org.eclipse.persistence.internal.jpa.weaving

Class TransformerFactory

java.lang.Object

org.eclipse.persistence.internal.jpa.weaving.TransformerFactory

public class TransformerFactory
extends java.lang.Object

This class creates a ClassFileTransformer that is used for dynamic bytecode weaving. It is called by EntityManagerSetupImpl.predeploy(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 org.eclipse.persistence.descriptors.changetracking.ObjectChangePolicy for the Descriptor).

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	CANNOT_WEAVE_CHANGETRACKING
static java.lang.String	CANNOT_WEAVE_VIRTUAL_ONE_TO_ONE
protected java.util.Map<java.lang.String,ClassDetails>	classDetailsMap
protected java.lang.ClassLoader	classLoader
protected java.util.Collection<MetadataClass>	entityClasses
protected Session	session
protected boolean	weaveChangeTracking
protected boolean	weaveFetchGroups
protected boolean	weaveInternal
protected boolean	weaveLazy
protected boolean	weaveMappedSuperClass
static java.lang.String	WEAVER_CLASS_NOT_IN_PROJECT
static java.lang.String	WEAVER_DISABLE_BY_SYSPROP
static java.lang.String	WEAVER_DISABLE_CT_NOT_SUPPORTED
static java.lang.String	WEAVER_FOUND_USER_IMPL_CT
static java.lang.String	WEAVER_NULL_PROJECT
static java.lang.String	WEAVER_PROCESSING_CLASS
protected boolean	weaveRest

Constructor Summary

Constructors

Constructor and Description
TransformerFactory(Session session, java.util.Collection<MetadataClass> entityClasses, java.lang.ClassLoader classLoader, boolean weaveLazy, boolean weaveChangeTracking, boolean weaveFetchGroups, boolean weaveInternal, boolean weaveRest, boolean weaveMappedSuperClass)

Method Summary

Modifier and Type	Method and Description
void	addClassDetailsForMappedSuperClasses(MetadataClass clz, ClassDescriptor initialDescriptor, ClassDetails classDetails, java.util.Map classDetailsMap, java.util.List unMappedAttributes, boolean weaveChangeTracking) 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.
PersistenceWeaver	buildPersistenceWeaver()
protected boolean	canChangeTrackingBeEnabled(ClassDescriptor descriptor, MetadataClass clz, boolean globalWeaveChangeTracking) Check to ensure the class meets all the conditions necessary to enable change tracking This could occur either if the class already has change tracking implemented or if the class is capable of having change tracking woven based on the descriptor.
protected boolean	canWeaveValueHolders(MetadataClass clz, java.util.List mappings) Determine if value holders are required to be weaved into the class.
static PersistenceWeaver	createTransformerAndModifyProject(Session session, java.util.Collection<MetadataClass> entityClasses, java.lang.ClassLoader classLoader, boolean weaveLazy, boolean weaveChangeTracking, boolean weaveFetchGroups, boolean weaveInternal, boolean weaveRest, boolean weaveMappedSuperClass)
protected ClassDescriptor	findDescriptor(Project project, java.lang.String className) Find a descriptor by name in the given project used to avoid referring to descriptors by class.
protected boolean	hasFieldInClass(MetadataClass metadataClass, java.lang.String attributeName) Return if the class contains the field.
protected void	log(int level, java.lang.String msg, java.lang.Object[] params)
protected java.util.List	storeAttributeMappings(MetadataClass metadataClass, ClassDetails classDetails, java.util.List mappings, boolean weaveValueHolders) INTERNAL: Store a set of attribute mappings on the given ClassDetails that correspond to the given class.
protected boolean	wasChangeTrackingAlreadyWeaved(java.lang.Class clz)

Methods inherited from class java.lang.Object

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

Field Detail

WEAVER_DISABLE_CT_NOT_SUPPORTED

public static final java.lang.String WEAVER_DISABLE_CT_NOT_SUPPORTED

See Also:

Constant Field Values

WEAVER_FOUND_USER_IMPL_CT

public static final java.lang.String WEAVER_FOUND_USER_IMPL_CT

See Also:

Constant Field Values

WEAVER_NULL_PROJECT

public static final java.lang.String WEAVER_NULL_PROJECT

See Also:

