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6

javax.persistence.LockModeType

phenomena can occur: P1 (Dirty read): Transaction T1 modifies a row. Another transaction T2 then reads ... on an object, the entity manager must ensure that neither of the following phenomena can occur: P1 (Dirty
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javax.jdo.PersistenceManagerFactory

-clean to persistent-clean or from detached-dirty to persistent-dirty. Parameters: flag - Since: JDO 2.1 ... and the instances revert to transient. Additionally, dirty instances transition to hollow
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makeDirty(pc, fieldName)

Static Method javax.jdo.JDOHelper void makeDirty( Object pc, String fieldName ) Explicitly mark the parameter instance and field dirty. Normally, PersistenceCapable classes are able to detect changes ... - the PersistenceCapable instance. fieldName - the name of the field to be marked dirty. Since: JDO 1.0 See Also: PersistenceCapable.jdoMakeDirty(String fieldName)
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makePersistent(pc)

, then the implementation is not required to mark the corresponding instance dirty. If it cannot determine if changes were made, then it must mark the instance dirty. No consistency checking
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makeDirty(pc, fieldName)

Method javax.jdo.spi.StateInterrogation boolean makeDirty( Object pc, String fieldName ) Explicitly mark the parameter instance and field dirty. Normally, PersistenceCapable classes are able ... of the field to be marked dirty. Since: JDO 2.0 See Also: PersistenceCapable.jdoMakeDirty(String fieldName)
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setCopyOnAttach(flag)

and change their state from detached-clean to persistent-clean or from detached-dirty to persistent-dirty. Parameters: flag - Since: JDO 2.1 See Also: getCopyOnAttach()
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setCopyOnAttach(flag)

from detached-clean to persistent-clean or from detached-dirty to persistent-dirty. Parameters: flag - Since: JDO 2.1 See Also: getCopyOnAttach()
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isDirty(pc)

Method javax.jdo.spi.StateInterrogation Boolean isDirty( Object pc ) Tests whether the parameter instance is dirty. Instances that have been modified, deleted, newly made persistent in the current ... to be non-dirty return Boolean.FALSE. Instances not recognized by the implementation return null
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javax.jdo.Query

that were deleted, specifically not including the number of dependent and embedded instances. Dirty
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deletePersistentAll()

Method javax.jdo.Query long deletePersistentAll() Deletes all the instances of the candidate class that pass the filter. Returns the number of instances of the candidate class that were deleted, specifically not including the number of dependent and embedded instances. Dirty instances of affected

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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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