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+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group. *
+ * Copyright by the Board of Trustees of the University of Illinois. *
+ * All rights reserved. *
+ * *
+ * This file is part of HDF5. The full HDF5 copyright notice, including *
+ * terms governing use, modification, and redistribution, is contained in *
+ * the COPYING file, which can be found at the root of the source code *
+ * distribution tree, or in https://www.hdfgroup.org/licenses. *
+ * If you do not have access to either file, you may request a copy from *
+ * help@hdfgroup.org. *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+import hdf.hdf5lib.H5;
+import hdf.hdf5lib.HDF5Constants;
+
+/**
+ * <p>
+ * Title: HDF Native Package (Java) Example
+ * </p>
+ * <p>
+ * Description: this example shows how to create HDF5 groups using the
+ * "HDF Native Package (Java)". The example created the group structure:
+ *
+ * <pre>
+ * "/" (root)
+ * g1
+ * g11
+ * g12
+ * g2
+ * g21
+ * g22
+ * </pre>
+ *
+ * </p>
+ */
+public class HDF5GroupCreate {
+ private static String fname = "HDF5GroupCreate.h5";
+
+ private static void CreateGroup()
+ {
+ long file_id = HDF5Constants.H5I_INVALID_HID;
+ long subgroup_id = HDF5Constants.H5I_INVALID_HID;
+ long group_id1 = HDF5Constants.H5I_INVALID_HID;
+ long group_id2 = HDF5Constants.H5I_INVALID_HID;
+
+ // Create a new file using default properties.
+ try {
+ file_id = H5.H5Fcreate(fname, HDF5Constants.H5F_ACC_TRUNC, HDF5Constants.H5P_DEFAULT,
+ HDF5Constants.H5P_DEFAULT);
+ }
+ catch (Exception e) {
+ e.printStackTrace();
+ System.err.println("Failed to create file:" + fname);
+ return;
+ }
+
+ // Create a group in the file.
+ try {
+ if (file_id >= 0) {
+ group_id1 = H5.H5Gcreate(file_id, "g1", HDF5Constants.H5P_DEFAULT, HDF5Constants.H5P_DEFAULT,
+ HDF5Constants.H5P_DEFAULT);
+ if (group_id1 >= 0) {
+ subgroup_id = H5.H5Gcreate(group_id1, "g11", HDF5Constants.H5P_DEFAULT,
+ HDF5Constants.H5P_DEFAULT, HDF5Constants.H5P_DEFAULT);
+ try {
+ if (subgroup_id >= 0)
+ H5.H5Gclose(subgroup_id);
+ }
+ catch (Exception e) {
+ e.printStackTrace();
+ }
+ subgroup_id = H5.H5Gcreate(group_id1, "g12", HDF5Constants.H5P_DEFAULT,
+ HDF5Constants.H5P_DEFAULT, HDF5Constants.H5P_DEFAULT);
+ try {
+ if (subgroup_id >= 0)
+ H5.H5Gclose(subgroup_id);
+ }
+ catch (Exception e) {
+ e.printStackTrace();
+ }
+ }
+ group_id2 = H5.H5Gcreate(file_id, "g2", HDF5Constants.H5P_DEFAULT, HDF5Constants.H5P_DEFAULT,
+ HDF5Constants.H5P_DEFAULT);
+ if (group_id2 >= 0) {
+ subgroup_id = H5.H5Gcreate(group_id2, "g21", HDF5Constants.H5P_DEFAULT,
+ HDF5Constants.H5P_DEFAULT, HDF5Constants.H5P_DEFAULT);
+ try {
+ if (subgroup_id >= 0)
+ H5.H5Gclose(subgroup_id);
+ }
+ catch (Exception e) {
+ e.printStackTrace();
+ }
+ subgroup_id = H5.H5Gcreate(group_id2, "g22", HDF5Constants.H5P_DEFAULT,
+ HDF5Constants.H5P_DEFAULT, HDF5Constants.H5P_DEFAULT);
+ try {
+ if (subgroup_id >= 0)
+ H5.H5Gclose(subgroup_id);
+ }
+ catch (Exception e) {
+ e.printStackTrace();
+ }
+ }
+ }
+ }
+ catch (Exception e) {
+ e.printStackTrace();
+ }
+
+ // Close the groups.
+ try {
+ if (group_id2 >= 0)
+ H5.H5Gclose(group_id2);
+ }
+ catch (Exception e) {
+ e.printStackTrace();
+ }
+ try {
+ if (group_id1 >= 0)
+ H5.H5Gclose(group_id1);
+ }
+ catch (Exception e) {
+ e.printStackTrace();
+ }
+
+ // Close the file.
+ try {
+ if (file_id >= 0)
+ H5.H5Fclose(file_id);
+ }
+ catch (Exception e) {
+ e.printStackTrace();
+ }
+ }
+
+ public static void main(String[] args) { HDF5GroupCreate.CreateGroup(); }
+}