org.datanucleus.api.jdo

Class JDOAdapter

java.lang.Object

org.datanucleus.api.jdo.JDOAdapter

All Implemented Interfaces:

Serializable, org.datanucleus.api.ApiAdapter

public class JDOAdapter
extends Object
implements org.datanucleus.api.ApiAdapter

Adapter for the JDO API, to allow the DataNucleus core runtime to expose multiple APIs to clients.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected static Set<String>	defaultPersistentTypeNames
protected static org.datanucleus.util.Localiser	LOCALISER

Constructor Summary

Constructors

Constructor and Description
JDOAdapter()

Method Summary

Methods

Modifier and Type	Method and Description
boolean	allowDeleteOfNonPersistentObject() Whether the API allows deletion of a non-persistent object.
boolean	allowPersistOfDeletedObject() Whether the API allows (re-)persistence of a deleted object.
boolean	allowReadFieldOfDeletedObject() Whether the API allows reading a field of a deleted object.
boolean	clearLoadedFlagsOnDeleteObject() Whether the API requires clearing of the fields of an object when it is deleted.
void	copyFieldsFromPersistableObject(Object pc, int[] fieldNumbers, Object pc2)
void	copyPkFieldsToPersistableObjectFromId(Object pc, Object id, org.datanucleus.store.fieldmanager.FieldManager fm)
RuntimeException	getApiExceptionForNucleusException(org.datanucleus.exceptions.NucleusException ne)
Object	getCopyOfPersistableObject(Object obj, org.datanucleus.state.ObjectProvider op, int[] fieldNumbers)
RuntimeException	getDataStoreExceptionForException(String msg, Exception e) Convenience method to return a datastore exception appropriate for this API.
boolean	getDefaultCascadeDeleteForField() Returns the default cascade-delete setting.
boolean	getDefaultCascadePersistForField() Returns the default cascade-persist.
boolean	getDefaultCascadeRefreshForField() Returns the default cascade-refresh setting.
boolean	getDefaultCascadeUpdateForField() Returns the default cascade-update setting.
boolean	getDefaultDFGForPersistableField()
Map	getDefaultFactoryProperties() Method to return the default factory properties for this API.
org.datanucleus.ExecutionContext	getExecutionContext(Object obj) Method to return the ExecutionContext (if any) associated with the passed object.
Object	getIdForObject(Object obj) Method to return the object identity for the passed persistable object.
Class	getKeyTypeForSingleFieldIdentityType(Class idType) Accessor for the type of the single field application-identity key given the single field identity type.
org.datanucleus.state.LifeCycleState	getLifeCycleState(int stateType) Returns the LifeCycleState for the state constant.
String	getName() Accessor for the name of the API.
Object	getNewApplicationIdentityObjectId(org.datanucleus.ClassLoaderResolver clr, org.datanucleus.metadata.AbstractClassMetaData acmd, String value) Utility to create a new application identity when you know the metadata for the target class, and the toString() output of the identity.
Object	getNewApplicationIdentityObjectId(Class cls, Object key) Method to return a new object identity for the specified class, and key (possibly toString() output).
Object	getNewApplicationIdentityObjectId(Object pc, org.datanucleus.metadata.AbstractClassMetaData cmd) Method to create a new object identity for the passed object with the supplied MetaData.
Object	getNewSingleFieldIdentity(Class idType, Class pcType, Object value) Utility to create a new SingleFieldIdentity using reflection when you know the type of the PersistenceCapable, and also which SingleFieldIdentity, and the value of the key.
String	getObjectState(Object obj) Accessor for the object state.
String	getSingleFieldIdentityClassNameForByte() Accessor for the class name to use for identities when there is a single Byte/byte field.
String	getSingleFieldIdentityClassNameForChar() Accessor for the class name to use for identities when there is a single Character/char field.
String	getSingleFieldIdentityClassNameForInt() Accessor for the class name to use for identities when there is a single Integer/int field.
String	getSingleFieldIdentityClassNameForLong() Accessor for the class name to use for identities when there is a single Long/long field.
String	getSingleFieldIdentityClassNameForObject() Accessor for the class name to use for identities when there is a single Object field.
String	getSingleFieldIdentityClassNameForShort() Accessor for the class name to use for identities when there is a single Short/short field.
String	getSingleFieldIdentityClassNameForString() Accessor for the class name to use for identities when there is a single String field.
Class	getTargetClassForSingleFieldIdentity(Object id) Accessor for the target class for the specified single field application-identity.
String	getTargetClassNameForSingleFieldIdentity(Object id) Accessor for the target class name for the specified single field identity.
Object	getTargetKeyForSingleFieldIdentity(Object id) Accessor for the key object for the specified single field application-identity.
RuntimeException	getUserExceptionForException(String msg, Exception e) Convenience method to return a user exception appropriate for this API.
Object	getVersionForObject(Object obj) Method to return the object version for the passed persistable object.
boolean	isDatastoreIdentity(Object id)
boolean	isDeleted(Object obj) Accessor for whether the passed object is deleted.
boolean	isDetachable(Object obj) Method to return if the passed object is detachable using this API.
boolean	isDetached(Object obj) Accessor for whether the passed object is detached.
boolean	isDirty(Object obj) Accessor for whether the passed object is dirty.
boolean	isManaged(Object pc) Whether the provided object is currently managed (has an ExecutionContext).
boolean	isMemberDefaultPersistent(Class type)
boolean	isNew(Object obj) Accessor for whether the passed object is new.
boolean	isPersistable(Class cls) Utility method to check if the specified class is of a type that can be persisted for this API.
boolean	isPersistable(Object obj) Method to return if the passed object is persistable using this API.
boolean	isPersistent(Object obj) Accessor for whether the passed object is persistent.
boolean	isSingleFieldIdentity(Object id) Accessor for whether the passed identity is a valid single-field application-identity for this API.
boolean	isSingleFieldIdentityClass(String className) Checks whether the passed class name is valid for a single field application-identity for this API.
boolean	isTransactional(Object obj) Accessor for whether the passed object is transactional.
boolean	isValidPrimaryKeyClass(Class pkClass, org.datanucleus.metadata.AbstractClassMetaData cmd, org.datanucleus.ClassLoaderResolver clr, int noOfPkFields, org.datanucleus.metadata.MetaDataManager mmgr) Utility to check if a primary-key class is valid.
void	makeDirty(Object obj, String member)

