I have a situation of one-to-one relationship that I prefer the child class is referred with its ID instead of object on its parent class for the following reason:

When the parent object is retrieved along with the child, two DB trips are need: first to get the parent object and second to get the child object. The child object is a binary image file. To display it on a web page, I need to use a servlet for the task.

My question is whether the Hibernate can take care this situation so that I can't need to do anything manually on child object deletion or replacement or not.

Thanks for your input in advance.

For such case, it might be better without an one-to-one mapping. Having the child object ID as an attribute of the parent will be an favorable approach.