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Diffstat (limited to 'java/examples/groups/H5Ex_G_Corder.java')
-rw-r--r-- | java/examples/groups/H5Ex_G_Corder.java | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/java/examples/groups/H5Ex_G_Corder.java b/java/examples/groups/H5Ex_G_Corder.java new file mode 100644 index 0000000..95790bf --- /dev/null +++ b/java/examples/groups/H5Ex_G_Corder.java @@ -0,0 +1,121 @@ +/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * + * 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. * + * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ +/************************************************************ + Creating a file with creation properties and traverse the + groups in alpabetical and creation order. + ************************************************************/ + +package examples.groups; + +import hdf.hdf5lib.H5; +import hdf.hdf5lib.HDF5Constants; +import hdf.hdf5lib.structs.H5G_info_t; + +public class H5Ex_G_Corder { + private static String FILE = "H5Ex_G_Corder.h5"; + + private static void CreateGroup() throws Exception { + long file_id = -1; + long group_id = -1; + long subgroup_id = -1; + long gcpl_id = -1; + int status; + H5G_info_t ginfo; + int i; + String name; + + try { + // Create a new file using default properties. + file_id = H5.H5Fcreate(FILE, HDF5Constants.H5F_ACC_TRUNC, HDF5Constants.H5P_DEFAULT, + HDF5Constants.H5P_DEFAULT); + + // Create group creation property list and enable link creation order tracking. + gcpl_id = H5.H5Pcreate(HDF5Constants.H5P_GROUP_CREATE); + status = H5.H5Pset_link_creation_order(gcpl_id, HDF5Constants.H5P_CRT_ORDER_TRACKED + + HDF5Constants.H5P_CRT_ORDER_INDEXED); + + // Create primary group using the property list. + if (status >= 0) + group_id = H5.H5Gcreate(file_id, "index_group", HDF5Constants.H5P_DEFAULT, gcpl_id, + HDF5Constants.H5P_DEFAULT); + + try { + /* + * Create subgroups in the primary group. These will be tracked by creation order. Note that these + * groups do not have to have the creation order tracking property set. + */ + subgroup_id = H5.H5Gcreate(group_id, "H", HDF5Constants.H5P_DEFAULT, HDF5Constants.H5P_DEFAULT, + HDF5Constants.H5P_DEFAULT); + status = H5.H5Gclose(subgroup_id); + subgroup_id = H5.H5Gcreate(group_id, "D", HDF5Constants.H5P_DEFAULT, HDF5Constants.H5P_DEFAULT, + HDF5Constants.H5P_DEFAULT); + status = H5.H5Gclose(subgroup_id); + subgroup_id = H5.H5Gcreate(group_id, "F", HDF5Constants.H5P_DEFAULT, HDF5Constants.H5P_DEFAULT, + HDF5Constants.H5P_DEFAULT); + status = H5.H5Gclose(subgroup_id); + subgroup_id = H5.H5Gcreate(group_id, "5", HDF5Constants.H5P_DEFAULT, HDF5Constants.H5P_DEFAULT, + HDF5Constants.H5P_DEFAULT); + status = H5.H5Gclose(subgroup_id); + + // Get group info. + ginfo = H5.H5Gget_info(group_id); + + // Traverse links in the primary group using alphabetical indices (H5_INDEX_NAME). + System.out.println("Traversing group using alphabetical indices:"); + for (i = 0; i < ginfo.nlinks; i++) { + // Retrieve the name of the ith link in a group + name = H5.H5Lget_name_by_idx(group_id, ".", HDF5Constants.H5_INDEX_NAME, HDF5Constants.H5_ITER_INC, + i, HDF5Constants.H5P_DEFAULT); + System.out.println("Index " + i + ": " + name); + } + + // Traverse links in the primary group by creation order (H5_INDEX_CRT_ORDER). + System.out.println("Traversing group using creation order indices:"); + for (i = 0; i < ginfo.nlinks; i++) { + // Retrieve the name of the ith link in a group + name = H5.H5Lget_name_by_idx(group_id, ".", HDF5Constants.H5_INDEX_CRT_ORDER, + HDF5Constants.H5_ITER_INC, i, HDF5Constants.H5P_DEFAULT); + System.out.println("Index " + i + ": " + name); + } + + } + catch (Exception e) { + e.printStackTrace(); + } + } + 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 { + H5Ex_G_Corder.CreateGroup(); + } + catch (Exception ex) { + ex.printStackTrace(); + } + } + +} |