Hi,

Just a newbie trying to get my application that used to work, working on my Mac which now has Eclipse 3.3.1.1 installed.

I haven't changed any code or persistence files since running Eclipse 3.3, and am not sure what else has changed other than an upgrade to 3.3.1.1 (have now removed 3.3 so can't immediately go back and test this, but will want to move to 3.3.1.1 anyway.

I am now getting the following error when running this line:
emf = Persistence.createEntityManagerFactory("MyPU", new Properties());
Error
java.lang.NullPointerException
at javax.persistence.Persistence.findAllProviders(Persistence.java:98)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:79)
at LabSysStore.<init>(LabSysStore.java:34)
at LabSysStore.getInstance(LabSysStore.java:27)
at MainWindow.startTest(MainWindow.java:141)
at MainWindow$1.widgetSelected(MainWindow.java:92)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:227)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1495)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1519)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1504)
at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1295)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3350)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2954)
at MainWindow.open(MainWindow.java:57)
at MainWindow.main(MainWindow.java:41)
-------------
Running hibernate 3.2.5
Entity Manager 3.3.1.GA
Annotations 3.3.0.GA

Any pointers appreciated.
Regards
Colin

Ok,

After much mucking around, I found the solution to my problem...

It seems OS X Leopard has broken JPA when used with SWT in my application...

I found that as soon as I added the SWT Jar to my test application I got the previous mentioned error when creating the Entitiy Manager Factory (I have no idea why, and am a bit of a newbie, so don't think I will ever find out why).

After installing old versions of Eclipse (not the problem), I found the Java 6 SE beta that Apple had temporarily available laying around on my external HD (Yay! I would really love to know what Apple is planning with Java... should I stay or should I go now??... but that is another story), installed the beta Java 6, and hey presto, I could now add in my SWT jar and my application works... swap the runtime in eclipse back to version 5 that comes with Leopard, and it breaks again.

Back to the later version of Eclipse, and yip, that works too with the beta Java 6 SE... so... now just have to wait and see when Apple releases version 6 properly so I can continue (or use Windows or Linux...).

Regards
Colin