[svn-r29226] HDFFV-9552: merge in java code.
This commit is contained in:
Allen Byrne
241
java/examples/groups/H5Ex_G_Phase.java
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241
java/examples/groups/H5Ex_G_Phase.java
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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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* Copyright by The HDF Group. *
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* Copyright by the Board of Trustees of the University of Illinois. *
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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 files COPYING and Copyright.html. COPYING can be found at the root *
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* of the source code distribution tree; Copyright.html can be found at the *
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* root level of an installed copy of the electronic HDF5 document set and *
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* is linked from the top-level documents page. It can also be found at *
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* http://hdfgroup.org/HDF5/doc/Copyright.html. If you do not have *
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* access to either file, you may request a copy from help@hdfgroup.org. *
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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/************************************************************
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This example shows how to set the conditions for
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conversion between compact and dense (indexed) groups.
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************************************************************/
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package examples.groups;
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import hdf.hdf5lib.H5;
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import hdf.hdf5lib.HDF5Constants;
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import hdf.hdf5lib.structs.H5G_info_t;
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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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public class H5Ex_G_Phase {
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private static String FILE = "H5Ex_G_Phase.h5";
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private static int MAX_GROUPS = 7;
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private static int MAX_COMPACT = 5;
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private static int MIN_DENSE = 3;
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enum H5G_storage {
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H5G_STORAGE_TYPE_UNKNOWN(-1),
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H5G_STORAGE_TYPE_SYMBOL_TABLE(0),
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H5G_STORAGE_TYPE_COMPACT(1),
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H5G_STORAGE_TYPE_DENSE(2);
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private static final Map<Integer, H5G_storage> lookup = new HashMap<Integer, H5G_storage>();
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static {
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for (H5G_storage s : EnumSet.allOf(H5G_storage.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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H5G_storage(int layout_type) {
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this.code = layout_type;
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}
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public int getCode() {
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return this.code;
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}
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public static H5G_storage get(int code) {
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return lookup.get(code);
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}
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}
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private static void CreateGroup() {
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long file_id = -1;
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long group_id = -1;
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long subgroup_id = -1;
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long fapl_id = -1;
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long gcpl_id = -1;
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H5G_info_t ginfo;
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String name = "G0"; // Name of subgroup_id
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int i;
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// Set file access property list to allow the latest file format.This will allow the library to create new
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// format groups.
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try {
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fapl_id = H5.H5Pcreate(HDF5Constants.H5P_FILE_ACCESS);
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if (fapl_id >= 0)
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H5.H5Pset_libver_bounds(fapl_id, HDF5Constants.H5F_LIBVER_LATEST, HDF5Constants.H5F_LIBVER_LATEST);
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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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// Create group access property list and set the phase change conditions.
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try {
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gcpl_id = H5.H5Pcreate(HDF5Constants.H5P_GROUP_CREATE);
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if (gcpl_id >= 0)
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H5.H5Pset_link_phase_change(gcpl_id, MAX_COMPACT, MIN_DENSE);
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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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// Create a new file using the default properties.
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try {
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if (fapl_id >= 0)
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file_id = H5.H5Fcreate(FILE, HDF5Constants.H5F_ACC_TRUNC, HDF5Constants.H5P_DEFAULT, fapl_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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// Create primary group.
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try {
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if ((file_id >= 0) && (gcpl_id >= 0))
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group_id = H5.H5Gcreate(file_id, name, HDF5Constants.H5P_DEFAULT, gcpl_id, 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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// Add subgroups to "group" one at a time, print the storage type for "group" after each subgroup is created.
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for (i = 1; i <= MAX_GROUPS; i++) {
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// Define the subgroup name and create the subgroup.
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char append = (char) (((char) i) + '0');
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name = name + append; /* G1, G2, G3 etc. */
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try {
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if (group_id >= 0) {
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subgroup_id = H5.H5Gcreate(group_id, name, HDF5Constants.H5P_DEFAULT, HDF5Constants.H5P_DEFAULT,
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HDF5Constants.H5P_DEFAULT);
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H5.H5Gclose(subgroup_id);
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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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// Obtain the group info and print the group storage type
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try {
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if (group_id >= 0) {
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ginfo = H5.H5Gget_info(group_id);
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System.out.print(ginfo.nlinks + " Group" + (ginfo.nlinks == 1 ? " " : "s") + ": Storage type is ");
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switch (H5G_storage.get(ginfo.storage_type)) {
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case H5G_STORAGE_TYPE_COMPACT:
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System.out.println("H5G_STORAGE_TYPE_COMPACT"); // New compact format
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break;
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case H5G_STORAGE_TYPE_DENSE:
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System.out.println("H5G_STORAGE_TYPE_DENSE"); // New dense (indexed) format
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break;
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case H5G_STORAGE_TYPE_SYMBOL_TABLE:
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System.out.println("H5G_STORAGE_TYPE_SYMBOL_TABLE"); // Original format
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break;
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case H5G_STORAGE_TYPE_UNKNOWN:
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System.out.println("H5G_STORAGE_TYPE_UNKNOWN");
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break;
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default:
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System.out.println("Storage Type Invalid");
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break;
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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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}
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System.out.println();
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// Delete subgroups one at a time, print the storage type for "group" after each subgroup is deleted.
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for (i = MAX_GROUPS; i >= 1; i--) {
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// Define the subgroup name and delete the subgroup.
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try {
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H5.H5Ldelete(group_id, name, 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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name = name.substring(0, i + 1);
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// Obtain the group info and print the group storage type
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try {
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if (group_id >= 0) {
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ginfo = H5.H5Gget_info(group_id);
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System.out.print(ginfo.nlinks + " Group" + (ginfo.nlinks == 1 ? " " : "s") + ": Storage type is ");
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switch (H5G_storage.get(ginfo.storage_type)) {
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case H5G_STORAGE_TYPE_COMPACT:
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System.out.println("H5G_STORAGE_TYPE_COMPACT"); // New compact format
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break;
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case H5G_STORAGE_TYPE_DENSE:
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System.out.println("H5G_STORAGE_TYPE_DENSE"); // New dense (indexed) format
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break;
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case H5G_STORAGE_TYPE_SYMBOL_TABLE:
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System.out.println("H5G_STORAGE_TYPE_SYMBOL_TABLE"); // Original format
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break;
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case H5G_STORAGE_TYPE_UNKNOWN:
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System.out.println("H5G_STORAGE_TYPE_UNKNOWN");
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break;
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default:
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System.out.println("Storage Type Invalid");
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break;
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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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}
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// Close and release resources
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try {
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if (fapl_id >= 0)
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H5.H5Pclose(fapl_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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try {
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if (gcpl_id >= 0)
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H5.H5Pclose(gcpl_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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// Close the group
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try {
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if (group_id >= 0)
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H5.H5Gclose(group_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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// 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) {
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H5Ex_G_Phase.CreateGroup();
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}
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}
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