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Diffstat (limited to 'java/examples/datatypes/H5Ex_T_OpaqueAttribute.java')
| -rw-r--r-- | java/examples/datatypes/H5Ex_T_OpaqueAttribute.java | 305 |
1 files changed, 0 insertions, 305 deletions
diff --git a/java/examples/datatypes/H5Ex_T_OpaqueAttribute.java b/java/examples/datatypes/H5Ex_T_OpaqueAttribute.java deleted file mode 100644 index b8a15a6..0000000 --- a/java/examples/datatypes/H5Ex_T_OpaqueAttribute.java +++ /dev/null @@ -1,305 +0,0 @@ -/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * - * 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. * - * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ - -/************************************************************ - This example shows how to read and write opaque datatypes - to an attribute. The program first writes opaque data to - an attribute with a dataspace of DIM0, then closes the - file. Next, it reopens the file, reads back the data, and - outputs it to the screen. - ************************************************************/ - -package examples.datatypes; - -import hdf.hdf5lib.H5; -import hdf.hdf5lib.HDF5Constants; - -public class H5Ex_T_OpaqueAttribute { - private static String FILENAME = "H5Ex_T_OpaqueAttribute.h5"; - private static String DATASETNAME = "DS1"; - private static String ATTRIBUTENAME = "A1"; - private static final int DIM0 = 4; - private static final int LEN = 7; - private static final int RANK = 1; - - private static void CreateDataset() - { - long file_id = HDF5Constants.H5I_INVALID_HID; - long dataspace_id = HDF5Constants.H5I_INVALID_HID; - long datatype_id = HDF5Constants.H5I_INVALID_HID; - long dataset_id = HDF5Constants.H5I_INVALID_HID; - long attribute_id = HDF5Constants.H5I_INVALID_HID; - long[] dims = {DIM0}; - byte[] dset_data = new byte[DIM0 * LEN]; - byte[] str_data = {'O', 'P', 'A', 'Q', 'U', 'E'}; - - // Initialize data. - for (int indx = 0; indx < DIM0; indx++) { - for (int jndx = 0; jndx < LEN - 1; jndx++) - dset_data[jndx + indx * LEN] = str_data[jndx]; - dset_data[LEN - 1 + indx * LEN] = (byte)(indx + '0'); - } - - // 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 dataset with a scalar dataspace. - try { - dataspace_id = H5.H5Screate(HDF5Constants.H5S_SCALAR); - if (dataspace_id >= 0) { - dataset_id = H5.H5Dcreate(file_id, DATASETNAME, HDF5Constants.H5T_STD_I32LE, dataspace_id, - HDF5Constants.H5P_DEFAULT, HDF5Constants.H5P_DEFAULT, - HDF5Constants.H5P_DEFAULT); - H5.H5Sclose(dataspace_id); - dataspace_id = HDF5Constants.H5I_INVALID_HID; - } - } - catch (Exception e) { - e.printStackTrace(); - } - - // Create opaque datatype and set the tag to something appropriate. - // For this example we will write and view the data as a character - // array. - try { - datatype_id = H5.H5Tcreate(HDF5Constants.H5T_OPAQUE, (long)LEN); - if (datatype_id >= 0) - H5.H5Tset_tag(datatype_id, "Character array"); - } - 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 attribute and write the array data to it. - try { - if ((dataset_id >= 0) && (datatype_id >= 0) && (dataspace_id >= 0)) - attribute_id = H5.H5Acreate(dataset_id, ATTRIBUTENAME, datatype_id, dataspace_id, - HDF5Constants.H5P_DEFAULT, HDF5Constants.H5P_DEFAULT); - } - catch (Exception e) { - e.printStackTrace(); - } - - // Write the dataset. - try { - if ((attribute_id >= 0) && (datatype_id >= 0)) - H5.H5Awrite(attribute_id, datatype_id, dset_data); - } - catch (Exception