com.google.common.collect

Class ReverseOrdering<T>

java.lang.Object

com.google.common.collect.Ordering<T>

com.google.common.collect.ReverseOrdering<T>

All Implemented Interfaces:

java.io.Serializable, java.util.Comparator<T>

@GwtCompatible(serializable=true)
final class ReverseOrdering<T>
extends Ordering<T>
implements java.io.Serializable

An ordering that uses the reverse of a given order.

Nested Class Summary

Nested classes/interfaces inherited from class com.google.common.collect.Ordering

Ordering.ArbitraryOrdering, Ordering.IncomparableValueException

Field Summary

Fields

Modifier and Type	Field and Description
(package private) Ordering<? super T>	forwardOrder
private static long	serialVersionUID

Fields inherited from class com.google.common.collect.Ordering

LEFT_IS_GREATER, RIGHT_IS_GREATER

Constructor Summary

Constructors

Constructor and Description
ReverseOrdering(Ordering<? super T> forwardOrder)

Method Summary

Modifier and Type	Method and Description
int	compare(T a, T b)
boolean	equals(java.lang.Object object)
int	hashCode()
<E extends T> E	max(E a, E b) Returns the greater of the two values according to this ordering.
<E extends T> E	max(E a, E b, E c, E... rest) Returns the greatest of the specified values according to this ordering.
<E extends T> E	max(java.lang.Iterable<E> iterable) Returns the greatest of the specified values according to this ordering.
<E extends T> E	max(java.util.Iterator<E> iterator) Returns the greatest of the specified values according to this ordering.
<E extends T> E	min(E a, E b) Returns the lesser of the two values according to this ordering.
<E extends T> E	min(E a, E b, E c, E... rest) Returns the least of the specified values according to this ordering.
<E extends T> E	min(java.lang.Iterable<E> iterable) Returns the least of the specified values according to this ordering.
<E extends T> E	min(java.util.Iterator<E> iterator) Returns the least of the specified values according to this ordering.
<S extends T> Ordering<S>	reverse() Returns the reverse of this ordering; the Ordering equivalent to Collections.reverseOrder(Comparator).
java.lang.String	toString()

Methods inherited from class com.google.common.collect.Ordering

allEqual, arbitrary, binarySearch, compound, compound, explicit, explicit, from, from, greatestOf, greatestOf, immutableSortedCopy, isOrdered, isStrictlyOrdered, leastOf, leastOf, lexicographical, natural, nullsFirst, nullsLast, onKeys, onResultOf, sortedCopy, usingToString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Comparator

comparing, comparing, comparingDouble, comparingInt, comparingLong, naturalOrder, nullsFirst, nullsLast, reversed, reverseOrder, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Field Detail

forwardOrder

final Ordering<? super T> forwardOrder

serialVersionUID

private static final long serialVersionUID

See Also:

Constant Field Values

Constructor Detail

ReverseOrdering

ReverseOrdering(Ordering<? super T> forwardOrder)

Method Detail

compare

public int compare(T a,
                   T b)

Specified by:

compare in interface java.util.Comparator<T>

Specified by:

compare in class Ordering<T>

reverse

public <S extends T> Ordering<S> reverse()

Description copied from class: Ordering

Returns the reverse of this ordering; the Ordering equivalent to Collections.reverseOrder(Comparator).

Overrides:

reverse in class Ordering<T>

min

public <E extends T> E min(E a,
                           E b)

Description copied from class: Ordering

Returns the lesser of the two values according to this ordering. If the values compare as 0, the first is returned.

Implementation note: this method is invoked by the default implementations of the other min overloads, so overriding it will affect their behavior.

Overrides:

min in class Ordering<T>

Parameters:

a - value to compare, returned if less than or equal to b.

b - value to compare.

min

public <E extends T> E min(E a,
                           E b,
                           E c,
                           E... rest)

Description copied from class: Ordering

Returns the least of the specified values according to this ordering. If there are multiple least values, the first of those is returned.

Overrides:

min in class Ordering<T>

Parameters:

a - value to compare, returned if less than or equal to the rest.

b - value to compare

c - value to compare

rest - values to compare

min

public <E extends T> E min(java.util.Iterator<E> iterator)

Description copied from class: Ordering

Returns the least of the specified values according to this ordering. If there are multiple least values, the first of those is returned. The iterator will be left exhausted: its hasNext() method will return false.

Overrides:

min in class Ordering<T>

Parameters:

iterator - the iterator whose minimum element is to be determined

min

public <E extends T> E min(java.lang.Iterable<E> iterable)

Description copied from class: Ordering

Returns the least of the specified values according to this ordering. If there are multiple least values, the first of those is returned.

Overrides:

min in class Ordering<T>

Parameters:

iterable - the iterable whose minimum element is to be determined

max

public <E extends T> E max(E a,
                           E b)

Description copied from class: Ordering

Returns the greater of the two values according to this ordering. If the values compare as 0, the first is returned.

Implementation note: this method is invoked by the default implementations of the other max overloads, so overriding it will affect their behavior.

Overrides:

max in class Ordering<T>

Parameters:

a - value to compare, returned if greater than or equal to b.

b - value to compare.

max

public <E extends T> E max(E a,
                           E b,
                           E c,
                           E... rest)

Description copied from class: Ordering

Returns the greatest of the specified values according to this ordering. If there are multiple greatest values, the first of those is returned.

Overrides:

max in class Ordering<T>

Parameters:

a - value to compare, returned if greater than or equal to the rest.

b - value to compare

c - value to compare

rest - values to compare

max

public <E extends T> E max(java.util.Iterator<E> iterator)

Description copied from class: Ordering

Returns the greatest of the specified values according to this ordering. If there are multiple greatest values, the first of those is returned. The iterator will be left exhausted: its hasNext() method will return false.

Overrides:

max in class Ordering<T>

Parameters:

iterator - the iterator whose maximum element is to be determined

max

public <E extends T> E max(java.lang.Iterable<E> iterable)

Description copied from class: Ordering

Returns the greatest of the specified values according to this ordering. If there are multiple greatest values, the first of those is returned.

Overrides:

max in class Ordering<T>

Parameters:

iterable - the iterable whose maximum element is to be determined

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

equals

public boolean equals(@Nullable
                      java.lang.Object object)

Specified by:

equals in interface java.util.Comparator<T>

Overrides:

equals in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object