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authorAllen Byrne <50328838+byrnHDF@users.noreply.github.com>2023-12-14 18:50:30 (GMT)
committerGitHub <noreply@github.com>2023-12-14 18:50:30 (GMT)
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treef79e0d9778b13466282c159dfec67d31faba5b8d /java/examples/datasets/H5Ex_D_UnlimitedMod.java
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Add variable option syncing for examples (#3885)
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diff --git a/java/examples/datasets/H5Ex_D_UnlimitedMod.java b/java/examples/datasets/H5Ex_D_UnlimitedMod.java
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-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
- * 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 create and extend an unlimited
- dataset. The program first writes integers to a dataset
- with dataspace dimensions of DIM_XxDIM_Y, then closes the
- file. Next, it reopens the file, reads back the data,
- outputs it to the screen, extends the dataset, and writes
- new data to the entire extended dataset. Finally it
- reopens the file again, reads back the data, and outputs it
- to the screen.
- ************************************************************/
-package examples.datasets;
-
-import hdf.hdf5lib.H5;
-import hdf.hdf5lib.HDF5Constants;
-
-public class H5Ex_D_UnlimitedMod {
- private static String FILENAME = "H5Ex_D_UnlimitedMod.h5";
- private static String DATASETNAME = "DS1";
- private static final int DIM_X = 4;
- private static final int DIM_Y = 7;
- private static final int EDIM_X = 6;
- private static final int EDIM_Y = 10;
- private static final int CHUNK_X = 4;
- private static final int CHUNK_Y = 4;
- private static final int RANK = 2;
- private static final int NDIMS = 2;
-
- private static void writeUnlimited()
- {
- long file_id = HDF5Constants.H5I_INVALID_HID;
- long dcpl_id = HDF5Constants.H5I_INVALID_HID;
- long dataspace_id = HDF5Constants.H5I_INVALID_HID;
- long dataset_id = HDF5Constants.H5I_INVALID_HID;
- long[] dims = {DIM_X, DIM_Y};
- long[] chunk_dims = {CHUNK_X, CHUNK_Y};
- long[] maxdims = {HDF5Constants.H5S_UNLIMITED, HDF5Constants.H5S_UNLIMITED};
- int[][] dset_data = new int[DIM_X][DIM_Y];
-
- // Initialize the dataset.
- for (int indx = 0; indx < DIM_X; indx++)
- for (int jndx = 0; jndx < DIM_Y; jndx++)
- dset_data[indx][jndx] = indx * jndx - jndx;
-
- // 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 dataspace with unlimited dimensions.
- try {
- dataspace_id = H5.H5Screate_simple(RANK, dims, maxdims);
- }
- catch (Exception e) {
- e.printStackTrace();
- }
-
- // Create the dataset creation property list.
- try {
- dcpl_id = H5.H5Pcreate(HDF5Constants.H5P_DATASET_CREATE);
- }
- catch (Exception e) {
- e.printStackTrace();
- }
-
- // Set the chunk size.
- try {
- if (dcpl_id >= 0)
- H5.H5Pset_chunk(dcpl_id, NDIMS, chunk_dims);
- }
- catch (Exception e) {
- e.printStackTrace();
- }
-
- // Create the unlimited dataset.
- try {
- if ((file_id >= 0) && (dataspace_id >= 0) && (dcpl_id >= 0))
- dataset_id = H5.H5Dcreate(file_id, DATASETNAME, HDF5Constants.H5T_STD_I32LE, dataspace_id,
- HDF5Constants.H5P_DEFAULT, dcpl_id, HDF5Constants.H5P_DEFAULT);
- }
- catch (Exception e) {
- e.printStackTrace();
- }
-
- // Write the data to the dataset.
- try {
- if (dataset_id >= 0)
- H5.H5Dwrite(dataset_id, HDF5Constants.H5T_NATIVE_INT, HDF5Constants.H5S_ALL,
- HDF5Constants.H5S_ALL, HDF5Constants.H5P_DEFAULT, dset_data);
- }
- catch (Exception e) {
- e.printStackTrace();
- }
-
- // End access to the dataset and release resources used by it.
- try {
- if (dataset_id >= 0)
- H5.H5Dclose(dataset_id);
- }
- catch (Exception e) {
- e.printStackTrace();
- }
-
- try {
- if (dataspace_id >= 0)
- H5.H5Sclose(dataspace_id);
- }
- catch (Exception e) {
- e.printStackTrace();
- }
-
- try {
- if (dcpl_id >= 0)
- H5.H5Pclose(dcpl_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 extendUnlimited()
- {
- long file_id = HDF5Constants.H5I_INVALID_HID;
- long dataspace_id = HDF5Constants.H5I_INVALID_HID;
- long dataset_id = HDF5Constants.H5I_INVALID_HID;
- long[] dims = {DIM_X, DIM_Y};
- long[] extdims = {EDIM_X, EDIM_Y};
- int[][] dset_data;
- int[][] extend_dset_data = new int[EDIM_X][EDIM_Y];
-
- // Open an existing file.
