IRubyObject call(IRubyObject[] args, Block block) {
84         throw getRuntime().newTypeError("you cannot call unbound method; bind first");
85     }
86
87     /**
88      * @see org.jruby.RubyMethod#unbind()
89      */
90     public RubyUnboundMethod unbind(Block block) {
91         return this;
92     }
93
94     public RubyMethod bind(IRubyObject aReceiver, Block block) {
95         RubyClass receiverClass = aReceiver.getMetaClass();
96         
97         if (!aReceiver.isKindOf(originModule)) {
98             if (originModule instanceof MetaClass) {
99                 throw getRuntime().newTypeError("singleton method called for a different object");
100             } else if (receiverClass instanceof MetaClass && receiverClass.getMethods().containsKey(originName)) {
101                 throw getRuntime().newTypeError("method `" + originName + "' overridden");
102             } else if (
103                 !(originModule.isModule() ? aReceiver.isKindOf(originModule) : aReceiver.getType() == originModule)) {
104                 // FIX replace type() == ... with isInstanceOf(...)
105 throw getRuntime().newTypeError("bind argument must be an instance of " + originModule.getName());
106             }
107         }
108         return RubyMethod.newMethod(implementationModule, methodName, receiverClass, originName, method, aReceiver);
109     }
110 }
111
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