Re: Java netcdf error

• To: Christopher Golden <golden@xxxxxxxxxxxxxx>, support-netcdf-java <support-netcdf-java@xxxxxxxxxxxxxxxx>
• Subject: Re: Java netcdf error
• From: John Caron <caron@xxxxxxxxxxxxxxxx>
• Date: Thu, 31 Oct 2002 12:57:01 -0700

Hi Christopher:

the problem is the _FillValue attribute empty string:

   char staticIds(maxStaticIds, totalIdLen);
    :_FillValue = "";

I made this fix to ucar.netcdf.Attribute ~line 531:

        Number
        getNumericValue(int index)
        {
          if (index >= data.length())
            return new Integer(0);
          else
            return new Integer(data.charAt(index));
        }

can you patch the source yourself (or modify file)? i will add fix to next 
release.


Christopher Golden wrote:

Hello!  You had written to Darien Davis in response to her query
about a netcdf/Java problem we're seeing at FSL.

You wrote:

 > it may be a bug that's been fixed. what is date of jar file? send me
 > netcdf file and i'll check it with latest.

I tried the following versions of the netcdf/Java libraries:

    version 1:           Worked perfectly with our files.

    version 2:           Threw an exception when creating
                         an instance of NetcdfFile.

    version 2.1 beta:    Same as with version 2.

The JAR file I used for version 2 is dated 8/22/02:

   ftp://ftp.unidata.ucar.edu/pub/netcdf-java/netcdf2All.jar

and the one I used for version 2.1 is dated 10/25/02:

   ftp://ftp.unidata.ucar.edu/pub/netcdf-java/v2.1/netcdf2All.jar

I've included one of the netcdf files that cause the
following exception to be thrown at construction time:

  java.lang.StringIndexOutOfBoundsException: String index out of range: 0
        at java.lang.String.charAt(Unknown Source)
        at ucar.netcdf.StringAttrVal.getNumericValue(Attribute.java:534)
        at ucar.netcdf.StringAttrVal.getNumericValue(Attribute.java:539)
        at ucar.netcdf.Attribute.getNumericValue(Attribute.java:248)
        at ucar.netcdf.NetcdfFile$V1CharacterIo.fill(NetcdfFile.java:1236)
        at ucar.netcdf.NetcdfFile$V1Io.initFillValue(NetcdfFile.java:1042)
        at ucar.netcdf.NetcdfFile$V1Io.initFillValue(NetcdfFile.java:1054)
        at ucar.netcdf.NetcdfFile$V1Io.<init>(NetcdfFile.java:797)

at ucar.netcdf.NetcdfFile$V1CharacterIo.<init>(NetcdfFile.java:1174)

        at ucar.netcdf.NetcdfFile.V1IoFactory(NetcdfFile.java:1540)
        at ucar.netcdf.NetcdfFile.readV1VarArray(NetcdfFile.java:1618)
        at ucar.netcdf.NetcdfFile.readV1(NetcdfFile.java:1707)
        at ucar.netcdf.NetcdfFile.<init>(NetcdfFile.java:130)
        at ucar.netcdf.NetcdfFile.<init>(NetcdfFile.java:148)
        at ucar.nc2.NetcdfFile.<init>(NetcdfFile.java:56)
        at NetcdfConverter.main(NetcdfConverter.java:16)

This is from Java 1.3 (build 1.3.1_04-b02) for Windows XP,
but I get the same error when running on a Linux machine.

Does this help at all?  We'd prefer to use version 2.x of
the netcdf/Java library if possible, as the interface seems
easier to work with, so we're hoping that we can get it
working with our netcdf files.

Thanks!
Christopher Golden
golden@xxxxxxxxxxxx