Re: IllegalArgumentException with addVariableAttribute

Hi Mark:

you cant have an attribute with an array of Strings, only arrays of numbers are 
allowed. put it all in one string, and decode it when you read, eg

String v = "one, two";
ncFile.addVariableAttribute("edrmap", "units", v.getBytes());

when you read, you can use java.lang.StringTokenizer to break into tokens:

     Attribute att = edrmapVar.findAttribute("units");
     String val = att.getStringValue(); 
     StringTokenizer st = new StringTokenizer(val, ", ");
     while (st.hasMoreTokens()) {
         println(st.nextToken());
     }


  /**
   * Add an attribute of type Array to the named Variable. Must be in define 
mode.
   *
   * @param String varName: name of attribute. IllegalArgumentException if not 
valid name.
   * @param String attName: name of attribute.
   * @param Object value: must be 1D array of double, float, int, short, char, 
or byte
   */
public void addVariableAttribute(String varName, String attName, Object value) ;



Mark A Ohrenschall wrote:

> Hello,
>
> I'm trying to define an array-valued variable attribute, e.g.,
>
>         ncFile.addVariableAttribute("edrmap", "units", new String [] 
> {"one", "two"});
>
> But I get a run-time error:
>
> Exception in thread "main" java.lang.IllegalArgumentException: Invalid Type: 
> class java.lang.String
>         at ucar.netcdf.Attribute.<init>(Attribute.java:129)
>         at 
> ucar.nc2.NetcdfFileWriteable.addVariableAttribute(NetcdfFileWriteable.java:214)
>         at edrmap.Edrmap.<init>(Edrmap.java:99)
>         at edrmap.Edrmap.main(Edrmap.java:121)
>
> I'm able to pass in an array of ints. The API documentation for 
> addGlobalAttribute includes "Remark: this looks buggy; allowed types 
> unclear." Perhaps this is true for addVariableAttribute as well?
>
> I'm using 2.10 beta of the (Java) netCDF library.
>
> Thanks,
>
> Mark Ohrenschall