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

defaultPersistentTypeNames

protected static Set<String> defaultPersistentTypeNames

Constructor Detail

JDOAdapter

public JDOAdapter()

Method Detail

getName

public String getName()

Accessor for the name of the API.

Specified by:

getName in interface org.datanucleus.api.ApiAdapter

Returns:

Name of the API

isMemberDefaultPersistent

public boolean isMemberDefaultPersistent(Class type)

Specified by:

isMemberDefaultPersistent in interface org.datanucleus.api.ApiAdapter

isManaged

public boolean isManaged(Object pc)

Whether the provided object is currently managed (has an ExecutionContext).

Specified by:

isManaged in interface org.datanucleus.api.ApiAdapter

Returns:

Whether it is managed

getExecutionContext

public org.datanucleus.ExecutionContext getExecutionContext(Object obj)

Method to return the ExecutionContext (if any) associated with the passed object. Supports persistable objects, and PersistenceManager.

Specified by:

getExecutionContext in interface org.datanucleus.api.ApiAdapter

Parameters:

obj - The object

Returns:

The ExecutionContext

getLifeCycleState

public org.datanucleus.state.LifeCycleState getLifeCycleState(int stateType)

Returns the LifeCycleState for the state constant.

Specified by:

getLifeCycleState in interface org.datanucleus.api.ApiAdapter

Parameters:

stateType - the type as integer

Returns:

the type as LifeCycleState object

isPersistent

public boolean isPersistent(Object obj)

Accessor for whether the passed object is persistent.

Specified by:

isPersistent in interface org.datanucleus.api.ApiAdapter

Parameters:

obj - The object

Returns:

Whether it is persistent

isNew

public boolean isNew(Object obj)

Accessor for whether the passed object is new.

Specified by:

isNew in interface org.datanucleus.api.ApiAdapter

Parameters:

obj - The object

Returns:

Whether it is new

isDirty

public boolean isDirty(Object obj)

Accessor for whether the passed object is dirty.

Specified by:

isDirty in interface org.datanucleus.api.ApiAdapter

Parameters:

obj - The object

Returns:

Whether it is dirty

isDeleted

public boolean isDeleted(Object obj)

Accessor for whether the passed object is deleted.

Specified by:

isDeleted in interface org.datanucleus.api.ApiAdapter

Parameters:

obj - The object

Returns:

Whether it is deleted

isDetached

public boolean isDetached(Object obj)

Accessor for whether the passed object is detached.

Specified by:

isDetached in interface org.datanucleus.api.ApiAdapter

Parameters:

obj - The object

Returns:

Whether it is detached

isTransactional

public boolean isTransactional(Object obj)

Accessor for whether the passed object is transactional.

