April 2003
Beginner to intermediate
380 pages
12h 25m
English
Content preview from Java Data Objects
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Appendix A. Lifecycle States and Transitions
Table A-1 specifies
the values returned by the JDOHelper
lifecycle state interrogation methods for all the JDO lifecycle
states.
Table A-1. Lifecycle-state interrogation methods
State of instance | isPersistent( ) | isTransactional( ) | isDirty( ) | isNew( ) | isDeleted( ) |
|---|---|---|---|---|---|
Transient | false | false | false | false | false |
Transient-clean | false | true | false | false | false |
Transient-dirty | false | true | true | false | false |
Hollow | true | false | false | false | false |
Persistent-nontransactional | true | false | false | false | false |
Persistent-new | true | true | true | true | false |
Persistent-clean | true | true | false | false | false |
Persistent-dirty | true | true | true | false | false |
Persistent-deleted | true | true | true | false | true |
Persistent-new-deleted | true | true | true | true | true |
Table A-2 and Table A-3 contain the state transitions for every lifecycle state.
Table A-2. Lifecycle-state transitions
Current state | |||||
|---|---|---|---|---|---|
Method | Transient | P-new | P-clean | P-dirty | Hollow |
makePersistent | P-new | unchanged | unchanged | unchanged | unchanged |
deletePersistent | error | P-new-del | P-del | P-del | P-del |
makeTransactional | T-clean | unchanged | unchanged | unchanged | P-clean |
makeNontransactional | error | error | P-nontrans | error | unchanged |
makeTransient | unchanged | error | Transient | error | Transient |
commit withRetainValues = false | unchanged | Hollow | Hollow | Hollow | unchanged |
commit withRetainValues = true | unchanged | P-nontrans | P-nontrans | P-nontrans | unchanged |
rollback with RestoreValues = false | unchanged | Transient | Hollow | Hollow | unchanged |
rollback with RestoreValues = true | unchanged | Transient | P-nontrans | P-nontrans | unchanged |
refresh with active datastore transaction | unchanged ... | ||||
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