// The contents of this file are subject to the Mozilla Public License
// Version 1.1 (the "License"); you may not use this file except in
// compliance with the License. You may obtain a copy of the License
// at http://www.mozilla.org/MPL/
//
// Software distributed under the License is distributed on an "AS IS"
// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
// the License for the specific language governing rights and
// limitations under the License.
//
// The Original Code is RabbitMQ.
//
// The Initial Developer of the Original Code is VMware, Inc.
// Copyright (c) 2007-2011 VMware, Inc. All rights reserved.
//
package com.rabbitmq.client.impl;
/**
* Encapsulation of AMQP protocol version
*/
public class Version {
private final int _major;
private final int _minor;
/**
* Creates a new <code>Version</code> instance.
*
* @param major the AMQP major version number
* @param minor the AMQP minor version number
*/
public Version(int major, int minor) {
_major = major;
_minor = minor;
}
/**
* Retrieve the major version number.
* @return the major version number
*/
public int getMajor() {
return _major;
}
/**
* Retrieve the minor version number.
* @return the minor version number
*/
public int getMinor() {
return _minor;
}
/**
* Retrieve a String representation of the version in the standard
* AMQP version format of <major>-<minor>
*
* @return a <code>String</code> representation of the version
* @see Object#toString()
*/
@Override public String toString() {
return "" + getMajor() + "-" + getMinor();
}
@Override public boolean equals(Object o) {
if(o instanceof Version) {
Version other = (Version)o;
return
this.getMajor() == other.getMajor() &&
this.getMinor() == other.getMinor();
} else {
return false;
}
}
@Override public int hashCode() {
return 31 * getMajor()+ getMinor();
}
/**
* Adjust a version for spec weirdness.
*
* The AMQP 0-8 spec confusingly defines the version as 8-0. This
* method maps the latter to the former.
*
* @return the adjusted <code>Version</code>
*/
public Version adjust() {
return (getMajor() == 8 && getMinor() == 0) ?
new Version(0, 8) : this;
}
/**
* Check compatibility of a client and server version, from the
* client's perspective.
*
* @param clientVersion the client <code>Version</code>
* @param serverVersion the server <code>Version</code>
* @return a <code>boolean</code> value
*/
public static boolean checkVersion(Version clientVersion,
Version serverVersion) {
return clientVersion.adjust().equals(serverVersion.adjust());
}
}