Constant Field Values

WEAVER_DISABLE_BY_SYSPROP

public static final java.lang.String WEAVER_DISABLE_BY_SYSPROP

See Also:

Constant Field Values

WEAVER_CLASS_NOT_IN_PROJECT

public static final java.lang.String WEAVER_CLASS_NOT_IN_PROJECT

See Also:

Constant Field Values

WEAVER_PROCESSING_CLASS

public static final java.lang.String WEAVER_PROCESSING_CLASS

See Also:

Constant Field Values

CANNOT_WEAVE_CHANGETRACKING

public static final java.lang.String CANNOT_WEAVE_CHANGETRACKING

See Also:

Constant Field Values

CANNOT_WEAVE_VIRTUAL_ONE_TO_ONE

public static final java.lang.String CANNOT_WEAVE_VIRTUAL_ONE_TO_ONE

See Also:

Constant Field Values

session

protected Session session

entityClasses

protected java.util.Collection<MetadataClass> entityClasses

classDetailsMap

protected java.util.Map<java.lang.String,ClassDetails> classDetailsMap

classLoader

protected java.lang.ClassLoader classLoader

weaveChangeTracking

protected boolean weaveChangeTracking

weaveLazy

protected boolean weaveLazy

weaveFetchGroups

protected boolean weaveFetchGroups

weaveInternal

protected boolean weaveInternal

weaveRest

protected boolean weaveRest

weaveMappedSuperClass

protected boolean weaveMappedSuperClass

Constructor Detail

TransformerFactory

public TransformerFactory(Session session,
                          java.util.Collection<MetadataClass> entityClasses,
                          java.lang.ClassLoader classLoader,
                          boolean weaveLazy,
                          boolean weaveChangeTracking,
                          boolean weaveFetchGroups,
                          boolean weaveInternal,
                          boolean weaveRest,
                          boolean weaveMappedSuperClass)

Method Detail

createTransformerAndModifyProject

public static PersistenceWeaver createTransformerAndModifyProject(Session session,
                                                                  java.util.Collection<MetadataClass> entityClasses,
                                                                  java.lang.ClassLoader classLoader,
                                                                  boolean weaveLazy,
                                                                  boolean weaveChangeTracking,
                                                                  boolean weaveFetchGroups,
                                                                  boolean weaveInternal,
                                                                  boolean weaveRest,
                                                                  boolean weaveMappedSuperClass)

addClassDetailsForMappedSuperClasses

public void addClassDetailsForMappedSuperClasses(MetadataClass clz,
                                                 ClassDescriptor initialDescriptor,
                                                 ClassDetails classDetails,
                                                 java.util.Map classDetailsMap,
                                                 java.util.List unMappedAttributes,
                                                 boolean weaveChangeTracking)

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 owning class or from a superclass.

buildPersistenceWeaver

public PersistenceWeaver buildPersistenceWeaver()

buildClassDetailsAndModifyProject

public void buildClassDetailsAndModifyProject()

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

canChangeTrackingBeEnabled

protected boolean canChangeTrackingBeEnabled(ClassDescriptor descriptor,
                                             MetadataClass clz,
                                             boolean globalWeaveChangeTracking)

Check to ensure the class meets all the conditions necessary to enable change tracking This could occur either if the class already has change tracking implemented or if the class is capable of having change tracking woven based on the descriptor.

wasChangeTrackingAlreadyWeaved

protected boolean wasChangeTrackingAlreadyWeaved(java.lang.Class clz)

canWeaveValueHolders

protected boolean canWeaveValueHolders(MetadataClass clz,
                                       java.util.List mappings)

Determine if value holders are required to be weaved into the class.

findDescriptor

protected ClassDescriptor findDescriptor(Project project,
                                         java.lang.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

hasFieldInClass

protected boolean hasFieldInClass(MetadataClass metadataClass,
                                  java.lang.String attributeName)

Return if the class contains the field.

storeAttributeMappings

protected java.util.List storeAttributeMappings(MetadataClass metadataClass,
                                                ClassDetails classDetails,
                                                java.util.List mappings,
                                                boolean weaveValueHolders)

INTERNAL: Store a set of attribute mappings on the given ClassDetails that correspond 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.

log

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