org.apache.openjpa.meta
Class InMemoryValueOrder

java.lang.Object
  org.apache.openjpa.meta.InMemoryValueOrder

All Implemented Interfaces:

Serializable, Comparator, Order

 class InMemoryValueOrder
extends Object
implements Order, Comparator

Order by the field value in memory. If the field contains PersistenceCapable objects, order on their primary key values. Relies on primary key values, including datastore oid objects, being Comparable.

Author:

Abe White

Field Summary

Fields inherited from interface org.apache.openjpa.meta.Order

ELEMENT

Constructor Summary

InMemoryValueOrder(boolean asc, OpenJPAConfiguration conf)

Method Summary

int	compare(Object o1, Object o2)
Comparator	getComparator() Return a comparator for ordering by this element, or null if the ordering is done in the datastore.
String	getName() Return the name of the orderable.
boolean	isAscending() Order direction.

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Comparator

equals

Constructor Detail

InMemoryValueOrder

public InMemoryValueOrder(boolean asc,
                          OpenJPAConfiguration conf)

Method Detail

getName

public String getName()

Description copied from interface: Order

Return the name of the orderable.

Specified by:

getName in interface Order

isAscending

public boolean isAscending()

Description copied from interface: Order

Order direction.

Specified by:

isAscending in interface Order

getComparator

public Comparator getComparator()

Description copied from interface: Order

Return a comparator for ordering by this element, or null if the ordering is done in the datastore.

Specified by:

getComparator in interface Order

compare

public int compare(Object o1,
                   Object o2)

Specified by:

compare in interface Comparator