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Diffstat (limited to 'HDF5Examples/JAVA/H5J/HDF5DatasetCreate.java')
| -rw-r--r-- | HDF5Examples/JAVA/H5J/HDF5DatasetCreate.java | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/HDF5Examples/JAVA/H5J/HDF5DatasetCreate.java b/HDF5Examples/JAVA/H5J/HDF5DatasetCreate.java new file mode 100644 index 0000000..05fea5f --- /dev/null +++ b/HDF5Examples/JAVA/H5J/HDF5DatasetCreate.java @@ -0,0 +1,192 @@ +/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * + * 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 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. * + * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ + +import hdf.hdf5lib.H5; +import hdf.hdf5lib.HDF5Constants; + +/** + * <p> + * Title: HDF Native Package (Java) Example + * </p> + * <p> + * Description: this example shows how to create HDF5 datasets using the + * "HDF Native Package (Java)". The example created the group structure and + * datasets: + * + * <pre> + * "/" (root) + * integer arrays + * 2D 32-bit integer 20x10 + * 3D 16-bit integer 20x10x5 + * float arrays + * 2D 64-bit double 20x10 + * 3D 32-bit float 20x10x5 + * </pre> + * + * </p> + */ +public class HDF5DatasetCreate { + private static String fname = "HDF5DatasetCreate.h5"; + private static long[] dims2D = {20, 10}; + private static long[] dims3D = {20, 10, 5}; + + private static void CreateDataset() + { + long file_id = HDF5Constants.H5I_INVALID_HID; + long group_id1 = HDF5Constants.H5I_INVALID_HID; + long group_id2 = HDF5Constants.H5I_INVALID_HID; + long dataspace_id1 = HDF5Constants.H5I_INVALID_HID; + long dataspace_id2 = HDF5Constants.H5I_INVALID_HID; + long dataset_id = HDF5Constants.H5I_INVALID_HID; + + // Create a new file using default properties. + try { + file_id = H5.H5Fcreate(fname, HDF5Constants.H5F_ACC_TRUNC, HDF5Constants.H5P_DEFAULT, + HDF5Constants.H5P_DEFAULT); + } + catch (Exception e) { + e.printStackTrace(); + System.err.println("Failed to create file:" + fname); + return; + } + + // Create a group in the file. + try { + if (file_id >= 0) { + group_id1 = H5.H5Gcreate(file_id, "g1", HDF5Constants.H5P_DEFAULT, HDF5Constants.H5P_DEFAULT, + HDF5Constants.H5P_DEFAULT); + group_id2 = H5.H5Gcreate(file_id, "g2", HDF5Constants.H5P_DEFAULT, HDF5Constants.H5P_DEFAULT, + HDF5Constants.H5P_DEFAULT); + } + } + catch (Exception e) { + e.printStackTrace(); + } + + // Create the data space for the 2D dataset. + try { + dataspace_id1 = H5.H5Screate_simple(2, dims2D, null); + } + catch (Exception e) { + e.printStackTrace(); + } + + // Create the data space for the 3D dataset. + try { + dataspace_id2 = H5.H5Screate_simple(3, dims3D, null); + } + catch (Exception e) { + e.printStackTrace(); + } + + // create 2D 32-bit (4 bytes) integer dataset of 20 by 10 + try { + if ((group_id1 >= 0) && (dataspace_id1 >= 0)) { + dataset_id = H5.H5Dcreate( + group_id1, "2D 32-bit integer 20x10", HDF5Constants.H5T_NATIVE_INT32, dataspace_id1, + HDF5Constants.H5P_DEFAULT, HDF5Constants.H5P_DEFAULT, HDF5Constants.H5P_DEFAULT); + if (dataset_id >= 0) + H5.H5Dclose(dataset_id); + } + } + catch (Exception e) { + e.printStackTrace(); + } + + // create 3D 8-bit (1 byte) unsigned integer dataset of 20 by 10 by 5 + try { + if ((group_id1 >= 0) && (dataspace_id2 >= 0)) { + dataset_id = + H5.H5Dcreate(group_id1, "3D 8-bit unsigned integer 20x10x5", + HDF5Constants.H5T_NATIVE_INT8, dataspace_id2, HDF5Constants.H5P_DEFAULT, + HDF5Constants.H5P_DEFAULT, HDF5Constants.H5P_DEFAULT); + if (dataset_id >= 0) + H5.H5Dclose(dataset_id); + } + } + catch (Exception e) { + e.printStackTrace(); + } + + // create 2D 64-bit (8 bytes) double dataset of 20 by 10 + try { + if ((group_id2 >= 0) && (dataspace_id1 >= 0)) { + dataset_id = H5.H5Dcreate( + group_id2, "2D 64-bit double 20x10", HDF5Constants.H5T_NATIVE_DOUBLE, dataspace_id1, + HDF5Constants.H5P_DEFAULT, HDF5Constants.H5P_DEFAULT, HDF5Constants.H5P_DEFAULT); + if (dataset_id >= 0) + H5.H5Dclose(dataset_id); + } + } + catch (Exception e) { + e.printStackTrace(); + } + + // create 3D 32-bit (4 bytes) float dataset of 20 by 10 by 5 + try { + if ((group_id2 >= 0) && (dataspace_id2 >= 0)) { + dataset_id = H5.H5Dcreate( + group_id2, "3D 32-bit float 20x10x5", HDF5Constants.H5T_NATIVE_FLOAT, dataspace_id2, + HDF5Constants.H5P_DEFAULT, HDF5Constants.H5P_DEFAULT, HDF5Constants.H5P_DEFAULT); + if (dataset_id >= 0) + H5.H5Dclose(dataset_id); + } + } + catch (Exception e) { + e.printStackTrace(); + } + + // Terminate access to the data space. + try { + if (dataspace_id2 >= 0) + H5.H5Sclose(dataspace_id2); + } + catch (Exception e) { + e.printStackTrace(); + } + try { + if (dataspace_id1 >= 0) + H5.H5Sclose(dataspace_id1); + } + catch (Exception e) { + e.printStackTrace(); + } + + // Close the groups. + try { + if (group_id2 >= 0) + H5.H5Gclose(group_id2); + } + catch (Exception e) { + e.printStackTrace(); + } + try { + if (group_id1 >= 0) + H5.H5Gclose(group_id1); + } + 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) { HDF5DatasetCreate.CreateDataset(); } +} |