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111 lines
4.2 KiB
111 lines
4.2 KiB
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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* Copyright by The HDF Group. *
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* All rights reserved. *
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* *
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* This file is part of HDF5. The full HDF5 copyright notice, including *
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* terms governing use, modification, and redistribution, is contained in *
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* the COPYING file, which can be found at the root of the source code *
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* distribution tree, or in https://www.hdfgroup.org/licenses. *
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* If you do not have access to either file, you may request a copy from *
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* help@hdfgroup.org. *
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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/************************************************************
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This example shows how to iterate over group members using
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H5Gget_obj_info_all.
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************************************************************/
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package examples.groups;
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import java.util.EnumSet;
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import java.util.HashMap;
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import java.util.Map;
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import hdf.hdf5lib.H5;
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import hdf.hdf5lib.HDF5Constants;
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import hdf.hdf5lib.structs.H5O_token_t;
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public class H5Ex_G_Iterate {
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private static String FILENAME = "groups/h5ex_g_iterate.h5";
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private static String DATASETNAME = "/";
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enum H5O_type {
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H5O_TYPE_UNKNOWN(-1), // Unknown object type
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H5O_TYPE_GROUP(0), // Object is a group
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H5O_TYPE_DATASET(1), // Object is a dataset
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H5O_TYPE_NAMED_DATATYPE(2), // Object is a named data type
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H5O_TYPE_NTYPES(3); // Number of different object types
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private static final Map<Integer, H5O_type> lookup = new HashMap<Integer, H5O_type>();
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static
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{
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for (H5O_type s : EnumSet.allOf(H5O_type.class))
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lookup.put(s.getCode(), s);
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}
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private int code;
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H5O_type(int layout_type) { this.code = layout_type; }
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public int getCode() { return this.code; }
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public static H5O_type get(int code) { return lookup.get(code); }
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}
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private static void do_iterate()
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{
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long file_id = HDF5Constants.H5I_INVALID_HID;
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// Open a file using default properties.
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try {
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file_id = H5.H5Fopen(FILENAME, HDF5Constants.H5F_ACC_RDONLY, HDF5Constants.H5P_DEFAULT);
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}
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catch (Exception e) {
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e.printStackTrace();
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}
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// Begin iteration.
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System.out.println("Objects in root group:");
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try {
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if (file_id >= 0) {
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int count = (int)H5.H5Gn_members(file_id, DATASETNAME);
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String[] oname = new String[count];
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int[] otype = new int[count];
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int[] ltype = new int[count];
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H5O_token_t[] otokens = new H5O_token_t[count];
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H5.H5Gget_obj_info_all(file_id, DATASETNAME, oname, otype, ltype, otokens,
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HDF5Constants.H5_INDEX_NAME);
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// Get type of the object and display its name and type.
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for (int indx = 0; indx < otype.length; indx++) {
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switch (H5O_type.get(otype[indx])) {
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case H5O_TYPE_GROUP:
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System.out.println(" Group: " + oname[indx]);
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break;
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case H5O_TYPE_DATASET:
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System.out.println(" Dataset: " + oname[indx]);
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break;
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case H5O_TYPE_NAMED_DATATYPE:
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System.out.println(" Datatype: " + oname[indx]);
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break;
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default:
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System.out.println(" Unknown: " + oname[indx]);
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}
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}
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}
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}
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catch (Exception e) {
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e.printStackTrace();
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}
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// Close the file.
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try {
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if (file_id >= 0)
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H5.H5Fclose(file_id);
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}
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catch (Exception e) {
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e.printStackTrace();
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}
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}
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public static void main(String[] args) { H5Ex_G_Iterate.do_iterate(); }
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}
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