Hi geotools-devel,
Apologies if I should be posting this elsewhere.
I am hitting an error/exception when running a program that writes and reads a
reasonably large number (hundreds) of shapefiles.
The error message is:
WARNING: Could not aquire ESRI(tm) Shapefiles
(*.shp):java.lang.NullPointerException
java.lang.NullPointerException
at
org.geotools.data.shapefile.files.ShpFiles.findExistingFile(ShpFiles.java:210)
at org.geotools.data.shapefile.files.ShpFiles.init(ShpFiles.java:183)
at org.geotools.data.shapefile.files.ShpFiles.<init>(ShpFiles.java:139)
at
org.geotools.data.shapefile.ShapefileDataStoreFactory.createDataStore(ShapefileDataStoreFactory.java:184)
at
org.geotools.data.shapefile.ShapefileDataStoreFactory.createDataStore(ShapefileDataStoreFactory.java:303)
at
org.geotools.data.FileDataStoreFinder.getDataStore(FileDataStoreFinder.java:95)
at
org.geotools.data.FileDataStoreFinder.getDataStore(FileDataStoreFinder.java:69)
I am using GeoTools 12.1, Maven and Netbeans.
The program will get past the part where this error is thrown if I read/write
fewer shapefiles previously. (And so as a work around I can split up my
processing into smaller bits and run these to get the output I want, but that
is not ideal.)
I think the problem is something to do with streams perhaps not being finalised
and closed and that the program is running out of handles of some stripe.
I have thought to check the GeoTools source file logic for closing all the
streams in shapefile writing. To do this I have created a fork of GeoTools in
GitHub and built things locally with Maven so that I have a copy of the
GeoTools source java files.
I am thinking also to set up a new testing project in Netbeans so I can debug
the program by going into the GeoTools source files. Maybe it is sensible to do
this all in one Netbeans project...
BTW, I add the data from each shapefile into its own Layer which is added to a
MapContent. After I have the image I want I then predispose and dispose of each
Layer and dispose of the MapContent.
So that is where I am with this, I just thought I post this message before I
went any further in case anyone has time to give me some advice.
What I have discovered might be a known issue and I expect there is a issue
tracker that I could look at to know, but I am a bit unsure of where the right
place to look is.
Anyway, thanks for GeoTools.
Best wishes,
Andy
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