InternalBindingKey.java revision 608:7e06bf1dcb09 
1/*
2 * Copyright (c) 1999, 2003, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26package com.sun.corba.se.impl.naming.pcosnaming;
27
28import java.io.Serializable;
29import org.omg.CosNaming.NameComponent;
30
31
32/**
33 * Class InternalBindingKey implements the necessary wrapper code
34 * around the org.omg.CosNaming::NameComponent class to implement the proper
35 * equals() method and the hashCode() method for use in a hash table.
36 * It computes the hashCode once and stores it, and also precomputes
37 * the lengths of the id and kind strings for faster comparison.
38 */
39public class InternalBindingKey
40        implements Serializable
41{
42
43    // computed by serialver tool
44    private static final long serialVersionUID = -5410796631793704055L;
45
46    public String id;
47    public String kind;
48
49    // Default Constructor
50    public InternalBindingKey() {}
51
52    // Normal constructor
53    public InternalBindingKey(NameComponent n)
54    {
55        setup(n);
56    }
57
58    // Setup the object
59    protected void setup(NameComponent n) {
60        this.id = n.id;
61        this.kind = n.kind;
62    }
63
64    // Compare the keys by comparing name's id and kind
65    public boolean equals(java.lang.Object o) {
66        if (o == null)
67            return false;
68        if (o instanceof InternalBindingKey) {
69            InternalBindingKey that = (InternalBindingKey)o;
70            if( this.id != null && that.id != null )
71            {
72                if (this.id.length() != that.id.length() )
73                {
74                        return false;
75                }
76                // If id is set is must be equal
77                if (this.id.length() > 0 && this.id.equals(that.id) == false)
78                {
79                        return false;
80                }
81            }
82            else
83            {
84                // If One is Null and the other is not then it's a mismatch
85                // So, return false
86                if( ( this.id == null && that.id != null )
87                ||  ( this.id !=null && that.id == null ) )
88                {
89                        return false;
90                }
91            }
92            if( this.kind != null && that.kind != null )
93            {
94                if (this.kind.length() != that.kind.length() )
95                {
96                        return false;
97                }
98                // If kind is set it must be equal
99                if (this.kind.length() > 0 && this.kind.equals(that.kind) == false)
100                {
101                        return false;
102                }
103            }
104            else
105            {
106                // If One is Null and the other is not then it's a mismatch
107                // So, return false
108                if( ( this.kind == null && that.kind != null )
109                ||  ( this.kind !=null && that.kind == null ) )
110                {
111                        return false;
112                }
113            }
114            // We have checked all the possibilities, so return true
115            return true;
116        } else {
117            return false;
118        }
119    }
120
121
122    // Return precomputed value
123    public int hashCode() {
124        int hashVal = 0;
125        if (this.id.length() > 0)
126        {
127            hashVal += this.id.hashCode();
128        }
129        if (this.kind.length() > 0)
130        {
131            hashVal += this.kind.hashCode();
132        }
133        return hashVal;
134    }
135}
136