Hi.
What might happen if it is the geometry that is null in the database?
It is rather common situation sometimes, it is quite possible that we
know for example parcel attributes beforehand and we should just
digitise the borders afterwards.
The DB Query plugin (or should those plugins be called as extensions?)
from
http://jumpdbqplugin.sourceforge.net/
is building a default geometry is database does not return a real one.
Geometry is for example like
POLYGON ((0.1 0.1, -0.1 0.1, -0.1 -0.1, 0.1 -0.1, 0.1 0.1))
This works fine for reading from the database, I am not clever
enough even to think about what happens if database access is
read/write.
WFS is another datasource that can return attributes without geometry.
-Jukka Rahkonen-
Larry Becker wrote:
> > But what if the initial value for a certain attribute was indeed
NULL???
>>
>> Data coming from a database can contain NULLs...
> In that case, I believe the attribute object[] array would contain an
object that
> references null and not null reference, if that distinction is clear.
They should
> still be typed Objects as in:
> String column1 = null; Double column2 = null;
> Larry
>> On Tue, Apr 28, 2009 at 3:29 PM, Paolo Rizzi <g...@oicom.com
<mailto:g...@oicom.com> > wrote:
>> In the code inside my previous post I used the value "this" as a
flag
>> but maybe that was bad!!! That way the BasicFeature could live
forever,
>> or maybe not if garbage collectors are smarter these days...???
>> Anyway the point was to use a reference to any already existing
Object
>> as a flag, so to not create a new Object for the purpose. But any
>> Object, existing or created anew would do. Obviously if
>> initialialization never ends for any reason, both the mods array and
the
>> flag Objects it points to, are never released.
>> Bye
>> Paolo
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