Re: Problem with nj22-18

Donald Denbo wrote:
> John,
>
> OK.  So how would I write a HDF file from nj22?  Or netcdf-4?  Is  that 
> even possible?

no, cant write yet. netcdf-4 format is not finalized (Mar?), but even then it 
will be a while before we have that functionality (harder to write than read).


> Not really interested in rewriting our logging to use log4j,  especially 
> if it is more difficult than Logger.

jdk14 logging seems adequate for client apps.

> Thanks for your help,

sure 

> Don
>
>
> On Jan 30, 2007, at 3:49 PM, John Caron wrote:
>
> > Hi Don:
> >
> >
> > Donald Denbo wrote:
> >
> > > John,
> > >     I have an application for which Groups seem a natural  solution.  
> > > I  have created a small test program to create a file  with two 
> > > groups  then look at the contents as Groups.  While the  file 
> > > construction  seems to go fine, reading back using groups  doesn't 
> > > appear to work.   All the attributes, dimensions, and  variables 
> > > appear only in the root  group.  Attached is my test  program and 
> > > output.  What am I doing wrong?
> >
> >
> > You cant write netcdf files with Groups, that needs the netcdf-4  file 
> > format, which is not ready. Is that what you're doing?
> >
> > >     Other questions:
> > >     1)  where did Variable.isCoordinateVariable() go?  Could I  
> > > convince  you to retain this method?
> >
> >
> > that got removed a while ago. equivilent is  
> > Variable.getCoordinateDimension() != null
> >
> > >     2)  When creating a Variable I have to give it the NetCDF file  
> > > and  Group, yet without explicitly adding the
> > >     variable to the group, it doesn't appear to exist in the nc  
> > > file.   Looking at the code, it looks like the original  declaration 
> > > is always  overridden when adding to a group (which  apparently you 
> > > must do.)
> >
> >
> > The problem is that NetcdfFileWriteable doesnt handle groups, since  
> > you cant actuallly write them. But the constructor is there because  
> > we do create them from non-netcdf files, like HDF5.
> >
> > >     3)  When writing out the data for a group variable I have to  use 
> > > the  NetcdfWriteable.write() method, which doesn't accept any  group  
> > > designation.  To get this to work, I had to write to  "groupName/ 
> > > shortName".  Shouldn't Group have a write method?  Or  better yet,  
> > > shouldn't Variable have the write method?
> >
> >
> > >     4)  I didn't see any example of setting up log4j.  I have been  
> > > using  jdk 1.5 built-in logging.
> >
> >
> > yes, i need to add a bit on work with that, but log4j is  complicated 
> > and i probably will assume people are already using it.  do you want 
> > to switch to it?
> >
> > > Thanks for you time,
> > > Don
> > > /System/Library/Frameworks/JavaVM.framework/Versions/1.5.0/Home/ bin/ 
> > > java -classpath "/Users/dwd/ResultService/NJTest/classes:/usr/ local/ 
> > > java/junit3.8.1/junit.jar:/Developer/Applications/Borland/  
> > > JBuilder2005/JBuilder.framework/lib/unittest.jar:/Users/dwd/  
> > > ResultService/NJTest/lib/netcdf-2.2.18.jar:/Users/dwd/ ResultService/ 
> > > NJTest/lib/nlog4j-1.2.21.jar:/System/Library/ Frameworks/ 
> > > JavaVM.framework/Versions/1.5.0/ Classes/.compatibility/ 
> > > 14compatibility.jar:/System/Library/ Frameworks/JavaVM.framework/ 
> > > Versions/1.5.0/Classes/charsets.jar:/ System/Library/Frameworks/ 
> > > JavaVM.framework/Versions/1.5.0/Classes/ classes.jar:/System/Library/ 
> > > Frameworks/JavaVM.framework/Versions/ 1.5.0/Classes/dt.jar:/System/ 
> > > Library/Frameworks/JavaVM.framework/ Versions/1.5.0/Classes/jce.jar:/ 
> > > System/Library/Frameworks/ JavaVM.framework/Versions/1.5.0/Classes/ 
> > > jconsole.jar:/System/ Library/Frameworks/JavaVM.framework/Versions/ 
> > > 1.5.0/Classes/ jsse.jar:/System/Library/Frameworks/JavaVM.framework/ 
> > > Versions/ 1.5.0/Classes/laf.jar:/System/Library/Frameworks/ 
> > > JavaVM.framework/ Versions/1.5.0/Classes/ui.jar:/System/Library/ 
> > > Frameworks/ JavaVM.framework/Versions/1.5.0/Home/lib/deploy.jar:/ 
> > > System/ Library/Frameworks/JavaVM.framework/Versions/1.5.0/Home/lib/  
> > > dt.jar:/System/Library/Frameworks/JavaVM.framework/Versions/1.5.0/  
> > > Home/lib/ext/apple_provider.jar:/System/Library/Frameworks/  
> > > JavaVM.framework/Versions/1.5.0/Home/lib/ext/dnsns.jar:/System/  
> > > Library/Frameworks/JavaVM.framework/Versions/1.5.0/Home/lib/ext/  
> > > localedata.jar:/System/Library/Frameworks/JavaVM.framework/ Versions/ 
> > > 1.5.0/Home/lib/ext/sunjce_provider.jar:/System/Library/ Frameworks/ 
> > > JavaVM.framework/Versions/1.5.0/Home/lib/ext/ sunpkcs11.jar:/System/ 
> > > Library/Frameworks/JavaVM.framework/ Versions/1.5.0/Home/lib/im/ 
> > > indicim.jar:/System/Library/Frameworks/ JavaVM.framework/Versions/ 
> > > 1.5.0/Home/lib/im/thaiim.jar:/System/ Library/Frameworks/ 
> > > JavaVM.framework/Versions/1.5.0/Home/lib/ jce.jar:/System/Library/ 
> > > Frameworks/JavaVM.framework/Versions/ 1.5.0/Home/lib/plugin.jar:/ 
> > > System/Library/Frameworks/ 
> > > JavaVM.framework/Versions/1.5.0/Home/lib/sa- jdi.jar"   
> > > njtest.CreateNJ22
> > > log4j:WARN No appenders could be found for logger  
> > > (ucar.nc2.NetcdfFile).
> > > log4j:WARN Please initialize the log4j system properly.
> > > Root group
> > >    MaxWaveHeight/type = "first estimate maximum wave height"
> > >    TravelTime/type = "first estimate travel time"
> > >       Latitude = 10;   // (has coord.var)
> > >       Longitude = 10;   // (has coord.var)
> > >       float Latitude(Latitude=10);
> > >       float Longitude(Longitude=10);
> > >       float MaxWaveHeight/maxWH(Latitude=10, Longitude=10);
> > >      :units = "m";
> > >       float TravelTime/tt(Latitude=10, Longitude=10);
> > >      :units = "hours";