org.eclipse.persistence.mappings.converters

Class SerializedObjectConverter

java.lang.Object

org.eclipse.persistence.mappings.converters.SerializedObjectConverter

All Implemented Interfaces:

java.io.Serializable, CoreConverter<DatabaseMapping,Session>, org.eclipse.persistence.internal.descriptors.ClassNameConversionRequired, Converter

public class SerializedObjectConverter
extends java.lang.Object
implements Converter, org.eclipse.persistence.internal.descriptors.ClassNameConversionRequired

Purpose: The serialized object converter can be used to store an arbitrary object or set of objects into a database binary or character field. By default it uses the Java serializer so the target must be serializable. A custom Serializer can also be specified, such as XML or JSON.

See Also:

Serializer, XMLSerializer, JSONSerializer, Serialized Form

Author:

James Sutherland

Since:

OracleAS TopLink 10g (10.0.3)

Field Summary

Fields

Modifier and Type	Field and Description
protected DatabaseMapping	mapping
protected Serializer	serializer
protected java.lang.String	serializerClassName
protected java.lang.String	serializerPackage

Constructor Summary

Constructors

Constructor and Description
SerializedObjectConverter() PUBLIC: Default constructor.
SerializedObjectConverter(DatabaseMapping mapping) PUBLIC: Default constructor.
SerializedObjectConverter(DatabaseMapping mapping, Serializer serializer) PUBLIC: Default constructor.
SerializedObjectConverter(DatabaseMapping mapping, java.lang.String serializerClassName) PUBLIC: Default constructor.

Method Summary

Modifier and Type	Method and Description
void	convertClassNamesToClasses(java.lang.ClassLoader classLoader) INTERNAL: Convert all the class-name-based settings in this converter to actual class-based settings.
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.
Serializer	getSerializer() Return the serialize used for this converter.
java.lang.String	getSerializerClassName() Return the class name of the serializer.
java.lang.String	getSerializerPackage() Return the package used for XML and JSON serialization JAXBContext.
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.
void	setSerializer(Serializer serializer) Set the serialize used for this converter.
void	setSerializerClassName(java.lang.String serializerClassName) Set the class name of the serializer.
void	setSerializerPackage(java.lang.String serializerPackage) Set the package used for XML and JSON serialization JAXBContext.

Methods inherited from class java.lang.Object

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

Field Detail

mapping

protected DatabaseMapping mapping

serializer

protected Serializer serializer

serializerClassName

protected java.lang.String serializerClassName

serializerPackage

protected java.lang.String serializerPackage

Constructor Detail

SerializedObjectConverter

public SerializedObjectConverter()

PUBLIC: Default constructor.

SerializedObjectConverter

public SerializedObjectConverter(DatabaseMapping mapping)

PUBLIC: Default constructor.

SerializedObjectConverter

public SerializedObjectConverter(DatabaseMapping mapping,
                                 Serializer serializer)

PUBLIC: Default constructor.

SerializedObjectConverter

public SerializedObjectConverter(DatabaseMapping mapping,
                                 java.lang.String serializerClassName)

PUBLIC: Default constructor.

Method Detail

convertClassNamesToClasses

public void convertClassNamesToClasses(java.lang.ClassLoader classLoader)

INTERNAL: Convert all the class-name-based settings in this converter to actual class-based settings. This method is used when converting a project that has been built with class names to a project with classes. This method is implemented by subclasses as necessary.

Specified by:

convertClassNamesToClasses in interface org.eclipse.persistence.internal.descriptors.ClassNameConversionRequired

Parameters:

classLoader -

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 CoreConverter<DatabaseMapping,Session>

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 CoreConverter<DatabaseMapping,Session>

Specified by:

convertObjectValueToDataValue in interface Converter

initialize

public void initialize(DatabaseMapping mapping,
                       Session session)

INTERNAL: Set the mapping.

Specified by:

initialize in interface CoreConverter<DatabaseMapping,Session>

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

getSerializer

public Serializer getSerializer()

Return the serialize used for this converter.

setSerializer

public void setSerializer(Serializer serializer)

Set the serialize used for this converter.

getSerializerClassName

public java.lang.String getSerializerClassName()

Return the class name of the serializer.

setSerializerClassName

public void setSerializerClassName(java.lang.String serializerClassName)

Set the class name of the serializer.

getSerializerPackage

public java.lang.String getSerializerPackage()

Return the package used for XML and JSON serialization JAXBContext.

setSerializerPackage

public void setSerializerPackage(java.lang.String serializerPackage)

Set the package used for XML and JSON serialization JAXBContext.