/// <summary>
/// Initialise a new instance of the GeneticEngine class with the supplied plug-ins and populate the initial generation.
/// </summary>
/// <param name="populator">The populator plug-in. Generates the initial population.</param>
/// <param name="evaluator">The evaluator plug-in. Provides the fitness function.</param>
/// <param name="geneticOperator">The genetic operator plug-in. Processes one generation to produce the individuals for the next.</param>
/// <param name="terminator">The terminator plug-in. Provides the termination condition.</param>
/// <param name="outputter">The outputter plug-in or null for no output. Outputs each generation.</param>
/// <param name="generationFactory">The generation factory plug-in or null to use the default. Creates the generation container.</param>
public GeneticEngine(IPopulator populator, IEvaluator evaluator, IGeneticOperator geneticOperator, ITerminator terminator, IOutputter outputter = null, IGenerationFactory generationFactory = null)
{
if (populator == null)
{
throw new GeneticEngineException("populator must not be null");
}
if (evaluator == null)
{
throw new GeneticEngineException("pvaluator must not be null");
}
if (geneticOperator == null)
{
throw new GeneticEngineException("geneticOperator must not be null");
}
if (terminator == null)
{
throw new GeneticEngineException("terminator must not be null");
}
this.populator = populator;
this.evaluator = evaluator;
this.geneticOperator = geneticOperator;
this.terminator = terminator;
this.outputter = outputter;
this.generationFactory = generationFactory == null ? new AATreeGenerationFactory() : generationFactory;
Setup();
}
/// <summary>
///Check if the plugins have been selected by the user, if not the revelant exceptions are thrown
///asking the user to make a choice.
///So, if the populator,evaluators, geneticOperator and terminator choices are not chosen, then
///error messages are displayed to alert the user, that the choices for these four plugins cannot be null.
///If the plugins are chosen, the engine object is created according to the user choices and it is initialised.
///Once the engine is initialised, the rest of the buttons on the interface are activated and the fitness values
///are displayed.
/// </summary>
private void initEngineButton_Click(object sender, EventArgs e)
{
if (!engineRunning)
{
SetEngineRunning(true);
populator = null;
evaluator = null;
geneticOperator = null;
terminator = null;
outputter = null;
generationFactory = null;
string errorMsg = "";
if (cbPopulator.SelectedItem == null) errorMsg += "Populator must not be null\n";
else
{
string choice = getChoice(populators, cbPopulator);
try
{
populator = (IPopulator)loader.GetInstance(choice, (object)tbMapFile.Text);
}
catch (GeneticEngineException exception)
{
MessageBox.Show(exception.Message);
}
}
if (cbEvaluator.SelectedItem == null) errorMsg += "Evaluator must not be null\n";
else
{
string choice = getChoice(evaluators, cbEvaluator);
try
{
evaluator = (IEvaluator)loader.GetInstance(choice, null);
}
catch (GeneticEngineException exception)
{
MessageBox.Show(exception.Message);
}
}
if (cbGeneticOperator.SelectedItem == null) errorMsg += "Genetic Operator must not be null\n";
else
{
string choice = getChoice(geneticOperators, cbGeneticOperator);
try
{
geneticOperator = (IGeneticOperator)loader.GetInstance(choice, null);
}
catch (GeneticEngineException exception)
{
MessageBox.Show(exception.Message);
}
}
if (cbTerminator.SelectedItem == null) errorMsg += "Terminator must not be null\n";
else
{
string choice = getChoice(terminators, cbTerminator);
if ((int)targetFitness.Value == 0) errorMsg += "Provide a target fitness value greater than 1 for the terminator plug-in\n";
else
{
try
{
terminator = (ITerminator)loader.GetInstance(choice, (object)(uint)targetFitness.Value);
}
catch (GeneticEngineException exception)
{
MessageBox.Show(exception.Message);
}
}
}
if (cbOutputter.SelectedItem != null)
{
string choice = getChoice(outputters, cbOutputter);
if (choice != noOutputterString)
{
if (tbOutputFile.Text == "")
{
MessageBox.Show("Select an output file for the outputter\n");
}
else
{
outputter = (IOutputter)loader.GetInstance(choice, (object)tbOutputFile.Text);
}
}
}
if (cbGenerationFactory.SelectedItem != null)
{
string choice = getChoice(generationFactories, cbGenerationFactory);
if (choice != defaultGenerationFactoryString)
{
generationFactory = (IGenerationFactory)loader.GetInstance(choice, null);
}
}
if (errorMsg != "") MessageBox.Show(errorMsg + "Please make sure you have selected a populator, evaluator, genetic operator and terminator and then try pressing the button again\n");
else
{
try
{
displayOutputter = new DisplayOutputter(this, outputter);
engine = new GeneticEngine(populator, evaluator, geneticOperator, terminator, displayOutputter, generationFactory);
hasInitialised = true;
}
catch (GeneticEngineException ex)
{
MessageBox.Show(ex.Message);
}
}
SetEngineRunning(false);
}
}