private void InitializeLocked()
{
if (!initialized)
{
DoInitialization();
initialized = true;
current = null;
vectorizerCount = GetVectorizers().Count();
}
}
internal OptimizationResultUpdatedEventArgs(OptimizationEpoch epoch, double mse, FeatureMatrix featureMatrix, Matrix<double> output)
{
Contract.Requires(epoch != null);
Contract.Requires(mse >= 0.0);
Contract.Requires(featureMatrix != null);
Contract.Requires(output != null);
Epoch = epoch;
MSE = mse;
FeatureMatrix = featureMatrix;
ComputedOutputMatrix = output;
}
internal void Update(double mse, FeatureMatrix featureMatrix, Matrix<double> output)
{
Contract.Requires(mse >= 0.0);
Contract.Requires(featureMatrix != null);
Contract.Requires(output != null);
lock (SyncRoot)
{
if (bestHolder && mse >= this.mse) return;
this.mse = mse;
var handler = Updated;
if (handler != null) handler(this, new OptimizationResultUpdatedEventArgs(Epoch, mse, featureMatrix, output));
}
}
public void Uninitialize()
{
if (initialized)
{
lock (SyncRoot)
{
if (initialized)
{
DoUninitialization();
initialized = false;
current = null;
}
}
}
}
public FeatureMatrix GetNext()
{
lock (SyncRoot)
{
// Ensure initialization
InitializeLocked();
var nextIndexes = selectionStrategy.GetNextIndexes();
if (nextIndexes == null || nextIndexes.Value.IsEmpty)
{
if (current == null)
{
throw new InvalidOperationException(selectionStrategy + " has returned no indexes.");
}
return current;
}
else
{
return current = GetFeatureMatrixInternal(nextIndexes.Value);
}
}
}
