public SequentialDataTransform(IHost host, SequentialTransformerBase <TInput, TOutput, TState> parent, IDataView input, IRowMapper mapper)
: base(parent.Host, input)
{
_parent = parent;
_transform = CreateLambdaTransform(_parent.Host, input, _parent.InputColumnName,
_parent.OutputColumnName, InitFunction, _parent.WindowSize > 0, _parent.OutputColumnType);
_mapper = mapper;
_bindings = new ColumnBindings(Schema.Create(input.Schema), _mapper.GetOutputColumns());
}
public void InitState(SequentialTransformerBase <TInput, TOutput, TState> parentTransform, IHost host)
{
Contracts.CheckValue(host, nameof(host), "The host cannot be null.");
host.CheckValue(parentTransform, nameof(parentTransform));
Host = host;
ParentTransform = parentTransform;
RowCounter = 0;
InitializeStateCore(true);
PreviousPosition = -1;
}
/// <summary>
/// This method sets the window size and initializes the buffer only once.
/// Since the class needs to implement a default constructor, this methods provides a mechanism to initialize the window size and buffer.
/// </summary>
/// <param name="windowSize">The size of the windowed buffer</param>
/// <param name="initialWindowSize">The size of the windowed initial buffer used for training</param>
/// <param name="parentTransform">The parent transform of this state object</param>
/// <param name="host">The host</param>
public void InitState(int windowSize, int initialWindowSize, SequentialTransformerBase <TInput, TOutput, TState> parentTransform,
IHost host)
{
Contracts.CheckValue(host, nameof(host), "The host cannot be null.");
host.CheckValue(parentTransform, nameof(parentTransform));
host.CheckParam(windowSize >= 0, nameof(windowSize), "Must be non-negative.");
host.CheckParam(initialWindowSize >= 0, nameof(initialWindowSize), "Must be non-negative.");
Host = host;
WindowSize = windowSize;
InitialWindowSize = initialWindowSize;
ParentTransform = parentTransform;
WindowedBuffer = (WindowSize > 0) ? new FixedSizeQueue <TInput>(WindowSize) : new FixedSizeQueue <TInput>(1);
InitialWindowedBuffer = (InitialWindowSize > 0) ? new FixedSizeQueue <TInput>(InitialWindowSize) : new FixedSizeQueue <TInput>(1);
RowCounter = 0;
InitializeStateCore();
PreviousPosition = -1;
}