Imported GNU Classpath 0.90
[official-gcc.git] / libjava / classpath / gnu / javax / net / ssl / provider / ProtocolVersion.java
blob5f5d1d979aaba2a5ac8dc2714274669f66110de8
1 /* ProtocolVersion.java -- An SSL version number.
2 Copyright (C) 2006 Free Software Foundation, Inc.
4 This file is a part of GNU Classpath.
6 GNU Classpath is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or (at
9 your option) any later version.
11 GNU Classpath is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU Classpath; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
19 USA
21 Linking this library statically or dynamically with other modules is
22 making a combined work based on this library. Thus, the terms and
23 conditions of the GNU General Public License cover the whole
24 combination.
26 As a special exception, the copyright holders of this library give you
27 permission to link this library with independent modules to produce an
28 executable, regardless of the license terms of these independent
29 modules, and to copy and distribute the resulting executable under
30 terms of your choice, provided that you also meet, for each linked
31 independent module, the terms and conditions of the license of that
32 module. An independent module is a module which is not derived from
33 or based on this library. If you modify this library, you may extend
34 this exception to your version of the library, but you are not
35 obligated to do so. If you do not wish to do so, delete this
36 exception statement from your version. */
39 package gnu.javax.net.ssl.provider;
41 import java.io.InputStream;
42 import java.io.IOException;
43 import java.io.OutputStream;
45 final class ProtocolVersion implements Comparable, Constructed
48 // Constants and fields.
49 // -------------------------------------------------------------------------
51 static final ProtocolVersion SSL_3 = new ProtocolVersion(3, 0);
52 static final ProtocolVersion TLS_1 = new ProtocolVersion(3, 1);
53 static final ProtocolVersion TLS_1_1 = new ProtocolVersion(3, 2);
55 private final int major;
56 private final int minor;
58 // Constructor.
59 // -------------------------------------------------------------------------
61 private ProtocolVersion(int major, int minor)
63 this.major = major;
64 this.minor = minor;
67 // Class methods.
68 // -------------------------------------------------------------------------
70 static ProtocolVersion read(InputStream in) throws IOException
72 int major = in.read() & 0xFF;
73 int minor = in.read() & 0xFF;
74 return getInstance(major, minor);
77 static ProtocolVersion getInstance(int major, int minor)
79 if (major == 3)
81 switch (minor)
83 case 0: return SSL_3;
84 case 1: return TLS_1;
85 case 2: return TLS_1_1;
88 return new ProtocolVersion(major, minor);
91 // Instance methods.
92 // -------------------------------------------------------------------------
94 public void write(OutputStream out) throws IOException
96 out.write(major);
97 out.write(minor);
100 byte[] getEncoded()
102 return new byte[] {
103 (byte) major, (byte) minor
107 int getMajor()
109 return major;
112 int getMinor()
114 return minor;
117 public boolean equals(Object o)
119 if (o == null || !(o instanceof ProtocolVersion))
121 return false;
123 return ((ProtocolVersion) o).major == this.major
124 && ((ProtocolVersion) o).minor == this.minor;
127 public int hashCode()
129 return major << 8 | minor;
132 public int compareTo(Object o)
134 if (o == null || !(o instanceof ProtocolVersion))
136 return 1;
138 if (this.equals(o))
140 return 0;
142 if (major > ((ProtocolVersion) o).major)
144 return 1;
146 else if (major < ((ProtocolVersion) o).major)
148 return -1;
150 if (minor > ((ProtocolVersion) o).minor)
152 return 1;
154 else if (minor < ((ProtocolVersion) o).minor)
156 return -1;
158 return 0;
161 public String toString()
163 if (this == SSL_3)
165 return "SSLv3";
167 else if (this == TLS_1)
169 return "TLSv1";
171 else if (this == TLS_1_1)
173 return "TLSv1.1";
175 else
177 return "Unsupported; major=" + major + " minor=" + minor;