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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)
commit6f2d22d86e6a265535efe22a8bb3872b3b32a52b (patch)
treef79e0d9778b13466282c159dfec67d31faba5b8d /java/examples/datasets/H5Ex_D_Compact.java
parent184445f4a45c602887ca0624c5295a7b6fea2d21 (diff)
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Add variable option syncing for examples (#3885)
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diff --git a/java/examples/datasets/H5Ex_D_Compact.java b/java/examples/datasets/H5Ex_D_Compact.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 read and write data to a compact
- dataset. The program first writes integers to a compact
- dataset with dataspace dimensions of DIM_XxDIM_Y, then
- closes the file. Next, it reopens the file, reads back
- the data, and outputs it to the screen.
- ************************************************************/
-package examples.datasets;
-
-import java.util.EnumSet;
-import java.util.HashMap;
-import java.util.Map;
-
-import hdf.hdf5lib.H5;
-import hdf.hdf5lib.HDF5Constants;
-
-public class H5Ex_D_Compact {
- private static String FILENAME = "H5Ex_D_Compact.h5";
- private static String DATASETNAME = "DS1";
- private static final int DIM_X = 4;
- private static final int DIM_Y = 7;
- private static final int RANK = 2;
-
- // Values for the status of space allocation
- enum H5D_layout {
- H5D_LAYOUT_ERROR(-1),
- H5D_COMPACT(0),
- H5D_CONTIGUOUS(1),
- H5D_CHUNKED(2),
- H5D_VIRTUAL(3),
- H5D_NLAYOUTS(4);
- private static final Map<Integer, H5D_layout> lookup = new HashMap<Integer, H5D_layout>();
-
- static
- {
- for (H5D_layout s : EnumSet.allOf(H5D_layout.class))
- lookup.put(s.getCode(), s);
- }
-
- private int code;
-
- H5D_layout(int layout_type) { this.code = layout_type; }
-
- public int getCode() { return this.code; }
-
- public static H5D_layout get(int code) { return lookup.get(code); }
- }
-
- private static void writeCompact()
- {
- long file_id = HDF5Constants.H5I_INVALID_HID;
- long filespace_id = HDF5Constants.H5I_INVALID_HID;
- long dataset_id = HDF5Constants.H5I_INVALID_HID;
- long dcpl_id = HDF5Constants.H5I_INVALID_HID;
- long[] dims = {DIM_X, DIM_Y};
- int[][] dset_data = new int[DIM_X][DIM_Y];
-
- // Initialize data.
- 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. Setting maximum size to NULL sets the maximum
- // size to be the current size.
- try {
- filespace_id = H5.H5Screate_simple(RANK, dims, null);
- }
- 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 layout to compact.
- try {
- if (dcpl_id >= 0)
- H5.H5Pset_layout(dcpl_id, H5D_layout.H5D_COMPACT.getCode());
- }
- catch (Exception e) {
- e.printStackTrace();
- }
-
- // Create the dataset. We will use all default properties for this example.
- try {
- if ((file_id >= 0) && (filespace_id >= 0) && (dcpl_id >= 0))
- dataset_id = H5.H5Dcreate(file_id, DATASETNAME, HDF5Constants.H5T_STD_I32LE, filespace_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 (dcpl_id >= 0)
- H5.H5Pclose(dcpl_id);
- }
- catch (Exception e) {
- e.printStackTrace();
- }
-
- try {
- if (dataset_id >= 0)
- H5.H5Dclose(dataset_id);
- }
- catch (Exception e) {
- e.printStackTrace();
- }
-
- try {
- if (filespace_id >= 0)
- H5.H5Sclose(filespace_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 readCompact()
- {
- long file_id = HDF5Constants.H5I_INVALID_HID;
- long filespace_id = HDF5Constants.H5I_INVALID_HID;
- long dataset_id = HDF5Constants.H5I_INVALID_HID;
- long dcpl_id = HDF5Constants.H5I_INVALID_HID;
- int[][] dset_data = new int[DIM_X][DIM_Y];
-
- // Open file and dataset using the default properties.
- 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();
- }
-
- // Retrieve the dataset creation property list.
- try {
- if (dataset_id >= 0)
- dcpl_id = H5.H5Dget_create_plist(dataset_id);
- }
- catch (Exception e) {
- e.printStackTrace();
- }
-
- // Print the storage layout.
- try {
- if (dcpl_id >= 0) {
- int layout_type = H5.H5Pget_layout(dcpl_id);
- System.out.print("Storage layout for " + DATASETNAME + " is: ");
- switch (H5D_layout.get(layout_type)) {
- case H5D_COMPACT:
- System.out.println("H5D_COMPACT");
- break;
- case H5D_CONTIGUOUS:
- System.out.println("H5D_CONTIGUOUS");
- break;
- case H5D_CHUNKED:
- System.out.println("H5D_CHUNKED");
- break;
- case H5D_VIRTUAL:
- System.out.println("H5D_VIRTUAL");
- break;
- case H5D_LAYOUT_ERROR:
- break;
- case H5D_NLAYOUTS:
- break;
- default:
- break;
- }
- System.out.println();
- }
- }
- catch (Exception e) {
- e.printStackTrace();
- }
-
- // 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("Data for " + DATASETNAME + " is: ");
- 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();
-
- // End access to the dataset and release resources used by it.
- try {
- if (dcpl_id >= 0)
- H5.H5Pclose(dcpl_id);
- }
- catch (Exception e) {
- e.printStackTrace();
- }
-
- try {
- if (dataset_id >= 0)
- H5.H5Dclose(dataset_id);
- }
- catch (Exception e) {
- e.printStackTrace();
- }
-
- try {
- if (filespace_id >= 0)
- H5.H5Sclose(filespace_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_Compact.writeCompact();
- H5Ex_D_Compact.readCompact();
- }
-}