I have a strange problem with hibernates dirty checking.
In my entitybean ex product i have a getmethod for ex price like

getPrice(){
return this.price*2;
}

Then hibernate thinks this object is dirty and updates the object with the result of this.price*2 but the value of this.price is never changed. All I do is to call the getmethod which have a calculation on the price value before returning. Anyone have simular experience and a workaround for this ?

This occurs because you have your hibernate mapping using the default property access. It assumes that getPrice() will return the value that it loaded for the price property from the database.

Either change the name of your method to something that doesn't imply it is getting the unaltered price, or change your hibernate mapping file to use field level access instead of the default property access.

e.g.
<property name="price" access="field">