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JPA Interface EntityManager Interface used to interact with the persistence context. An EntityManager instance is associated with a persistence context. A persistence context is a set of entity instances in which for any persistent entity identity there is a unique entity instance

JPA Annotation Embeddable Target: TYPE Implemented Interfaces: Annotation Specifies a class whose instances are stored as an intrinsic part of an owning entity and share the identity of the entity. Each of the persistent properties or fields of the embedded object is mapped to the database table

JDO Constructor in javax.jdo. identity .CharIdentity CharIdentity (   Class pcClass,    Character key ) Constructor with class and key. Parameters: pcClass - the target class key - the key Since: JDO 1.0

JDO Method in javax.jdo. identity .CharIdentity char getKey () Return the key. Return: the key Since: JDO 1.0

JDO Constructor in javax.jdo. identity .CharIdentity CharIdentity () Constructor only for Externalizable. Since: JDO 1.0

JDO Method in javax.jdo. identity .ByteIdentity void readExternal (   ObjectInput in ) Read this object. Read the superclass first. Parameters: in - the input Since: JDO 1.0

JDO Method in javax.jdo. identity .ByteIdentity void writeExternal (   ObjectOutput out ) Write this object. Write the superclass first. Parameters: out - the output Since: JDO 1.0

JDO Constructor in javax.jdo. identity .CharIdentity CharIdentity (   Class pcClass,    char key ) Constructor with class and key. Parameters: pcClass - the target class key - the key Since: JDO 1.0

JDO Method in javax.jdo. identity .ByteIdentity String toString () Return the String version of the key. Return: the key. Since: JDO 1.0

JDO Method in javax.jdo. identity .ByteIdentity byte getKey () Return the key. Return: the key Since: JDO 1.0

JDO Method in javax.jdo. identity .ByteIdentity boolean equals (   Object obj ) Determine if the other object represents the same object id. Parameters: obj - the other object Return: true if both objects represent the same object id Since: JDO 1.0

JDO Static Method in javax.jdo.JDOHelper Object getTransactionalObjectId (   Object pc ) Return a copy of the JDO identity associated with the parameter instance. Parameters: pc - the PersistenceCapable instance. Return: a copy of the ObjectId of the parameter instance as modified

JDO Static Method in javax.jdo.JDOHelper Object[] getObjectIds (   Object[] pcs ) Get object ids for an array of instances. For each instance in the parameter, the getObjectId method is called. This method returns one identity instance for each element in the parameter. The order

JDO Static Method in javax.jdo.JDOHelper Collection getObjectIds (   Collection pcs ) Get object ids for a collection of instances. For each instance in the parameter, the getObjectId method is called. This method returns one identity instance for each element in the parameter

JDO Annotation Attribute in javax.jdo.annotations.DatastoreIdentity String customStrategy default "" Custom strategy to use to generate the value for the identity . If customStrategy is non-empty, then strategy must be UNSPECIFIED. Since: JDO 2.1

JDO Annotation Attribute in javax.jdo.annotations.DatastoreIdentity Column [] columns default {} The column(s) making up the datastore identity . Since: JDO 2.1

JDO Annotation Attribute in javax.jdo.annotations.DatastoreIdentity String column default "" Name of the column for the datastore identity Since: JDO 2.1

JDO Annotation Attribute in javax.jdo.annotations.DatastoreIdentity IdGeneratorStrategy strategy default IdGeneratorStrategy.UNSPECIFIED Strategy to use when generating datastore identities Since: JDO 2.1

JDO Method in javax.jdo.FetchGroup int hashCode () Return the hashCode for this instance. The hash code should combine both the class and fetch group name. The hash codes for two equal instances must be identical . Return: the hash code Since: JDO 2.2

JDO Method in javax.jdo.FetchGroup boolean equals (   Object other ) Return whether this instance is equal to the other. The equals method must compare the class for identity and the fetch group name for equality. Return: whether this instance is equal to the other Since: JDO 2.2

FetchGroup are ignored. Removed FetchGroup s become unscoped. Match is based on identical class

where an identity field is null. Since: JDO 2.0 Public Constructors JDONullIdentityException

JDO Enum IdentityType java.lang.Object ∟  java.lang.Enum ∟  javax.jdo.annotations.IdentityType Enumeration of the identity type values. Since: JDO 2.1 Enum Constants APPLICATION Since: JDO 2.1 DATASTORE Since: JDO 2.1 NONDURABLE Since: JDO 2.1 UNSPECIFIED Since: JDO 2.1 Public Static

as makeTransientAll(Object[] pcs). The affected instance(s) lose their JDO identity

as makeTransientAll(Object[] pcs). The affected instance(s) lose their JDO identity and are no longer

as makeTransientAll(Collection pcs). The affected instance(s) lose their JDO identity

makeTransient(Object pc). The affected instance(s) lose their JDO identity and are no longer associated

