Sorry guys, but I'm trying to understand the cause of this problem.

The first table (USERS) has very simple structure:
CODE (int) PK
NAME (String)

The second table (DATA) has a more complex structure:
DAY (int) PK
CODE (int) PK
VALUE1 (int) ... VALUEn (int) are the data

there id a one-to-many relationship between the first table and the second table, using CODE as the key.

I have developed the bean of my first table (UserDBean) as a simple bean, with two properties (code is an int and name is a String). The id is assigned (all data comes from daily files).

For the second table (DataDBean) I have developed the bean containing all the values... and, for the primary key, I have used a PrimaryKey bean (DataPKBean) following basic directions.

This DataPKBean contains an int property for the DAY and a UserBean property for the CODE.

The DataDBean xml mapping file, contains something like this:
...
<composite-id name="pk" class="...DataPKBean">
<key-property name="day" type="int"/>
<key-many-to-one name="user" column="code"/>
</composite-id>
...

Now in the code that takes care of importing the file, I first check if the user exists in the user table. If does exist i get the user from the db, if not i create a new user with the code/name values i get from my file.

From the file i also get the day. I then create a new DataPKBean by using the day and the userBean.

Then i create a new DataDBean inserting all the values from the file, and I execute a save(dataDBean, dataPKBean).

And that's the problem...

Error:
identifier of an instance of ...DataDBean altered from [hashcode] to [hashcode].

What is strange is that the two hashcodes are exactly the same...

The question is, where is my error...

Thanks in advance
Regards,
Kazuma

That is not the hasCode(), it is the toString().

Looks like your equals() method is broken.

Yes, it is the toString() method that is displayed. just a typo.

I also thought the problem was on the equals() method, but i think that that it is correct. The equals in the PK class is very simple: it checks if the two DAYS (int) are equals. If not it returns false, otherwise it checks the two users by using the equals() method of the userBean that works on the pk of that class (that's an int).

Anyway I will recheck both equals() method, hoping that i made another typo in there...

Anyway, other suggestion?


regards,
Kazuma