[udig-devel] DXF Plugin/FeatureCollection Geometry

["Edwards, Wendy A ERDC-CERL-IL Contractor" <Wendy.A.Edwards@xxxxxxxxxxxxxxxxxxx>]

Hi, it looks like the code in one of the open source products I've been using
is creating a FeatureCollection where the individual Feature objects do have
the default Geometry set, but the FeatureCollection itself does not.  Here's
the code - it's part of a package to convert between JTS FeatureCollection
and Geotools FeatureCollection.  It's freely available at
http://soldin.de/about/2004-jump_plugins/ - I'm using the gt2jump.readwrite .

---------------------------------------
public static org.geotools.feature.FeatureCollection
convert(com.vividsolutions.jump.feature.FeatureCollection jump_features)
throws Exception{
		// GT2 feature collection
		org.geotools.feature.FeatureCollection gt2_features = 
	
org.geotools.feature.FeatureCollections.newCollection();
		
		for (Iterator iter = jump_features.iterator();
iter.hasNext();) {
			Feature jump_feature = (Feature) iter.next();
			
			// get jump_schema for feature
			FeatureSchema jump_fschema =
jump_feature.getSchema();
			// create a feature schema for GT2
			org.geotools.feature.FeatureTypeFactory
gt2_ftype_factory =
org.geotools.feature.FeatureTypeFactory.newInstance(Integer.toString(jump_fea
ture.getID()));
			// create an array of GT2 Attribs
			Object[] gt2_attribs = new
Object[jump_fschema.getAttributeCount()];
			
			for (int i = 0; i<jump_fschema.getAttributeCount();
i++){
				
				// building schema
				AttributeType a_type =
jump_fschema.getAttributeType(i);
				
				org.geotools.feature.AttributeType gt2_a_type
= 
	
org.geotools.feature.AttributeTypeFactory.newAttributeType(
	
jump_fschema.getAttributeName(i),
	
a_type.toJavaClass());
				gt2_ftype_factory.addType(gt2_a_type);
				
				// adding attrib
				gt2_attribs[i] =
jump_feature.getAttribute(i);
						
			}
			
			//System.out.println(gt2_ftype_factory.toString());
			org.geotools.feature.FeatureType gt2_ftype =
gt2_ftype_factory.getFeatureType();
			
			// create GT2 feature
			String fid = Integer.toString(jump_feature.getID());
			org.geotools.feature.Feature gt2_feature =
gt2_ftype.create(gt2_attribs,fid);
			
			// add it to collection
			gt2_features.add(gt2_feature);
			
		}
		
		return gt2_features;
	}
---------------------------------------

Also, the setDefaultGeometry function doesn't work - I went through the
geotools source (org.geotools.feature.DefaultFeatureCollection.java) and
found the relevant code.

	public void setDefaultGeometry(Geometry geometry) throws
IllegalAttributeException {
		throw new IllegalAttributeException("Not Supported");
	}