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Diffstat (limited to 'java/examples/groups/H5Ex_G_Iterate.java')
-rw-r--r-- | java/examples/groups/H5Ex_G_Iterate.java | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/java/examples/groups/H5Ex_G_Iterate.java b/java/examples/groups/H5Ex_G_Iterate.java new file mode 100644 index 0000000..d0b4ea4 --- /dev/null +++ b/java/examples/groups/H5Ex_G_Iterate.java @@ -0,0 +1,119 @@ +/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * + * 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 iterate over group members using + H5Gget_obj_info_all. + ************************************************************/ +package examples.groups; + +import hdf.hdf5lib.H5; +import hdf.hdf5lib.HDF5Constants; + +import java.util.EnumSet; +import java.util.HashMap; +import java.util.Map; + +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 = -1; + + // 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]; + long[] orefs = new long[count]; + H5.H5Gget_obj_info_all(file_id, DATASETNAME, oname, otype, ltype, orefs, 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(); + } + +} |