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From Joerg von Frantzius <joerg.von.frantz...@artnology.com>
Subject Re: fetch group question
Date Mon, 15 Oct 2007 16:07:51 GMT
A workaround could be to define a fetch group for every single field in
the .jdo file, and then assembling the desired combination at runtime (I
remember somebody having done that before).

Karan Malhi schrieb:
> Sorry,
>
> The code should read as:
> Query query = pm.newQuery(Person.class);
> FetchGroup criteria = new FetchGroup(Person.class);
> // or I could also do
> // FetchGroup criteria = new FetchGroup(query);
>
> criteria.add("firstName").add("lastName");
> query.getFetchPlan().clearGroups().addGroup(criteria);
>
> On 10/14/07, Karan Malhi <karan.malhi@gmail.com> wrote:
>   
>> For a PC object like
>>
>> class Person{
>>     String firstName;
>>     String lastName;
>>     String address;
>> }
>>
>> Currently I can set a named fetch-group in the .jdo file and add it in
>> the fetch plan. It would've been great if I would've been able to do
>> the following:
>>
>> Query query = pm.newQuery(Person.class);
>> FetchGroup criteria = new FetchGroup();
>> criteria.add("firstName").add("lastName");
>> query.getFetchPlan().clearGroups().addGroup(fg);
>>
>> Is there a way I can do something like the above (dynamic fetch
>> groups) with the current spec?
>> If not, do you think something like this is worth adding to the future
>> release of JDO?
>> Would be great to have something like this.
>>
>> I know that I could project some fields using:
>> query.setResult("firstName, lastName");
>> query.setResultClass(Value.class);
>>
>> public class Value{
>>    String firstName;
>>    String lastName;
>> }
>>
>> But the problem here is that Value is not really a PC class.
>>
>> Any help would be appreciated.
>>
>> Thanks!
>>
>> --
>> Karan Singh Malhi
>>
>>     
>
>
>   


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