diff options
Diffstat (limited to 'HDF5Examples/JAVA/H5T/H5Ex_T_VLString.java')
-rw-r--r-- | HDF5Examples/JAVA/H5T/H5Ex_T_VLString.java | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/HDF5Examples/JAVA/H5T/H5Ex_T_VLString.java b/HDF5Examples/JAVA/H5T/H5Ex_T_VLString.java new file mode 100644 index 0000000..d4d74e7 --- /dev/null +++ b/HDF5Examples/JAVA/H5T/H5Ex_T_VLString.java @@ -0,0 +1,135 @@ +/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * + * 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 and writing a VL string to a file. + ************************************************************/ + +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 = HDF5Constants.H5I_INVALID_HID; + long type_id = HDF5Constants.H5I_INVALID_HID; + long dataspace_id = HDF5Constants.H5I_INVALID_HID; + long dataset_id = HDF5Constants.H5I_INVALID_HID; + 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.H5DwriteVL(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 = HDF5Constants.H5I_INVALID_HID; + long type_id = HDF5Constants.H5I_INVALID_HID; + long dataset_id = HDF5Constants.H5I_INVALID_HID; + 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.H5DreadVL(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(); + } +} |