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authorAllen Byrne <50328838+byrnHDF@users.noreply.github.com>2024-01-03 17:23:42 (GMT)
committerGitHub <noreply@github.com>2024-01-03 17:23:42 (GMT)
commit72e33ad7727765fd162a1f70ca502cc2437aabde (patch)
tree84b4cff56687fa7a8d443a529984932dd30a7fa4 /java/examples/groups/H5Ex_G_Iterate.java
parent95827bc79d592ad5aa71ec3199a83ede9b324c20 (diff)
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Merge examples and workflows from develop (#3918)
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diff --git a/java/examples/groups/H5Ex_G_Iterate.java b/java/examples/groups/H5Ex_G_Iterate.java
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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.
- ************************************************************/
-package examples.groups;
-
-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(); }
-}