Inheritance diagram for javolution.util.internal.comparator.WrapperComparatorImpl< E >:

Collaboration diagram for javolution.util.internal.comparator.WrapperComparatorImpl< E >:

Public Member Functions
	WrapperComparatorImpl (Comparator<? super E > comparator)

int	hashCodeOf (E obj)

boolean	areEqual (E e1, E e2)

int	compare (E left, E right)

int	hashCodeOf (T object)

boolean	areEqual (T left, T right)

int	compare (T left, T right)

Private Attributes
final Comparator<? super E >	comparator

Static Private Attributes
static final long	serialVersionUID = 8775282553794347279L

Detailed Description

A comparator service wrapping a {@ link Comparator}, since consistency with hashcode cannot be maintained. The hashcode calculation method throws UnsupportedOperationException.

Definition at line 21 of file WrapperComparatorImpl.java.

Constructor & Destructor Documentation

◆ WrapperComparatorImpl()

javolution.util.internal.comparator.WrapperComparatorImpl< E >.WrapperComparatorImpl ( Comparator<? super E > comparator )

Definition at line 27 of file WrapperComparatorImpl.java.

                                                                    {
         this.comparator = comparator;
     }

References javolution.util.internal.comparator.WrapperComparatorImpl< E >.comparator.

Member Function Documentation

◆ areEqual() [1/2]

boolean javolution.util.internal.comparator.WrapperComparatorImpl< E >.areEqual	(	E	e1,
		E	e2
	)

Definition at line 40 of file WrapperComparatorImpl.java.

                                         {
         return (e1 == e2) || (e1 != null && (comparator.compare(e1, e2) == 0));
     }

References javolution.util.internal.comparator.WrapperComparatorImpl< E >.comparator.

◆ areEqual() [2/2]

boolean javolution.util.function.Equality< T >.areEqual	(	T	left,
		T	right
	)

inherited

Indicates if the specified objects can be considered equal. This methods is equivalent to

(compare(o1, o2) == 0)

but usually faster.

Parameters

left	the first object (or `null`).
right	the second object (or `null`).

Returns: true if both objects are considered equal; false otherwise.

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◆ compare() [1/2]

int javolution.util.internal.comparator.WrapperComparatorImpl< E >.compare	(	E	left,
		E	right
	)

Definition at line 45 of file WrapperComparatorImpl.java.

                                         {
         if (left == right)
             return 0;
         if (left == null)
             return -1;
         if (right == null)
             return 1;
         return comparator.compare(left, right);
     }

References javolution.util.internal.comparator.WrapperComparatorImpl< E >.comparator.

◆ compare() [2/2]

int javolution.util.function.Equality< T >.compare	(	T	left,
		T	right
	)

inherited

Compares the specified objects for order. Returns a negative integer, zero, or a positive integer as the first argument is less than, possibly equal to, or greater than the second. Implementation classes should ensure that comparisons with

null

is supported.

Parameters

left	the first object.
right	the second object.

Returns: a negative integer, zero, or a positive integer as the first argument is less than, possibly equal to, or greater than the second.

Referenced by javolution.util.internal.set.sorted.SubSortedSetImpl< E >.add(), javolution.util.internal.map.MapView< K, V >.EntryComparator.compare(), javolution.text.CharArray.compareTo(), javolution.text.Text.compareTo(), javolution.util.internal.set.sorted.SubSortedSetImpl< E >.contains(), javolution.util.internal.map.sorted.SubSortedMapImpl< K, V >.containsKey(), javolution.util.internal.map.sorted.SubSortedMapImpl< K, V >.get(), javolution.util.internal.set.sorted.SubSortedSetImpl< E >.IteratorImpl.hasNext(), javolution.util.internal.map.sorted.SubSortedMapImpl< K, V >.IteratorImpl.hasNext(), javolution.util.internal.map.sorted.SubSortedMapImpl< K, V >.put(), javolution.util.internal.set.sorted.SubSortedSetImpl< E >.remove(), and javolution.util.internal.map.sorted.SubSortedMapImpl< K, V >.remove().

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◆ hashCodeOf() [1/2]

int javolution.util.internal.comparator.WrapperComparatorImpl< E >.hashCodeOf ( E obj )

Definition at line 32 of file WrapperComparatorImpl.java.

                                  {
         throw new UnsupportedOperationException(
                 "Standard comparator (java.util.Comparator) cannot be used for "
                         + "hashcode calculations; please use a coherent equality comparator "
                         + "instead (e.g. javolution.util.function.Equality).");
     }

◆ hashCodeOf() [2/2]

int javolution.util.function.Equality< T >.hashCodeOf ( T object )

inherited

Returns the hash code for the specified object (consistent with areEqual). Two objects considered equal have the same hash code. The hash code of null is always 0.

Parameters

object the object to return the hashcode for.