Of course all feature in layer share the same shema.
An exemple :
* I have some polygone in shape file :
GEOMETRY (MULTYPOILYGONE)
ID (INTEGER)
* I have in datasource (DS1) lot of generic attributes for this polygone
like
ID (INTEGER)
POPULATION (DOUBLE)
MENAGE (DOUBLE)
* in an other datasource (DS2) client attribute
ID (INTEGER)
NB_CUSTOMER (DOUBLE)
NB_CONTRACT ((DOUBLE)
i want to have in the same layer
GEOMETRY (MULTYPOILYGONE) => from shapeFile
ID (INTEGER) => from shapeFile and in
DS1 and DS2
POPULATION (DOUBLE) => from DS1
MENAGE (DOUBLE) => from DS1
NB_CUSTOMER (DOUBLE) => from DS2
NB_CONTRACT ((DOUBLE) => from DS2
I want make some analyse (why not build an other field with computation from
others)
TX_PENETRATION = NB_CUSTOMER / MENAGE
and store TX_PENETRATION in an other datasource.
What is the better way to code this functionality with lesser intrusive
methode?
I want to keep compatibility with project xml file from OJ 1.2D (if it
possible ;-))
Eric
2007/11/4, Paul Austin <[EMAIL PROTECTED]>:
>
> Layers are tied to a feature collection and all features must share the
> same schema.
>
> If you create custom Java code to load the date from each of those sources
> and populate the feature collection with that data then there is no reason
> why you couldn't do what you want. But there is nothing out of the box to do
> this.
>
> What is the use case behind getting the attributes from many places? If
> the geometry and attributes are in a shape file why not load these into one
> of the databases then you can create a view of the tables and load that into
> JUMP?
>
> Paul
>
> Eric Lemesre wrote:
>
> Hi,
>
> It possible to have more than one datasource by layer?
>
> 1 for Geo datasource (a data source for the géometry)
> 1..n data source for attributes
> Exemple :
> * shapeFile for the geometry
> * a flat CSV file for some attribute
> * MysQL database for some other
> * PostgreSQL database for some others.
>
> Eric
>
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