e) { - e.printStackTrace(); - } - - // End access to the dataset and release resources used by it. - try { - if (attribute_id >= 0) - H5.H5Aclose(attribute_id); - } - catch (Exception e) { - e.printStackTrace(); - } - - try { - if (dataset_id >= 0) - H5.H5Dclose(dataset_id); - } - 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(); - } - - try { - if (datatype_id >= 0) - H5.H5Tclose(datatype_id); - } - catch (Exception e) { - e.printStackTrace(); - } - - // Close the file. - try { - if (file_id >= 0) - H5.H5Fclose(file_id); - } - catch (Exception e) { - e.printStackTrace(); - } - } - - private static void ReadDataset() - { - long file_id = HDF5Constants.H5I_INVALID_HID; - long datatype_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 type_len = -1; - long[] dims = {DIM0}; - byte[] dset_data; - String tag_name = null; - - // Open an existing file. - try { - file_id = H5.H5Fopen(FILENAME, HDF5Constants.H5F_ACC_RDONLY, HDF5Constants.H5P_DEFAULT); - } - catch (Exception e) { - e.printStackTrace(); - } - - // Open an existing dataset. - try { - if (file_id >= 0) - dataset_id = H5.H5Dopen(file_id, DATASETNAME, HDF5Constants.H5P_DEFAULT); - } - catch (Exception e) { - e.printStackTrace(); - } - - try { - if (dataset_id >= 0) - attribute_id = H5.H5Aopen_by_name(dataset_id, ".", ATTRIBUTENAME, HDF5Constants.H5P_DEFAULT, - HDF5Constants.H5P_DEFAULT); - } - catch (Exception e) { - e.printStackTrace(); - } - - // Get datatype and properties for the datatype. - try { - if (attribute_id >= 0) - datatype_id = H5.H5Aget_type(attribute_id); - if (datatype_id >= 0) { - type_len = H5.H5Tget_size(datatype_id); - tag_name = H5.H5Tget_tag(datatype_id); - } - } - catch (Exception e) { - e.printStackTrace(); - } - - // Get dataspace and allocate memory for read buffer. - try { - if (attribute_id >= 0) - dataspace_id = H5.H5Aget_space(attribute_id); - } - catch (Exception e) { - e.printStackTrace(); - } - - try { - if (dataspace_id >= 0) - H5.H5Sget_simple_extent_dims(dataspace_id, dims, null); - } - catch (Exception e) { - e.printStackTrace(); - } - - // Allocate buffer. - dset_data = new byte[(int)(dims[0] * type_len)]; - - // Read data. - try { - if ((attribute_id >= 0) && (datatype_id >= 0)) - H5.H5Aread(attribute_id, datatype_id, dset_data); - } - catch (Exception e) { - e.printStackTrace(); - } - - // Output the data to the screen. - System.out.println("Datatype tag for " + ATTRIBUTENAME + " is: \"" + tag_name + "\""); - for (int indx = 0; indx < dims[0]; indx++) { - System.out.print(ATTRIBUTENAME + "[" + indx + "]: "); - for (int jndx = 0; jndx < type_len; jndx++) { - char temp = (char)dset_data[jndx + indx * (int)type_len]; - System.out.print(temp); - } - System.out.println(""); - } - System.out.println(); - - // End access to the dataset and release resources used by it. - try { - if (attribute_id >= 0) - H5.H5Aclose(attribute_id); - } - catch (Exception e) { - e.printStackTrace(); - } - - try { - if (dataset_id >= 0) - H5.H5Dclose(dataset_id); - } - 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(); - } - - try { - if (datatype_id >= 0) - H5.H5Tclose(datatype_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) - { - H5Ex_T_OpaqueAttribute.CreateDataset(); - // Now we begin the read section of this example. Here we assume - // the dataset and array have the same name and rank, but can have - // any size. Therefore we must allocate a new array to read in - // data using malloc(). - H5Ex_T_OpaqueAttribute.ReadDataset(); - } -} |