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//
// Create two datasets within groups.
package examples.intro;
import ncsa.hdf.object.Dataset;
import ncsa.hdf.object.Datatype;
import ncsa.hdf.object.FileFormat;
import ncsa.hdf.object.h5.H5Datatype;
import ncsa.hdf.object.h5.H5File;
import ncsa.hdf.object.h5.H5Group;
public class H5Object_CreateGroupDataset {
private static String FILENAME = "H5Object_CreateGroupDataset.h5";
private static String GROUPNAME = "MyGroup";
private static String GROUPNAME_A = "GroupA";
private static String DATASETNAME1 = "dset1";
private static String DATASETNAME2 = "dset2";
private static final int DIM1_X = 3;
private static final int DIM1_Y = 3;
private static final int DIM2_X = 2;
private static final int DIM2_Y = 10;
private static final int DATATYPE_SIZE = 4;
private static void h5_crtgrpd() {
H5File file = null;
H5Group grp = null;
Dataset dset = null;
int[][] dset1_data = new int[DIM1_X][DIM1_Y];
int[][] dset2_data = new int[DIM2_X][DIM2_Y];
long[] dims1 = { DIM1_X, DIM1_Y };
long[] dims2 = { DIM2_X, DIM2_Y };
final H5Datatype typeInt = new H5Datatype(Datatype.CLASS_INTEGER,
DATATYPE_SIZE, Datatype.ORDER_BE, -1);
// Initialize the first dataset.
for (int indx = 0; indx < DIM1_X; indx++)
for (int jndx = 0; jndx < DIM1_Y; jndx++)
dset1_data[indx][jndx] = jndx + 1;
// Initialize the second dataset.
for (int indx = 0; indx < DIM2_X; indx++)
for (int jndx = 0; jndx < DIM2_Y; jndx++)
dset2_data[indx][jndx] = jndx + 1;
// Open an existing file or create a new file.
try {
file = new H5File(FILENAME, FileFormat.CREATE);
file.open();
}
catch (Exception e) {
e.printStackTrace();
}
// Create the group for the first dataset.
try {
grp = (H5Group)file.createGroup("/" + GROUPNAME, null);
}
catch (Exception e) {
e.printStackTrace();
}
// Create the dataset in group "MyGroup".
// Write the first dataset.
try {
dset = file.createScalarDS("/" + GROUPNAME + "/" + DATASETNAME1, grp, typeInt,
dims1, null, null, 0,
dset1_data);
}
catch (Exception e) {
e.printStackTrace();
}
// Create the second dataset in group "Group_A".
try {
dset = file.createScalarDS("/" + GROUPNAME + "/" + DATASETNAME2, grp, typeInt,
dims2, null, null, 0,
dset2_data);
}
catch (Exception e) {
e.printStackTrace();
}
// Close the file.
try {
file.close();
}
catch (Exception e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
H5Object_CreateGroupDataset.h5_crtgrpd();
}
}
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