nom.tam.fits.NullDataHDU Maven / Gradle / Ivy
package nom.tam.fits;
/*-
* #%L
* nom.tam FITS library
* %%
* 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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* 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
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*/
import java.io.PrintStream;
/**
* A class of HDU that contains only a header only with no associated data. Such HDUs are commonly used as the primary
* HDU in FITS files where the leading data is not an image, since only images may constitute the primary HDU.
*
* @author Attila Kovacs
*
* @since 1.18
*
* @see NullData
*/
@SuppressWarnings("deprecation")
public class NullDataHDU extends ImageHDU {
/**
* Instantiates a new HDU with a default header and no associated data.
*/
public NullDataHDU() {
super(new Header(), new NullData());
getData().fillHeader(getHeader());
}
@Override
public NullData getData() {
return (NullData) super.getData();
}
/**
* Instantiates a new HDU with only the supplied header and no associated data.
*
* @param myHeader the FITS header for this HDU
*/
public NullDataHDU(Header myHeader) {
super(myHeader, new NullData());
getData().fillHeader(getHeader());
}
@Override
public void info(PrintStream stream) {
stream.println(" Header Only");
}
}