// Copyright (c) 2007-Present Pivotal Software, Inc. All rights reserved.
//
// This software, the RabbitMQ Java client library, is triple-licensed under the
// Mozilla Public License 1.1 ("MPL"), the GNU General Public License version 2
// ("GPL") and the Apache License version 2 ("ASL"). For the MPL, please see
// LICENSE-MPL-RabbitMQ. For the GPL, please see LICENSE-GPL2. For the ASL,
// please see LICENSE-APACHE2.
//
// This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND,
// either express or implied. See the LICENSE file for specific language governing
// rights and limitations of this software.
//
// If you have any questions regarding licensing, please contact us at
// info@rabbitmq.com.
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());
}
}