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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 and writing a VL string to a file.
+ ************************************************************/
+
+package examples.datatypes;
+
+import hdf.hdf5lib.H5;
+import hdf.hdf5lib.HDF5Constants;
+
+public class H5Ex_T_VLString
+{
+ private static String FILENAME = "H5Ex_T_VLString.h5";
+ private static String DATASETNAME = "DS1";
+
+ private static void createDataset() {
+ long file_id = -1;
+ long type_id = -1;
+ long dataspace_id = -1;
+ long dataset_id = -1;
+ int rank = 1;
+ String[] str_data = { "Parting", "is such", "sweet", "sorrow." };
+ long[] dims = { str_data.length };
+
+ // 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();
+ }
+
+ try {
+ type_id = H5.H5Tcopy(HDF5Constants.H5T_C_S1);
+ H5.H5Tset_size(type_id, HDF5Constants.H5T_VARIABLE);
+ }
+ catch (Exception e) {
+ e.printStackTrace();
+ }
+
+ // Create dataspace. Setting maximum size to NULL sets the maximum
+ // size to be the current size.
+ try {
+ dataspace_id = H5.H5Screate_simple(rank, dims, null);
+ }
+ catch (Exception e) {
+ e.printStackTrace();
+ }
+
+ // Create the dataset and write the string data to it.
+ try {
+ if ((file_id >= 0) && (type_id >= 0) && (dataspace_id >= 0)) {
+ dataset_id = H5.H5Dcreate(file_id, DATASETNAME, type_id, dataspace_id, HDF5Constants.H5P_DEFAULT,
+ HDF5Constants.H5P_DEFAULT, HDF5Constants.H5P_DEFAULT);
+ }
+ }
+ catch (Exception e) {
+ e.printStackTrace();
+ }
+
+ // Write the data to the dataset.
+ try {
+ if (dataset_id >= 0)
+ H5.H5Dwrite_VLStrings(dataset_id, type_id, HDF5Constants.H5S_ALL, HDF5Constants.H5S_ALL,
+ HDF5Constants.H5P_DEFAULT, str_data);
+ }
+ catch (Exception e) {
+ e.printStackTrace();
+ }
+
+ try {
+ H5.H5Sclose(dataspace_id);
+ H5.H5Tclose(type_id);
+ H5.H5Dclose(dataset_id);
+ H5.H5Fclose(file_id);
+ }
+ catch (Exception e) {
+ e.printStackTrace();
+ }
+ }
+
+ private static void readDataset() {
+ long file_id = -1;
+ long type_id = -1;
+ long dataset_id = -1;
+ String[] str_data = { "", "", "", "" };
+
+ try {
+ file_id = H5.H5Fopen(FILENAME, HDF5Constants.H5F_ACC_RDONLY, HDF5Constants.H5P_DEFAULT);
+ }
+ catch (Exception e) {
+ e.printStackTrace();
+ }
+
+ try {
+ dataset_id = H5.H5Dopen(file_id, DATASETNAME, HDF5Constants.H5P_DEFAULT);
+ type_id = H5.H5Dget_type(dataset_id);
+ H5.H5Dread_VLStrings(dataset_id, type_id, HDF5Constants.H5S_ALL, HDF5Constants.H5S_ALL, HDF5Constants.H5P_DEFAULT,
+ str_data);
+ }
+ catch (Exception e) {
+ e.printStackTrace();
+ }
+
+ for (int indx = 0; indx < str_data.length; indx++)
+ System.out.println(DATASETNAME + " [" + indx + "]: " + str_data[indx]);
+
+ try {
+ H5.H5Tclose(type_id);
+ H5.H5Dclose(dataset_id);
+ H5.H5Fclose(file_id);
+ }
+ catch (Exception e) {
+ e.printStackTrace();
+ }
+ }
+
+ public static void main(String[] args) {
+ H5Ex_T_VLString.createDataset();
+ H5Ex_T_VLString.readDataset();
+ }
+
+}