nom.tam.fits.compression.provider.param.hcompress.HCompressScaleParameter Maven / Gradle / Ivy

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package nom.tam.fits.compression.provider.param.hcompress;

import nom.tam.fits.Header;

/*
 * #%L
 * nom.tam FITS library
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 * Copyright (C) 1996 - 2024 nom-tam-fits
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 * This is free and unencumbered software released into the public domain.
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 * Anyone is free to copy, modify, publish, use, compile, sell, or
 * distribute this software, either in source code form or as a compiled
 * binary, for any purpose, commercial or non-commercial, and by any
 * means.
 *
 * In jurisdictions that recognize copyright laws, the author or authors
 * of this software dedicate any and all copyright interest in the
 * software to the public domain. We make this dedication for the benefit
 * of the public at large and to the detriment of our heirs and
 * successors. We intend this dedication to be an overt act of
 * relinquishment in perpetuity of all present and future rights to this
 * software under copyright law.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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import nom.tam.fits.HeaderCard;
import nom.tam.fits.HeaderCardException;
import nom.tam.fits.compression.algorithm.hcompress.HCompressorOption;
import nom.tam.fits.compression.provider.param.base.CompressHeaderParameter;
import nom.tam.fits.header.Compression;

/**
 * (for internal use) The HCompress scale parameter as recorded in the FITS header.
 */
public final class HCompressScaleParameter extends CompressHeaderParameter {

    /**
     * @param hCompressorOption
     */
    HCompressScaleParameter(HCompressorOption hCompressorOption) {
        super(Compression.SCALE, hCompressorOption);
    }

    @Override
    public void getValueFromHeader(Header header) throws HeaderCardException {
        HeaderCard value = findZVal(header);
        if (value != null) {
            getOption().setScale(value.getValue(Double.class, 0.0));
        }
    }

    @Override
    public void setValueInHeader(Header header) throws HeaderCardException {
        int zvalIndex = nextFreeZVal(header);
        header.addValue(Compression.ZNAMEn.n(zvalIndex), getName());
        header.addValue(Compression.ZVALn.n(zvalIndex), getOption().getScale());
    }
}