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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 dataset attribute.
************************************************************/
package examples.intro;
import hdf.hdf5lib.H5;
import hdf.hdf5lib.HDF5Constants;
public class H5_CreateAttribute {
private static String FILENAME = "H5_CreateAttribute.h5";
private static String DATASETNAME = "dset";
private static final int DIM_X = 4;
private static final int DIM_Y = 6;
private static String DATASETATTRIBUTE = "Units";
private static void CreateDatasetAttribute() {
long file_id = HDF5Constants.H5I_INVALID_HID;
long dataspace_id = HDF5Constants.H5I_INVALID_HID;
long dataset_id = HDF5Constants.H5I_INVALID_HID;
long attribute_id = HDF5Constants.H5I_INVALID_HID;
long[] dims1 = { DIM_X, DIM_Y };
long[] dims = { 2 };
int[] attr_data = { 100, 200 };
// Create a new file using default properties.
try {
file_id = H5.H5Fcreate(FILENAME, HDF5Constants.H5F_ACC_TRUNC, HDF5Constants.H5P_DEFAULT,
HDF5Constants.H5P_DEFAULT);
}
catch (Exception e) {
e.printStackTrace();
}
// Create the data space for the dataset.
try {
dataspace_id = H5.H5Screate_simple(2, dims1, null);
}
catch (Exception e) {
e.printStackTrace();
}
// Create the dataset.
try {
if ((file_id >= 0) && (dataspace_id >= 0))
dataset_id = H5.H5Dcreate(file_id, "/" + DATASETNAME, HDF5Constants.H5T_STD_I32BE, dataspace_id,
HDF5Constants.H5P_DEFAULT, HDF5Constants.H5P_DEFAULT, HDF5Constants.H5P_DEFAULT);
}
catch (Exception e) {
e.printStackTrace();
}
// Terminate access to the data space.
try {
if (dataspace_id >= 0)
H5.H5Sclose(dataspace_id);
}
catch (Exception e) {
e.printStackTrace();
}
// Create the data space for the attribute.
try {
dataspace_id = H5.H5Screate_simple(1, dims, null);
}
catch (Exception e) {
e.printStackTrace();
}
// Create a dataset attribute.
try {
if ((dataset_id >= 0) && (dataspace_id >= 0))
attribute_id = H5.H5Acreate(dataset_id, DATASETATTRIBUTE, HDF5Constants.H5T_STD_I32BE, dataspace_id,
HDF5Constants.H5P_DEFAULT, HDF5Constants.H5P_DEFAULT);
}
catch (Exception e) {
e.printStackTrace();
}
// Write the attribute data.
try {
if (attribute_id >= 0)
H5.H5Awrite(attribute_id, HDF5Constants.H5T_NATIVE_INT, attr_data);
}
catch (Exception e) {
e.printStackTrace();
}
// Close the attribute.
try {
if (attribute_id >= 0)
H5.H5Aclose(attribute_id);
}
catch (Exception e) {
e.printStackTrace();
}
// Close the dataspace.
try {
if (dataspace_id >= 0)
H5.H5Sclose(dataspace_id);
}
catch (Exception e) {
e.printStackTrace();
}
// Close to the dataset.
try {
if (dataset_id >= 0)
H5.H5Dclose(dataset_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) {
H5_CreateAttribute.CreateDatasetAttribute();
}
}
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