Ok, I shall try my shapefile against geotools 2.7.
I will report back my findings.
Thank you,
Alessandro Ferrucci
On Tue, Mar 15, 2011 at 7:27 PM, Jody Garnett <[email protected]>wrote:
> uDig 1.2.1 is using the latest GeoTools; which from your testing appears
> more capable!
> --
> Jody Garnett
>
> On Wednesday, 16 March 2011 at 8:45 AM, Alessandro Ferrucci wrote:
>
> Hello,
> I have a question:
>
> I'm using geotools 2.6.5 to read a shapefile, code is below:
>
> Map map = new HashMap();
> map.put("url", shpfilef.toURI().toURL());
> DataStore store = DataStoreFinder.getDataStore(map);
> String[] typeNames = store.getTypeNames();
> String typeName = typeNames[0];
> FeatureSource<SimpleFeatureType, SimpleFeature> featureSource =
> store.getFeatureSource(typeName);
> FeatureCollection<SimpleFeatureType, SimpleFeature> collection
> = featureSource.getFeatures();
> FeatureIterator<SimpleFeature> iterator =
> collection.features();
> int numfeatures = 0;
> while (iterator.hasNext()) {
> numfeatures++;
> SimpleFeature feature = iterator.next();
> int a= Integer.parseInt((String) feature.getAttribute(1));
> int b= Integer.parseInt((String) feature.getAttribute(2));
> int c= Integer.parseInt((String) feature.getAttribute(3));
> Geometry geom = (Geometry) feature.getDefaultGeometry();
> }
> System.out.println("num features: " + numfeatures);
>
> On certain shapefiles I get the following error
>
> Mar 15, 2011 6:37:43 PM
> org.geotools.data.shapefile.indexed.IndexedShapefileDataStore queryQuadTree
> SEVERE: null
> java.nio.BufferUnderflowException
> at java.nio.Buffer.nextGetIndex(Buffer.java:480)
> at java.nio.DirectByteBuffer.getDouble(DirectByteBuffer.java:902)
> at
> org.geotools.data.shapefile.shp.PolygonHandler.readCoordinates(PolygonHandler.java:234)
> at
> org.geotools.data.shapefile.shp.PolygonHandler.read(PolygonHandler.java:147)
> at
> org.geotools.data.shapefile.shp.ShapefileReader$Record.shape(ShapefileReader.java:109)
> at
> org.geotools.data.shapefile.ShapefileAttributeReader.next(ShapefileAttributeReader.java:154)
> at
> org.geotools.data.shapefile.indexed.IndexedShapefileAttributeReader.next(IndexedShapefileAttributeReader.java:122)
> at
> org.geotools.data.FIDFeatureReader.next(FIDFeatureReader.java:98)
> at
> org.geotools.data.FIDFeatureReader.next(FIDFeatureReader.java:55)
> at
> org.geotools.data.store.FeatureReaderIterator.next(FeatureReaderIterator.java:71)
> at
> org.geotools.data.store.FeatureReaderIterator.next(FeatureReaderIterator.java:41)
> at
> org.geotools.feature.collection.DelegateFeatureIterator.next(DelegateFeatureIterator.java:58)
> at Main.main(Main.java:42)
>
> I understand this to be possibly the cause of a slightly corrupted
> shapefile? However if I then add the shapefile that caused the above error,
> to uDig (version 1.2.1) uDig displays it without any problems.
>
> another weird thing, is that if I tell uDig to export this layer to a new
> shapefile (essentially creating a copy of the shapefile).
>
> then the code I have above does not bomb out on that copy of the shapefile
> anymore (and the number of features it reads is the same as that of uDig, so
> I know I'm getting all the features).
>
> so it seems like uDig is FIXING the shapefile... but how could uDig read
> the shapefile and my code above NOT read the shapefile, since they are both
> essentially using the exact same code base? Are there more checks I need
> to put in place that uDig performs?
> Thanks,
> --
> Signed,
> Alessandro Ferrucci
>
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>
>
--
Signed,
Alessandro Ferrucci
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