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Java > Open Source Codes > org > jruby > ast > util > RubyAstMarshal


1 /***** BEGIN LICENSE BLOCK *****
2  * Version: CPL 1.0/GPL 2.0/LGPL 2.1
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14  * Copyright (C) 2002-2004 Jan Arne Petersen <jpetersen@uni-bonn.de>
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28 package org.jruby.ast.util;
29
30 import org.ablaf.ast.IAstMarshal;
31 import org.ablaf.internal.ast.SerializationAstMarshal;
32
33 /**
34  *
35  * @author jpetersen
36  */
37 public final class RubyAstMarshal {
38     private static IAstMarshal instance = null;
39
40     private RubyAstMarshal() {
41         assert false;
42     }
43
44     public static synchronized IAstMarshal getInstance() {
45         if (instance == null) {
46             instance = newInstance();
47         }
48         return instance;
49     }
50     
51     /** Create a new IAstMarshal implementation which should
52      * be used in JRuby by default.
53      *
54      * Now we use the SerializationAstMarshal implementation.
55      *
56      * @see org.ablaf.internal.ast.SerializationAstMarshal
57      */
58     private static IAstMarshal newInstance() {
59         return new SerializationAstMarshal();
60     }
61 }
62
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