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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