In our (RCP) client/server application a JAR is packaged on both sides
containing all build time enhanced entities.
Now we have a ManyToMany relationship with a join table defined. When we add
both entities to each other to create a new relationship between two
entities a und b everything works fine on the server side.
But on the client side we get a very strange NullPointerException at a
position we thought a NPE is not possible. Please have a look at our code:
Entitiy A:
public void addB(final B b) {
if (bList == null) {
bList = new ArrayList<B>();
}
if (!bList.contains(b)) {
bList.add(b);
b.addA(this);
}
}
Entity B:
public void addA(final A a) {
if (aList == null) {
aList = new ArrayList<A>(); // this code is executed but aList
is not initialized. Why?
}
if (!aList.contains(a)) { // NullPointerException here!! aList is null!
aList.add(a);
a.addBp(this);
}
}
Does anyone have a hint why this is happening (and on client side only)?
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