/// <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>
/// Deserializes a graph from the given stream.
/// </summary>
/// <param name="stream">The stream to read from. Reading will start at position 0.</param>
/// <param name="edgeDataSize">The edge data size.</param>
/// <param name="mapFrom">The map from for the edge data.</param>
/// <param name="mapTo">The map to for the edge data.</param>
/// <param name="copy">Flag to make an in-memory copy.</param>
/// <returns></returns>
public new static DirectedGraph <TEdgeData> Deserialize(System.IO.Stream stream, int edgeDataSize, MappedHugeArray <TEdgeData, uint> .MapFrom mapFrom,
MappedHugeArray <TEdgeData, uint> .MapTo mapTo, bool copy)
{
// read sizes.
long position = 0;
stream.Seek(4, System.IO.SeekOrigin.Begin);
position = position + 4;
var longBytes = new byte[8];
stream.Read(longBytes, 0, 8);
position = position + 8;
var vertexLength = BitConverter.ToInt64(longBytes, 0);
stream.Read(longBytes, 0, 8);
position = position + 8;
var edgeLength = BitConverter.ToInt64(longBytes, 0);
var bufferSize = 32;
var cacheSize = MemoryMappedHugeArrayUInt32.DefaultCacheSize;
var file = new MemoryMappedStream(new OsmSharp.IO.LimitedStream(stream));
var vertexArray = new MemoryMappedHugeArrayUInt32(file, (vertexLength + 1) * VERTEX_SIZE, (vertexLength + 1) * VERTEX_SIZE, bufferSize / 4, cacheSize * 4);
position = position + ((vertexLength + 1) * VERTEX_SIZE * 4);
var vertexCoordinateArray = new MappedHugeArray <GeoCoordinateSimple, float>(
new MemoryMappedHugeArraySingle(file, (vertexLength + 1) * 2, (vertexLength + 1) * 2, bufferSize / 4, cacheSize * 4),
2, (array, idx, coordinate) =>
{
array[idx] = coordinate.Latitude;
array[idx + 1] = coordinate.Longitude;
},
(Array, idx) =>
{
return(new GeoCoordinateSimple()
{
Latitude = Array[idx],
Longitude = Array[idx + 1]
});
});
position = position + ((vertexLength + 1) * 2 * 4);
var edgeArray = new MemoryMappedHugeArrayUInt32(file, edgeLength * EDGE_SIZE, edgeLength * EDGE_SIZE, bufferSize / 2, cacheSize * 4);
position = position + (edgeLength * EDGE_SIZE * 4);
var edgeDataArray = new MappedHugeArray <TEdgeData, uint>(
new MemoryMappedHugeArrayUInt32(file, edgeLength * edgeDataSize, edgeLength * edgeDataSize, bufferSize * 2, cacheSize * 2), edgeDataSize, mapTo, mapFrom);
position = position + (edgeLength * edgeDataSize * 4);
// deserialize shapes.
stream.Seek(position, System.IO.SeekOrigin.Begin);
var cappedStream = new OsmSharp.IO.LimitedStream(stream);
var shapes = HugeCoordinateCollectionIndex.Deserialize(cappedStream, copy);
if (copy)
{ // copy the data.
var vertexArrayCopy = new HugeArray <uint>(vertexArray.Length);
vertexArrayCopy.CopyFrom(vertexArray);
var vertexCoordinateArrayCopy = new HugeArray <GeoCoordinateSimple>(vertexCoordinateArray.Length);
vertexCoordinateArrayCopy.CopyFrom(vertexCoordinateArray);
var edgeArrayCopy = new HugeArray <uint>(edgeArray.Length);
edgeArrayCopy.CopyFrom(edgeArray);
var edgeDataArrayCopy = new HugeArray <TEdgeData>(edgeDataArray.Length);
edgeDataArrayCopy.CopyFrom(edgeDataArray);
file.Dispose();
return(new DirectedGraph <TEdgeData>(vertexCoordinateArrayCopy, vertexArrayCopy, edgeArrayCopy, edgeDataArrayCopy, shapes));
}
return(new DirectedGraph <TEdgeData>(vertexCoordinateArray, vertexArray, edgeArray, edgeDataArray, shapes));
}
/// <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);
}
