19 messages in org.apache.jackrabbit.devRe: Content Object Mapping - jcrom.org
FromSent OnAttachments
David NueschelerFeb 5, 2008 3:47 am 
Alexandru Popescu ☀Feb 5, 2008 4:11 am 
Jukka ZittingFeb 5, 2008 4:16 am 
Christophe LombartFeb 5, 2008 4:43 am 
Alex LukinFeb 5, 2008 4:47 am 
David NueschelerFeb 5, 2008 4:53 am 
IvanLatyshFeb 5, 2008 6:40 am 
Alexandru Popescu ☀Feb 5, 2008 9:20 am 
Alexandru Popescu ☀Feb 5, 2008 9:23 am 
Alex LukinFeb 5, 2008 10:25 am 
Christophe LombartFeb 5, 2008 10:53 am 
Jukka ZittingFeb 5, 2008 11:37 am 
Padraic HannonFeb 5, 2008 11:59 am 
Alex LukinFeb 5, 2008 12:05 pm 
Christophe LombartFeb 5, 2008 12:49 pm 
Alex LukinFeb 5, 2008 1:01 pm 
Alexander KlimetschekFeb 6, 2008 10:54 am 
oggMay 16, 2008 4:06 am 
Jukka ZittingMay 16, 2008 5:09 am 
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Subject:Re: Content Object Mapping - jcrom.orgActions...
From:Alex Lukin (luk@stu.cn.ua)
Date:Feb 5, 2008 10:25:51 am
List:org.apache.jackrabbit.dev

Tuesday 05 February 2008 19:24:16 Alexandru Popescu ☀ написав:

Oops... it looks like I've left something unfinished...

On Feb 5, 2008 7:21 PM, Alexandru Popescu ☀

<the.@gmail.com> wrote:

(to Alex Lukin):

2) JPA is based on relational approach and does not work properly with tree-like structures we use often with JCR

That's partly correct. Indeed the theory of relational storage and tree-based storage are radically different.

However, I do believe that part of the JPA annotations and moreover API can be applied to any Object to X mapping solutions. And as I said: it doesn't need to be 100% pure JPA ;-).

Well, may be. But JPA is not ideal solution for java persistance. It does not
handle right things like this:

class MyNode { List<MyNode> subNodes; .... }

The nature of JCR is tree. The naure of tree processing is recursion. JPA does not have any word about it. It has a lot of words about relational
stuff instead. So use of JPA with JCR may be very misleading. -- SY, Alex Lukin RIPE NIC HDL: LEXA1-RIPE