org.eclipse.persistence.internal.jpa

Class CMP3Policy

java.lang.Object

CMPPolicy

org.eclipse.persistence.internal.jpa.CMP3Policy

Direct Known Subclasses:

DynamicIdentityPolicy

public class CMP3Policy
extends CMPPolicy

Defines primary key extraction code for use in JPA. A descriptor should have a CMP3Policy attached to handle basic Id as well as IdClass/EmbeddedId usage.

Since:

TopLink 10.1.3

Field Summary

Fields

Modifier and Type	Field and Description
protected java.util.HashMap<DatabaseField,KeyElementAccessor>	fieldToAccessorMap Used to look up the KeyElementAccessor for a specific DatabaseField, used for resolving DerivedIds
protected KeyElementAccessor[]	keyClassFields Stores the fields for this classes compound primary key class if required.
protected java.lang.Class	pkClass
protected java.lang.String	pkClassName

Constructor Summary

Constructors

Constructor and Description
CMP3Policy()

Method Summary

Modifier and Type	Method and Description
protected void	addReadOnlyMappings(ClassDescriptor aDescriptor, DatabaseField field, java.util.List allMappings) INTERNAL: Add the writable mapping for the given field to the allMappings list.
protected void	addWritableMapping(ClassDescriptor aDescriptor, DatabaseField field, java.util.List allMappings) INTERNAL: Add the read only mappings for the given field to the allMappings list.
CMP3Policy	clone() INTERNAL: Clone the CMP3Policy
void	convertClassNamesToClasses(java.lang.ClassLoader classLoader) INTERNAL: Convert all the class-name-based settings in this object to actual class-based settings.
java.lang.Object	createBeanUsingKey(java.lang.Object key, AbstractSession session) INTERNAL: Use the key to create a bean and initialize its primary key fields.
java.lang.Object	createPrimaryKeyFromId(java.lang.Object key, AbstractSession session) INTERNAL: Use the key to create a EclipseLink primary key.
protected java.lang.reflect.Field	getField(java.lang.Class cls, java.lang.String fieldName) INTERNAL:
protected KeyElementAccessor[]	getKeyClassFields() INTERNAL:
java.lang.Class	getPKClass() INTERNAL: Return the java Class representing the primary key class name
java.lang.Object	getPKClassInstance() INTERNAL:
java.lang.String	getPKClassName() INTERNAL:
java.lang.Object	getPkValueFromKeyForField(java.lang.Object key, DatabaseField field, AbstractSession session) INTERNAL: Pull the value for the field from the key.
void	initialize(ClassDescriptor descriptor, AbstractSession session) INTERNAL: Initialize the CMPPolicy settings.
protected KeyElementAccessor[]	initializePrimaryKeyFields(java.lang.Class keyClass, AbstractSession session) INTERNAL: Cache the bean's primary key fields so speed up creating of primary key objects and initialization of beans.
boolean	isCMP3Policy() INTERNAL: Return if this policy is for CMP3.
void	remoteInitialize(ClassDescriptor descriptor, AbstractSession session) INTERNAL: Initialize the CMPPolicy settings for remote sessions.
void	setPKClass(java.lang.Class pkClass) ADVANCED:
void	setPrimaryKeyClassName(java.lang.String pkClassName) INTERNAL:

Methods inherited from class java.lang.Object

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

Field Detail

keyClassFields

protected transient KeyElementAccessor[] keyClassFields

Stores the fields for this classes compound primary key class if required.

fieldToAccessorMap

protected transient java.util.HashMap<DatabaseField,KeyElementAccessor> fieldToAccessorMap

Used to look up the KeyElementAccessor for a specific DatabaseField, used for resolving DerivedIds

pkClassName

protected java.lang.String pkClassName

pkClass

protected java.lang.Class pkClass

Constructor Detail

CMP3Policy

public CMP3Policy()

Method Detail

addWritableMapping

protected void addWritableMapping(ClassDescriptor aDescriptor,
                                  DatabaseField field,
                                  java.util.List allMappings)

INTERNAL: Add the read only mappings for the given field to the allMappings list.

