/// <summary>
/// Constructor.
/// </summary>
/// <param name="env">environment like ConsoleEnvironment</param>
/// <param name="transform">transform to convert</param>
/// <param name="sourceToReplace">source to replace</param>
/// <param name="conc">number of concurrency threads</param>
public ValueMapperFromTransform(IHostEnvironment env, IDataTransform transform,
IDataView sourceToReplace = null, int conc = 1)
{
Contracts.AssertValue(env);
Contracts.AssertValue(transform);
_env = env;
_transform = transform;
_sourceToReplace = sourceToReplace;
_disposeEnv = conc > 0;
_computeEnv = _disposeEnv ? new PassThroughEnvironment(env, conc: conc, verbose: false) : env;
_valueMapperDispose = GetMapperDispose();
}
public void Dispose()
{
if (_disposeEnv)
{
(_computeEnv as PassThroughEnvironment).Dispose();
_computeEnv = null;
}
if (_valueMapperDispose != null)
{
_valueMapperDispose.Dispose();
_valueMapperDispose = null;
}
}