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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;
using System.Collections.Generic;
using org.apache.qpid.transport.util;
namespace org.apache.qpid.transport
{
/// <summary>
/// Range
/// </summary>
public sealed class Range
{
private int _lower;
private int _upper;
public Range(int lower, int upper)
{
_lower = lower;
_upper = upper;
}
public int Lower
{
get { return _lower; }
set { _lower = value; }
}
public int Upper
{
get { return _upper; }
set { _upper = value; }
}
public bool Includes(int value)
{
return Serial.Le(_lower, value) && Serial.Le(value, _upper);
}
public bool Includes(Range range)
{
return Includes(range._lower) && Includes(range._upper);
}
public bool Intersects(Range range)
{
return (Includes(range._lower) || Includes(range._upper) ||
range.Includes(_lower) || range.Includes(_upper));
}
public bool Touches(Range range)
{
return (Intersects(range) ||
Includes(range._upper + 1) || Includes(range._lower - 1) ||
range.Includes(_upper + 1) || range.Includes(_lower - 1));
}
public Range Span(Range range)
{
return new Range(Serial.Min(_lower, range._lower), Serial.Max(_upper, range._upper));
}
public List<Range> Subtract(Range range)
{
List<Range> result = new List<Range>();
if (Includes(range._lower) && Serial.Le(_lower, range._lower - 1))
{
result.Add(new Range(_lower, range._lower - 1));
}
if (Includes(range._upper) && Serial.Le(range._upper + 1, _upper))
{
result.Add(new Range(range._upper + 1, _upper));
}
if (result.Count == 0 && !range.Includes(this))
{
result.Add(this);
}
return result;
}
public Range Intersect(Range range)
{
int l = Serial.Max(_lower, range._lower);
int r = Serial.Min(_upper, range._upper);
return Serial.Gt(l, r) ? null : new Range(l, r);
}
public override String ToString()
{
return "[" + _lower + ", " + _upper + "]";
}
}
}
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