/// <summary>
/// Deserializes a huge collection index from the given stream.
/// </summary>
/// <param name="stream">The source stream.</param>
/// <param name="copy">The copy flag. When true all data is copied into memory, otherwise the source-stream is used as a memorymapped file.</param>
/// <returns></returns>
public static HugeCoordinateCollectionIndex Deserialize(Stream stream, bool copy = false)
{
// read sizes.
long position = 0;
var longBytes = new byte[8];
stream.Read(longBytes, 0, 8);
position = position + 8;
var indexLength = BitConverter.ToInt64(longBytes, 0);
stream.Read(longBytes, 0, 8);
position = position + 8;
var coordinateLength = BitConverter.ToInt64(longBytes, 0);
var file = new MemoryMappedStream(new LimitedStream(stream));
var indexArray = new MemoryMappedHugeArrayUInt64(file, indexLength, indexLength, 1024);
var coordinateArray = new MemoryMappedHugeArraySingle(file, coordinateLength * 2, coordinateLength * 2, 1024);
if (copy)
{ // copy the data.
var indexArrayCopy = new HugeArray <ulong>(indexLength);
indexArrayCopy.CopyFrom(indexArray);
var coordinateArrayCopy = new HugeArray <float>(coordinateLength * 2);
coordinateArrayCopy.CopyFrom(coordinateArray);
file.Dispose();
return(new HugeCoordinateCollectionIndex(indexLength, indexArrayCopy, coordinateArrayCopy));
}
return(new HugeCoordinateCollectionIndex(indexLength, indexArray, coordinateArray));
}
/// <summary>
/// Serializes this huge collection index to the given stream.
/// </summary>
/// <param name="stream"></param>
public long Serialize(Stream stream)
{
// first trim to minimize the amount of useless data store.
this.Trim();
// start writing.
long indexSize = _index.Length;
long coordinatesCount = _coordinates.Length;
long position = 0;
stream.Write(BitConverter.GetBytes(indexSize), 0, 8); // write the actual index size.
position = position + 8;
stream.Write(BitConverter.GetBytes(coordinatesCount), 0, 8); // write the actual number of coordinates.
position = position + 8;
// write in this order: index, shapes.
using (var file = new MemoryMappedStream(new LimitedStream(stream)))
{
// write index.
var indexArray = new MemoryMappedHugeArrayUInt64(file, indexSize, indexSize, 1024);
indexArray.CopyFrom(_index, indexSize);
indexArray.Dispose();
position = position + (indexSize * 8);
// write coordinates.
var coordinatesArray = new MemoryMappedHugeArraySingle(file, coordinatesCount * 2, coordinatesCount * 2, 1024);
coordinatesArray.CopyFrom(_coordinates);
coordinatesArray.Dispose();
position = position + (coordinatesCount * 2 * 4);
}
return(position);
}
/// <summary>
/// Serializes this huge collection index to the given stream.
/// </summary>
/// <param name="stream"></param>
public long Serialize(Stream stream)
{
// first trim to minimize the amount of useless data store.
this.Trim();
// start writing.
long indexSize = _index.Length;
long coordinatesCount = _coordinates.Length;
long position = 0;
stream.Write(BitConverter.GetBytes(indexSize), 0, 8); // write the actual index size.
position = position + 8;
stream.Write(BitConverter.GetBytes(coordinatesCount), 0, 8); // write the actual number of coordinates.
position = position + 8;
// write in this order: index, shapes.
using (var file = new MemoryMappedStream(new LimitedStream(stream)))
{
// write index.
var indexArray = new MemoryMappedHugeArrayUInt64(file, indexSize, indexSize, 1024);
indexArray.CopyFrom(_index, indexSize);
indexArray.Dispose();
position = position + (indexSize * 8);
// write coordinates.
var coordinatesArray = new MemoryMappedHugeArraySingle(file, coordinatesCount * 2, coordinatesCount * 2, 1024);
coordinatesArray.CopyFrom(_coordinates);
coordinatesArray.Dispose();
position = position + (coordinatesCount * 2 * 4);
}
return position;
}
/// <summary>
/// Deserializes a huge collection index from the given stream.
/// </summary>
/// <param name="stream">The source stream.</param>
/// <param name="copy">The copy flag. When true all data is copied into memory, otherwise the source-stream is used as a memorymapped file.</param>
/// <returns></returns>
public static HugeCoordinateCollectionIndex Deserialize(Stream stream, bool copy = false)
{
// read sizes.
long position = 0;
var longBytes = new byte[8];
stream.Read(longBytes, 0, 8);
position = position + 8;
var indexLength = BitConverter.ToInt64(longBytes, 0);
stream.Read(longBytes, 0, 8);
position = position + 8;
var coordinateLength = BitConverter.ToInt64(longBytes, 0);
var file = new MemoryMappedStream(new LimitedStream(stream));
var indexArray = new MemoryMappedHugeArrayUInt64(file, indexLength, indexLength, 1024);
var coordinateArray = new MemoryMappedHugeArraySingle(file, coordinateLength * 2, coordinateLength * 2, 1024);
if (copy)
{ // copy the data.
var indexArrayCopy = new HugeArray<ulong>(indexLength);
indexArrayCopy.CopyFrom(indexArray);
var coordinateArrayCopy = new HugeArray<float>(coordinateLength * 2);
coordinateArrayCopy.CopyFrom(coordinateArray);
file.Dispose();
return new HugeCoordinateCollectionIndex(indexLength, indexArrayCopy, coordinateArrayCopy);
}
return new HugeCoordinateCollectionIndex(indexLength, indexArray, coordinateArray);
}
