org.datanucleus.enhancer
Class AbstractImplementationCreator

java.lang.Object
  org.datanucleus.enhancer.AbstractImplementationCreator

All Implemented Interfaces:

org.datanucleus.ImplementationCreator

Direct Known Subclasses:

ASMImplementationCreator

public abstract class AbstractImplementationCreator
extends Object
implements org.datanucleus.ImplementationCreator

Abstract representation of an implementation creator. Creates implementations of interfaces or abstract classes.

Field Summary

protected EnhancerClassLoader	loader ClassLoader for newly defined classes
protected static org.datanucleus.util.Localiser	LOCALISER
protected org.datanucleus.metadata.MetaDataManager	metaDataMgr MetaData manager to use.

Constructor Summary

AbstractImplementationCreator(org.datanucleus.metadata.MetaDataManager mmgr)
Constructor.

Method Summary

ClassLoader	getClassLoader() Accessor for the ClassLoader.
protected abstract AbstractImplementationGenerator	getGenerator(org.datanucleus.metadata.AbstractClassMetaData acmd, String implClassName) Method to return the generator for the implementation.
Object	newInstance(Class cls, org.datanucleus.ClassLoaderResolver clr) Method to generate an instance of an interface, abstract class, or concrete PC class.
protected javax.jdo.spi.PersistenceCapable	newInstance(org.datanucleus.metadata.ClassMetaData cmd, org.datanucleus.ClassLoaderResolver clr) Constructs an implementation for an abstract class and instantiates it.
protected javax.jdo.spi.PersistenceCapable	newInstance(org.datanucleus.metadata.InterfaceMetaData imd, org.datanucleus.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

LOCALISER

protected static final org.datanucleus.util.Localiser LOCALISER

metaDataMgr

protected final org.datanucleus.metadata.MetaDataManager metaDataMgr

MetaData manager to use.

loader

protected final EnhancerClassLoader loader

ClassLoader for newly defined classes

Constructor Detail

AbstractImplementationCreator

public AbstractImplementationCreator(org.datanucleus.metadata.MetaDataManager mmgr)

Constructor.

Parameters:

mmgr - MetaData manager

Method Detail

newInstance

public Object newInstance(Class cls,
                          org.datanucleus.ClassLoaderResolver clr)

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

Specified by:

newInstance in interface org.datanucleus.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 javax.jdo.spi.PersistenceCapable newInstance(org.datanucleus.metadata.InterfaceMetaData imd,
                                                       org.datanucleus.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

InstantiationException

IllegalAccessException

newInstance

protected javax.jdo.spi.PersistenceCapable newInstance(org.datanucleus.metadata.ClassMetaData cmd,
                                                       org.datanucleus.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

InstantiationException

IllegalAccessException

getGenerator

protected abstract AbstractImplementationGenerator getGenerator(org.datanucleus.metadata.AbstractClassMetaData acmd,
                                                                String implClassName)

Method to return the generator for the implementation.

Parameters:

acmd - MetaData for the class/interface we need an implementation for

implClassName - Name of the implementation class to create

Returns:

The implementation generator

getClassLoader

public ClassLoader getClassLoader()

Accessor for the ClassLoader.

Specified by:

getClassLoader in interface org.datanucleus.ImplementationCreator

Returns:

The ClassLoader