[Gvsig_english] gvSIG DefinitionExpression

[Jorge Gaspar Sanz Salinas]

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El 08/07/11 13:51, Flavio Pompermaier escribió:
> Thank you all for the quick responses..that was (unfortunaltely) what
> I was looking for..It would be a very nice feature to have in
> gvSIG..:(
> 
> Best regards,
> Flavio
> 

Hi Flavio,

We've been talking about this stuff and there are two ways to implement
this on gvSIG 2.x. One is easy but dirty and the other one elegant but
harder to implement.

The first one is to add a filter condition to every provider so the user
could go into the new advanced parameters and place there the filter
expression before adding the new data.

The other is to implement a new transformation data to filter based on
an expression. The problem is that right now the transforms are intended
to change on the fly the schema: like at table joins or events layer.
The nice thing is that transforms are applied to a datasource without
modifying it.

The second would be a great contribution if someone is interested on
transforms...

Best regards


- -- 
Jorge Gaspar Sanz Salinas
gvSIG Team at Prodevelop
Technical Collaborations Manager
http://www.gvsig.org
http://www.gvsig.com
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