Re: WO5.4: Generics for objectsWithFetchSpecification ???
Re: WO5.4: Generics for objectsWithFetchSpecification ???
- Subject: Re: WO5.4: Generics for objectsWithFetchSpecification ???
- From: Lachlan Deck <email@hidden>
- Date: Mon, 14 Jan 2008 13:11:35 +1100
On 14/01/2008, at 12:53 PM, Mr. Pierre Frisch wrote:
Actually a raw fetch return a
NSArray<NSDictionary<String, ?>>
Ah yes. So does this work for you in EOEditingContext along with the
previous suggestion for the current api?
public NSArray<NSDictionary<String, ?>>
rawObjectsWithFetchSpecification(EOFetchSpecification fetchSpec) {....}
Pierre
--
Pierre Frisch
email@hidden
On Jan 13, 2008, at 15:19, Lachlan Deck wrote:
Slight correction...
On 14/01/2008, at 8:48 AM, Lachlan Deck wrote:
Actually, having thought about it a bit more, I think it's not
such a nice improvement. i.e., it's not the user that determines
what type of object is returned for a raw-row fetch; that's a
function of the framework.
So the only way I can see this moving forward:
* deprecate the flag in EOFetchSpecification
* adjust EOEditingContext as follows...
public NSArray<T> objectsWithFetchSpecification
(EOFetchSpecification<T> fetchSpec) {...}
public NSArray<?> rawObjectsWithFetchSpecification
(EOFetchSpecification fetchSpec) {....}
(Seeing as raw fetches can return an Integer, Long, String,
NSDictionary depending on the query/calculation)
What do you think?
with regards,
--
Lachlan Deck
On 09/01/2008, at 6:13 AM, Mr. Pierre Frisch wrote:
This would be a pretty radical change that would break a lot of
code. At the moment the raw rows is a boolean in the
EOFetchSpecification, I agree that this would be a nice
improvement but are we ready for it?
Pierre
--
Pierre Frisch
email@hidden
On Jan 7, 2008, at 20:03, Mike Schrag wrote:
.... pretend .... you ... never mentioned that?
I suppose your fetch spec would then be
EOFetchSpecification<NSDictionary> and maybe it would just work
out?
ms
On Jan 7, 2008, at 10:04 PM, Mr. Pierre Frisch wrote:
And what do you do with raw rows?
Pierre
--
Pierre Frisch
email@hidden
On Jan 7, 2008, at 7:36, Mike Schrag wrote:
NSArray<MyEO> = ec.objectsWithFetchSpecification(spec,
MyEO.class)
I think generic EOFS would be better ... Passing in Class
objects to fulfill generics always feels a bit like hackery.
It's really cheating -- you're basically casting without
using cast syntax, because you can't enforce that the class
you put in is actually related to the objects of the fetch
spec in any way, so it's as unsafe as an arbitrary cast.
public <T> NSArray<T> objectsWithFetchSpecification
(EOFetchSpecification<T> fetchSpec) { ... }
then
EOFetchSpecification<Person> fetchSpec = ...;
NSArray<Person> people = ec.objectsWithFetchSpecification
(fetchSpec);
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with regards,
--
Lachlan Deck
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