[hibernate-dev] HHH-9440 Support for Java 8: parameter names

[Lovro Pandzic]

Thanks.
After a quick look, one of key points is
Loader#doQueryAndInitializeNonLazyCollections?
This is the point where the entities get loaded and properties set during
the load from database?

On Thu, May 5, 2016 at 9:46 PM, Steve Ebersole <steve at hibernate.org> wrote:

> Look at usages of Instantiator interface
>
>
> On Thu, May 5, 2016, 2:08 PM Lovro Pandzic <lovro.pandzic at gmail.com>
> wrote:
>
>> Sorry for late reply.
>>
>>
>> Well you mentioned Java 8 parameters names in the subject.  I have no
>>> idea what "Java 8 parameter names" might mean outside of the support added
>>> in Java 8 for named parameter binding.  So if that's not what you mean,
>>> what do you mean?
>>>
>>> Based on some of your other replies, perhaps you are confusing
>>> "parameter names" (PreparedStatement) and "column names" (ResultSet)?
>>>
>>
>> I mean the Java 8 Parameter Names API -
>> https://docs.oracle.com/javase/tutorial/reflect/member/methodparameterreflection.html
>> .
>> So the basic idea is, if you know to which fields to inject the value,
>> you also know into which parameter the value should be injected.
>>
>> I must say I'm not familiar with Hibernate ORM codebase so any clues
>> where to start looking would be helpful. Right now I'm searching for usages
>> of Class#newInstance and starting from there.
>>
>> On Thu, Mar 31, 2016 at 2:05 PM, Steve Ebersole <steve at hibernate.org>
>> wrote:
>>
>>> On Mon, Mar 28, 2016 at 1:22 PM Lovro Pandzic <lovro.pandzic at gmail.com>
>>> wrote:
>>>
>>>>  I am confused how you are "mind mapping" PreparedStatement parameters
>>>>> and entity construction into the same conversation.  We are not
>>>>> instantiating entities based on PreparedStatement parameters....
>>>>>
>>>>
>>>> I'm not sure I understand you, I haven't mentioned PreparedStatement
>>>> parameters anywhere.
>>>>
>>>
>>> Well you mentioned Java 8 parameters names in the subject.  I have no
>>> idea what "Java 8 parameter names" might mean outside of the support added
>>> in Java 8 for named parameter binding.  So if that's not what you mean,
>>> what do you mean?
>>>
>>> Based on some of your other replies, perhaps you are confusing
>>> "parameter names" (PreparedStatement) and "column names" (ResultSet)?
>>>
>>>
>>> What you propose is to delay the entity instantiation and create the
>>>>> entity instance from after we have the hydrated state.
>>>>
>>>>
>>>> Yes, the requirement for this to work is that before calling
>>>> constructor you have all arguments and target parameter names available.
>>>>
>>>
>>> Right, which precludes lazy loading; which is my point on the Jira.
>>>
>>
>>