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From Brian McCallister <mccallis...@forthillcompany.com>
Subject Re: [1.1 Proposal] Introduce an IdentityFactory
Date Tue, 20 Jan 2004 21:32:08 GMT
+1 Much needed feature

-Brian

On Jan 20, 2004, at 4:01 PM, Armin Waibel wrote:

> Hi all,
>
> I propose to introduce an IdentityFactory class by a service method in 
> PB (think some users made a similar proposal in the past):
>
> PB.serviceIdentityFactory
>
> IdentityFactory will simplify the creation of Identity objects and 
> will make find by primary key much easier.
>
> Currently user have to create a Identity object on its own and do
> (assume we use a single PK per class)
>
> Object[] pkValueArray = new Object[]{new Integer(4711)};
> Class topLevelClass = broker.getTopLevelClass(realClass);
> Identity oid = new Identity(realClass, topLevelClass, pkValueArray)
> Object result = broker.getObjectByIdentity(Identity oid)
>
> The creation of the Identity object is a mess!
> With the new service class same example look like
>
> Identity oid = broker.serviceIdentityFactory.buildIdentity(realClass, 
> new Integer(4711));
> Object result = broker.getObjectByIdentity(Identity oid)
>
> Any comments?
>
> regards,
> Armin
>
> public interface IdentityFactory
> {
>     Identity buildIdentity(Object obj);
>
>     Identity buildIdentity(ClassDescriptor cld, Object obj);
>
>     Identity buildIdentity(Class realClass, Class topLevelClass, 
> String[] pkFieldName, Object[] pkValues);
>
>     Identity buildIdentity(Class realClass, String[] fieldName, 
> Object[] pkValues);
>
>     Identity buildIdentity(Class realClass, Object pkValue);
> }
>
>
>
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