Specified by:

isTransactional in interface org.datanucleus.api.ApiAdapter

Parameters:

obj - The object

Returns:

Whether it is transactional

isPersistable

public boolean isPersistable(Object obj)

Method to return if the passed object is persistable using this API. Returns whether the object is an instance of javax.jdo.spi.PersistenceCapable.

Specified by:

isPersistable in interface org.datanucleus.api.ApiAdapter

Parameters:

obj - The object

Returns:

Whether it is persistable

isPersistable

public boolean isPersistable(Class cls)

Utility method to check if the specified class is of a type that can be persisted for this API. Checks that it implements javax.jdo.spi.PersistenceCapable.

Specified by:

isPersistable in interface org.datanucleus.api.ApiAdapter

Parameters:

cls - The class to check

Returns:

Whether the class is persistable

isDetachable

public boolean isDetachable(Object obj)

Method to return if the passed object is detachable using this API. Returns whether the object is an instance of javax.jdo.spi.Detachable.

Specified by:

isDetachable in interface org.datanucleus.api.ApiAdapter

Parameters:

obj - The object

Returns:

Whether it is detachable

getObjectState

public String getObjectState(Object obj)

Accessor for the object state.

Specified by:

getObjectState in interface org.datanucleus.api.ApiAdapter

Parameters:

obj - Object

Returns:

The state ("persistent-clean", "detached-dirty" etc)

makeDirty

public void makeDirty(Object obj,
             String member)

Specified by:

makeDirty in interface org.datanucleus.api.ApiAdapter

getIdForObject

public Object getIdForObject(Object obj)

Method to return the object identity for the passed persistable object. Returns null if it is not persistable, or has no identity.

Specified by:

getIdForObject in interface org.datanucleus.api.ApiAdapter

Parameters:

obj - The object

Returns:

The identity

getVersionForObject

public Object getVersionForObject(Object obj)

Method to return the object version for the passed persistable object. Returns null if it is not persistable, or not versioned.

Specified by:

getVersionForObject in interface org.datanucleus.api.ApiAdapter

Parameters:

obj - The object

Returns:

The version

isValidPrimaryKeyClass

public boolean isValidPrimaryKeyClass(Class pkClass,
                             org.datanucleus.metadata.AbstractClassMetaData cmd,
                             org.datanucleus.ClassLoaderResolver clr,
                             int noOfPkFields,
                             org.datanucleus.metadata.MetaDataManager mmgr)

Utility to check if a primary-key class is valid. Will throw a InvalidPrimaryKeyException if it is invalid, otherwise returning true.

Specified by:

isValidPrimaryKeyClass in interface org.datanucleus.api.ApiAdapter

Parameters:

pkClass - The Primary Key class

cmd - AbstractClassMetaData for the PersistenceCapable class

clr - the ClassLoaderResolver

noOfPkFields - Number of primary key fields

mmgr - MetaData manager

Returns:

Whether it is valid

isSingleFieldIdentity

public boolean isSingleFieldIdentity(Object id)

Accessor for whether the passed identity is a valid single-field application-identity for this API.

Specified by:

isSingleFieldIdentity in interface org.datanucleus.api.ApiAdapter

Returns:

Whether it is valid

isDatastoreIdentity

public boolean isDatastoreIdentity(Object id)

Specified by:

isDatastoreIdentity in interface org.datanucleus.api.ApiAdapter

isSingleFieldIdentityClass

public boolean isSingleFieldIdentityClass(String className)

Checks whether the passed class name is valid for a single field application-identity for this API.

Specified by:

isSingleFieldIdentityClass in interface org.datanucleus.api.ApiAdapter

Parameters:

className - the full class name

Returns:

Whether it is a single field class

getSingleFieldIdentityClassNameForLong

public String getSingleFieldIdentityClassNameForLong()

Accessor for the class name to use for identities when there is a single Long/long field.

Specified by:

getSingleFieldIdentityClassNameForLong in interface org.datanucleus.api.ApiAdapter

Returns:

Class name of identity class

getSingleFieldIdentityClassNameForInt

public String getSingleFieldIdentityClassNameForInt()

Accessor for the class name to use for identities when there is a single Integer/int field.

Specified by:

getSingleFieldIdentityClassNameForInt in interface org.datanucleus.api.ApiAdapter

Returns:

Class name of identity class

getSingleFieldIdentityClassNameForShort

public String getSingleFieldIdentityClassNameForShort()

Accessor for the class name to use for identities when there is a single Short/short field.

Specified by:

getSingleFieldIdentityClassNameForShort in interface org.datanucleus.api.ApiAdapter

Returns:

Class name of identity class

getSingleFieldIdentityClassNameForByte

public String getSingleFieldIdentityClassNameForByte()

Accessor for the class name to use for identities when there is a single Byte/byte field.

