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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.transport;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.ListIterator;
import static org.apache.qpid.util.Serial.lt;
public class RangeSetImpl implements RangeSet
{
private List<Range> ranges;
public RangeSetImpl()
{
ranges = new ArrayList<Range>();
}
public RangeSetImpl(int size)
{
ranges = new ArrayList<Range>(size);
}
public RangeSetImpl(org.apache.qpid.transport.RangeSetImpl copy)
{
ranges = new ArrayList<Range>(copy.ranges);
}
public int size()
{
return ranges.size();
}
public Iterator<Range> iterator()
{
return ranges.iterator();
}
public Range getFirst()
{
return ranges.get(0);
}
public Range getLast()
{
return ranges.get(ranges.size() - 1);
}
public boolean includes(Range range)
{
for (Range r : this)
{
if (r.includes(range))
{
return true;
}
}
return false;
}
public boolean includes(int n)
{
for (Range r : this)
{
if (r.includes(n))
{
return true;
}
}
return false;
}
public void add(Range range)
{
ListIterator<Range> it = ranges.listIterator();
while (it.hasNext())
{
Range next = it.next();
if (range.touches(next))
{
it.remove();
range = range.span(next);
}
else if (lt(range.getUpper(), next.getLower()))
{
it.previous();
it.add(range);
return;
}
}
it.add(range);
}
public void add(int lower, int upper)
{
switch(ranges.size())
{
case 0:
ranges.add(Range.newInstance(lower, upper));
break;
case 1:
Range first = ranges.get(0);
if(first.getUpper() + 1 >= lower && upper >= first.getUpper())
{
ranges.set(0, Range.newInstance(first.getLower(), upper));
break;
}
default:
add(Range.newInstance(lower, upper));
}
}
public void add(int value)
{
add(value, value);
}
public void clear()
{
ranges.clear();
}
public RangeSet copy()
{
return new org.apache.qpid.transport.RangeSetImpl(this);
}
public String toString()
{
StringBuffer str = new StringBuffer();
str.append("{");
boolean first = true;
for (Range range : ranges)
{
if (first)
{
first = false;
}
else
{
str.append(", ");
}
str.append(range);
}
str.append("}");
return str.toString();
}
}
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