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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
Manual
15

JPA Persistable Types

, however, do not have an identity (primary key) of their own which leads to some limitations (e.g ... and arrays and keys and values in maps) are either null values or instances of persistable types. In
Result
15

What is new in ObjectDB 2.0?

ObjectDB 2.0 supports many new features and improvements, including: Most of the features of the new JPA 2.0 and JDO 2.2 APIs. User defined IDs (primary key) and sequences. Support of unlimited index keys size. SQL like queries ("select from ... where ..."). Real non blocking multithreading in
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
JDO Doc
15

Key.column

Annotation Element javax.jdo.annotations.Key String column Name of the column to store the key in. Returns: name of the column to store the key in Default value: "" Since: JDO 2.1