org.eclipse.persistence.mappings.converters
Class SerializedObjectConverter

java.lang.Object
  org.eclipse.persistence.mappings.converters.SerializedObjectConverter

All Implemented Interfaces:

java.io.Serializable, Converter

public class SerializedObjectConverter
extends java.lang.Object
implements Converter

Purpose: The serialized object converter can be used to store an arbitrary object or set of objects into a database blob field. It uses the Java serializer so the target must be serializable.

See Also:

Serialized Form

Author:

James Sutherland

Since:

OracleAS TopLink 10g (10.0.3)

Field Summary

protected DatabaseMapping

mapping

Constructor Summary

SerializedObjectConverter()
PUBLIC: Default constructor.

SerializedObjectConverter(DatabaseMapping mapping)
PUBLIC: Default constructor.

Method Summary

java.lang.Object	convertDataValueToObjectValue(java.lang.Object fieldValue, Session session) INTERNAL: The fieldValue will be a byte array.
java.lang.Object	convertObjectValueToDataValue(java.lang.Object attributeValue, Session session) INTERNAL: Convert the object to a byte array through serialize.
protected DatabaseMapping	getMapping() INTERNAL: Return the mapping.
void	initialize(DatabaseMapping mapping, Session session) INTERNAL: Set the mapping.
boolean	isMutable() INTERNAL: If the converter converts the value to a non-atomic value, i.e.

Methods inherited from class java.lang.Object

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

Field Detail

mapping

protected DatabaseMapping mapping

Constructor Detail

SerializedObjectConverter

public SerializedObjectConverter()

PUBLIC: Default constructor.

SerializedObjectConverter

public SerializedObjectConverter(DatabaseMapping mapping)

PUBLIC: Default constructor.

Method Detail

convertDataValueToObjectValue

public java.lang.Object convertDataValueToObjectValue(java.lang.Object fieldValue,
                                                      Session session)
                                               throws DescriptorException

INTERNAL: The fieldValue will be a byte array. Create a ByteArrayInputStream on the fieldValue. Create an ObjectInputStream on the ByteArrayInputStream to read in the objects.

Specified by:

convertDataValueToObjectValue in interface Converter

Throws:

DescriptorException

convertObjectValueToDataValue

public java.lang.Object convertObjectValueToDataValue(java.lang.Object attributeValue,
                                                      Session session)

INTERNAL: Convert the object to a byte array through serialize.

Specified by:

convertObjectValueToDataValue in interface Converter

initialize

public void initialize(DatabaseMapping mapping,
                       Session session)

INTERNAL: Set the mapping.

Specified by:

initialize in interface Converter

getMapping

protected DatabaseMapping getMapping()

INTERNAL: Return the mapping.

isMutable

public boolean isMutable()

INTERNAL: If the converter converts the value to a non-atomic value, i.e. a value that can have its' parts changed without being replaced, then it must return false, serialization can be non-atomic.

Specified by:

isMutable in interface Converter