how to check entity bean state change ?

[design2006]

Dear all,

I have an entity bean which persist to the database, how can i know when the field value of the entity bean has been change ?

Because i want to make the application call to update database only when some of the fields in the entity bean have been change. thanks.



regards,
design

[waynebaylor]

hibernate does most (if not all) of that for you.

[design2006]

what i mean is that say for example,

i have an entity bean which contains two fields name and age,
first time it will render on the front page for user to edit,
so i would like to "save" it only when users actually have change the value. Otherwise just abort it. So how do i track this ? thanks...

[itsme]

you have to code it in the setters of your entity beans and mark the relevant property, which has changed, as a need for an update. additionally you can use a PropertyChangeListener.

\sandor\