Specified by:

getSingleFieldIdentityClassNameForByte in interface org.datanucleus.api.ApiAdapter

Returns:

Class name of identity class

getSingleFieldIdentityClassNameForChar

public String getSingleFieldIdentityClassNameForChar()

Accessor for the class name to use for identities when there is a single Character/char field.

Specified by:

getSingleFieldIdentityClassNameForChar in interface org.datanucleus.api.ApiAdapter

Returns:

Class name of identity class

getSingleFieldIdentityClassNameForString

public String getSingleFieldIdentityClassNameForString()

Accessor for the class name to use for identities when there is a single String field.

Specified by:

getSingleFieldIdentityClassNameForString in interface org.datanucleus.api.ApiAdapter

Returns:

Class name of identity class

getSingleFieldIdentityClassNameForObject

public String getSingleFieldIdentityClassNameForObject()

Accessor for the class name to use for identities when there is a single Object field.

Specified by:

getSingleFieldIdentityClassNameForObject in interface org.datanucleus.api.ApiAdapter

Returns:

Class name of identity class

getTargetClassForSingleFieldIdentity

public Class getTargetClassForSingleFieldIdentity(Object id)

Accessor for the target class for the specified single field application-identity.

Specified by:

getTargetClassForSingleFieldIdentity in interface org.datanucleus.api.ApiAdapter

Parameters:

id - The identity

Returns:

The target class

getTargetClassNameForSingleFieldIdentity

public String getTargetClassNameForSingleFieldIdentity(Object id)

Accessor for the target class name for the specified single field identity.

Specified by:

getTargetClassNameForSingleFieldIdentity in interface org.datanucleus.api.ApiAdapter

Parameters:

id - The identity

Returns:

The target class name

getTargetKeyForSingleFieldIdentity

public Object getTargetKeyForSingleFieldIdentity(Object id)

Accessor for the key object for the specified single field application-identity.

Specified by:

getTargetKeyForSingleFieldIdentity in interface org.datanucleus.api.ApiAdapter

Parameters:

id - The identity

Returns:

The key object

getKeyTypeForSingleFieldIdentityType

public Class getKeyTypeForSingleFieldIdentityType(Class idType)

Accessor for the type of the single field application-identity key given the single field identity type.

Specified by:

getKeyTypeForSingleFieldIdentityType in interface org.datanucleus.api.ApiAdapter

Parameters:

idType - Single field identity type

Returns:

key type

getNewSingleFieldIdentity

public Object getNewSingleFieldIdentity(Class idType,
                               Class pcType,
                               Object value)

Utility to create a new SingleFieldIdentity using reflection when you know the type of the PersistenceCapable, and also which SingleFieldIdentity, and the value of the key.

Specified by:

getNewSingleFieldIdentity in interface org.datanucleus.api.ApiAdapter

Parameters:

idType - Type of SingleFieldIdentity

pcType - Type of the PersistenceCapable

value - The value for the identity (the Long, or Int, or ... etc).

Returns:

Single field identity

Throws:

org.datanucleus.exceptions.NucleusException - if invalid input is received

getNewApplicationIdentityObjectId

public Object getNewApplicationIdentityObjectId(org.datanucleus.ClassLoaderResolver clr,
                                       org.datanucleus.metadata.AbstractClassMetaData acmd,
                                       String value)

Utility to create a new application identity when you know the metadata for the target class, and the toString() output of the identity.

Specified by:

getNewApplicationIdentityObjectId in interface org.datanucleus.api.ApiAdapter

Parameters:

clr - ClassLoader resolver

acmd - MetaData for the target class

value - String form of the key

Returns:

The identity

Throws:

org.datanucleus.exceptions.NucleusException - if invalid input is received

getNewApplicationIdentityObjectId

public Object getNewApplicationIdentityObjectId(Object pc,
                                       org.datanucleus.metadata.AbstractClassMetaData cmd)

Method to create a new object identity for the passed object with the supplied MetaData. Only applies to application-identity cases.

Specified by:

getNewApplicationIdentityObjectId in interface org.datanucleus.api.ApiAdapter

Parameters:

pc - The persistable object

cmd - Its metadata

Returns:

The new identity object

getNewApplicationIdentityObjectId

public Object getNewApplicationIdentityObjectId(Class cls,
                                       Object key)

Method to return a new object identity for the specified class, and key (possibly toString() output).

Specified by:

getNewApplicationIdentityObjectId in interface org.datanucleus.api.ApiAdapter

Parameters:

cls - Persistable class

key - form of the object id

Returns:

The object identity

allowPersistOfDeletedObject

public boolean allowPersistOfDeletedObject()

Whether the API allows (re-)persistence of a deleted object.

