Re: [ojb-users] Does getCollectionByQuery() with QueryByExample argument works?

[Jakob B. <jbr...@ho...>]

hi stefan,

QueryByExample is actually a query by identity.
try new QueryByCriteria(exampleObj) this will build a QueryByExample using
all non null values.
this feature is not perfect (can't handel null i query, what about
primitives ) and it's supported by QueryFactory.

do you know how toplink handles this ?

hth jakob

----- Original Message -----
From: <Ste...@eu...>
To: <obj...@li...>
Sent: Wednesday, June 05, 2002 11:01 AM
Subject: Re: [ojb-users] Does getCollectionByQuery() with QueryByExample
argument works?



Yes,  getObjectByQuery() work OK but it returns only one object, but I want
to find Collection of object that fulfill conditions defined by
"ExampleObject".
We found it very flexibly to use "ObjectByExample" idea in our previous
project (Toplink) to simplify finders API.

Tnx, Stefan



|--------+---------------------------------------------->
|        |          "Jakob Braeuchi"                    |
|        |          <jbr...@ho...>             |
|        |          Odeslal:                            |
|        |          obj...@li...urc|
|        |          eforge.net                          |
|        |          04.06.2002 19:11                    |
|        |                                              |
|--------+---------------------------------------------->

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  |       Komu:   <obj...@li...>,
<Ste...@eu...>           |
  |       Kopie:
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  |       Předmět:     Re: [ojb-users] Does getCollectionByQuery() with
QueryByExample argument    |
  |       works?
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hi stefan,

have you tried getObjectByQuery() ?

hth
jakob
----- Original Message -----
From: <Ste...@eu...>
To: <obj...@li...>
Sent: Tuesday, June 04, 2002 5:50 PM
Subject: [ojb-users] Does getCollectionByQuery() with QueryByExample
argument works?


> What I do wrong?
>
> I call find() method with persistant object with id attribute (primary
key)
> set only (all other attributes are null or 0). There is no unittest with
> such functionality.
>
>   public Collection find(Object object) {
>     Query query = new QueryByExample(object);
>     return broker.getCollectionByQuery(query);
>   }
>
> It returns collection of all objects from DB.
>
> Tnx  Stefan
>
> P.S. I have ojb 0.9
>
>
> _______________________________________________________________
>
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_______________________________________________________________

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_______________________________________________________________

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