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Hibernate Criteria and composite key

 
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I have a hbm mapped bean with a composite key as id and the composite key is constructed using another class, a foriegn key and a column of String datatype. The mapped java class gets the id as the composite key by extending another class.

Now i want to create Criteria object based on the composite key. how can it be done?
Urgent suggestions required please..

my hbm file:


Im getting error here.. it tells that there is no such property in the EntityAlternateId class.. SO please suggest what shud be done..
 
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