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Java > Open Source Codes > net > sf > retrotranslator > runtime > java > util > _Queue


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.util;
33
34 import edu.emory.mathcs.backport.java.util.Queue;
35 import java.util.*;
36
37 /**
38  * @author Taras Puchko
39  */
40 public class _Queue {
41
42     public static boolean executeInstanceOfInstruction(Object JavaDoc object) {
43         return object instanceof LinkedList ||
44                 object instanceof Queue;
45     }
46
47     public static Collection executeCheckCastInstruction(Object JavaDoc object) {
48         if (object instanceof LinkedList) {
49             return (LinkedList) object;
50         }
51         return (Queue) object;
52     }
53
54     public static Object JavaDoc element(Collection collection) {
55         if (collection instanceof LinkedList) {
56             return _LinkedList.element((LinkedList) collection);
57         }
58         return ((Queue) collection).element();
59     }
60
61     public static boolean offer(Collection collection, Object JavaDoc element) {
62         if (collection instanceof LinkedList) {
63             return _LinkedList.offer((LinkedList) collection, element);
64         }
65         return ((Queue) collection).offer(element);
66     }
67
68     public static Object JavaDoc peek(Collection collection) {
69         if (collection instanceof LinkedList) {
70             return _LinkedList.peek((LinkedList) collection);
71         }
72         return ((Queue) collection).peek();
73     }
74
75     public static Object JavaDoc poll(Collection collection) {
76         if (collection instanceof LinkedList) {
77             return _LinkedList.poll((LinkedList) collection);
78         }
79         return ((Queue) collection).poll();
80     }
81
82     public static Object JavaDoc remove(Collection collection) {
83         if (collection instanceof LinkedList) {
84             return _LinkedList.remove((LinkedList) collection);
85         }
86         return ((Queue) collection).remove();
87     }
88
89 }
90
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