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4

flush()

Method javax.jdo.PersistenceManager void flush() Flushes all dirty, new, and deleted instances to the data store. It has no effect if a transaction is not active. If a datastore transaction is active, this method synchronizes the cache with the datastore and reports any exceptions. If an optimistic
4

getObjectsById(oids, validate)

Method javax.jdo.PersistenceManager Collection getObjectsById( Collection oids, boolean validate ) Return the objects with the given oids. Parameters: oids - the oids of the objects to return validate - if true, the existance of the objects in the datastore will be validated. Returns: the objects
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getObjectIdClass(cls)

Method javax.jdo.PersistenceManager Class getObjectIdClass( Class cls ) Return the Class that implements the JDO Identity for the specified PersistenceCapable class. The application can use the returned Class to construct a JDO Identity instance for application identity PersistenceCapable classes
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getObjectsById(oids, validate)

Method javax.jdo.PersistenceManager Object[] getObjectsById( Object[] oids, boolean validate ) Return the objects with the given oids. Parameters: oids - the oids of the objects to return validate - if true, the existance of the objects in the datastore will be validated. Returns: the objects
4

getObjectsById(oids)

Method javax.jdo.PersistenceManager Collection getObjectsById( Collection oids ) Return the objects with the given oids. This method is equivalent to calling getObjectsById(Collection, boolean) with the validate flag true. Parameters: oids - the oids of the objects to return Returns: the objects
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getObjectById(oid)

Method javax.jdo.PersistenceManager Object getObjectById( Object oid ) Looks up the instance corresponding to the specified oid. This is equivalent to getObjectById(oid, true); Parameters: oid - The object id of the object to load Returns: the corresponding persistent instance Since: JDO 1.0
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getManagedObjects()

Method javax.jdo.PersistenceManager Set getManagedObjects() Get the objects managed by this persistence manager. Returns: the objects Since: JDO 2.1
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getCopyOnAttach()

Method javax.jdo.PersistenceManager boolean getCopyOnAttach() Gets the copyOnAttach setting. Returns: the copyOnAttach setting. Since: JDO 2.1 See Also: setCopyOnAttach(boolean)
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flush()

Method javax.jdo.PersistenceManager void flush() Flushes all dirty, new, and deleted instances to the data store. It has no effect if a transaction is not active. If a datastore transaction is active, this method synchronizes the cache with the datastore and reports any exceptions. If an optimistic
4

getDetachAllOnCommit()

Method javax.jdo.PersistenceManager boolean getDetachAllOnCommit() Gets the detachAllOnCommit setting. Returns: the detachAllOnCommit setting. Since: JDO 2.0 See Also: setDetachAllOnCommit(boolean)

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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