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From: Jeff Higgins <jeff@invalid.invalid>
Newsgroups: comp.lang.java.programmer
Subject: Re: From Hibernate to straight JPA
Date: Sat, 11 Jul 2015 10:56:47 -0400
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On 07/10/2015 02:13 PM, Cecil Westerhof wrote:
> We are asked to change some software. At the moment one of the things
> that has to be replaced is Hibernate. They want to use straight JPA,
> so it is easy to switch from Hibernate, to openJPA, to …
>
> One of the annotations that is used is:
>      @NotEmpty(message = "Field is not filled")
> with the import:
>      import org.hibernate.validator.constraints.NotEmpty;
>
> My college wants to use:
>      @NotNull(message = "Field is not filled")
>      @Size(message = "Field is not filled", min = 1)
>
> I do not like this. It certainly is not DRY. (It is used hundreds of
> times.) I prefer to define our own NotEmpty. But I have never worked
> with annotations. How to do this?
>
> Also what is a good resource to learn about JPA and annotations?
>

Since no response so far I'll throw in my search results.
May be bunk as I'm not a JPA or JavaEE user.

<http://beanvalidation.org/1.1/>
<http://openjpa.apache.org/bean-validation-primer.html>
<http://lmgtfy.com/?q=custom+bean+validation>