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Java > Open Source Codes > org > jruby > runtime > marshal > MarshalCache


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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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 Jan Arne Petersen <jpetersen@uni-bonn.de>
15  * Copyright (C) 2002-2004 Anders Bengtsson <ndrsbngtssn@yahoo.se>
16  * Copyright (C) 2004 Stefan Matthias Aust <sma@3plus4.de>
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18  * Alternatively, the contents of this file may be used under the terms of
19  * either of the GNU General Public License Version 2 or later (the "GPL"),
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29  ***** END LICENSE BLOCK *****/
30 package org.jruby.runtime.marshal;
31
32 import java.io.IOException JavaDoc;
33 import java.util.HashMap JavaDoc;
34 import java.util.Map JavaDoc;
35
36 import org.jruby.RubySymbol;
37 import org.jruby.runtime.builtin.IRubyObject;
38
39 public class MarshalCache {
40     private Map JavaDoc linkCache = new HashMap JavaDoc();
41     private Map JavaDoc symbolCache = new HashMap JavaDoc();
42
43     public boolean isRegistered(IRubyObject value) {
44         return selectCache(value).containsKey(value);
45     }
46
47     public void register(IRubyObject value) {
48         Map JavaDoc cache = selectCache(value);
49         cache.put(value, new Integer JavaDoc(cache.size()));
50     }
51
52     private int registeredIndex(IRubyObject value) {
53         return ((Integer JavaDoc) selectCache(value).get(value)).intValue();
54     }
55
56     private Map JavaDoc selectCache(IRubyObject value) {
57         return (value instanceof RubySymbol) ? symbolCache : linkCache;
58     }
59
60     public void writeLink(MarshalStream output, IRubyObject value) throws IOException JavaDoc {
61         output.write(linkType(value));
62         output.writeInt(registeredIndex(value));
63     }
64
65     private static char linkType(IRubyObject value) {
66         return (value instanceof RubySymbol) ? ';' : '@';
67     }
68 }
69
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