Re: [udig-devel] Get PostGISServiceImpl

[Jody Garnett <jody.garnett@xxxxxxxxx>]

I see the difficulty; let me try and help.

You are correct that a new PostGISServiceImpl would be created here; what you need to do is:
1. ask this instance for its ID
2. lookup that ID in the catalog
3. if found use what you found; if not you can add the instance you just made to the catalog and continue

I need to think of a smoother way to generate an ID for a set of parameters :-( On the bright side the PostGISServiceImpl will not do anything until you try and call the resolve method for the first time.

Jody

On Tue, Feb 17, 2009 at 3:20 AM, Alessandro Sferrazza <sferrazza.alessandro@xxxxxxxxx> wrote:

Hi to all,

I need PostGISServiceImpl to execute some query from my postgis db.

I tried this:

PostgisDataStore database;

java.util.Map<String, Serializable> params = new java.util.HashMap<String,
Serializable>();
params.put(PostgisDataStoreFactory.DBTYPE.key, "postgis");
params.put(PostgisDataStoreFactory.HOST.key, "localhost");
params.put(PostgisDataStoreFactory.PORT.key, 5432);
params.put(PostgisDataStoreFactory.SCHEMA.key, "public");
params.put(PostgisDataStoreFactory.DATABASE.key, "xxx");
params.put(PostgisDataStoreFactory.USER.key, "XXX");
params.put(PostgisDataStoreFactory.PASSWD.key, "XXX");

IServiceFactory factory = CatalogPlugin.getDefault().getServiceFactory();
for (IService service : factory.createService(params)) {
       if (service.canResolve(PostgisDataStore.class)) {
               try {
                       database = service.resolve(PostgisDataStore.class, new
NullProgressMonitor());
               } catch (Exception e) {
                       e.printStackTrace();
               }
       }
}

and this

PostgisDataStoreFactory dsf = new PostgisDataStoreFactory();
if (dsf.canProcess(params)) {
try {
       ds = (PostgisDataStore) dsf.createDataStore(params);
} catch (IOException e) {
     msg = e;
     throw e;
}

but that will create a new connection, while I would like to continue using
udig connection.

Thanks in advance for any replies.
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