39  * Represents a protocol version, as specified in RFC 2616.
42  * for the protocol name. It defines a protocol version "SIP/2.0".
46  * This class defines a protocol version as a combination of
47  * protocol name, major version number, and minor version number.
66     /** Name of the protocol. */
67     protected final String protocol;  field in ProtocolVersion
69     /** Major version number of the protocol */
72     /** Minor version number of the protocol */
77      * Create a protocol version designator.
79      * @param protocol   the name of the protocol, for example "HTTP"
80      * @param major      the major version number of the protocol
81      * @param minor      the minor version number of the protocol
83     public ProtocolVersion(String protocol, int major, int minor) {  in ProtocolVersion()  argument
84         if (protocol == null) {  in ProtocolVersion()
86                 ("Protocol name must not be null.");  in ProtocolVersion()
90                 ("Protocol major version number must not be negative.");  in ProtocolVersion()
94                 ("Protocol minor version number may not be negative");  in ProtocolVersion()
96         this.protocol = protocol;  in ProtocolVersion()
102      * Returns the name of the protocol.
104      * @return the protocol name
107         return protocol;  in getProtocol()
111      * Returns the major version number of the protocol.
120      * Returns the minor version number of the HTTP protocol.
130      * Obtains a specific version of this protocol.
141      * @return  a protocol version with the same protocol name
151         return new ProtocolVersion(this.protocol, major, minor);  in forVersion()
158      * @return  the hashcode of this protocol version
161         return this.protocol.hashCode() ^ (this.major * 100000) ^ this.minor;  in hashCode()
166      * Checks equality of this protocol version with an object.
168      * protocol name, major version number, and minor version number.
175      * @return  <code>true</code> if the argument is the same protocol version,
187         return ((this.protocol.equals(that.protocol)) &&  in equals()
194      * Checks whether this protocol can be compared to another one.
195      * Only protocol versions with the same protocol name can be
198      * @param that      the protocol version to consider
204         return (that != null) && this.protocol.equals(that.protocol);  in isComparable()
209      * Compares this protocol version with another one.
210      * Only protocol versions with the same protocol name can be compared.
221      *         if the argument has a different protocol name than this object,
227                 ("Protocol version must not be null.");   in compareToVersion()
229         if (!this.protocol.equals(that.protocol)) {  in compareToVersion()
244      * Tests if this protocol version is greater or equal to the given one.
248      * @return  <code>true</code> if this protocol version is
259      * Tests if this protocol version is less or equal to the given one.
263      * @return  <code>true</code> if this protocol version is
274      * Converts this protocol version to a string.
276      * @return  a protocol version string, like "HTTP/1.1"
280         buffer.append(this.protocol);   in toString()