Parameters:

aDescriptor -

field -

allMappings -

addReadOnlyMappings

protected void addReadOnlyMappings(ClassDescriptor aDescriptor,
                                   DatabaseField field,
                                   java.util.List allMappings)

INTERNAL: Add the writable mapping for the given field to the allMappings list.

Parameters:

aDescriptor -

field -

allMappings -

clone

public CMP3Policy clone()

INTERNAL: Clone the CMP3Policy

convertClassNamesToClasses

public void convertClassNamesToClasses(java.lang.ClassLoader classLoader)

INTERNAL: Convert all the class-name-based settings in this object to actual class-based settings. This method is used when converting a project that has been built with class names to a project with classes.

Parameters:

classLoader -

isCMP3Policy

public boolean isCMP3Policy()

INTERNAL: Return if this policy is for CMP3.

setPrimaryKeyClassName

public void setPrimaryKeyClassName(java.lang.String pkClassName)

INTERNAL:

getPKClass

public java.lang.Class getPKClass()

INTERNAL: Return the java Class representing the primary key class name

setPKClass

public void setPKClass(java.lang.Class pkClass)

ADVANCED:

getPKClassName

public java.lang.String getPKClassName()

INTERNAL:

getPKClassInstance

public java.lang.Object getPKClassInstance()

INTERNAL:

createPrimaryKeyFromId

public java.lang.Object createPrimaryKeyFromId(java.lang.Object key,
                                               AbstractSession session)

INTERNAL: Use the key to create a EclipseLink primary key. If the key is simple (direct mapped) then just add it to a vector, otherwise must go through the inefficient process of copying the key into the bean and extracting the key from the bean.

getField

protected java.lang.reflect.Field getField(java.lang.Class cls,
                                           java.lang.String fieldName)
                                    throws java.lang.NoSuchFieldException

INTERNAL:

Parameters:

cls -

fieldName -

Returns:

the field from the class with name equal to fieldName.

Throws:

java.lang.NoSuchFieldException

createBeanUsingKey

public java.lang.Object createBeanUsingKey(java.lang.Object key,
                                           AbstractSession session)

INTERNAL: Use the key to create a bean and initialize its primary key fields. Note: If is a compound PK then a primary key object is being used. This method should only be used for 'templates' when executing queries. The bean built will not be given an EntityContext and should not be used as an actual entity bean.

Parameters:

key - Object the primary key to use for initializing the bean's corresponding pk fields

Returns:

Object

initializePrimaryKeyFields

protected KeyElementAccessor[] initializePrimaryKeyFields(java.lang.Class keyClass,
                                                          AbstractSession session)

INTERNAL: Cache the bean's primary key fields so speed up creating of primary key objects and initialization of beans. Note, we have to re-look up the fields for the bean class since these fields may have been loaded with the wrong loader (thank you Kirk). If the key is compound, we also have to look up the fields for the key.

getKeyClassFields

protected KeyElementAccessor[] getKeyClassFields()

INTERNAL:

Returns:

Returns the keyClassFields.

getPkValueFromKeyForField

public java.lang.Object getPkValueFromKeyForField(java.lang.Object key,
                                                  DatabaseField field,
                                                  AbstractSession session)

INTERNAL: Pull the value for the field from the key.

Parameters:

key - Object the primary key to use to get the value for the field

field - DatabaseField the field to find a value for

Returns:

Object

initialize

public void initialize(ClassDescriptor descriptor,
                       AbstractSession session)
                throws DescriptorException

INTERNAL: Initialize the CMPPolicy settings.

Throws:

DescriptorException

remoteInitialize

public void remoteInitialize(ClassDescriptor descriptor,
                             AbstractSession session)
                      throws DescriptorException

INTERNAL: Initialize the CMPPolicy settings for remote sessions.

Throws:

DescriptorException