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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* 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. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/************************************************************
Creating a file and print the storage layout.
************************************************************/
package examples.groups;
import java.util.EnumSet;
import java.util.HashMap;
import java.util.Map;
import hdf.hdf5lib.H5;
import hdf.hdf5lib.HDF5Constants;
import hdf.hdf5lib.structs.H5G_info_t;
public class H5Ex_G_Compact {
private static final String FILE1 = "H5Ex_G_Compact1.h5";
private static final String FILE2 = "H5Ex_G_Compact2.h5";
private static final String GROUP = "G1";
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<Integer, H5G_storage> lookup = new HashMap<Integer, H5G_storage>();
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); }
}
public static void CreateGroup()
{
long file_id = HDF5Constants.H5I_INVALID_HID;
long group_id = HDF5Constants.H5I_INVALID_HID;
long fapl_id = HDF5Constants.H5I_INVALID_HID;
H5G_info_t ginfo;
long size;
// Create file 1. This file will use original format groups.
try {
file_id = H5.H5Fcreate(FILE1, HDF5Constants.H5F_ACC_TRUNC, HDF5Constants.H5P_DEFAULT,
HDF5Constants.H5P_DEFAULT);
}
catch (Exception e) {
e.printStackTrace();
}
// Create a group in the file1.
try {
if (file_id >= 0)
group_id = H5.H5Gcreate(file_id, GROUP, HDF5Constants.H5P_DEFAULT, HDF5Constants.H5P_DEFAULT,
HDF5Constants.H5P_DEFAULT);
}
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("Group storage type for " + FILE1 + " 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 the group.
try {
if (group_id >= 0)
H5.H5Gclose(group_id);
}
catch (Exception e) {
e.printStackTrace();
}
// close the file 1.
try {
if (file_id >= 0)
H5.H5Fclose(file_id);
}
catch (Exception e) {
e.printStackTrace();
}
// Re-open file 1. Need to get the correct file size.
try {
file_id = H5.H5Fopen(FILE1, HDF5Constants.H5F_ACC_RDONLY, HDF5Constants.H5P_DEFAULT);
}
catch (Exception e) {
e.printStackTrace();
}
// Obtain and print the file size.
try {
if (file_id >= 0) {
size = H5.H5Fget_filesize(file_id);
System.out.println("File size for " + FILE1 + " is: " + size + " bytes");
}
}
catch (Exception e) {
e.printStackTrace();
}
// Close FILE1.
try {
if (file_id >= 0)
H5.H5Fclose(file_id);
}
catch (Exception e) {
e.printStackTrace();
}
// Set file access property list to allow the latest file format.
// This will allow the library to create new compact 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();
}
System.out.println();
// Create file 2 using the new file access property list.
try {
file_id = H5.H5Fcreate(FILE2, HDF5Constants.H5F_ACC_TRUNC, HDF5Constants.H5P_DEFAULT, fapl_id);
}
catch (Exception e) {
e.printStackTrace();
}
// Create group in file2.
try {
if (file_id >= 0)
group_id = H5.H5Gcreate(file_id, GROUP, HDF5Constants.H5P_DEFAULT, HDF5Constants.H5P_DEFAULT,
HDF5Constants.H5P_DEFAULT);
}
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("Group storage type for " + FILE2 + " 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 the group.
try {
if (group_id >= 0)
H5.H5Gclose(group_id);
}
catch (Exception e) {
e.printStackTrace();
}
// close the file 2.
try {
if (file_id >= 0)
H5.H5Fclose(file_id);
}
catch (Exception e) {
e.printStackTrace();
}
// Re-open file 2. Needed to get the correct file size.
try {
file_id = H5.H5Fopen(FILE2, HDF5Constants.H5F_ACC_RDONLY, fapl_id);
}
catch (Exception e) {
e.printStackTrace();
}
// Obtain and print the file size.
try {
if (file_id >= 0) {
size = H5.H5Fget_filesize(file_id);
System.out.println("File size for " + FILE2 + " is: " + size + " bytes");
}
}
catch (Exception e) {
e.printStackTrace();
}
// Close FILE2.
try {
if (file_id >= 0)
H5.H5Fclose(file_id);
}
catch (Exception e) {
e.printStackTrace();
}
}
public static void main(String[] args) { H5Ex_G_Compact.CreateGroup(); }
}
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