org.apache.openjpa.kernel
Class InverseManager

java.lang.Object
  org.apache.openjpa.kernel.InverseManager

All Implemented Interfaces:

Configurable

public class InverseManager
extends Object
implements Configurable

Class which manages inverse relations before flushing to the datastore. Ensures that inverse fields are set. Currently limited to managing PC and Collection-type relations.

Author:

Steve Kim

Field Summary

protected DataCacheManager	_mgr
static int	ACTION_EXCEPTION Constant representing the ACTION_EXCEPTION action
static int	ACTION_MANAGE Constant representing the ACTION_MANAGE action
static int	ACTION_WARN Constant representing the ACTION_WARN action
protected static Object	NONE

Constructor Summary

InverseManager()

Method Summary

protected void	addToCollection(OpenJPAStateManager sm, FieldMetaData fmd, Object val) Add the given value to the collection at the selected field.
protected void	clearInverseRelations(OpenJPAStateManager sm, FieldMetaData fmd, FieldMetaData[] inverses, Object newValue) Remove all relations between the initial value of fmd for the instance managed by sm and its inverses.
protected void	clearInverseRelations(OpenJPAStateManager sm, Object val, FieldMetaData fmd, FieldMetaData[] inverses) Clear all inverse the relations from val to the instance managed by sm.
void	correctRelations(OpenJPAStateManager sm, FieldMetaData fmd, Object value) Correct relations from the given dirty field to inverse instances.
protected void	createInverseRelations(StoreContext ctx, Object fromRef, Object toRef, FieldMetaData fmd, FieldMetaData[] inverses) Create the inverse relations for all the given inverse fields.
void	endConfiguration() Invoked upon completion of bean property configuration for this object.
int	getAction() Return the action constant to use during relationship checking.
boolean	getManageLRS() Return whether to manage LRS fields.
protected void	removeFromCollection(OpenJPAStateManager sm, FieldMetaData fmd, Object val) Remove the given instance from the collection.
void	setAction(int action) Set the action constant to use during relationship checking.
void	setAction(String action) Set the action string to use during relationship checking.
void	setConfiguration(Configuration conf) Invoked prior to setting bean properties.
void	setManageLRS(boolean manage) Set whether to false LRS relations.
void	startConfiguration() Invoked before bean property configuration is begun on this object.
protected void	storeField(OpenJPAStateManager sm, FieldMetaData fmd, Object compare, Object val) Store a given value at the given field.
protected void	storeNull(OpenJPAStateManager sm, FieldMetaData fmd, Object compare) Store null value at the given field.
protected void	throwException(OpenJPAStateManager sm, FieldMetaData fmd) Throw an inconsistency exception
protected void	warnConsistency(OpenJPAStateManager sm, FieldMetaData fmd) Log an inconsistency warning

Methods inherited from class java.lang.Object

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

Field Detail

NONE

protected static final Object NONE

_mgr

protected DataCacheManager _mgr

ACTION_MANAGE

public static final int ACTION_MANAGE

Constant representing the ACTION_MANAGE action

See Also:

Constant Field Values

ACTION_WARN

public static final int ACTION_WARN

Constant representing the ACTION_WARN action

See Also:

Constant Field Values

ACTION_EXCEPTION

public static final int ACTION_EXCEPTION

Constant representing the ACTION_EXCEPTION action

See Also:

Constant Field Values

Constructor Detail

InverseManager

public InverseManager()

Method Detail

getManageLRS

public boolean getManageLRS()

Return whether to manage LRS fields.

setManageLRS

public void setManageLRS(boolean manage)

Set whether to false LRS relations. Defaults to false.

getAction

public int getAction()

Return the action constant to use during relationship checking. Defaults to ACTION_MANAGE.

setAction

public void setAction(int action)

Set the action constant to use during relationship checking. Defaults to ACTION_MANAGE.

setAction

public void setAction(String action)

Set the action string to use during relationship checking. Options include manage, exception, warn. This method is primarily for string-based automated configuration.

startConfiguration

public void startConfiguration()

Description copied from interface: Configurable

Invoked before bean property configuration is begun on this object.

Specified by:

startConfiguration in interface Configurable

endConfiguration

public void endConfiguration()

Description copied from interface: Configurable

Invoked upon completion of bean property configuration for this object.

Specified by:

endConfiguration in interface Configurable

setConfiguration

public void setConfiguration(Configuration conf)

Description copied from interface: Configurable

Invoked prior to setting bean properties.

Specified by:

setConfiguration in interface Configurable

correctRelations

public void correctRelations(OpenJPAStateManager sm,
                             FieldMetaData fmd,
                             Object value)

Correct relations from the given dirty field to inverse instances. Field fmd of the instance managed by sm has value value. Ensure that all inverses relations from value are consistent with this.

createInverseRelations

protected void createInverseRelations(StoreContext ctx,
                                      Object fromRef,
                                      Object toRef,
                                      FieldMetaData fmd,
                                      FieldMetaData[] inverses)

Create the inverse relations for all the given inverse fields. A relation exists from fromRef to toRef; this method creates the inverses.

clearInverseRelations

protected void clearInverseRelations(OpenJPAStateManager sm,
                                     FieldMetaData fmd,
                                     FieldMetaData[] inverses,
                                     Object newValue)

Remove all relations between the initial value of fmd for the instance managed by sm and its inverses. Relations shared with newValue can be left intact.

clearInverseRelations

protected void clearInverseRelations(OpenJPAStateManager sm,
                                     Object val,
                                     FieldMetaData fmd,
                                     FieldMetaData[] inverses)

Clear all inverse the relations from val to the instance managed by sm.

storeNull

protected void storeNull(OpenJPAStateManager sm,
                         FieldMetaData fmd,
                         Object compare)

Store null value at the given field. Verify that the given compare value is the value being nulled. Pass NONE for no comparison.

storeField

protected void storeField(OpenJPAStateManager sm,
                          FieldMetaData fmd,
                          Object compare,
                          Object val)

Store a given value at the given field. Compare the given argument if not NONE.

removeFromCollection

protected void removeFromCollection(OpenJPAStateManager sm,
                                    FieldMetaData fmd,
                                    Object val)

Remove the given instance from the collection.

addToCollection

protected void addToCollection(OpenJPAStateManager sm,
                               FieldMetaData fmd,
                               Object val)

Add the given value to the collection at the selected field.

warnConsistency

protected void warnConsistency(OpenJPAStateManager sm,
                               FieldMetaData fmd)

Log an inconsistency warning

throwException

protected void throwException(OpenJPAStateManager sm,
                              FieldMetaData fmd)

Throw an inconsistency exception