Specified by:

allowPersistOfDeletedObject in interface org.datanucleus.api.ApiAdapter

Returns:

Whether you can call persist on a deleted object

allowDeleteOfNonPersistentObject

public boolean allowDeleteOfNonPersistentObject()

Whether the API allows deletion of a non-persistent object.

Specified by:

allowDeleteOfNonPersistentObject in interface org.datanucleus.api.ApiAdapter

Returns:

Whether you can call delete on an object not yet persisted

allowReadFieldOfDeletedObject

public boolean allowReadFieldOfDeletedObject()

Whether the API allows reading a field of a deleted object.

Specified by:

allowReadFieldOfDeletedObject in interface org.datanucleus.api.ApiAdapter

Returns:

Whether you can read after deleting

clearLoadedFlagsOnDeleteObject

public boolean clearLoadedFlagsOnDeleteObject()

Whether the API requires clearing of the fields of an object when it is deleted.

Specified by:

clearLoadedFlagsOnDeleteObject in interface org.datanucleus.api.ApiAdapter

Returns:

Whether to clear loaded fields at delete

getDefaultCascadePersistForField

public boolean getDefaultCascadePersistForField()

Returns the default cascade-persist. JDO defaults to persisting by reachability.

Specified by:

getDefaultCascadePersistForField in interface org.datanucleus.api.ApiAdapter

Returns:

The default value for cascade-persist (true)

getDefaultCascadeUpdateForField

public boolean getDefaultCascadeUpdateForField()

Returns the default cascade-update setting. JDO defaults to updating by reachability.

Specified by:

getDefaultCascadeUpdateForField in interface org.datanucleus.api.ApiAdapter

Returns:

The default cascade-update (true)

getDefaultCascadeDeleteForField

public boolean getDefaultCascadeDeleteForField()

Returns the default cascade-delete setting. JDO defaults to not deleting by reachability (unless using delete dependent)

Specified by:

getDefaultCascadeDeleteForField in interface org.datanucleus.api.ApiAdapter

Returns:

The default cascade-delete (false)

getDefaultCascadeRefreshForField

public boolean getDefaultCascadeRefreshForField()

Returns the default cascade-refresh setting.

Specified by:

getDefaultCascadeRefreshForField in interface org.datanucleus.api.ApiAdapter

Returns:

The default cascade-refresh (false)

getDefaultDFGForPersistableField

public boolean getDefaultDFGForPersistableField()

Specified by:

getDefaultDFGForPersistableField in interface org.datanucleus.api.ApiAdapter

getDefaultFactoryProperties

public Map getDefaultFactoryProperties()

Method to return the default factory properties for this API.

Specified by:

getDefaultFactoryProperties in interface org.datanucleus.api.ApiAdapter

Returns:

The default props

getUserExceptionForException

public RuntimeException getUserExceptionForException(String msg,
                                            Exception e)

Convenience method to return a user exception appropriate for this API.

Specified by:

getUserExceptionForException in interface org.datanucleus.api.ApiAdapter

Parameters:

msg - The message

e - The cause

Returns:

The JDO exception

getDataStoreExceptionForException

public RuntimeException getDataStoreExceptionForException(String msg,
                                                 Exception e)

Convenience method to return a datastore exception appropriate for this API.

Specified by:

getDataStoreExceptionForException in interface org.datanucleus.api.ApiAdapter

Parameters:

msg - The message

e - Any root cause exception

Returns:

The exception

getApiExceptionForNucleusException

public RuntimeException getApiExceptionForNucleusException(org.datanucleus.exceptions.NucleusException ne)

Specified by:

getApiExceptionForNucleusException in interface org.datanucleus.api.ApiAdapter

getCopyOfPersistableObject

public Object getCopyOfPersistableObject(Object obj,
                                org.datanucleus.state.ObjectProvider op,
                                int[] fieldNumbers)

Specified by:

getCopyOfPersistableObject in interface org.datanucleus.api.ApiAdapter

copyFieldsFromPersistableObject

public void copyFieldsFromPersistableObject(Object pc,
                                   int[] fieldNumbers,
                                   Object pc2)

Specified by:

copyFieldsFromPersistableObject in interface org.datanucleus.api.ApiAdapter

copyPkFieldsToPersistableObjectFromId

public void copyPkFieldsToPersistableObjectFromId(Object pc,
                                         Object id,
                                         org.datanucleus.store.fieldmanager.FieldManager fm)

Specified by:

copyPkFieldsToPersistableObjectFromId in interface org.datanucleus.api.ApiAdapter