/// <summary>
/// Validates the population metadata properties.
/// </summary>
/// <param name="populationMetadata">The population metadata to validate.</param>
private static void ValidatePopulationProperties(IPopulationMetadata populationMetadata)
{
if (populationMetadata.SurvivalRate < 0 || populationMetadata.SurvivalRate > 1)
{
throw new ArgumentException("Error! Survival rate must be a value between 0 and 1.");
}
if (populationMetadata.DistanceThreshold < 0)
{
throw new ArgumentException("Error! Distance threshold must be a positive value.");
}
}
/// <summary>
/// Performs semantic validation on the given <see cref="IPopulationMetadata"/>.
/// </summary>
/// <param name="populationMetadata">The given <see cref="IPopulationMetadata"/>.</param>
internal static void Validate(IPopulationMetadata populationMetadata)
{
var seen = InitializeSeenTracker(populationMetadata);
ValidatePopulationProperties(populationMetadata);
foreach (var chromosomeMetadata in populationMetadata)
{
seen(chromosomeMetadata.Name);
ValidateChromosomeProperties(chromosomeMetadata);
}
}
/// <summary>
/// Constructs a new instance of the <see cref="Population"/> class.
/// </summary>
/// <param name="populationMetadata">The population metadata.</param>
internal Population(IPopulationMetadata populationMetadata)
{
_populationMetadata = populationMetadata;
if (_populationMetadata.CooperativeCoevolution)
{
_species = new Species[_populationMetadata.Count()];
for (var i = 0; i < _populationMetadata.Count(); i++)
{
_species[i] = new Species(this, _populationMetadata[i].Name);
}
}
else
{
_species = new Species[1];
_species[0] = new Species(this);
}
_optimalSpecies = _species[0];
}
/// <summary>
/// Initializes the seen tracker.
/// </summary>
/// <param name="populationMetadata">The population metadata to initialize against.</param>
/// <returns>The seen tracker.</returns>
private static Action <string> InitializeSeenTracker(IPopulationMetadata populationMetadata)
{
var seen = new Dictionary <string, bool>();
foreach (var chromosomeMetadata in populationMetadata)
{
seen[chromosomeMetadata.Name] = false;
}
return(name =>
{
if (seen[name])
{
throw new ArgumentException("Error! Every chromosome must have a unique name.");
}
else
{
seen[name] = true;
}
});
}
/// <summary>
/// Creates a population object.
/// </summary>
/// <param name="metadata">The population metadata.</param>
/// <returns>The constructed population.</returns>
public IPopulation CreatePopulation(IPopulationMetadata metadata)
{
SemanticValidator.Validate(metadata);
return(new Population(metadata) as IPopulation);
}
