/// <summary>
/// Set differences a passed-in CustomSet with the current CustomSet.
/// </summary>
/// <param name="s">A CustomSet.</param>
/// <returns>A new CustomSet whose elements are the set difference of <b>s</b> and <b>this</b>.</returns>
/// <remarks><b>s</b> and <b>this</b> must be "similar" CustomSets.</remarks>
public virtual CustomSet Difference(CustomSet s)
{
if (!AreSimilar(s))
{
throw new ArgumentException("Attempting to apply set difference to two dissimilar sets. Set difference can only occur between two sets with the same universe.");
}
// do a bit-wise XOR and then an AND to achieve set difference
CustomSet result = (CustomSet)Clone();
result.data.Xor(s.data).And(this.data);
return(result);
}
/// <summary>
/// Intersects a passed-in CustomSet with the current CustomSet.
/// </summary>
/// <param name="s">A CustomSet.</param>
/// <returns>A new CustomSet whose elements are the intersection of <b>s</b> and <b>this</b>.</returns>
/// <remarks><b>s</b> and <b>this</b> must be "similar" CustomSets.</remarks>
public virtual CustomSet Intersection(CustomSet s)
{
if (!AreSimilar(s))
{
throw new ArgumentException("Attempting to intersect two dissimilar sets. Intersection can only occur between two sets with the same universe.");
}
// do a bit-wise AND to intersect this.data and s.data
CustomSet result = (CustomSet)Clone();
result.data.And(s.data);
return(result);
}
/// <summary>
/// Intersects a set of integers with the current CustomSet.
/// </summary>
/// <param name="list">An variable number of integers.</param>
/// <returns>A new CustomSet, which is the intersection of the <b>this</b> CustomSet and the passed-in integers.</returns>
public virtual CustomSet Intersection(params int[] list)
{
CustomSet result = new CustomSet(this.lowerBound, this.upperBound);
for (int i = 0; i < list.Length; i++)
{
// only add the element to result if its in this.data
int val = list[i];
if (val >= this.lowerBound && val <= this.upperBound)
{
if (this.data.Get(val - this.lowerBound))
{
result.data.Set(val - this.lowerBound, true);
}
}
}
return(result);
}
/// <summary>
/// Unions a set of integers with the current CustomSet.
/// </summary>
/// <param name="list">An variable number of integers.</param>
/// <returns>A new CustomSet, which is the union of the <b>this</b> CustomSet and the passed-in integers.</returns>
public virtual CustomSet Union(params int[] list)
{
// create a deep copy of this
CustomSet result = (CustomSet)Clone();
// For each integer passed in, if it's within the bounds add it to the results's BitArray.
for (int i = 0; i < list.Length; i++)
{
int val = list[i];
if (val >= this.lowerBound && val <= this.upperBound)
{
result.data.Set(val - this.lowerBound, true);
}
else
{
throw new ArgumentException("Attempting to add an element with value " + val.ToString() + " that is outside of the set's universe. Value must be between " + this.lowerBound.ToString() + " and " + this.upperBound.ToString());
}
}
return(result); // return the new CustomSet
}
/// <summary>
/// Determins if this set is a proper superset of the integers passed-in.
/// </summary>
/// <param name="list">A variable number of integers.</param>
/// <returns><b>True</b> if <b>this</b> is a proper superset of the passed-in integers; <b>False</b> otherwise.</returns>
public virtual bool ProperSuperset(params int[] list)
{
CustomSet temp = new CustomSet(this.lowerBound, this.upperBound, list);
return(ProperSuperset(temp));
}
/// <summary>
/// Set differences a set of integers with the current CustomSet.
/// </summary>
/// <param name="list">An variable number of integers.</param>
/// <returns>A new CustomSet, which is the set difference of the <b>this</b> CustomSet and the passed-in integers.</returns>
public virtual CustomSet Difference(params int[] list)
{
CustomSet result = new CustomSet(this.lowerBound, this.upperBound, list);
return(Difference(result));
}
/// <summary>
/// Determines if two CustomSets are "compatible." Specifically, it checks to ensure that the CustomSets
/// share the same lower and upper bounds.
/// </summary>
/// <param name="s">The custom set to compare.</param>
/// <returns><b>True</b> if the CustomSets share the same bounds, <b>False</b> otherwise.</returns>
protected virtual bool AreSimilar(CustomSet s)
{
return(this.lowerBound == s.lowerBound && this.upperBound == s.upperBound);
}
