Object arrays from list

Myk · **Joined:** Sun Jan 04, 2004 2:46 pm **Posts:** 147

Assume I have a dead simple hibernate object with two fields, ID and Name, ID being an int primary key, Name a string.

I run a query to get all the rows in the table, and use toArray() function of list to return all the objects, modify one of them and flush the session. Presumably hibernate has no way of knowing I have made a change because the objects I'm working on are copies made by the call to toArray(). Is this right and is there a way of getting ALL the hibernate objects from a list so that implicit updates work?

The code.

Code:

List list = session.find( "from MyObjects" );
MyObject[] objects = (MyObject[])list.toArray();
objects[ 0 ].setName();
session.flush();

Is the alternative to iterate and use get( i )?

Cheers.

Myk.

max · **Posted:** Tue Jan 13, 2004 11:34 am

what's wrong with doing l.get(i) ?

and besides i do not think toArray() clones the objects - it just creates a new array and make it's entires point to the actual objects.

michael · **Posted:** Tue Jan 13, 2004 11:40 am

IMHO

Code:

MyObject o = session.createQuery("from MyObject").uniqueResult();
o.setSomething(xxx);

is the most convenient

Myk · **Joined:** Sun Jan 04, 2004 2:46 pm **Posts:** 147

max wrote:

what's wrong with doing l.get(i) ?

and besides i do not think toArray() clones the objects - it just creates a new array and make it's entires point to the actual objects.

Indeed. I assumed that toArray() and eventually System.arrayCopy() would clone the objects but it appears from the native code that just the references are copied.

Cheers guys.

Myk.