er.extensions.foundation
Class ERXComparatorSupport

java.lang.Object
  er.extensions.foundation.ERXComparatorSupport

public class ERXComparatorSupport
extends Object

Useful methods when working with NSComparator.

Author:

Chuck Hill

Constructor Summary

ERXComparatorSupport()

Method Summary

static int	compareWithNullsFirst(NSComparator comparator, Object object1, Object object2) Compares object1 and object2 using comparator.
static int	compareWithNullsLast(NSComparator comparator, Object object1, Object object2) Compares object1 and object2 using comparator.

Methods inherited from class java.lang.Object

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

Constructor Detail

ERXComparatorSupport

public ERXComparatorSupport()

Method Detail

compareWithNullsFirst

public static int compareWithNullsFirst(NSComparator comparator,
                                        Object object1,
                                        Object object2)
                                 throws NSComparator.ComparisonException

Compares object1 and object2 using comparator. If object1 or object2 is null/NSKeyValueCoding.NullValue it will sort before the other object.

Parameters:

comparator - NSComparator instance to use if both object1 and object2 are not null/NSKeyValueCoding.NullValue

object1 - first object to compare

object2 - second object to compare

Returns:

the result of comparing object1 to object2

Throws:

NSComparator.ComparisonException - if comparator throws this comparing object1 to object2

compareWithNullsLast

public static int compareWithNullsLast(NSComparator comparator,
                                       Object object1,
                                       Object object2)
                                throws NSComparator.ComparisonException

Compares object1 and object2 using comparator. If object1 or object2 is null/NSKeyValueCoding.NullValue it will sort after the other object.

Parameters:

comparator - NSComparator instance to use if both object1 and object2 are not null/NSKeyValueCoding.NullValue

object1 - first object to compare

object2 - second object to compare

Returns:

the result of comparing object1 to object2

Throws:

NSComparator.ComparisonException - if comparator throws this comparing object1 to object2