Hallo,
I already posted this problem previously. Anyway, I figured out what might
be the reason. Still I can't find the solution. I have several polygons and
want to write them to shapefile. The shapefiles along with the attributes I
defined are created, but no features in there. There seems to be a problem
with polygon and multipolygon which I cant figure out. Here is the error
stack trace and code examples. Please help. Thanks steffen.
org.geotools.data.DataSourceException: Could not create out out of provided
feature: My Name
at
org.geotools.data.AbstractFeatureStore.addFeatures(AbstractFeatureStore.java:261)
at test.TSXFootprint2.main(TSXFootprint2.java:126)
Caused by: org.geotools.feature.IllegalAttributeException: illegal attribute
at
org.geotools.feature.DefaultFeature.setAttributes(DefaultFeature.java:309)
at
org.geotools.data.AbstractFeatureStore.addFeatures(AbstractFeatureStore.java:259)
... 1 more
Caused by: java.lang.IllegalArgumentException
at org.geotools.feature.AttributeImpl.setValue(AttributeImpl.java:106)
at
org.geotools.feature.simple.SimpleFeatureImpl.setValue(SimpleFeatureImpl.java:101)
at
org.geotools.feature.simple.SimpleFeatureImpl.setValues(SimpleFeatureImpl.java:107)
at
org.geotools.feature.simple.SimpleFeatureImpl.setValues(SimpleFeatureImpl.java:112)
at
org.geotools.feature.DefaultFeature.setAttributes(DefaultFeature.java:306)
... 2 more
Caused by: org.geotools.feature.IllegalAttributeException:
com.vividsolutions.jts.geom.Polygon is not an acceptable class for the_geom
as it is not assignable from class com.vividsolutions.jts.geom.MultiPolygon
at org.geotools.feature.type.Types.validate(Types.java:534)
at org.geotools.feature.type.Types.validate(Types.java:502)
at org.geotools.feature.AttributeImpl.setValue(AttributeImpl.java:104)
... 6 more
I'm creating a collection of polygons as follows:
for (int j = 0; j <
footprint.length / 2; j++) {
Coordinate coord = new
Coordinate(Double
.parseDouble(footprint[idx + 1]), Double
.parseDouble(footprint[idx]));
idx = idx + 2;
coords[j] = coord;
} // endfor
GeometryFactory gf = new
GeometryFactory();
LinearRing ring =
gf.createLinearRing(coords);
Polygon polygon =
gf.createPolygon(ring, null);
Feature feature =
TYPE.create(new Object[] { polygon,
12, "aname" },
"My Name");
collection.add(feature);
Feature type and collection are defined as:
CoordinateReferenceSystem crs = CRS.decode("EPSG:4326");
AttributeType GEOM =
AttributeTypeFactory.newAttributeType(
"the_geom", Polygon.class, true, null,
null, crs);
AttributeType ID =
AttributeTypeFactory.newAttributeType("IDENT",
Integer.class, false, 14, 0);
AttributeType NAME =
AttributeTypeFactory.newAttributeType("Name",
String.class, true);
FeatureType TYPE = FeatureTypeFactory.newFeatureType(
new AttributeType[] { GEOM, ID, NAME },
"bla");
FeatureCollection collection =
FeatureCollections.newCollection();
Finally I want to write them to a polygon shapefile using:
DataStoreFactorySpi factory = new
ShapefileDataStoreFactory();
Map<String, Object> create = new HashMap<String,
Object>();
create.put("url", out.toURL());
create.put("create spatial index", Boolean.TRUE);
ShapefileDataStore newDataStore = (ShapefileDataStore)
factory
.createNewDataStore(create);
newDataStore.createSchema(TYPE);
newDataStore.forceSchemaCRS(DefaultGeographicCRS.WGS84);
Transaction transaction = new
DefaultTransaction("create");
String typeName = newDataStore.getTypeNames()[0];
FeatureStore featureStore = (FeatureStore) newDataStore
.getFeatureSource(typeName);
featureStore.setTransaction(transaction);
try {
featureStore.addFeatures(collection);
transaction.commit();
} catch (Exception problem) {
problem.printStackTrace();
transaction.rollback();
} finally {
transaction.close();
}
System.exit(0);
--
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