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Java > Open Source Codes > org > jruby > runtime > builtin > meta > ObjectMetaClass


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2  * Version: CPL 1.0/GPL 2.0/LGPL 2.1
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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
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14  * Copyright (C) 2004 Jan Arne Petersen <jpetersen@uni-bonn.de>
15  * Copyright (C) 2004-2005 Thomas E Enebo <enebo@acm.org>
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29 package org.jruby.runtime.builtin.meta;
30
31 import org.jruby.Ruby;
32 import org.jruby.RubyClass;
33 import org.jruby.RubyModule;
34 import org.jruby.RubyObject;
35 import org.jruby.runtime.Arity;
36 import org.jruby.runtime.ClassIndex;
37 import org.jruby.runtime.ObjectAllocator;
38 import org.jruby.runtime.builtin.IRubyObject;
39 import org.jruby.util.collections.SinglyLinkedList;
40
41 /**
42  * <p>
43  * The meta class for Object
44  * </p>
45  */
46 public class ObjectMetaClass extends AbstractMetaClass {
47     // Only for creating ObjectMetaClass directly
48 public ObjectMetaClass(Ruby runtime) {
49         super(runtime, null /*Would be Class if it existed yet */, null, OBJECT_ALLOCATOR, null, "Object");
50         
51         this.builtinClass = RubyObject.class;
52         this.index = ClassIndex.OBJECT;
53     }
54     
55     // Only for other core modules/classes
56 protected ObjectMetaClass(Ruby runtime, RubyClass metaClass, RubyClass superClass, ObjectAllocator allocator,
57             SinglyLinkedList parentCRef, String JavaDoc name, Class JavaDoc builtinClass) {
58         super(runtime, metaClass, superClass, allocator, parentCRef, name);
59         
60         this.builtinClass = builtinClass;
61     }
62     
63     protected ObjectMetaClass(String JavaDoc name, Class JavaDoc builtinClass, RubyClass superClass, ObjectAllocator allocator) {
64         this(name, builtinClass, superClass, allocator, superClass.getRuntime().getClass("Object").getCRef());
65     }
66
67     protected ObjectMetaClass(String JavaDoc name, Class JavaDoc builtinClass, RubyClass superClass, ObjectAllocator allocator, SinglyLinkedList parentCRef) {
68         super(superClass.getRuntime(), superClass.getRuntime().getClass("Class"), superClass, allocator, parentCRef, name);
69
70         assert builtinClass != null;
71         //assert RubyObject.class.isAssignableFrom(builtinClass) || RubyObject.class == builtinClass: "builtinClass have to be a subclass of RubyObject.";
72 assert superClass != null;
73
74         this.builtinClass = builtinClass;
75
76         makeMetaClass(superClass.getMetaClass(), getCRef());
77         inheritedBy(superClass);
78
79         if(name != null) {
80             ((RubyModule)parentCRef.getValue()).setConstant(name, this);
81         }
82     }
83     
84     protected class ObjectMeta extends Meta {
85         protected void initializeClass() {
86             definePrivateMethod("initialize", Arity.optional());
87             definePrivateMethod("inherited", Arity.singleArgument());
88             defineFastMethod("initialize_copy", Arity.singleArgument());
89         }
90     };
91     
92     protected Meta getMeta() {
93         return new ObjectMeta();
94     }
95     
96     public static ObjectAllocator OBJECT_ALLOCATOR = new ObjectAllocator() {
97         public IRubyObject allocate(Ruby runtime, RubyClass klass) {
98             IRubyObject instance = new RubyObject(runtime, klass);
99             instance.setMetaClass(klass);
100
101             return instance;
102         }
103     };
104     
105     public void initializeClass() {
106         getMeta().initializeClass();
107     }
108     
109 }
110
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