/*
* Member Methods
*/
public override Dependency Simplify()
{
if (IsEmpty())
{
return(null);
}
AND newF = new AND();
IEnumerator e = GetDependencies();
while (e.MoveNext())
{
Dependency d = ((Dependency)e.Current).Simplify();
if (d is FalseDependency)
{
return((Dependency)e.Current);
}
else if (d.IsFormula())
{
Formula df = (Formula)d;
if (d is AND)
{
// collapse nested AND formulas into each other
IEnumerator e2 = df.GetDependencies();
while (e2.MoveNext())
{
newF.AddDependency((Dependency)e2.Current);
}
}
else if (d != null)
{
newF.AddDependency(d);
}
}
else if (!(d is TrueDependency))
{
// remove TrueDependencies from within an AND
newF.AddDependency((Dependency)e.Current);
}
}
if (newF.Count == 1)
{
return(newF[0]);
}
else if (newF.Count == 0)
{
return(null);
}
else
{
return(newF);
}
}
public override Dependency GetOppositeDependencies()
{
AND newF = new AND();
IEnumerator e = GetDependencies();
while (e.MoveNext())
{
newF.AddDependency(((Dependency)e.Current).GetOppositeDependencies());
}
return(newF);
}