Question

One of my goals is to create an engine that will set values in pojo object from JPA objects dynamically using reflection. One of the matching criteria is, that the field names should match.

I was successfully able to implement this for two pojo objects. But when I tried using JPA objects as one of the object parameter, it didn’t work. Based on my research I found out that the method Class.getDeclaredFields() , does not give me the name of the field but the getter/setter method name of member variable for JPA objects.

Can anyone please give me a lead or direction as in where/what should I look to accomplish this task?

Answer 1

JPA providers will often use dynamic proxy classes of your concrete JPA classes, so you have no guarantee of the field names in the proxy. The only guarantee about a proxy is that the methods are the same. Use a debugger to inspect the runtime class of the JPA class instances that you’re trying to use and you’ll see the problem.

The best you’ll be able to do is use reflection to call methods on JPA-returned objects.

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_{All that aside, I don’t really see why you’d need to POJO-ify an entity class anyway, since an entity is primarily an annotated… POJO.}