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/******************************************************************
* CreateGroup.java (for HDF5 tutorial lesson 8)
*
* -- Creating and closing a group
* (a java conversion from h5_crtgrp.c)
*
******************************************************************/
import ncsa.hdf.hdf5lib.*;
import ncsa.hdf.hdf5lib.exceptions.*;
public class CreateGroup
{
public static void main(String []argv)
{
final String FILE = "group.h5";
int file_id = -1; // file identifier
int group_id = -1; // group identifier
int status = -1;
// Create a new file using default properties.
file_id = H5Fcreate_wrap (FILE, HDF5Constants.H5F_ACC_TRUNC,
HDF5Constants.H5P_DEFAULT,
HDF5Constants.H5P_DEFAULT);
// Create a group named "/MyGroup" in the file.
group_id = H5Gcreate_wrap (file_id, "/MyGroup", 0);
// Close the group.
status = H5Gclose_wrap (group_id);
// Close the file.
status = H5Fclose_wrap (file_id);
}
// Help function for creating a new file
public static int H5Fcreate_wrap (String name, int flags,
int create_id, int access_id)
{
int file_id = -1; // file identifier
try
{
// Create a new file using default file properties.
file_id = H5.H5Fcreate (name, flags, create_id, access_id);
}
catch (HDF5Exception hdf5e)
{
System.out.println
("CreateGroup.H5Fcreate_wrap() with HDF5Exception: "
+ hdf5e.getMessage());
}
catch (Exception e)
{
System.out.println
("CreateGroup.H5Fcreate_wrap() with other Exception: "
+ e.getMessage());
}
return file_id;
}
// Help function for creating a group named "/MyGroup" in the file.
public static int H5Gcreate_wrap (int loc_id, String name, int size_hint)
{
int group_id = -1; // group identifier
try
{
// Create a group
group_id = H5.H5Gcreate (loc_id, name, size_hint);
}
catch (HDF5Exception hdf5e)
{
System.out.println
("CreateGroup.H5Gcreate_wrap() with HDF5Exception: "
+ hdf5e.getMessage());
}
catch (Exception e)
{
System.out.println
("CreateGroup.H5Gcreate_wrap() with other Exception: "
+ e.getMessage());
}
return group_id;
}
// Help function for closing the group
public static int H5Gclose_wrap (int group_id)
{
int status = -1;
try
{
// Close the group
status = H5.H5Gclose (group_id);
}
catch (HDF5Exception hdf5e)
{
System.out.println
("CreateGroup.H5Gclose_wrap() with HDF5Exception: "
+ hdf5e.getMessage());
}
catch (Exception e)
{
System.out.println
("CreateGroup.H5Gclose_wrap() with other exception: "
+ e.getMessage());
}
return status;
}
// Help function for terminating access to the file.
public static int H5Fclose_wrap (int file_id)
{
int status = -1;
try
{
// Terminate access to the file.
status = H5.H5Fclose (file_id);
}
catch (HDF5Exception hdf5e)
{
System.out.println
("CreateGroup.H5Fclose_wrap() with HDF5Exception: "
+ hdf5e.getMessage());
}
catch (Exception e)
{
System.out.println
("CreateGroup.H5Fclose_wrap() with other exception: "
+ e.getMessage());
}
return status;
}
}
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