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Java > Open Source Codes > net > sf > retrotranslator > runtime > java > lang > _Readable


1 /***
2  * Retrotranslator: a Java bytecode transformer that translates Java classes
3  * compiled with JDK 5.0 into classes that can be run on JVM 1.4.
4  *
5  * Copyright (c) 2005 - 2007 Taras Puchko
6  * All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  * 1. Redistributions of source code must retain the above copyright
12  * notice, this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  * notice, this list of conditions and the following disclaimer in the
15  * documentation and/or other materials provided with the distribution.
16  * 3. Neither the name of the copyright holders nor the names of its
17  * contributors may be used to endorse or promote products derived from
18  * this software without specific prior written permission.
19  *
20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
24  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
30  * THE POSSIBILITY OF SUCH DAMAGE.
31  */
32 package net.sf.retrotranslator.runtime.java.lang;
33
34 import java.io.*;
35 import java.nio.CharBuffer JavaDoc;
36 import net.sf.retrotranslator.runtime.java.io._Reader;
37 import net.sf.retrotranslator.runtime.java.nio._CharBuffer;
38
39 /**
40  * @author Taras Puchko
41  */
42 public class _Readable {
43
44     public static boolean executeInstanceOfInstruction(Object JavaDoc object) {
45         return object instanceof Reader ||
46                 object instanceof CharBuffer JavaDoc ||
47                 object instanceof Readable_;
48     }
49
50     public static Object JavaDoc executeCheckCastInstruction(Object JavaDoc object) {
51         if (object instanceof Reader) {
52             return (Reader) object;
53         }
54         if (object instanceof CharBuffer JavaDoc) {
55             return (CharBuffer JavaDoc) object;
56         }
57         return (Readable_) object;
58     }
59
60     public static int read(Object JavaDoc object, CharBuffer JavaDoc cb) throws IOException {
61         if (object instanceof Reader) {
62             return _Reader.read((Reader) object, cb);
63         }
64         if (object instanceof CharBuffer JavaDoc) {
65             return _CharBuffer.read((CharBuffer JavaDoc) object, cb);
66         }
67         return ((Readable_) object).read(cb);
68     }
69
70 }
71
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