org.richfaces.cdk.util
Class ComparatorUtils

java.lang.Object
  org.richfaces.cdk.util.ComparatorUtils

public final class ComparatorUtils
extends java.lang.Object

Helper methods for comparable types

Author:

Nick Belaevski

Method Summary

static <T extends java.lang.Comparable<T>> int	nullSafeCompare(T t1, T t2) Does null-safe comparison of mutually comparable objects.
static <T> boolean	nullSafeEquals(T t1, T t2) Null-safe equals check.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

nullSafeCompare

public static <T extends java.lang.Comparable<T>> int nullSafeCompare(T t1,
                                                                      T t2)

Does null-safe comparison of mutually comparable objects.

Obeys common rules of Comparable.compareTo(Object) methods if both objects to compare are non-null.

If one of the objects is null, but the other is not, then null object is considered to be less than non-null.

Two null objects are considered as equal.

Type Parameters:

T - the type of objects that this object may be compared to

Parameters:

t1 - the first object

t2 - the second object

Returns:

nullSafeEquals

public static <T> boolean nullSafeEquals(T t1,
                                         T t2)

Null-safe equals check. Return true if both arguments are null or equal.

Type Parameters:

T - the type of objects to compare.

Parameters:

t1 -

t2 -

Returns:

true if both arguments are null or equal