1 package nom.tam.fits.compression.provider.param.quant;
2
3 /*
4 * #%L
5 * nom.tam FITS library
6 * %%
7 * Copyright (C) 1996 - 2024 nom-tam-fits
8 * %%
9 * This is free and unencumbered software released into the public domain.
10 *
11 * Anyone is free to copy, modify, publish, use, compile, sell, or
12 * distribute this software, either in source code form or as a compiled
13 * binary, for any purpose, commercial or non-commercial, and by any
14 * means.
15 *
16 * In jurisdictions that recognize copyright laws, the author or authors
17 * of this software dedicate any and all copyright interest in the
18 * software to the public domain. We make this dedication for the benefit
19 * of the public at large and to the detriment of our heirs and
20 * successors. We intend this dedication to be an overt act of
21 * relinquishment in perpetuity of all present and future rights to this
22 * software under copyright law.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
27 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
28 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
29 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
30 * OTHER DEALINGS IN THE SOFTWARE.
31 * #L%
32 */
33
34 import nom.tam.fits.compression.algorithm.quant.QuantizeOption;
35 import nom.tam.fits.compression.provider.param.base.CompressColumnParameter;
36 import nom.tam.fits.header.Compression;
37
38 /**
39 * (<i>for internal use</i>) The quantization offset value as recorded in a FITS compressed table column.
40 */
41 final class ZZeroColumnParameter extends CompressColumnParameter<double[], QuantizeOption> {
42
43 ZZeroColumnParameter(QuantizeOption quantizeOption) {
44 super(Compression.ZZERO_COLUMN, quantizeOption, double[].class);
45 }
46
47 @Override
48 public void getValueFromColumn(int index) {
49 getOption().setBZero(getColumnData() == null ? 0.0 : getColumnData()[index]);
50 }
51
52 @Override
53 public void setValueInColumn(int index) {
54 if (getColumnData() == null) {
55 return;
56 }
57
58 if (!Double.isNaN(getOption().getBZero())) {
59 getColumnData()[index] = getOption().getBZero();
60 }
61 }
62
63 }