/// <summary>
/// Constructs a BatchGraph wrapping the provided baseGraph, using the specified buffer size and expecting vertex ids of
/// the specified IdType. Supplying vertex ids which do not match this type will throw exceptions.
/// </summary>
/// <param name="graph">Graph to be wrapped</param>
/// <param name="type"> Type of vertex id expected. This information is used to optimize the vertex cache memory footprint.</param>
/// <param name="bufferSize">Defines the number of vertices and edges loaded before starting a new transaction. The larger this value,
/// the more memory is required but the faster the loading process.</param>
public BatchGraph(ITransactionalGraph graph, VertexIdType type, long bufferSize)
{
if (graph == null)
{
throw new ArgumentNullException(nameof(graph));
}
if (bufferSize <= 0)
{
throw new ArgumentException("bufferSize must be greater than zero");
}
_baseGraph = graph;
_bufferSize = bufferSize;
_vertexIdKey = null;
_edgeIdKey = null;
_cache = type.GetVertexCache();
_remainingBufferSize = _bufferSize;
}
public static IVertexCache GetVertexCache(this VertexIdType vertexIdType)
{
switch (vertexIdType)
{
case VertexIdType.Object:
return(new ObjectIdVertexCache());
case VertexIdType.Number:
return(new LongIdVertexCache());
case VertexIdType.String:
return(new StringIdVertexCache());
case VertexIdType.Url:
return(new StringIdVertexCache(new UrlCompression()));
default:
throw new ArgumentException(string.Concat("Unrecognized ID type: ", vertexIdType));
}
}
