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/*
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*/
using System;
namespace org.apache.qpid.transport.util
{
public class UUID
{
private long _mostSigBits;
private long _leastSigBits;
private static readonly Random _random = new Random();
private static readonly object _randomLock = new object();
public UUID(long mostSigBits, long leastSigBits)
{
_mostSigBits = mostSigBits;
_leastSigBits = leastSigBits;
}
public long MostSignificantBits
{
get { return _mostSigBits; }
set { _mostSigBits = value; }
}
public long LeastSignificantBits
{
get { return _leastSigBits; }
set { _leastSigBits = value; }
}
internal UUID(byte[] r)
{
MostSignificantBits = 0;
LeastSignificantBits = 0;
for (int i = 0; i < 8; i++)
MostSignificantBits = (MostSignificantBits << 8) | (r[i] & 0xff);
for (int i = 8; i < 16; i++)
LeastSignificantBits = (LeastSignificantBits << 8) | (r[i] & 0xff);
}
public static UUID RandomUuid()
{
byte[] randomBytes = new byte[16];
lock (_randomLock)
{
_random.NextBytes(randomBytes);
}
randomBytes[6] &= 0x0f;
randomBytes[6] |= 0x40;
randomBytes[8] &= 0x3f;
randomBytes[8] |= 0x80;
return new UUID(randomBytes);
}
public override String ToString()
{
return (Digits(_mostSigBits >> 32, 8) + "-" +
Digits(_mostSigBits >> 16, 4) + "-" +
Digits(_mostSigBits, 4) + "-" +
Digits(_leastSigBits >> 48, 4) + "-" +
Digits(_leastSigBits, 12));
}
private static String Digits(long val, int digits)
{
long hi = 1L << (digits * 4);
return Convert.ToString((hi | (val & (hi - 1))), 16);
}
#region equality
public bool Equals(UUID other)
{
if (ReferenceEquals(null, other)) return false;
if (ReferenceEquals(this, other)) return true;
return other._mostSigBits == _mostSigBits && other._leastSigBits == _leastSigBits;
}
public override bool Equals(object obj)
{
if (ReferenceEquals(null, obj)) return false;
if (ReferenceEquals(this, obj)) return true;
if (obj.GetType() != typeof (UUID)) return false;
return Equals((UUID) obj);
}
public override int GetHashCode()
{
unchecked
{
return (_mostSigBits.GetHashCode()*397) ^ _leastSigBits.GetHashCode();
}
}
public static bool operator ==(UUID left, UUID right)
{
return Equals(left, right);
}
public static bool operator !=(UUID left, UUID right)
{
return !Equals(left, right);
}
#endregion
}
}
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