[udig-devel] Need help to change the schema and add new attribute types in a new layer

[Jesse Eichar]

Hi Magna,

There is a command that does most of this work for you.

I've made a code snippet at:

http://svn.geotools.org/udig/branches/1.1.x/udig/tutorials/ 
net.refractions.udig.code.examples/src/net/refractions/udig/code/ 
examples/CopyFeatures.java.

Jesse
On Apr 9, 2007, at 8:21 AM, Schmitt, Magna (CIP) wrote:

> Hello:
> I am trying to create a new layer from a group of features from  
> another existing layer but I would like to change the schema from  
> the data store first to add then new attribute types and new  
> attributes to the features. I would appreciate some advice on this.
> So far I have done the following:
>       1) Got the features from an old existing layer
>       2) Got an iterator to get each feature an add them to an  
> array of Features (Features [])
>       3) I used the 'addFeatures' method with a 'FeatureReader'
>       4) created the new Layer (this is just a copy from the old  
> one) (*)
> /******************************************************************/
> (*)//This is the method to create the new layer, it has a lot of  
> deprecated functions.....
>     public void featuresToShapefile(String fileName,Feature[]  
> features) throws Exception{
>         File file=new File(fileName);
>         ShapefileDataStore datastore = new ShapefileDataStore 
> (file.toURL());
>         datastore.createSchema(features[0].getFeatureType());
>          /** file saving*/
>         FeatureStore featureStore = (FeatureStore)  
> (datastore.getFeatureSource());
>         FeatureReader aReader = DataUtilities.reader(features);
>         try {
>              featureStore.addFeatures(aReader);
>          }catch (Exception e) {
>              System.err.println(e.getMessage());
>          }
>
>              /** Adding the generated shape to the current map*/
>              List<IService> shpServiceList = new ServiceFactoryImpl 
> ().aquire(file.toURL());
>
>              /**ArrayList<IGeoResource> LayersList = null;*/
>              for( IService service : shpServiceList ) {
>                  if (service != null) {
>                      if (service.members(null) != null) {
>                          try {                        	
>                              MapFactory.instance().process(null,  
> service.members(null), false);
>                              break;
>                          } catch (Exception e) {
>                              System.err.println(e.getMessage());
>                          }
>
>                      }
>                  }
>              }
>
>
>      }
>
> /*******************************************************************/
> Thank you in advance.
> Magna
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