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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;
+ }
+}