/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * 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 set the conditions for conversion between compact and dense (indexed) groups. ************************************************************/ package examples.groups; import hdf.hdf5lib.H5; import hdf.hdf5lib.HDF5Constants; import hdf.hdf5lib.structs.H5G_info_t; import java.util.EnumSet; import java.util.HashMap; import java.util.Map; public class H5Ex_G_Phase { private static String FILE = "H5Ex_G_Phase.h5"; private static int MAX_GROUPS = 7; private static int MAX_COMPACT = 5; private static int MIN_DENSE = 3; enum H5G_storage { H5G_STORAGE_TYPE_UNKNOWN(-1), H5G_STORAGE_TYPE_SYMBOL_TABLE(0), H5G_STORAGE_TYPE_COMPACT(1), H5G_STORAGE_TYPE_DENSE(2); private static final Map lookup = new HashMap(); static { for (H5G_storage s : EnumSet.allOf(H5G_storage.class)) lookup.put(s.getCode(), s); } private int code; H5G_storage(int layout_type) { this.code = layout_type; } public int getCode() { return this.code; } public static H5G_storage get(int code) { return lookup.get(code); } } private static void CreateGroup() { long file_id = -1; long group_id = -1; long subgroup_id = -1; long fapl_id = -1; long gcpl_id = -1; H5G_info_t ginfo; String name = "G0"; // Name of subgroup_id int i; // Set file access property list to allow the latest file format.This will allow the library to create new // format groups. try { fapl_id = H5.H5Pcreate(HDF5Constants.H5P_FILE_ACCESS); if (fapl_id >= 0) H5.H5Pset_libver_bounds(fapl_id, HDF5Constants.H5F_LIBVER_LATEST, HDF5Constants.H5F_LIBVER_LATEST); } catch (Exception e) { e.printStackTrace(); } // Create group access property list and set the phase change conditions. try { gcpl_id = H5.H5Pcreate(HDF5Constants.H5P_GROUP_CREATE); if (gcpl_id >= 0) H5.H5Pset_link_phase_change(gcpl_id, MAX_COMPACT, MIN_DENSE); } catch (Exception e) { e.printStackTrace(); } // Create a new file using the default properties. try { if (fapl_id >= 0) file_id = H5.H5Fcreate(FILE, HDF5Constants.H5F_ACC_TRUNC, HDF5Constants.H5P_DEFAULT, fapl_id); } catch (Exception e) { e.printStackTrace(); } // Create primary group. try { if ((file_id >= 0) && (gcpl_id >= 0)) group_id = H5.H5Gcreate(file_id, name, HDF5Constants.H5P_DEFAULT, gcpl_id, HDF5Constants.H5P_DEFAULT); } catch (Exception e) { e.printStackTrace(); } // Add subgroups to "group" one at a time, print the storage type for "group" after each subgroup is created. for (i = 1; i <= MAX_GROUPS; i++) { // Define the subgroup name and create the subgroup. char append = (char) (((char) i) + '0'); name = name + append; /* G1, G2, G3 etc. */ try { if (group_id >= 0) { subgroup_id = H5.H5Gcreate(group_id, name, HDF5Constants.H5P_DEFAULT, HDF5Constants.H5P_DEFAULT, HDF5Constants.H5P_DEFAULT); H5.H5Gclose(subgroup_id); } } catch (Exception e) { e.printStackTrace(); } // Obtain the group info and print the group storage type try { if (group_id >= 0) { ginfo = H5.H5Gget_info(group_id); System.out.print(ginfo.nlinks + " Group" + (ginfo.nlinks == 1 ? " " : "s") + ": Storage type is "); switch (H5G_storage.get(ginfo.storage_type)) { case H5G_STORAGE_TYPE_COMPACT: System.out.println("H5G_STORAGE_TYPE_COMPACT"); // New compact format break; case H5G_STORAGE_TYPE_DENSE: System.out.println("H5G_STORAGE_TYPE_DENSE"); // New dense (indexed) format break; case H5G_STORAGE_TYPE_SYMBOL_TABLE: System.out.println("H5G_STORAGE_TYPE_SYMBOL_TABLE"); // Original format break; case H5G_STORAGE_TYPE_UNKNOWN: System.out.println("H5G_STORAGE_TYPE_UNKNOWN"); break; default: System.out.println("Storage Type Invalid"); break; } } } catch (Exception e) { e.printStackTrace(); } } System.out.println(); // Delete subgroups one at a time, print the storage type for "group" after each subgroup is deleted. for (i = MAX_GROUPS; i >= 1; i--) { // Define the subgroup name and delete the subgroup. try { H5.H5Ldelete(group_id, name, HDF5Constants.H5P_DEFAULT); } catch (Exception e) { e.printStackTrace(); } name = name.substring(0, i + 1); // Obtain the group info and print the group storage type try { if (group_id >= 0) { ginfo = H5.H5Gget_info(group_id); System.out.print(ginfo.nlinks + " Group" + (ginfo.nlinks == 1 ? " " : "s") + ": Storage type is "); switch (H5G_storage.get(ginfo.storage_type)) { case H5G_STORAGE_TYPE_COMPACT: System.out.println("H5G_STORAGE_TYPE_COMPACT"); // New compact format break; case H5G_STORAGE_TYPE_DENSE: System.out.println("H5G_STORAGE_TYPE_DENSE"); // New dense (indexed) format break; case H5G_STORAGE_TYPE_SYMBOL_TABLE: System.out.println("H5G_STORAGE_TYPE_SYMBOL_TABLE"); // Original format break; case H5G_STORAGE_TYPE_UNKNOWN: System.out.println("H5G_STORAGE_TYPE_UNKNOWN"); break; default: System.out.println("Storage Type Invalid"); break; } } } catch (Exception e) { e.printStackTrace(); } } // Close and release resources try { if (fapl_id >= 0) H5.H5Pclose(fapl_id); } catch (Exception e) { e.printStackTrace(); } try { if (gcpl_id >= 0) H5.H5Pclose(gcpl_id); } catch (Exception e) { e.printStackTrace(); } // Close the group try { if (group_id >= 0) H5.H5Gclose(group_id); } 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_Phase.CreateGroup(); } }