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


1 /***** BEGIN LICENSE BLOCK *****
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 Thomas E Enebo <enebo@acm.org>
15  * Copyright (C) 2006 Derek Berner <derek.berner@state.nm.us>
16  * Copyright (C) 2006 Miguel Covarrubias <mlcovarrubias@gmail.com>
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30 package org.jruby.runtime.builtin.meta;
31
32 import org.jruby.Ruby;
33 import org.jruby.RubyClass;
34 import org.jruby.RubySymbol;
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 public class SymbolMetaClass extends ObjectMetaClass {
42     public SymbolMetaClass(Ruby runtime) {
43         super("Symbol", RubySymbol.class, runtime.getObject(), ObjectAllocator.NOT_ALLOCATABLE_ALLOCATOR);
44         this.index = ClassIndex.SYMBOL;
45     }
46     
47     private SymbolMetaClass(String JavaDoc name, RubyClass superClass, ObjectAllocator allocator, SinglyLinkedList parentCRef) {
48         super(name, RubySymbol.class, superClass, allocator, parentCRef);
49     }
50     
51     protected class SymbolMeta extends Meta {
52         public void initializeClass() {
53             defineFastMethod("==", Arity.singleArgument(), "equal");
54             
55             defineFastMethod("freeze", Arity.noArguments());
56             defineFastMethod("hash", Arity.noArguments());
57             defineFastMethod("inspect", Arity.noArguments());
58             defineFastMethod("taint", Arity.noArguments());
59             defineFastMethod("to_i", Arity.noArguments());
60             defineFastMethod("to_s", Arity.noArguments());
61             defineFastMethod("to_sym", Arity.noArguments());
62             defineFastSingletonMethod("all_symbols", Arity.noArguments());
63             defineAlias("id2name", "to_s");
64             defineAlias("to_int", "to_i");
65             
66             getMetaClass().undefineMethod("new");
67         }
68     };
69     
70     protected Meta getMeta() {
71         return new SymbolMeta();
72     }
73     
74     public RubyClass newSubClass(String JavaDoc name, SinglyLinkedList parentCRef) {
75         return new SymbolMetaClass(name, this, ObjectAllocator.NOT_ALLOCATABLE_ALLOCATOR, parentCRef);
76     }
77     
78     public IRubyObject all_symbols() {
79         return getRuntime().newArrayNoCopy(getRuntime().getSymbolTable().all_symbols());
80     }
81 }
82
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