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+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group. *
+ * Copyright by the Board of Trustees of the University of Illinois. *
+ * 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 files COPYING and Copyright.html. COPYING can be found at the root *
+ * of the source code distribution tree; Copyright.html can be found at the *
+ * root level of an installed copy of the electronic HDF5 document set and *
+ * is linked from the top-level documents page. It can also be found at *
+ * http://hdfgroup.org/HDF5/doc/Copyright.html. 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 = -1;
+ long dataspace_id = -1;
+ long dataset_id = -1;
+ long attribute_id = -1;
+ 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();
+ }
+
+}