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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 Apache.Qpid.Buffer
{
internal sealed class SlicedByteBuffer : ByteBuffer
{
private ByteBuffer _buffer;
private int _capacity;
private int _startPos;
public override int Capacity
{
get { return _capacity; }
}
public override byte[] Array
{
get { return _buffer.Array; }
}
/// <summary>
/// Initialize a new instance
/// </summary>
/// <param name="buffer">Underlying byte buffer</param>
internal SlicedByteBuffer(ByteBuffer buffer)
{
_buffer = buffer;
_startPos = buffer.Position;
Position = 0;
_capacity = buffer.Remaining;
Limit = Capacity;
// cannot autoexpand
IsAutoExpand = false;
}
protected override void DoWrite(int position, byte value)
{
_buffer.Put(_startPos + position, value);
}
protected override void DoWrite(int position, byte[] src, int offset, int length)
{
_buffer.Put(_startPos + position, src, offset, length);
}
protected override byte DoReadByte(int position)
{
return _buffer.GetByte(_startPos + position);
}
protected override void DoReadBytes(int position, byte[] dest, int offset, int length)
{
_buffer.GetBytes(_startPos + position, dest, offset, length);
}
protected override void DoCompact()
{
throw new NotSupportedException();
}
protected override void DoResize(int newSize)
{
throw new NotSupportedException();
}
} // class SlicedByteBuffer
}
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