- try {
- file_id = H5.H5Fopen(FILENAME, HDF5Constants.H5F_ACC_RDWR, 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();
- }
-
- // Get dataspace and allocate memory for read buffer. This is a
- // two dimensional dataset so the dynamic allocation must be done
- // in steps.
- try {
- if (dataset_id >= 0)
- dataspace_id = H5.H5Dget_space(dataset_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 array of pointers to rows.
- dset_data = new int[(int)dims[0]][(int)dims[1]];
-
- // Read the data using the default properties.
- try {
- if (dataset_id >= 0)
- H5.H5Dread(dataset_id, HDF5Constants.H5T_NATIVE_INT, HDF5Constants.H5S_ALL,
- HDF5Constants.H5S_ALL, HDF5Constants.H5P_DEFAULT, dset_data);
- }
- catch (Exception e) {
- e.printStackTrace();
- }
-
- // Output the data to the screen.
- System.out.println("Dataset before extension:");
- for (int indx = 0; indx < DIM_X; indx++) {
- System.out.print(" [ ");
- for (int jndx = 0; jndx < DIM_Y; jndx++)
- System.out.print(dset_data[indx][jndx] + " ");
- System.out.println("]");
- }
- System.out.println();
-
- try {
- if (dataspace_id >= 0)
- H5.H5Sclose(dataspace_id);
- }
- catch (Exception e) {
- e.printStackTrace();
- }
-
- // Extend the dataset.
- try {
- if (dataset_id >= 0)
- H5.H5Dset_extent(dataset_id, extdims);
- }
- catch (Exception e) {
- e.printStackTrace();
- }
-
- // Retrieve the dataspace for the newly extended dataset.
- try {
- if (dataset_id >= 0)
- dataspace_id = H5.H5Dget_space(dataset_id);
- }
- catch (Exception e) {
- e.printStackTrace();
- }
-
- // Initialize data for writing to the extended dataset.
- for (int indx = 0; indx < EDIM_X; indx++)
- for (int jndx = 0; jndx < EDIM_Y; jndx++)
- extend_dset_data[indx][jndx] = jndx;
-
- // Write the data tto the extended dataset.
- try {
- if ((dataspace_id >= 0) && (dataset_id >= 0))
- H5.H5Dwrite(dataset_id, HDF5Constants.H5T_NATIVE_INT, HDF5Constants.H5S_ALL, dataspace_id,
- HDF5Constants.H5P_DEFAULT, extend_dset_data);
- }
- catch (Exception e) {
- e.printStackTrace();
- }
-
- // End access to the dataset and release resources used by it.
- try {
- if (dataset_id >= 0)
- H5.H5Dclose(dataset_id);
- }
- catch (Exception e) {
- e.printStackTrace();
- }
-
- try {
- if (dataspace_id >= 0)
- H5.H5Sclose(dataspace_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 readUnlimited()
- {
- long file_id = HDF5Constants.H5I_INVALID_HID;
- long dataspace_id = HDF5Constants.H5I_INVALID_HID;
- long dataset_id = HDF5Constants.H5I_INVALID_HID;
- long[] dims = {DIM_X, DIM_Y};
- int[][] dset_data;
-
- // 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();
- }
-
- // Get dataspace and allocate memory for the read buffer as before.
- try {
- if (dataset_id >= 0)
- dataspace_id = H5.H5Dget_space(dataset_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 array of pointers to rows.
- dset_data = new int[(int)dims[0]][(int)dims[1]];
-
- // Read the data using the default properties.
- try {
- if (dataset_id >= 0)
- H5.H5Dread(dataset_id, HDF5Constants.H5T_NATIVE_INT, HDF5Constants.H5S_ALL,
- HDF5Constants.H5S_ALL, HDF5Constants.H5P_DEFAULT, dset_data);
- }
- catch (Exception e) {
- e.printStackTrace();
- }
-
- // Output the data to the screen.
- System.out.println("Dataset after extension:");
- for (int indx = 0; indx < dims[0]; indx++) {
- System.out.print(" [ ");
- for (int jndx = 0; jndx < dims[1]; jndx++)
- System.out.print(dset_data[indx][jndx] + " ");
- System.out.println("]");
- }
- System.out.println();
-
- // End access to the dataset and release resources used by it.
- try {
- if (dataset_id >= 0)
- H5.H5Dclose(dataset_id);
- }
- catch (Exception e) {
- e.printStackTrace();
- }
-
- try {
- if (dataspace_id >= 0)
- H5.H5Sclose(dataspace_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_D_UnlimitedMod.writeUnlimited();
- H5Ex_D_UnlimitedMod.extendUnlimited();
- H5Ex_D_UnlimitedMod.readUnlimited();
- }
-}