com.webobjects.eocontrol
Class EOSortOrdering.ComparisonSupport

java.lang.Object
  |
  +--com.webobjects.eocontrol.EOSortOrdering.ComparisonSupport

Enclosing class:

EOSortOrdering

public static class EOSortOrdering.ComparisonSupport

extends Object

ComparisonSupport provides default implementations of the EOSortOrdering.Comparison interface and a registry for support objects.

Constructor Summary

EOSortOrdering.ComparisonSupport()

Method Summary

int	compareAscending(Object left, Object right) Returns the ordering of left relative to right.
int	compareCaseInsensitiveAscending(Object left, Object right) Returns the ordering of left relative to right, ignoring case.
int	compareCaseInsensitiveDescending(Object left, Object right) Returns the ordering of left relative to right, ignoring case.
int	compareDescending(Object left, Object right) Returns the ordering of left relative to right.
static int	compareValues(Object left, Object right, NSSelector selector) Compares the two objects using selector.
static void	setSupportForClass(EOSortOrdering.ComparisonSupport support, Class aClass) Sets support as the support object to be used for comparing instances of aClass.
static EOSortOrdering.ComparisonSupport	supportForClass(Class aClass) Returns the support object used for doing sort ordering comparisons for instances of aClass.

Methods inherited from class java.lang.Object

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

Constructor Detail

EOSortOrdering.ComparisonSupport

public EOSortOrdering.ComparisonSupport()

Method Detail

compareAscending

public int compareAscending(Object left,
                            Object right)

Returns the ordering of left relative to right.

Parameters:

left - the left hand side object

right - the right hand side object

Returns:

NSComparator.OrderedAscending if right is naturally ordered after left, NSComparator.OrderedDescending if it's naturally ordered before left, and NSComparator.OrderedSame if they're equivalent for ordering purposes

compareCaseInsensitiveAscending

public int compareCaseInsensitiveAscending(Object left,
                                           Object right)

Returns the ordering of left relative to right, ignoring case.

Parameters:

left - the left hand side object

right - the right hand side object

Returns:

NSComparator.OrderedAscending if right is naturally ordered ignoring case after left, NSComparator.OrderedDescending if it's naturally ordered before left, and NSComparator.OrderedSame if they're equivalent for ordering purposes

compareCaseInsensitiveDescending

public int compareCaseInsensitiveDescending(Object left,
                                            Object right)

Returns the ordering of left relative to right, ignoring case.

Parameters:

left - the left hand side object

right - the right hand side object

Returns:

NSComparator.OrderedAscending if right is naturally ordered ignoring case before left, NSComparator.OrderedDescending if it's naturally ordered after left, and NSComparator.OrderedSame if they're equivalent for ordering purposes

compareDescending

public int compareDescending(Object left,
                             Object right)

Returns the ordering of left relative to right.

Parameters:

left - the left hand side object

right - the right hand side object

Returns:

NSComparator.OrderedAscending if right is naturally ordered before left, NSComparator.OrderedDescending if it's naturally ordered after left, and NSComparator.OrderedSame if they're equivalent for ordering purposes

compareValues

public static int compareValues(Object left,
                                Object right,
                                NSSelector selector)

Compares the two objects using selector. You should use this method to compare value objects instead of calling selector directly. This method is the entry point for the comparison support, and calls methods in support objects if appropriate.

Parameters:

left - the object to compare as the left hand side of the inequality

right - the object to compare as the right hand side of the inequality

selector - method selector to use to compare the left and right objects

Returns:

NSComparator.OrderedAscending if right is naturally ordered after left, NSComparator.OrderedDescending if it's naturally ordered before left, and NSComparator.OrderedSame if they're equivalent for ordering purposes

setSupportForClass

public static void setSupportForClass(EOSortOrdering.ComparisonSupport support,
                                      Class aClass)

Sets support as the support object to be used for comparing instances of aClass. When compareValues is called, the methods in support are used to do the comparison for instances of aClass.

Parameters:

support - the comparison support object to be used when comparing instances of aClass

aClass - the Class of objects that will be compared using support

supportForClass

public static EOSortOrdering.ComparisonSupport supportForClass(Class aClass)

Returns the support object used for doing sort ordering comparisons for instances of aClass.

Parameters:

aClass - the Class to create a comparison support object for

Returns:

the support object used for doing sort ordering comparisons for instances of aClass