org.datanucleus.enhancer

Class ImplementationCreatorImpl

java.lang.Object

org.datanucleus.enhancer.ImplementationCreatorImpl

All Implemented Interfaces:

Serializable, ImplementationCreator

public class ImplementationCreatorImpl
extends Object
implements Serializable, ImplementationCreator

Creator of persistable objects using the ASM bytecode manipulation library.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected EnhancerClassLoader	loader ClassLoader for newly defined classes
protected MetaDataManager	metaDataMgr MetaData manager to use.

Constructor Summary

Constructors

Constructor and Description
ImplementationCreatorImpl(MetaDataManager mmgr) Constructor.

Method Summary

Modifier and Type	Method and Description
ClassLoader	getClassLoader() Accessor for the ClassLoader.
protected ImplementationGenerator	getGenerator(AbstractClassMetaData acmd, String implClassName) Method to return the generator for the implementation.
Object	newInstance(Class cls, ClassLoaderResolver clr) Method to generate an instance of an interface, abstract class, or concrete PC class.
protected Persistable	newInstance(ClassMetaData cmd, ClassLoaderResolver clr) Constructs an implementation for an abstract class and instantiates it.
protected Persistable	newInstance(InterfaceMetaData imd, ClassLoaderResolver clr) Constructs an implementation for an interface and instantiates it.

Methods inherited from class java.lang.Object

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

Field Detail

metaDataMgr

protected final MetaDataManager metaDataMgr

MetaData manager to use.

loader

protected final EnhancerClassLoader loader

ClassLoader for newly defined classes

Constructor Detail

ImplementationCreatorImpl

public ImplementationCreatorImpl(MetaDataManager mmgr)

Constructor.

Parameters:

mmgr - MetaData manager

Method Detail

getClassLoader

public ClassLoader getClassLoader()

Accessor for the ClassLoader.

Specified by:

getClassLoader in interface ImplementationCreator

Returns:

The ClassLoader

newInstance

public Object newInstance(Class cls,
                          ClassLoaderResolver clr)

Method to generate an instance of an interface, abstract class, or concrete PC class.

Specified by:

newInstance in interface ImplementationCreator

Parameters:

cls - The class of the interface, abstract class, or concrete class defined in MetaData

clr - ClassLoader resolver

Returns:

The instance of this type

newInstance

protected Persistable newInstance(InterfaceMetaData imd,
                                  ClassLoaderResolver clr)
                           throws ClassNotFoundException,
                                  InstantiationException,
                                  IllegalAccessException

Constructs an implementation for an interface and instantiates it.

Parameters:

imd - The MetaData for the interface

clr - The ClassLoader

Returns:

The instance implementing the interface

Throws:

ClassNotFoundException - If an error occurs

InstantiationException - If an error occurs

IllegalAccessException - If an error occurs

newInstance

protected Persistable newInstance(ClassMetaData cmd,
                                  ClassLoaderResolver clr)
                           throws ClassNotFoundException,
                                  InstantiationException,
                                  IllegalAccessException

Constructs an implementation for an abstract class and instantiates it.

Parameters:

cmd - The MetaData for the abstract class

clr - The ClassLoader

Returns:

The instance implementing the abstract class.

Throws:

ClassNotFoundException - if an error occurs

InstantiationException - if an error occurs

IllegalAccessException - if an error occurs

getGenerator

protected ImplementationGenerator getGenerator(AbstractClassMetaData acmd,
                                               String implClassName)

Method to return the generator for the implementation.

Parameters:

acmd - MetaData for the interface or abstract class

implClassName - Name of the implementation class to create

Returns:

The implementation generator