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+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group. *
+ * 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. *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/************************************************************
+ This example shows how to iterate over group members using
+ H5Gget_obj_info_all.
+ ************************************************************/
+
+import java.util.EnumSet;
+import java.util.HashMap;
+import java.util.Map;
+
+import hdf.hdf5lib.H5;
+import hdf.hdf5lib.HDF5Constants;
+import hdf.hdf5lib.structs.H5O_token_t;
+
+public class H5Ex_G_Iterate {
+ private static String FILENAME = "groups/h5ex_g_iterate.h5";
+ private static String DATASETNAME = "/";
+
+ enum H5O_type {
+ H5O_TYPE_UNKNOWN(-1), // Unknown object type
+ H5O_TYPE_GROUP(0), // Object is a group
+ H5O_TYPE_DATASET(1), // Object is a dataset
+ H5O_TYPE_NAMED_DATATYPE(2), // Object is a named data type
+ H5O_TYPE_NTYPES(3); // Number of different object types
+ private static final Map<Integer, H5O_type> lookup = new HashMap<Integer, H5O_type>();
+
+ static
+ {
+ for (H5O_type s : EnumSet.allOf(H5O_type.class))
+ lookup.put(s.getCode(), s);
+ }
+
+ private int code;
+
+ H5O_type(int layout_type) { this.code = layout_type; }
+
+ public int getCode() { return this.code; }
+
+ public static H5O_type get(int code) { return lookup.get(code); }
+ }
+
+ private static void do_iterate()
+ {
+ long file_id = HDF5Constants.H5I_INVALID_HID;
+
+ // Open a file using default properties.
+ try {
+ file_id = H5.H5Fopen(FILENAME, HDF5Constants.H5F_ACC_RDONLY, HDF5Constants.H5P_DEFAULT);
+ }
+ catch (Exception e) {
+ e.printStackTrace();
+ }
+
+ // Begin iteration.
+ System.out.println("Objects in root group:");
+ try {
+ if (file_id >= 0) {
+ int count = (int)H5.H5Gn_members(file_id, DATASETNAME);
+ String[] oname = new String[count];
+ int[] otype = new int[count];
+ int[] ltype = new int[count];
+ H5O_token_t[] otokens = new H5O_token_t[count];
+ H5.H5Gget_obj_info_all(file_id, DATASETNAME, oname, otype, ltype, otokens,
+ HDF5Constants.H5_INDEX_NAME);
+
+ // Get type of the object and display its name and type.
+ for (int indx = 0; indx < otype.length; indx++) {
+ switch (H5O_type.get(otype[indx])) {
+ case H5O_TYPE_GROUP:
+ System.out.println(" Group: " + oname[indx]);
+ break;
+ case H5O_TYPE_DATASET:
+ System.out.println(" Dataset: " + oname[indx]);
+ break;
+ case H5O_TYPE_NAMED_DATATYPE:
+ System.out.println(" Datatype: " + oname[indx]);
+ break;
+ default:
+ System.out.println(" Unknown: " + oname[indx]);
+ }
+ }
+ }
+ }
+ 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) { H5Ex_G_Iterate.do_iterate(); }
+}