About primary key

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JDO Doc
15

getObjectById(cls, key)

Method javax.jdo.PersistenceManager T getObjectById(   Class cls,   Object key ) Looks up the instance of the given type with the given key. Parameters: cls - The type of object to load key ... identity key Returns: the corresponding persistent instance Since: JDO 2.0
JDO Doc
15

getUserObject(key)

Method javax.jdo.PersistenceManager Object getUserObject(   Object key ) Get the value for the specified key from the map of user objects. Parameters: key - the key of the object to be returned Returns: the object Since: JDO 2.0
JDO Doc
15

IntIdentity(pcClass, key)

Constructor javax.jdo.identity.IntIdentity IntIdentity(   Class pcClass,   int key ) Constructor with class and key. Parameters: pcClass - the class key - the key Since: JDO 1.0
JDO Doc
15

IntIdentity(pcClass, key)

Constructor javax.jdo.identity.IntIdentity IntIdentity(   Class pcClass,   Integer key ) Constructor with class and key. Parameters: pcClass - the class key - the key Since: JDO 1.0
JDO Doc
15

LongIdentity(pcClass, key)

Constructor javax.jdo.identity.LongIdentity LongIdentity(   Class pcClass,   Long key ) Constructor with class and key. Parameters: pcClass - the class key - the key Since: JDO 1.0
JDO Doc
15

removeUserObject(key)

Method javax.jdo.PersistenceManager Object removeUserObject(   Object key ) Remove the specified key and its value from the map of user objects. Parameters: key - the key of the object to be removed Since: JDO 2.0
JDO Doc
15

ShortIdentity(pcClass, key)

Constructor 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 Doc
15

StringIdentity(pcClass, key)

Constructor javax.jdo.identity.StringIdentity StringIdentity(   Class pcClass,   String key ) Constructor with class and key. Parameters: pcClass - the class key - the key Since: JDO 1.0
JDO Doc
15

Extension.key

Annotation Element javax.jdo.annotations.Extension String key The key for the extension (required). Returns: the key Since: JDO 2.1
JPA Doc
15

key()

Method javax.persistence.criteria.MapJoin Path key() Create a path expression that corresponds to the map key. Returns: path corresponding to map key Since: JPA 2.0