While creating the mapping file, either we use Java Primitive or Java Wrapper. When I used tool to generate the mapping file for me, it used combination of both primitive and wrapper type. But, which one is good to used from performance point of view and best practice. Could anyone suggest me rule when to use primitive and when to use wrapper. I will definitely go for simple primitive type over wrapper.

Thanks for your time reading my post.

Any thought on this ???

hibernate core doesn't care it uses the same hibernate type for both wrapper and primitive.

the code generator does care though since it is the only way that it can see wether you want primitive or non-primitive.

so technically it only matters if you use codegeneration.