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