/// <summary>
/// Validates the parameters:
/// * Null checks for every one of them.
/// * Checks that the number of training instances provided is sufficient considering the given configuration.
/// * Checks that configuration about whether to use run time tuning
/// and the usage of the run time tuning result interface fit together
/// * Checks that the parameter tree contains parameters.
/// * Checks that those parameters' identifiers are unique.
/// </summary>
/// <param name="targetAlgorithmFactory">
/// Produces configured instances of the target algorithm to tune.
/// </param>
/// <param name="runEvaluator">
/// Object for evaluating target algorithm runs.
/// </param>
/// <param name="trainingInstances">
/// The set of instances used for tuning.
/// </param>
/// <param name="parameterTree">
/// The parameter tree.
/// </param>
/// <param name="configuration">
/// Algorithm tuner configuration parameters.
/// </param>
/// <param name="genomeBuilder">
/// The genome builder.
/// </param>
private static void ValidateParameters(
ITargetAlgorithmFactory <TTargetAlgorithm, TInstance, TResult> targetAlgorithmFactory,
IRunEvaluator <TResult> runEvaluator,
IEnumerable <TInstance> trainingInstances,
ParameterTree parameterTree,
AlgorithmTunerConfiguration configuration,
GenomeBuilder genomeBuilder)
{
// Check argument for nulls.
if (targetAlgorithmFactory == null)
{
throw new ArgumentNullException(nameof(targetAlgorithmFactory), "You must specify a target algorithm factory.");
}
if (runEvaluator == null)
{
throw new ArgumentNullException(nameof(runEvaluator), "You must specify a run evaluator.");
}
if (trainingInstances == null)
{
throw new ArgumentNullException(nameof(trainingInstances), "You must specify a list of training instances.");
}
if (parameterTree == null)
{
throw new ArgumentNullException(nameof(parameterTree), "You must specify a parameter tree.");
}
if (configuration == null)
{
throw new ArgumentNullException(nameof(configuration), "You must specify an algorithm tuner configuration.");
}
if (genomeBuilder == null)
{
throw new ArgumentNullException(nameof(genomeBuilder), "You must specify a genome builder.");
}
// Check enough training instances have been provided.
var numInstances = trainingInstances.Count();
if (numInstances < configuration.EndNumInstances)
{
throw new ArgumentException(
$"In the end, {configuration.EndNumInstances} training instances should be used, but only {numInstances} have been provided.",
nameof(trainingInstances));
}
// Check that the parameter tree is valid.
if (!parameterTree.ContainsParameters())
{
throw new ArgumentException("Specified parameter tree without parameters.", nameof(parameterTree));
}
if (!parameterTree.IdentifiersAreUnique())
{
throw new ArgumentException("Specified parameter tree contained duplicate identifiers.", nameof(parameterTree));
}
}
public void ContainsParametersReturnsTrueForTreeContainingParameters()
{
// Build tree containing a node representing a parameter.
var root = new AndNode();
root.AddChild(new ValueNode <int>("parameter", new IntegerDomain()));
var tree = new ParameterTree(root);
// Check that it is recognized as having parameters.
Assert.True(
tree.ContainsParameters(),
"Parameter tree was wrongly identified as not containing parameters.");
}
public void ContainsParametersReturnsFalseForTreeConsistingOfAndNodes()
{
// Build tree consisting of two AND nodes.
var root = new AndNode();
root.AddChild(new AndNode());
var tree = new ParameterTree(root);
// Check that it is recognized as having no parameters.
Assert.False(
tree.ContainsParameters(),
"Parameter tree was wrongly identified as containing parameters.");
}