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Diffstat (limited to 'java/examples/groups/H5Ex_G_Traverse.java')
| -rw-r--r-- | java/examples/groups/H5Ex_G_Traverse.java | 167 |
1 files changed, 0 insertions, 167 deletions
diff --git a/java/examples/groups/H5Ex_G_Traverse.java b/java/examples/groups/H5Ex_G_Traverse.java deleted file mode 100644 index 61a269c..0000000 --- a/java/examples/groups/H5Ex_G_Traverse.java +++ /dev/null @@ -1,167 +0,0 @@ -/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * - * 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 a way to recursively traverse the file -using H5Literate. The method shown here guarantees that -the recursion will not enter an infinite loop, but does -not prevent objects from being visited more than once. -The program prints the directory structure of the file -specified in FILE. The default file used by this example -implements the structure described in the User's Guide, -chapter 4, figure 26. - ************************************************************/ -package examples.groups; - -import hdf.hdf5lib.H5; -import hdf.hdf5lib.HDF5Constants; -import hdf.hdf5lib.callbacks.H5L_iterate_opdata_t; -import hdf.hdf5lib.callbacks.H5L_iterate_t; -import hdf.hdf5lib.structs.H5L_info_t; -import hdf.hdf5lib.structs.H5O_info_t; - -import examples.groups.H5Ex_G_Iterate.H5O_type; - -class opdata implements H5L_iterate_opdata_t { - int recurs; - opdata prev; - H5O_token_t obj_token; -} - -public class H5Ex_G_Traverse { - - private static String FILE = "h5ex_g_traverse.h5"; - public static H5L_iterate_t iter_cb = new H5L_iter_callbackT(); - - private static void OpenGroup() - { - long file_id = HDF5Constants.H5I_INVALID_HID; - H5O_info_t infobuf; - opdata od = new opdata(); - - // Open file and initialize the operator data structure. - try { - file_id = H5.H5Fopen(FILE, HDF5Constants.H5F_ACC_RDONLY, HDF5Constants.H5P_DEFAULT); - if (file_id >= 0) { - infobuf = H5.H5Oget_info(file_id); - od.recurs = 0; - od.prev = null; - od.obj_token = infobuf.token; - } - } - catch (Exception e) { - e.printStackTrace(); - } - - // Print the root group and formatting, begin iteration. - try { - System.out.println("/ {"); - // H5L_iterate_t iter_cb = new H5L_iter_callbackT(); - H5.H5Literate(file_id, HDF5Constants.H5_INDEX_NAME, HDF5Constants.H5_ITER_NATIVE, 0L, iter_cb, - od); - System.out.println("}"); - } - catch (Exception e) { - e.printStackTrace(); - } - - // Close and release resources. - try { - if (file_id >= 0) - H5.H5Fclose(file_id); - } - catch (Exception e) { - e.printStackTrace(); - } - } - - public static void main(String[] args) { H5Ex_G_Traverse.OpenGroup(); } -} - -class H5L_iter_callbackT implements H5L_iterate_t { - public int callback(long group, String name, H5L_info_t info, H5L_iterate_opdata_t op_data) - { - - H5O_info_t infobuf; - int return_val = 0; - opdata od = (opdata)op_data; // Type conversion - int spaces = 2 * (od.recurs + 1); // Number of white spaces to prepend to output. - - // Get type of the object and display its name and type. - // The name of the object is passed to this function by the Library. - try { - infobuf = H5.H5Oget_info_by_name(group, name, HDF5Constants.H5P_DEFAULT); - - for (int i = 0; i < spaces; i++) - System.out.print(" "); // Format output. - switch (H5O_type.get(infobuf.type)) { - case H5O_TYPE_GROUP: - System.out.println("Group: " + name + " { "); - // Check group object token against linked list of operator - // data structures. We will always run the check, as the - // reference count cannot be relied upon if there are - // symbolic links, and H5Oget_info_by_name always follows - // symbolic links. Alternatively we could use H5Lget_info - // and never recurse on groups discovered by symbolic - // links, however it could still fail if an object's - // reference count was manually manipulated with - // H5Odecr_refcount. - if (group_check(od, infobuf.token)) { - for (int i = 0; i < spaces; i++) - System.out.print(" "); - System.out.println(" Warning: Loop detected!"); - } - else { - // Initialize new object of type opdata and begin - // recursive iteration on the discovered - // group. The new opdata is given a pointer to the - // current one. - opdata nextod = new opdata(); - nextod.recurs = od.recurs + 1; - nextod.prev = od; - nextod.obj_token = infobuf.token; - H5L_iterate_t iter_cb2 = new H5L_iter_callbackT(); - return_val = H5.H5Literate_by_name(group, name, HDF5Constants.H5_INDEX_NAME, - HDF5Constants.H5_ITER_NATIVE, 0L, iter_cb2, nextod, - HDF5Constants.H5P_DEFAULT); - } - for (int i = 0; i < spaces; i++) - System.out.print(" "); - System.out.println("}"); - break; - case H5O_TYPE_DATASET: - System.out.println("Dataset: " + name); - break; - case H5O_TYPE_NAMED_DATATYPE: - System.out.println("Datatype: " + name); - break; - default: - System.out.println("Unknown: " + name); - } - } - catch (Exception e) { - e.printStackTrace(); - } - - return return_val; - } - - public boolean group_check(opdata od, H5O_token_t target_token) - { - if (od.obj_token.equals(target_token)) - return true; // Object tokens match - else if (od.recurs == 0) - return false; // Root group reached with no matches - else - return group_check(od.prev, target_token); // Recursively examine the next node - } -} |