/// <summary>
/// Creates a buffer of the specified length. Depending on the length, either a SingleChunkBuffer or a MultiChunkBuffer will be created.
/// </summary>
/// <param name="chunkSource">The chunk pool.</param>
/// <param name="minimumCapacity">The minimum capacity.</param>
/// <returns>A buffer with at least the minimum capacity.</returns>
public static IByteBuffer Create(IBsonChunkSource chunkSource, int minimumCapacity)
{
if (chunkSource == null)
{
throw new ArgumentNullException("chunkSource");
}
if (minimumCapacity <= 0)
{
throw new ArgumentOutOfRangeException("minimumCapacity");
}
var capacity = 0;
var chunks = new List <IBsonChunk>();
while (capacity < minimumCapacity)
{
var chunk = chunkSource.GetChunk(minimumCapacity - capacity);
chunks.Add(chunk);
capacity += chunk.Bytes.Count;
}
if (chunks.Count == 1)
{
return(new SingleChunkBuffer(chunks[0], 0, isReadOnly: false));
}
else
{
return(new MultiChunkBuffer(chunks, 0, isReadOnly: false));
}
}
public void constructor_with_chunkSource_should_throw_when_chunkSource_is_null()
{
IBsonChunkSource chunkSource = null;
Action action = () => new MultiChunkBuffer(chunkSource);
action.ShouldThrow <ArgumentNullException>().And.ParamName.Should().Be("chunkSource");
}
// constructors
/// <summary>
/// Initializes a new instance of the <see cref="MultiChunkBuffer"/> class.
/// </summary>
/// <param name="chunkSource">The chunk pool.</param>
/// <exception cref="System.ArgumentNullException">chunkPool</exception>
public MultiChunkBuffer(IBsonChunkSource chunkSource)
{
if (chunkSource == null)
{
throw new ArgumentNullException("chunkSource");
}
_chunks = new List<IBsonChunk>();
_chunkSource = chunkSource;
_length = 0;
_positions = new List<int> { 0 };
}
// constructors
/// <summary>
/// Initializes a new instance of the <see cref="MultiChunkBuffer"/> class.
/// </summary>
/// <param name="chunkSource">The chunk pool.</param>
/// <exception cref="System.ArgumentNullException">chunkPool</exception>
public MultiChunkBuffer(IBsonChunkSource chunkSource)
{
if (chunkSource == null)
{
throw new ArgumentNullException("chunkSource");
}
_chunks = new List <IBsonChunk>();
_chunkSource = chunkSource;
_length = 0;
_positions = new List <int> {
0
};
}
/// <summary>
/// Creates a buffer of the specified length. Depending on the length, either a SingleChunkBuffer or a MultiChunkBuffer will be created.
/// </summary>
/// <param name="chunkSource">The chunk pool.</param>
/// <param name="minimumCapacity">The minimum capacity.</param>
/// <returns>A buffer with at least the minimum capacity.</returns>
public static IByteBuffer Create(IBsonChunkSource chunkSource, int minimumCapacity)
{
if (chunkSource == null)
{
throw new ArgumentNullException("chunkSource");
}
if (minimumCapacity <= 0)
{
throw new ArgumentOutOfRangeException("minimumCapacity");
}
var capacity = 0;
var chunks = new List<IBsonChunk>();
while (capacity < minimumCapacity)
{
var chunk = chunkSource.GetChunk(minimumCapacity - capacity);
chunks.Add(chunk);
capacity += chunk.Bytes.Count;
}
if (chunks.Count == 1)
{
var chunk = chunks[0];
ByteArrayChunk byteArrayChunk;
if ((byteArrayChunk = chunk as ByteArrayChunk) != null)
{
var segment = byteArrayChunk.Bytes;
if (segment.Offset == 0)
{
return new ByteArrayBuffer(segment.Array, segment.Count, isReadOnly: false);
}
}
return new SingleChunkBuffer(chunk, 0, isReadOnly: false);
}
else
{
return new MultiChunkBuffer(chunks, 0, isReadOnly: false);
}
}
// constructors
/// <summary>
/// Initializes a new instance of the <see cref="OutputBufferChunkSource"/> class.
/// </summary>
/// <param name="baseSource">The chunk source.</param>
/// <param name="initialUnpooledChunkSize">The size of the initial unpooled chunk.</param>
/// <param name="minChunkSize">The minimum size of a chunk.</param>
/// <param name="maxChunkSize">The maximum size of a chunk.</param>
public OutputBufferChunkSource(
IBsonChunkSource baseSource,
int initialUnpooledChunkSize = DefaultInitialUnpooledChunkSize,
int minChunkSize = DefaultMinChunkSize,
int maxChunkSize = DefaultMaxChunkSize)
{
if (baseSource == null)
{
throw new ArgumentNullException("baseSource");
}
if (initialUnpooledChunkSize < 0)
{
throw new ArgumentOutOfRangeException("initialUnpooledChunkSize");
}
if (minChunkSize <= 0)
{
throw new ArgumentOutOfRangeException("minChunkSize");
}
if (maxChunkSize <= 0)
{
throw new ArgumentOutOfRangeException("maxChunkSize");
}
if (!PowerOf2.IsPowerOf2(minChunkSize))
{
throw new ArgumentException("minChunkSize is not a power of 2.", "minChunkSize");
}
if (!PowerOf2.IsPowerOf2(maxChunkSize))
{
throw new ArgumentException("maxChunkSize is not a power of 2.", "maxChunkSize");
}
if (maxChunkSize < minChunkSize)
{
throw new ArgumentException("maxChunkSize is less than minChunkSize", "maxChunkSize");
}
_baseSource = baseSource;
_initialUnpooledChunkSize = initialUnpooledChunkSize;
_minChunkSize = minChunkSize;
_maxChunkSize = maxChunkSize;
}
// constructors
/// <summary>
/// Initializes a new instance of the <see cref="InputBufferChunkSource"/> class.
/// </summary>
/// <param name="baseSource">The chunk source.</param>
/// <param name="maxUnpooledChunkSize">The maximum size of an unpooled chunk.</param>
/// <param name="minChunkSize">The minimum size of a chunk.</param>
/// <param name="maxChunkSize">The maximum size of a chunk.</param>
public InputBufferChunkSource(
IBsonChunkSource baseSource,
int maxUnpooledChunkSize = DefaultMaxUnpooledChunkSize,
int minChunkSize = DefaultMinChunkSize,
int maxChunkSize = DefaultMaxChunkSize)
{
if (baseSource == null)
{
throw new ArgumentNullException("baseSource");
}
if (maxUnpooledChunkSize < 0)
{
throw new ArgumentOutOfRangeException("maxUnpooledChunkSize");
}
if (minChunkSize <= 0)
{
throw new ArgumentOutOfRangeException("minChunkSize");
}
if (maxChunkSize <= 0)
{
throw new ArgumentOutOfRangeException("maxChunkSize");
}
if (!PowerOf2.IsPowerOf2(minChunkSize))
{
throw new ArgumentException("minChunkSize is not a power of 2.", "minChunkSize");
}
if (!PowerOf2.IsPowerOf2(maxChunkSize))
{
throw new ArgumentException("maxChunkSize is not a power of 2.", "maxChunkSize");
}
if (maxChunkSize < minChunkSize)
{
throw new ArgumentException("maxChunkSize is less than minChunkSize", "maxChunkSize");
}
_baseSource = baseSource;
_maxUnpooledChunkSize = maxUnpooledChunkSize;
_minChunkSize = minChunkSize;
_maxChunkSize = maxChunkSize;
}
