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Java > Open Source Codes > com > sun > enterprise > admin > jmx > remote > internal > Shifter


1 /*
2  * The contents of this file are subject to the terms
3  * of the Common Development and Distribution License
4  * (the License). You may not use this file except in
5  * compliance with the License.
6  *
7  * You can obtain a copy of the license at
8  * https://glassfish.dev.java.net/public/CDDLv1.0.html or
9  * glassfish/bootstrap/legal/CDDLv1.0.txt.
10  * See the License for the specific language governing
11  * permissions and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL
14  * Header Notice in each file and include the License file
15  * at glassfish/bootstrap/legal/CDDLv1.0.txt.
16  * If applicable, add the following below the CDDL Header,
17  * with the fields enclosed by brackets [] replaced by
18  * you own identifying information:
19  * "Portions Copyrighted [year] [name of copyright owner]"
20  *
21  * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
22  */
23
24 /* Shifter.java
25  * $Id: Shifter.java,v 1.3 2005/12/25 04:26:34 tcfujii Exp $
26  * $Revision: 1.3 $
27  * $Date: 2005/12/25 04:26:34 $
28  * Indentation Information:
29  * 0. Please (try to) preserve these settings.
30  * 1. Tabs are preferred over spaces.
31  * 2. In vi/vim -
32  * :set tabstop=4 :set shiftwidth=4 :set softtabstop=4
33  * 3. In S1 Studio -
34  * 1. Tools->Options->Editor Settings->Java Editor->Tab Size = 4
35  * 2. Tools->Options->Indentation Engines->Java Indentation Engine->Expand Tabs to Spaces = False.
36  * 3. Tools->Options->Indentation Engines->Java Indentation Engine->Number of Spaces per Tab = 4.
37  */
38
39 package com.sun.enterprise.admin.jmx.remote.internal;
40
41
42 /**
43  *
44  * @author <a HREF="mailto:Kedar.Mhaswade@sun.com">Kedar Mhaswade</a>
45  * @since S1AS8.0
46  * @version $Revision: 1.3 $
47  */
48 public final class Shifter {
49     
50     private Object JavaDoc[] args;
51     public Shifter(Object JavaDoc[] in) {
52         if (in == null)
53             throw new IllegalArgumentException JavaDoc("null array");
54         this.args = new Object JavaDoc[in.length];
55         System.arraycopy(in, 0, args, 0, in.length);
56     }
57     
58     public void shiftRight(Object JavaDoc addition) {
59         if (addition == null)
60             throw new IllegalArgumentException JavaDoc ("Null argument");
61         final Object JavaDoc[] tmp = new Object JavaDoc[args.length + 1];
62         tmp[0] = addition;
63         for (int i = 0 ; i < args.length ; i++) {
64             tmp[i + 1] = args[i];
65         }
66         args = tmp;
67     }
68     
69     public Object JavaDoc shiftLeft() {
70         if (args.length == 0)
71             throw new IllegalStateException JavaDoc("Can't Shift left, no elements");
72         final Object JavaDoc ret = args[0];
73         final Object JavaDoc[] tmp = new Object JavaDoc[args.length - 1];
74         for (int i = 0 ; i < tmp.length ; i++) {
75             tmp[i] = args[i + 1];
76         }
77         args = tmp;
78         return ( ret );
79     }
80     
81     public Object JavaDoc[] state() {
82         return ( args );
83     }
84 }
85
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