Re: [netcdf-java] NetcdfFileWriteable setName() is deprecated, but i don't know what else to use

Hi  Xiaoshen:

The problem with this approach is that it doesnt copy the data to the 
new file. Is that your intention?

On 6/7/2010 9:10 AM, address@hidden wrote:
> John:
>
> Thank you for your reply. I re-tested and it works. Following is a
> simple junit test(NetCDFTest.java), which opens an existing netcdf
> file("input.nc", attached with this email), modify the variable values,
> then dump out to a different netcdf file("output.nc"). I have converted
> both netcdf files to readable text format and confirmed the Java code
> indeed has changed the variable values.
>
> Again, I am worried about NetcdfFileWriteable setName(String
> newFilePathAndName) method, since it is deprecated. My code relies on
> this method. If netcdf library delete this method in the future release,
> my code will break. The API for this method suggests using
>
> NetcdfFileWriteable.createNew(String filename)
>
> I don't think it is equivalent, since createNew() creates a blank netcdf
> object. I have to "copy" everything from input.nc to output.nc.
>
> Thank you very much for your help.
>
> Xiaoshen
>
> <NetCDFTest.java>
>
> public class NetCDFTest extends TestCase
> {
>
>      public void testModifyNCfile() throws IOException, InvalidRangeException
>      {
>          final String inputFileName = "./output/input.nc";
>
>          final String outputFileName = "./output/output.nc";
>
>          final NetcdfFileWriteable writableFile =
> NetcdfFileWriteable.openExisting(inputFileName);
>
>          writableFile.setRedefineMode(true);
>
>          final Variable ffgVariable = writableFile.findVariable("FFG");
>          final Array ffgVarArray = ffgVariable.read();
>          final Index ffgIndex = ffgVarArray.getIndex();
>
>          writableFile.setName(outputFileName);
> //setName() is deprecated. If commented out this method, "input.nc" will
> be overwritten
>          writableFile.create();
>
>          //re-set variable FFG values
>          ffgVarArray.setDouble(ffgIndex.set(0), 10.1);
>          ffgVarArray.setDouble(ffgIndex.set(1), 10.2);
>          ffgVarArray.setDouble(ffgIndex.set(2), 10.3);
>          ffgVarArray.setDouble(ffgIndex.set(3), 10.4);
>
>          writableFile.write("FFG", ffgVarArray);
>
>          writableFile.flush();
>
>          writableFile.close();
>
>      }
>
> }
>
> </NetCDFTest.java>
>
> ==>  input.nc text file<==
> netcdf input {
> dimensions:
>          timeStep = 4 ;
> variables:
>          double FFG(timeStep) ;
>                  FFG:start_time = "2010-01-12 12:00:00" ;
>
> // global attributes:
>                  :global_start_time = "2010-01-12 12:00:00" ;
> data:
>
>   FFG = 1.1, 2.2, 3.3, 4.4 ;
> }
>
> ==>  output.nc text file<==
> netcdf output {
> dimensions:
>          timeStep = 4 ;
> variables:
>          double FFG(timeStep) ;
>                  FFG:start_time = "2010-01-12 12:00:00" ;
>
> // global attributes:
>                  :global_start_time = "2010-01-12 12:00:00" ;
> data:
>
>   FFG = 10.1, 10.2, 10.3, 10.4 ;
> }
>
>
> ----- Original Message -----
> From: John Caron<address@hidden>
> Date: Friday, June 4, 2010 4:27 pm
> Subject: Re: [netcdf-java] NetcdfFileWriteable setName() is deprecated,
> but i don't know what else to use
>
>    
> > Hi Xiaoshen :
> >
> > Are you sure that works? Can you send a small test case that does
> > that?
> > thanks
> >
> > John
> >
> > On 6/4/2010 10:52 AM, Xiaoshen Li wrote:
> >      
> > > Hi,
> > >
> > > I have a problem to achieve my goal. My goal is: opening an
> > >        
> > existing
> >      
> > > netcd file, make some modification to it, then output to a
> > >        
> > different
> >      
> > > netcdf file. My java code is like the following:
> > >
> > >         final NetcdfFileWriteable writableFile =
> > > NetcdfFileWriteable.openExisting(inputNetcdfFileName); //open an
> > > existing input netcdf file. writableFile is not blank, it has
> > > everything defined in the input netcdf file.
> > >
> > >         writableFile.setRedefineMode(true);
> > >
> > >        //did some modification, like changing variable values, etc
> > >
> > >         writableFile.setName(outputFileName); //i want to write
> > >        
> > out to
> >      
> > > a different netcdf file, i don't want to overwrite the original
> > >        
> > input
> >      
> > > netcdf file
> > >
> > > The code above works fine for me. However, setName() is *Deprecated.
> > > *
> > >
> > >
> > >       setName
> > >
> > > public void *setName*(java.lang.String filename)
> > >
> > >     *Deprecated.* /use NetcdfFileWriteable.createNew(String
> > >        
> > filename);/>
> >      
> > >     Set the filename of a new file to be created: call before calling
> > >     create().
> > >
> > >     *Parameters:*
> > >         |filename| - name of new file to create.
> > >
> > > /NetcdfFileWriteable.createNew(String filename) /is different
> > >        
> > thing.
> >      
> > > It returns a blank netcdf file object.
> > >
> > > final NetcdfFileWriteable writableFile =
> > > NetcdfFileWriteable.createNew(fileName); //now, writableFile is
> > >        
> > blank>
> >      
> > > How can I avoid using deprecated setName() to achieve my goal?
> > >        
> > Thank
> >      
> > > you very much.
> > >
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