org.eclipse.persistence.mappings.converters

Class ClassInstanceConverter

java.lang.Object

org.eclipse.persistence.mappings.converters.ClassInstanceConverter

All Implemented Interfaces:

Serializable, Converter

public class ClassInstanceConverter
extends Object
implements Converter

Purpose: Allows a class name to be converted to and from a new instance of the class. When using a ClassInstanceConverter, the database will store the Class name and the java object model will contain an instance of that class initialized with its default constructor

Since:

OracleAS TopLink 10g (10.0.3)

Author:

James Sutherland

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
ClassInstanceConverter() PUBLIC: Default constructor.

Method Summary

Methods

Modifier and Type	Method and Description
Object	convertDataValueToObjectValue(Object fieldValue, Session session) INTERNAL: Convert the class name to a class, then create an instance of the class.
Object	convertObjectValueToDataValue(Object attributeValue, Session session) INTERNAL: Convert to the field class.
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

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

Constructor Detail

ClassInstanceConverter

public ClassInstanceConverter()

PUBLIC: Default constructor.

Method Detail

convertDataValueToObjectValue

public Object convertDataValueToObjectValue(Object fieldValue,
                                   Session session)

INTERNAL: Convert the class name to a class, then create an instance of the class.

Specified by:

convertDataValueToObjectValue in interface Converter

convertObjectValueToDataValue

public Object convertObjectValueToDataValue(Object attributeValue,
                                   Session session)

INTERNAL: Convert to the field class.

Specified by:

convertObjectValueToDataValue in interface Converter

initialize

public void initialize(DatabaseMapping mapping,
              Session session)

INTERNAL: Set the mapping.

Specified by:

initialize in interface Converter

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