nl.knowledgeplaza.util.jpa
Class EntityManagerChangeCount

java.lang.Object
  nl.knowledgeplaza.util.jpa.EntityManagerChangeCount

public class EntityManagerChangeCount
extends java.lang.Object

ChangeCount: a per EntityManager registration of changes present in the BM The logical place to maintain a indication of if there are any pending changes, is within the BM. Any other place (like the GUI) will result in complex administration, but using the property change event it is easily registered in the BM. There is one issue: the does not automatically clear when the EntityManager refreshes, so this has to be done explicitely from the code (TODO: can this be detected somehow????)

Author:

user

Nested Class Summary

static interface	EntityManagerChangeCount.DataChangeListener
static class	EntityManagerChangeCount.EntityChangeEvent
static interface	EntityManagerChangeCount.EntityChangeListener

Constructor Summary

EntityManagerChangeCount()

Method Summary

static void	addDataChange(java.lang.String name) Force-add a change
static void	addDataChangeListener(EntityManagerChangeCount.DataChangeListener o) DataChangeListener
static void	addEntityChangeListener(EntityManagerChangeCount.EntityChangeListener o) DataChangeListener
static void	clearPendingChanges()
static void	clearPendingChanges(javax.persistence.EntityManager entityManager)
static java.lang.String	describePendingChangesDetailed()
static java.lang.String	describePendingChangesDetailed(javax.persistence.EntityManager entityManager)
static java.lang.String	describePendingChangesSimple()
static java.lang.String	describePendingChangesSimple(javax.persistence.EntityManager entityManager)
static void	fireDataChanges()
static void	fireEntityChanges(EntityManagerChangeCount.EntityChangeEvent event)
static boolean	hasPendingChanges()
static boolean	hasPendingChanges(javax.persistence.EntityManager entityManager)
static void	markAsChanged(java.lang.Object o)
static void	markAsUnchanged(java.lang.Object o)
static void	removeDataChangeListener(EntityManagerChangeCount.DataChangeListener o)
static void	removeEntityChangeListener(EntityManagerChangeCount.EntityChangeListener o)

Methods inherited from class java.lang.Object

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

Constructor Detail

EntityManagerChangeCount

public EntityManagerChangeCount()

Method Detail

markAsChanged

public static void markAsChanged(java.lang.Object o)

Parameters:

o -

markAsUnchanged

public static void markAsUnchanged(java.lang.Object o)

Parameters:

o -

hasPendingChanges

public static boolean hasPendingChanges()

Returns:

hasPendingChanges

public static boolean hasPendingChanges(javax.persistence.EntityManager entityManager)

Returns:

describePendingChangesSimple

public static java.lang.String describePendingChangesSimple()

Returns:

describePendingChangesSimple

public static java.lang.String describePendingChangesSimple(javax.persistence.EntityManager entityManager)

Returns:

describePendingChangesDetailed

public static java.lang.String describePendingChangesDetailed()

Returns:

describePendingChangesDetailed

public static java.lang.String describePendingChangesDetailed(javax.persistence.EntityManager entityManager)

Returns:

clearPendingChanges

public static void clearPendingChanges()

clearPendingChanges

public static void clearPendingChanges(javax.persistence.EntityManager entityManager)

addEntityChangeListener

public static void addEntityChangeListener(EntityManagerChangeCount.EntityChangeListener o)

DataChangeListener

removeEntityChangeListener

public static void removeEntityChangeListener(EntityManagerChangeCount.EntityChangeListener o)

fireEntityChanges

public static void fireEntityChanges(EntityManagerChangeCount.EntityChangeEvent event)

addDataChangeListener

public static void addDataChangeListener(EntityManagerChangeCount.DataChangeListener o)

DataChangeListener

removeDataChangeListener

public static void removeDataChangeListener(EntityManagerChangeCount.DataChangeListener o)

fireDataChanges

public static void fireDataChanges()

addDataChange

public static void addDataChange(java.lang.String name)

Force-add a change

Parameters:

name -