-
Notifications
You must be signed in to change notification settings - Fork 14
/
H5ObjectEx_D_Transform.java
233 lines (206 loc) · 7.19 KB
/
H5ObjectEx_D_Transform.java
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
/************************************************************
This example shows how to read and write data to a dataset
using a data transform expression. The program first
writes integers to a dataset using the transform
expression TRANSFORM, then closes the file. Next, it
reopens the file, reads back the data without a transform,
and outputs the data to the screen. Finally it reads the
data using the transform expression RTRANSFORM and outputs
the results to the screen.
************************************************************/
package datasets;
import hdf.object.Dataset;
import hdf.object.Datatype;
import hdf.object.FileFormat;
import hdf.object.h5.H5Datatype;
import hdf.object.h5.H5File;
import hdf.hdf5lib.H5;
import hdf.hdf5lib.HDF5Constants;
public class H5ObjectEx_D_Transform {
private static String FILENAME = "H5ObjectEx_D_Transform.h5";
private static String DATASETNAME = "DS1";
private static final int DIM_X = 4;
private static final int DIM_Y = 7;
private static String TRANSFORM = "x+1";
private static String RTRANSFORM = "x-1";
private static void writeData()
{
H5File file = null;
Dataset dset = null;
long dataset_id = -1;
long dxpl_id = -1;
long[] dims = {DIM_X, DIM_Y};
int[][] dset_data = new int[DIM_X][DIM_Y];
H5Datatype typeInt = null;
// 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;
// Output the data to the screen.
System.out.println("Original Data:");
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("]");
}
// Create a new file using the default properties.
try {
file = new H5File(FILENAME, FileFormat.CREATE);
file.open();
}
catch (Exception e) {
e.printStackTrace();
}
// Create the dataset transfer property list and define the transform expression.
try {
dxpl_id = H5.H5Pcreate(HDF5Constants.H5P_DATASET_XFER);
if (dxpl_id >= 0)
H5.H5Pset_data_transform(dxpl_id, TRANSFORM);
}
catch (Exception e) {
e.printStackTrace();
}
// Create the datatype.
try {
typeInt =
new H5Datatype(Datatype.CLASS_INTEGER, Datatype.NATIVE, Datatype.NATIVE, Datatype.NATIVE);
}
catch (Exception e) {
e.printStackTrace();
}
// Create the dataset using the default properties. Unfortunately we must save as
// a native type or the transform operation will fail.
try {
dset = file.createScalarDS("/" + DATASETNAME, null, typeInt, dims, null, null, 0, null);
dataset_id = dset.open();
}
catch (Exception e) {
e.printStackTrace();
}
// Write the data to the dataset using the dataset transfer property list.
try {
if ((dataset_id >= 0) && (dxpl_id >= 0))
H5.H5Dwrite(dataset_id, HDF5Constants.H5T_NATIVE_INT, HDF5Constants.H5S_ALL,
HDF5Constants.H5S_ALL, dxpl_id, dset_data);
}
catch (Exception e) {
e.printStackTrace();
}
// End access to the dataset and release resources used by it.
try {
if (dxpl_id >= 0)
H5.H5Pclose(dxpl_id);
}
catch (Exception e) {
e.printStackTrace();
}
try {
if (dataset_id >= 0)
dset.close(dataset_id);
}
catch (Exception e) {
e.printStackTrace();
}
// Close the file.
try {
file.close();
}
catch (Exception e) {
e.printStackTrace();
}
}
private static void readData()
{
H5File file = null;
Dataset dset = null;
long dataset_id = -1;
long dxpl_id = -1;
int[] dset_data = new int[DIM_X * DIM_Y];
// Open an existing file using the default properties.
try {
file = new H5File(FILENAME, FileFormat.READ);
file.open();
}
catch (Exception e) {
e.printStackTrace();
}
// Open an existing dataset using the default properties.
try {
dset = (Dataset)file.get(DATASETNAME);
dataset_id = dset.open();
}
catch (Exception e) {
e.printStackTrace();
}
// Read the data using the default properties.
try {
dset.init();
dset_data = (int[])dset.getData();
}
catch (Exception e) {
e.printStackTrace();
}
// Output the data to the screen.
System.out.println("Data as written with transform '" + TRANSFORM + "'");
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 * DIM_Y + jndx] + " ");
System.out.println("]");
}
// Create the dataset transfer property list and define the transform expression.
try {
dxpl_id = H5.H5Pcreate(HDF5Constants.H5P_DATASET_XFER);
if (dxpl_id >= 0)
H5.H5Pset_data_transform(dxpl_id, RTRANSFORM);
}
catch (Exception e) {
e.printStackTrace();
}
// Read the data using the dataset transfer property list.
try {
if ((dataset_id >= 0) && (dxpl_id >= 0))
H5.H5Dread(dataset_id, HDF5Constants.H5T_NATIVE_INT, HDF5Constants.H5S_ALL,
HDF5Constants.H5S_ALL, dxpl_id, dset_data);
}
catch (Exception e) {
e.printStackTrace();
}
// Output the data to the screen.
System.out.println("Data as written with transform '" + TRANSFORM + "' and read with transform '" +
RTRANSFORM + "'");
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 * DIM_Y + jndx] + " ");
System.out.println("]");
}
// Close and release resources.
try {
if (dxpl_id >= 0)
H5.H5Pclose(dxpl_id);
}
catch (Exception e) {
e.printStackTrace();
}
try {
if (dataset_id >= 0)
dset.close(dataset_id);
}
catch (Exception e) {
e.printStackTrace();
}
try {
file.close();
}
catch (Exception e) {
e.printStackTrace();
}
}
public static void main(String[] args)
{
H5ObjectEx_D_Transform.writeData();
H5ObjectEx_D_Transform.readData();
}
}