01: /***
02: * Retrotranslator: a Java bytecode transformer that translates Java classes
03: * compiled with JDK 5.0 into classes that can be run on JVM 1.4.
04: *
05: * Copyright (c) 2005 - 2008 Taras Puchko
06: * All rights reserved.
07: *
08: * Redistribution and use in source and binary forms, with or without
09: * 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: */package net.sf.retrotranslator.runtime.java.util;
32:
33: import edu.emory.mathcs.backport.java.util.Queue;
34: import java.util.*;
35:
36: /**
37: * @author Taras Puchko
38: */
39: public class _Queue {
40:
41: public static boolean executeInstanceOfInstruction(Object object) {
42: return object instanceof LinkedList || object instanceof Queue;
43: }
44:
45: public static Collection executeCheckCastInstruction(Object object) {
46: if (object instanceof LinkedList) {
47: return (LinkedList) object;
48: }
49: return (Queue) object;
50: }
51:
52: public static Object element(Collection collection) {
53: if (collection instanceof LinkedList) {
54: return _LinkedList.element((LinkedList) collection);
55: }
56: return ((Queue) collection).element();
57: }
58:
59: public static boolean offer(Collection collection, Object element) {
60: if (collection instanceof LinkedList) {
61: return _LinkedList.offer((LinkedList) collection, element);
62: }
63: return ((Queue) collection).offer(element);
64: }
65:
66: public static Object peek(Collection collection) {
67: if (collection instanceof LinkedList) {
68: return _LinkedList.peek((LinkedList) collection);
69: }
70: return ((Queue) collection).peek();
71: }
72:
73: public static Object poll(Collection collection) {
74: if (collection instanceof LinkedList) {
75: return _LinkedList.poll((LinkedList) collection);
76: }
77: return ((Queue) collection).poll();
78: }
79:
80: public static Object remove(Collection collection) {
81: if (collection instanceof LinkedList) {
82: return _LinkedList.remove((LinkedList) collection);
83: }
84: return ((Queue) collection).remove();
85: }
86:
87: }
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