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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.
*
*/
package org.apache.qpid.amqp_1_0.transport;
public class SequenceNumber implements Comparable<SequenceNumber>, Cloneable
{
private int _seqNo;
public SequenceNumber(int seqNo)
{
_seqNo = seqNo;
}
public SequenceNumber incr()
{
_seqNo++;
return this;
}
public SequenceNumber decr()
{
_seqNo--;
return this;
}
public static SequenceNumber add(SequenceNumber a, int i)
{
return a.clone().add(i);
}
public static SequenceNumber subtract(SequenceNumber a, int i)
{
return a.clone().add(-i);
}
private SequenceNumber add(int i)
{
_seqNo+=i;
return this;
}
@Override
public boolean equals(Object o)
{
if (this == o)
{
return true;
}
if (o == null || getClass() != o.getClass())
{
return false;
}
SequenceNumber that = (SequenceNumber) o;
if (_seqNo != that._seqNo)
{
return false;
}
return true;
}
@Override
public int hashCode()
{
return _seqNo;
}
public int compareTo(SequenceNumber o)
{
return _seqNo - o._seqNo;
}
@Override
public SequenceNumber clone()
{
return new SequenceNumber(_seqNo);
}
@Override
public String toString()
{
return "SN{" + _seqNo + '}';
}
public int intValue()
{
return _seqNo;
}
}
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