JDO Method in javax.jdo.PersistenceManager void makeTransientAll (   Collection pcs ) Make a Collection of instances transient, removing them from management by this PersistenceManager . The instances lose their JDO identity and they are no longer associated with any

JDO Method in javax.jdo.PersistenceManager void makeTransientAll (   Object... pcs ) Make an array of instances transient, removing them from management by this PersistenceManager . The instances lose their JDO identity and they are no longer associated with any PersistenceManager

JDO Method in javax.jdo.PersistenceManager void makeTransient (   Object pc ) Make an instance transient, removing it from management by this PersistenceManager . The instance loses its JDO identity and it is no longer associated with any PersistenceManager . The state of fields

an object representation of a single field identity key Return: the corresponding persistent instance Since: JDO 2.0

JDO Enum IdGeneratorStrategy java.lang.Object ∟  java.lang.Enum ∟  javax.jdo.annotations.IdGeneratorStrategy Enumeration of the id generator strategy values. Since: JDO 2.1 Enum Constants IDENTITY Since: JDO 2.1 INCREMENT Since: JDO 2.1 NATIVE Since: JDO 2.1 SEQUENCE Since: JDO 2.1

JDO Method in javax.jdo. identity .SingleFieldIdentity Class getTargetClass () Return the target class. Return: the target class. Since: JDO 2.0

JDO Constructor in javax.jdo. identity .SingleFieldIdentity SingleFieldIdentity () Constructor only for Externalizable. Since: JDO 2.0

JDO Method in javax.jdo. identity .SingleFieldIdentity Object getKeyAsObject () Return the key as an Object. The method is synchronized to avoid race conditions in multi-threaded environments. Return: the key as an Object. Since: JDO 2.0

JDO Method in javax.jdo. identity .SingleFieldIdentity String getTargetClassName () Return the target class name. Return: the target class name. Since: JDO 2.0

JDO Method in javax.jdo. identity .ShortIdentity void writeExternal (   ObjectOutput out ) Write this object. Write the superclass first. Parameters: out - the output Since: JDO 1.0

JDO Method in javax.jdo.spi.StateInterrogation Object getTransactionalObjectId (   Object pc ) Return a copy of the JDO identity associated with the parameter instance. Instances unknown by the implementation return null . Parameters: pc - the instance. Return: a copy

JDO Method in javax.jdo. identity .ShortIdentity void readExternal (   ObjectInput in ) Read this object. Read the superclass first. Parameters: in - the input Since: JDO 1.0

JDO Method in javax.jdo. identity .ShortIdentity short getKey () Return the key. Return: the key Since: JDO 1.0

JDO Constructor in javax.jdo. identity .ShortIdentity ShortIdentity () Constructor only for Externalizable. Since: JDO 1.0

JDO Method in javax.jdo. identity .ShortIdentity boolean equals (   Object obj ) Determine if the other object represents the same object id. Parameters: obj - the other object Return: true if both objects represent the same object id Since: JDO 1.0

JDO Method in javax.jdo. identity .ShortIdentity String toString () Return the String form of the key. Return: the String form of the key Since: JDO 1.0

JDO Constructor in javax.jdo. identity .ShortIdentity ShortIdentity (   Class pcClass,    short key ) Constructor with class and key. Parameters: pcClass - the class key - the key Since: JDO 1.0

JDO Constructor in javax.jdo. identity .ShortIdentity ShortIdentity (   Class pcClass,    String str ) Constructor with class and key. Parameters: pcClass - the class str - the key Since: JDO 1.0

JDO Constructor in javax.jdo. identity .ShortIdentity ShortIdentity (   Class pcClass,    Short key ) Constructor with class and key. Parameters: pcClass - the class key - the key Since: JDO 1.0

JDO Method in javax.jdo. identity .StringIdentity void readExternal (   ObjectInput in ) Read this object. Read the superclass first. Parameters: in - the input Since: JDO 1.0

JDO Method in javax.jdo. identity .StringIdentity boolean equals (   Object obj ) Determine if the other object represents the same object id. Parameters: obj - the other object Return: true if both objects represent the same object id Since: JDO 1.0

JDO Method in javax.jdo. identity .StringIdentity String toString () Return the String form of the key. Return: the String form of the key Since: JDO 1.0

JDO Method in javax.jdo. identity .StringIdentity void writeExternal (   ObjectOutput out ) Write this object. Write the superclass first. Parameters: out - the output Since: JDO 1.0