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package examples.groups;
import java.util.EnumSet;
import java.util.HashMap;
import java.util.Map;
import ncsa.hdf.hdf5lib.H5;
import ncsa.hdf.hdf5lib.HDF5Constants;
import ncsa.hdf.hdf5lib.structs.H5G_info_t;
import ncsa.hdf.object.FileFormat;
import ncsa.hdf.object.h5.H5File;
import ncsa.hdf.object.h5.H5Group;
public class H5ObjectEx_G_Compact {
private static final String FILE1 = "H5ObjectEx_G_Compact1.h5";
private static final String FILE2 = "H5ObjectEx_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() {
H5File file = null;
H5Group grp = null;
int file_id = -1;
int group_id = -1;
int fapl_id = -1;
H5G_info_t ginfo;
long size;
//Create file 1. This file will use original format groups.
try {
file = new H5File(FILE1, FileFormat.CREATE);
file.open();
}
catch (Exception e) {
e.printStackTrace();
}
//Create a group in the file1.
try {
grp = (H5Group)file.createGroup(GROUP, null);
group_id = grp.open();
}
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
}
}
}
catch(Exception e) {
e.printStackTrace();
}
// Close the group.
try {
if (group_id >= 0)
grp.close(group_id);
}
catch (Exception e) {
e.printStackTrace();
}
//close the file 1.
try {
file.close();
}
catch (Exception e) {
e.printStackTrace();
}
// Re-open file 1. Need to get the correct file size.
try {
file = new H5File(FILE1, FileFormat.READ);
file_id = file.open();
}
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 {
file.close();
}
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 = new H5File(FILE2, FileFormat.CREATE);
file.open(fapl_id);
}
catch (Exception e) {
e.printStackTrace();
}
//Create group in file2.
try {
grp = (H5Group)file.createGroup(GROUP, null);
group_id = grp.open();
}
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
}
}
}
catch (Exception e) {
e.printStackTrace();
}
// Close the group.
try {
if (group_id >= 0)
grp.close(group_id);
}
catch (Exception e) {
e.printStackTrace();
}
//close the file 2.
try {
file.close();
}
catch (Exception e) {
e.printStackTrace();
}
//Re-open file 2. Needed to get the correct file size.
try {
file = new H5File(FILE2, FileFormat.READ);
file_id = file.open(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 {
file.close();
}
catch (Exception e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
H5ObjectEx_G_Compact.CreateGroup();
}
}
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