/// <summary>
/// Generate a hypotheses from a file.
/// </summary>
///
/// <param name="hypothesesFilePath">The file to read's path.</param>
///
/// <returns>
/// The created hypotheses object.
/// Null if the file can not be read of if an error occured during the file reading.
/// </returns>
static Hypotheses <string> GenerateHypothesesFromFile(string hypothesesFilePath)
{
try
{
string[] hypothesesFileLines = System.IO.File.ReadAllLines(hypothesesFilePath);
Hypotheses <string> hypotheses = new Hypotheses <string>();
foreach (string line in hypothesesFileLines)
{
string toAdd = line.TrimStart().TrimEnd();
if (toAdd[0] == '!')
{
hypotheses.ListeHypotheses.Add(
new Element <string>(toAdd.Substring(1), ElementStateEnum.PresentWithNegation));
}
else
{
hypotheses.ListeHypotheses.Add(
new Element <string>(toAdd, ElementStateEnum.PresentWithoutNegation));
}
}
return(!hypotheses.IsEmpty() ? hypotheses : null);
}
catch (Exception exception)
{
Console.WriteLine("Error during the hypotheses's file reading : " + exception.ToString());
return(null);
}
}
public bool Equals(Hypotheses <T> toTest)
{
if (this.ListeHypotheses.Count != toTest.ListeHypotheses.Count)
{
return(false);
}
for (int counter = 0; counter < ListeHypotheses.Count; counter++)
{
if (!ListeHypotheses[counter].Equals(toTest.ListeHypotheses[counter]))
{
return(false);
}
}
return(true);
}
/// <summary> (Constructor).
/// Solve the current system with the given hypotheses.
/// </summary>
///
/// <param name="hypotheses">Hypotheses used to solve the system.</param>
///
/// <returns>The system after the algorithm.</returns>
public Systeme <T> SolveWithHypotheses(Hypotheses <T> hypotheses)
{
Hypotheses <T> oldHypotheses;
List <Element <T> > hypothesesList = hypotheses.ListeHypotheses.ToList();
do
{
oldHypotheses = new Hypotheses <T>(hypotheses.ListeHypotheses.ToList());
foreach (Element <T> hypothese in hypothesesList)
{
if (hypothese.State != ElementStateEnum.Absent)
{
foreach (Equation <T> equation in Equations)
{
ElementEquation <T> premisse = equation.DoesPremissesContainsElement(hypothese);
if (premisse != null)
{
premisse.AlwaysTrue = true;
}
if (equation.ArePremissesTrue() && !hypotheses.Contains(equation.Conclusion))
{
hypotheses.AddHypothese(equation.Conclusion);
}
}
}
}
hypothesesList = hypotheses.ListeHypotheses.ToList();
} while (!hypotheses.Equals(oldHypotheses));
return(this);
}