I'm trying to use geotools (version 2.3.3) to create shapefiles. These
shapefiles contain at least one polygon, along with a set of attributes in
the .dbf file for each polygon. I noticed that when the attributes contain
unusual characters like the degree symbol (°), I got this exception in
geotools:
[14:42:52,830 ERROR WriteShapeUtil] Error to write features to
shapefile:
java.io.IOException: Current fid index is null, next must be called before
remove
at
org.geotools.data.shapefile.indexed.IndexedFidWriter.write(IndexedFidWriter.java:192)
at
org.geotools.data.shapefile.indexed.IndexedShapefileDataStore$Writer.write(IndexedShapefileDataStore.java:1766)
at
org.geotools.data.shapefile.indexed.IndexedShapefileDataStore$Writer.close(IndexedShapefileDataStore.java:1578)
at
org.geotools.data.TransactionStateDiff.applyDiff(TransactionStateDiff.java:252)
at
org.geotools.data.TransactionStateDiff.commit(TransactionStateDiff.java:139)
at
org.geotools.data.DefaultTransaction.commit(DefaultTransaction.java:181)
..........
My code to create shapefiles is as follows:
//attrNames are the attribute names/labels
//attrTypes are the attribute type, and they are all Strings
//the createShapeFile method creates the ShapefileDataStore by setting the
shapefile name,
// setting the CRS, and creating the schema
ShapefileDataStore shapeStoreData = createShapeFile( file, geomType,
attrNames, attrTypes, epsgCode );
//pointList is the polygon points
//values are values of the attributes, and the degree symbol is contained in
one of these values
//the createPolygonFeatures method creates a FeatureCollection.
//One of the features in the FeatureCollection contains a value with the
degree symbol in it
FeatureCollection polygonCollection = createPolygonFeatures(
shapeStoreData.getSchema(), pointList,
attrNames, values );
FeatureCollection collection = FeatureCollections.newCollection();
collection.addAll( polygonCollection );
writeToShapefile( shapeStoreData, collection );
The writeToShapefile method is copied below:
public void writeToShapefile( ShapefileDataStore data, FeatureCollection
collection ) throws JShapeException
{
String featureName = data.getTypeNames()[0];// there is only
one in a
shapefile
DefaultTransaction transaction = null;
FeatureStore store = null;
try
{
// Create the DefaultTransaction Object
transaction = new DefaultTransaction();
// Tell it the name of the shapefile it should look for
in our DataStore
store = (FeatureStore) data.getFeatureSource(
featureName );
// Then set the transaction for that FeatureStore
store.setTransaction( transaction );
}
catch ( IOException io_e )
{
logger.error( "I/O exception: ", io_e );
throw new JShapeException( "I/O exception: " +
io_e.getMessage() );
}
try
{
store.addFeatures( collection );
transaction.commit(); //Got an exception at this point
transaction.close();
}
catch ( ...........
Any help is much appreciated!
--
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