[udig-devel] adding and modifying a new feature

[andrea antonello]

Hi Jesse,

> 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().

I think by keeping the reference to the feature that is first added, I
achieve the same as the getNewFeature method. Right?

My problem is that the added features are not visible, also if I do a
redraw, they do not appear, even if they are present in the table
view.

Is this somehow related to the features sometimes not appearing while editing?

Andrea


>
>  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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> > http://udig.refractions.net
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> >
>
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