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Hi,

some of my business objects have a lock declared:

private final ReadWriteLock lock = new ReentrantReadWriteLock();

 

When I load such an object, "lock" is set to null which results in some nasty NPEs. Could anyone give me a hint how I should solve this problem?

 

 

Thanks

Johannes

 

Uups - intepreted something wrong: The lock is set, when the object has been loaded.

But when I check the object within a Predicate, the lock is set to "null" (resulting in NPEs when I call a getter).

Please try:

private final transient ReadWriteLock lock = new ReentrantReadWriteLock();

Yes, of course setting the lock "transient" works as expected. But then I have to initialize the lock lazily (using a method). How could I ensure the lock is set after an object has been loaded from the database? Forcing the usage of a constructor?