public Expression Parse(string Context)
{
List<string> parts = new List<string>(Context.Split(' '));
if (parts.Count < 3)
{
return new ValueExpression(Context);
}
Expression firstExpression = new ValueExpression(parts[0]);
parts.RemoveAt(0);
return GetNextExpression(parts, firstExpression);
}
private Expression GetNextExpression(List<string> Parts, Expression FirstExpression)
{
if (Parts.Count < 2)
{
return FirstExpression;
}
Expression secondExpression = new ValueExpression(Parts[1]);
string part = Parts[0];
Parts.RemoveAt(0);
Parts.RemoveAt(0);
if (part.ToUpper().Equals("OR"))
{
return new OrExpression(FirstExpression, GetNextExpression(Parts, secondExpression));
}
else
{
return new AndExpression(FirstExpression, GetNextExpression(Parts, secondExpression));
}
}