[udig-devel] adding and modifying a new feature

[Jesse Eichar]

Ah yes.  I don't think that will work.  You see when a feature is  
created it is assigned a more or less random ID.  However when it is  
added to a data store it is assigned a different id.  Then to make  
matters worse some datastores (WFS) assign it a new ID when a commit  
occurs.

For the wfs datastore I put some code that keeps track of added  
features so that after a commit the same FID can be used.  But for  
trunk we are planning on changing the events so that the new FIDs are  
broadcast so interested parties can update the FIDs they are holding  
to be accurate after the commit.

I think on the AddFeatureCommand there are methods for either getting  
the new feature or at least the FID of the new feature.

Yeah, there it is.  getNewFeature().

Good luck :)

Jesse
On 6-May-08, at 11:11 AM, andrea antonello wrote:

> I'm trying to add programmatically a new feature to a layer and to
> modify it as new coordinates come to make the geometry of that feature
> evolve.
> What I am doing is:
>
> - the first time create a feature and add it to the layer with
>                UndoableMapCommand createAddFeatureCommand =  
> EditCommandFactory
>                        .getInstance 
> ().createAddFeatureCommand(feature, layer);
>                 
> layer.getMap().sendCommandASync(createAddFeatureCommand);
>
> - having kept the reference to that feature, every time new
> coordinates come, I add the coordinate to the geometry of the feature
> I created at the first round and modify on the layer with the
> following:
>
>                UndoableMapCommand[] cmds = new UndoableMapCommand[3];
>                cmds[0] = EditCommandFactory.getInstance()
>                        .createSetEditFeatureCommand(feature, layer);
>                cmds[1] = EditCommandFactory.getInstance()
>                        .createSetGeomteryCommand(feature, layer,  
> geometry);
>
>                layer.getMap().sendCommandASync(cmds[0]);
>                layer.getMap().sendCommandASync(cmds[1]);
>
> Should this work?
>
> Ciao,
> Andrea
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