Package org.datanucleus.store.fieldmanager

Class NullifyRelationFieldManager

java.lang.Object

org.datanucleus.store.fieldmanager.AbstractFieldManager

org.datanucleus.store.fieldmanager.NullifyRelationFieldManager

All Implemented Interfaces:

FieldManager

public class NullifyRelationFieldManager
extends AbstractFieldManager

Manager that nullifies any Collection/Map/PC fields of the object. NOTE : If called on a non-relation field, this will reset the field to 0! Used by "persistence-by-reachability at commit" functionality.

Constructor Summary

Constructors

Constructor	Description
NullifyRelationFieldManager(DNStateManager sm)	Constructor.

Method Summary

Modifier and Type	Method	Description
boolean	fetchBooleanField(int fieldNumber)	Fetch a boolean field at the specified field number, returning it.
byte	fetchByteField(int fieldNumber)	Fetch a byte field at the specified field number, returning it.
char	fetchCharField(int fieldNumber)	Fetch a char field at the specified field number, returning it.
double	fetchDoubleField(int fieldNumber)	Fetch a double field at the specified field number, returning it.
float	fetchFloatField(int fieldNumber)	Fetch a float field at the specified field number, returning it.
int	fetchIntField(int fieldNumber)	Fetch an int field at the specified field number, returning it.
long	fetchLongField(int fieldNumber)	Fetch a long field at the specified field number, returning it.
Object	fetchObjectField(int fieldNumber)	Accessor for object field.
short	fetchShortField(int fieldNumber)	Fetch a short field at the specified field number, returning it.
String	fetchStringField(int fieldNumber)	Fetch a string field at the specified field number, returning it.

Methods inherited from class org.datanucleus.store.fieldmanager.AbstractFieldManager

storeBooleanField, storeByteField, storeCharField, storeDoubleField, storeFloatField, storeIntField, storeLongField, storeObjectField, storeShortField, storeStringField

Methods inherited from class java.lang.Object

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

Constructor Detail

NullifyRelationFieldManager

public NullifyRelationFieldManager(DNStateManager sm)

Constructor.

Parameters:

sm - StateManager

Method Detail

fetchObjectField

public Object fetchObjectField(int fieldNumber)

Accessor for object field.

Specified by:

fetchObjectField in interface FieldManager

Overrides:

fetchObjectField in class AbstractFieldManager

Parameters:

fieldNumber - Number of field

Returns:

Object value

fetchBooleanField

public boolean fetchBooleanField(int fieldNumber)

Description copied from interface: FieldManager

Fetch a boolean field at the specified field number, returning it.

Specified by:

fetchBooleanField in interface FieldManager

Overrides:

fetchBooleanField in class AbstractFieldManager

Parameters:

fieldNumber - Number of the field

Returns:

The value

fetchCharField

public char fetchCharField(int fieldNumber)

Description copied from interface: FieldManager

Fetch a char field at the specified field number, returning it.

Specified by:

fetchCharField in interface FieldManager

Overrides:

fetchCharField in class AbstractFieldManager

Parameters:

fieldNumber - Number of the field

Returns:

The value

fetchByteField

public byte fetchByteField(int fieldNumber)

Description copied from interface: FieldManager

Fetch a byte field at the specified field number, returning it.

Specified by:

fetchByteField in interface FieldManager

Overrides:

fetchByteField in class AbstractFieldManager

Parameters:

fieldNumber - Number of the field

Returns:

The value

fetchDoubleField

public double fetchDoubleField(int fieldNumber)

Description copied from interface: FieldManager

Fetch a double field at the specified field number, returning it.

Specified by:

fetchDoubleField in interface FieldManager

Overrides:

fetchDoubleField in class AbstractFieldManager

Parameters:

fieldNumber - Number of the field

Returns:

The value

fetchFloatField

public float fetchFloatField(int fieldNumber)

Description copied from interface: FieldManager

Fetch a float field at the specified field number, returning it.

Specified by:

fetchFloatField in interface FieldManager

Overrides:

fetchFloatField in class AbstractFieldManager

Parameters:

fieldNumber - Number of the field

Returns:

The value

fetchIntField

public int fetchIntField(int fieldNumber)

Description copied from interface: FieldManager

Fetch an int field at the specified field number, returning it.

Specified by:

fetchIntField in interface FieldManager

Overrides:

fetchIntField in class AbstractFieldManager

Parameters:

fieldNumber - Number of the field

Returns:

The value

fetchLongField

public long fetchLongField(int fieldNumber)

Description copied from interface: FieldManager

Fetch a long field at the specified field number, returning it.

Specified by:

fetchLongField in interface FieldManager

Overrides:

fetchLongField in class AbstractFieldManager

Parameters:

fieldNumber - Number of the field

Returns:

The value

fetchShortField

public short fetchShortField(int fieldNumber)

Description copied from interface: FieldManager

Fetch a short field at the specified field number, returning it.

Specified by:

fetchShortField in interface FieldManager

Overrides:

fetchShortField in class AbstractFieldManager

Parameters:

fieldNumber - Number of the field

Returns:

The value

fetchStringField

public String fetchStringField(int fieldNumber)

Description copied from interface: FieldManager

Fetch a string field at the specified field number, returning it.

Specified by:

fetchStringField in interface FieldManager

Overrides:

fetchStringField in class AbstractFieldManager

Parameters:

fieldNumber - Number of the field

Returns:

The value