/**
* Creates a comparator that inverts the comparison
* of the given comparator. If you pass in <code>null</code>,
* the ReverseComparator defaults to reversing the
* natural order, as per
* {@link java.util.Collections#reverseOrder()}</b>.
*
* @param comparator Comparator to reverse
*/
public ReverseComparator(java.util.Comparator <Object> comparator)
{
if (comparator != null)
{
this.comparator = comparator;
}
else
{
this.comparator = ComparableComparator.getInstance();
}
}
/**
* Construct an instance that sorts <code>null</code> higher or lower than
* any non-<code>null</code> object it is compared with. When comparing
* two non-<code>null</code> objects, the {@link ComparableComparator} is
* used.
*
* @param nullsAreHigh a <code>true</code> value indicates that
* <code>null</code> should be compared as higher than a
* non-<code>null</code> object. A <code>false</code> value indicates
* that <code>null</code> should be compared as lower than a
* non-<code>null</code> object.
**/
public NullComparator(bool nullsAreHigh)
: this(ComparableComparator.getInstance(), nullsAreHigh)
{
}
//-----------------------------------------------------------------------
/**
* Construct an instance that sorts <code>null</code> higher than any
* non-<code>null</code> object it is compared with. When comparing two
* non-<code>null</code> objects, the {@link ComparableComparator} is
* used.
**/
public NullComparator()
: this(ComparableComparator.getInstance(), true)
{
}