nom.tam.fits.compression.provider.param.quant.ZScaleColumnParameter Maven / Gradle / Ivy
package nom.tam.fits.compression.provider.param.quant;
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import nom.tam.fits.compression.algorithm.quant.QuantizeOption;
import nom.tam.fits.compression.provider.param.base.CompressColumnParameter;
import nom.tam.fits.header.Compression;
/**
* (for internal use) The quantization scale value as recorded in a FITS compressed table column.
*/
final class ZScaleColumnParameter extends CompressColumnParameter {
ZScaleColumnParameter(QuantizeOption quantizeOption) {
super(Compression.ZSCALE_COLUMN, quantizeOption, double[].class);
}
@Override
public void getValueFromColumn(int index) {
getOption().setBScale(getColumnData() == null ? 1.0 : getColumnData()[index]);
}
@Override
public void setValueInColumn(int index) {
if (getColumnData() == null) {
return;
}
if (!Double.isNaN(getOption().getBScale())) {
getColumnData()[index] = getOption().getBScale();
}
}
}