mirror of
https://github.com/HDFGroup/hdf5.git
synced 2024-12-09 07:32:32 +08:00
89fbe00dec
* commit '54957d37f5aa73912763dbb6e308555e863c43f4': Commit copyright header change for src/H5PLpkg.c which was added after running script to make changes. Add new files in release_docs to MANIFEST. Cimmit changes to Makefile.in(s) and H5PL.c that resulted from running autogen.sh. Merge pull request #407 in HDFFV/hdf5 from ~LRKNOX/hdf5_lrk:hdf5_1_10_1 to hdf5_1_10_1 Change copyright headers to replace url referring to file to be removed and replace it with new url for COPYING file.
291 lines
9.1 KiB
Java
291 lines
9.1 KiB
Java
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
|
|
* 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://support.hdfgroup.org/ftp/HDF5/releases. *
|
|
* 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 = -1;
|
|
long filespace_id = -1;
|
|
long dataset_id = -1;
|
|
long dcpl_id = -1;
|
|
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 = -1;
|
|
long filespace_id = -1;
|
|
long dataset_id = -1;
|
|
long dcpl_id = -1;
|
|
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();
|
|
}
|
|
|
|
}
|