hi,
problem: after hibernate cached a set of objects, i have problems with comparing:

Session1:
--
group = hibSess.load(XBO_CLASS, "12345");
groups.add(group);
--

Session2:
--
group = hibSess.load(XBO_CLASS, "12345");
if (groups.contains(group)) {
logger.debug("works!");
}
--


When starting my Application this works fine, when invoking this method the second time, it doesn't!

the follwing works fine all the time:
--
group = hibSess.load(XBO_CLASS, "12345");
Iterator i = groups.iterator();
while (i.hasNext()) {
Group workaround = (Group) i.next();
if (groups.contains(group)) {
logger.debug("works!");
}
}


s.th. because of lazy-init? I do not want to turn it off.
a bug?

thanks, marie

How does your equal, hasCode look like?

XBGroup extends XinityBaseObject

class XinityBaseObject {
...
public boolean equals(Object o) {
if (!(o instanceof XinityBaseObject))
return false;

String idThis = getUid();
String idO = ((XinityBaseObject)o).getUid();

if (idThis != null) {
return idThis.equals(idO);
} else if (idO != null) {
return false;
} else {
throw new IllegalStateException ("id is null! can't compare objects");
}
}
}

I did not overwrite hashCode(). I can't check wether this is the problem at the moment (no access to actual code).
Indeed, the debugger shows diffrent JVM identities of the group as reference and the group within the Collection. But he should use the equals-method, should't he?
If I implement the hashCode(), would s.th. like "return this.getUid()" be enough? What if the id is null? Than I can't tell the hashCode. Is throwing the IllegalStateException ok?

thank you

Of course you have to implement hashCode. Your Set ist most likely a HashSet ...