oracle.toplink.essentials.internal.weaving

Class TransformerFactory

java.lang.Object

oracle.toplink.essentials.internal.weaving.TransformerFactory

public class TransformerFactory
extends Object

INTERNAL: This class creates a ClassFileTransformer that is used for dynamic bytecode weaving. It is called by EntityManagerSetupImpl.predeploy(javax.persistence.spi.PersistenceUnitInfo, java.util.Map)

Note: The Session's Project is is scanned to ensure that weaving is supported and is modified to suit (set the ObjectChangePolicy for the Descriptor).

Field Summary

Fields

Modifier and Type	Field and Description
protected Map	classDetailsMap
protected ClassLoader	classLoader
protected List	embeddableClasses
protected Collection	entityClasses
protected Session	session
static String	WEAVER_ADDING_EMBEDDABLE
static String	WEAVER_CLASS_NOT_IN_PROJECT
static String	WEAVER_DISABLE_BY_SYSPROP
static String	WEAVER_FOUND_FIELD_LOCK
static String	WEAVER_NULL_PROJECT
static String	WEAVER_PROCESSING_CLASS

Constructor Summary

Constructors

Constructor and Description
TransformerFactory(Session session, Collection entityClasses, ClassLoader classLoader)

Method Summary

Modifier and Type	Method and Description
void	addClassDetailsForMappedSuperClasses(Class clz, ClassDescriptor initialDescriptor, ClassDetails classDetails, Map classDetailsMap, List unMappedAttributes) INTERNAL: Look higher in the hierarchy for the mappings listed in the unMappedAttribute list.
void	buildClassDetailsAndModifyProject() Build a list ClassDetails instance that contains a ClassDetails for each class in our entities list.
ClassTransformer	buildTopLinkWeaver()
protected boolean	canWeaveValueHolders(Class clz, List mappings)
static ClassTransformer	createTransformerAndModifyProject(Session session, Collection entityClasses, ClassLoader classLoader)
protected ClassDescriptor	findDescriptor(Project project, String className) Find a descriptor by name in the given project used to avoid referring to descriptors by class.
protected static boolean	hasField(Class clz, String fieldName)
protected void	log(int level, String msg, Object[] params)
protected List	storeAttributeMappings(Class clz, ClassDetails classDetails, List mappings, boolean weaveValueHolders) INTERNAL: Store a set of attribute mappings on the given ClassDetails taht correspont to the given class.

Methods inherited from class java.lang.Object

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

Field Detail

WEAVER_NULL_PROJECT

public static final String WEAVER_NULL_PROJECT

See Also:

Constant Field Values

WEAVER_DISABLE_BY_SYSPROP

public static final String WEAVER_DISABLE_BY_SYSPROP

See Also:

Constant Field Values

WEAVER_ADDING_EMBEDDABLE

public static final String WEAVER_ADDING_EMBEDDABLE

See Also:

Constant Field Values

WEAVER_FOUND_FIELD_LOCK

public static final String WEAVER_FOUND_FIELD_LOCK

See Also:

Constant Field Values

WEAVER_CLASS_NOT_IN_PROJECT

public static final String WEAVER_CLASS_NOT_IN_PROJECT

See Also:

Constant Field Values

WEAVER_PROCESSING_CLASS

public static final String WEAVER_PROCESSING_CLASS

See Also:

Constant Field Values

session

protected Session session

entityClasses

protected Collection entityClasses

embeddableClasses

protected List embeddableClasses

classDetailsMap

protected Map classDetailsMap

classLoader

protected ClassLoader classLoader

Constructor Detail

TransformerFactory

public TransformerFactory(Session session,
                          Collection entityClasses,
                          ClassLoader classLoader)

Method Detail

createTransformerAndModifyProject

public static ClassTransformer createTransformerAndModifyProject(Session session,
                                                                 Collection entityClasses,
                                                                 ClassLoader classLoader)

addClassDetailsForMappedSuperClasses

public void addClassDetailsForMappedSuperClasses(Class clz,
                                                 ClassDescriptor initialDescriptor,
                                                 ClassDetails classDetails,
                                                 Map classDetailsMap,
                                                 List unMappedAttributes)

INTERNAL: Look higher in the hierarchy for the mappings listed in the unMappedAttribute list. We assume that if a mapping exists, the attribute must either be mapped from the owninig class or from a superclass.

buildTopLinkWeaver

public ClassTransformer buildTopLinkWeaver()

buildClassDetailsAndModifyProject

public void buildClassDetailsAndModifyProject()

Build a list ClassDetails instance that contains a ClassDetails for each class in our entities list.

canWeaveValueHolders

protected boolean canWeaveValueHolders(Class clz,
                                       List mappings)

storeAttributeMappings

protected List storeAttributeMappings(Class clz,
                                      ClassDetails classDetails,
                                      List mappings,
                                      boolean weaveValueHolders)

INTERNAL: Store a set of attribute mappings on the given ClassDetails taht correspont to the given class. Return the list of mappings that is not specifically found on the given class. These attributes will be found on MappedSuperclasses

findDescriptor

protected ClassDescriptor findDescriptor(Project project,
                                         String className)

Find a descriptor by name in the given project used to avoid referring to descriptors by class. This avoids having to construct a project by class facilitating weaving

hasField

protected static boolean hasField(Class clz,
                                  String fieldName)

log

protected void log(int level,
                   String msg,
                   Object[] params)