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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 files COPYING and Copyright.html. COPYING can be found at the root *
+ * of the source code distribution tree; Copyright.html can be found at the *
+ * root level of an installed copy of the electronic HDF5 document set and *
+ * is linked from the top-level documents page. It can also be found at *
+ * http://hdfgroup.org/HDF5/doc/Copyright.html. If you do not have *
+ * access to either file, you may request a copy from help@hdfgroup.org. *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/************************************************************
+ This example shows how to create intermediate groups with
+ a single call to H5Gcreate.
+ ************************************************************/
+package examples.groups;
+
+import hdf.hdf5lib.H5;
+import hdf.hdf5lib.HDF5Constants;
+import hdf.hdf5lib.callbacks.H5O_iterate_cb;
+import hdf.hdf5lib.callbacks.H5O_iterate_t;
+import hdf.hdf5lib.structs.H5O_info_t;
+
+import java.util.ArrayList;
+
+public class H5Ex_G_Intermediate {
+
+ private static String FILE = "H5Ex_G_Intermediate.h5";
+
+ private void CreateGroup() throws Exception {
+
+ long file_id = -1;
+ long group_id = -1;
+ long gcpl_id = -1;
+
+ try {
+ // Create a new file_id using the default properties.
+ file_id = H5.H5Fcreate(FILE, HDF5Constants.H5F_ACC_TRUNC, HDF5Constants.H5P_DEFAULT,
+ HDF5Constants.H5P_DEFAULT);
+
+ // Create group_id creation property list and set it to allow creation of intermediate group_ids.
+ gcpl_id = H5.H5Pcreate(HDF5Constants.H5P_LINK_CREATE);
+ H5.H5Pset_create_intermediate_group(gcpl_id, true);
+
+ /*
+ * Create the group_id /G1/G2/G3. Note that /G1 and /G1/G2 do not exist yet. This call would cause an error
+ * if we did not use the previously created property list.
+ */
+ group_id = H5
+ .H5Gcreate(file_id, "/G1/G2/G3", gcpl_id, HDF5Constants.H5P_DEFAULT, HDF5Constants.H5P_DEFAULT);
+ // Print all the objects in the file_ids to show that intermediate group_ids have been created.
+ System.out.println("Objects in the file_id:");
+
+ // H5O_iterate_t iter_data = null;
+ H5O_iterate_t iter_data = new H5O_iter_data();
+ H5O_iterate_cb iter_cb = new H5O_iter_callback();
+
+ H5.H5Ovisit(file_id, HDF5Constants.H5_INDEX_NAME, HDF5Constants.H5_ITER_NATIVE, iter_cb, iter_data);
+ }
+ catch (Exception e) {
+ e.printStackTrace();
+ }
+ finally {
+ // Close and release resources.
+ if (gcpl_id >= 0)
+ H5.H5Pclose(gcpl_id);
+ if (group_id >= 0)
+ H5.H5Gclose(group_id);
+ if (file_id >= 0)
+ H5.H5Fclose(file_id);
+ }
+ }
+
+ public static void main(String[] args) {
+ try {
+ (new H5Ex_G_Intermediate()).CreateGroup();
+ }
+ catch (Exception ex) {
+ ex.printStackTrace();
+ }
+ }
+
+ private class idata {
+ public String link_name = null;
+ public int link_type = -1;
+
+ idata(String name, int type) {
+ this.link_name = name;
+ this.link_type = type;
+ }
+ }
+
+ private class H5O_iter_data implements H5O_iterate_t {
+ public ArrayList<idata> iterdata = new ArrayList<idata>();
+ }
+
+ private class H5O_iter_callback implements H5O_iterate_cb {
+ public int callback(long group, String name, H5O_info_t info, H5O_iterate_t op_data) {
+ idata id = new idata(name, info.type);
+ ((H5O_iter_data) op_data).iterdata.add(id);
+
+ System.out.print("/"); /* Print root group in object path */
+
+ // Check if the current object is the root group, and if not print the full path name and type.
+
+ if (name.charAt(0) == '.') /* Root group, do not print '.' */
+ System.out.println(" (Group)");
+ else if (info.type == HDF5Constants.H5O_TYPE_GROUP)
+ System.out.println(name + " (Group)");
+ else if (info.type == HDF5Constants.H5O_TYPE_DATASET)
+ System.out.println(name + " (Dataset)");
+ else if (info.type == HDF5Constants.H5O_TYPE_NAMED_DATATYPE)
+ System.out.println(name + " (Datatype)");
+ else
+ System.out.println(name + " (Unknown)");
+
+ return 0;
+ }
+ }
+
+}