Package nom.tam.fits

Class NullDataHDU

java.lang.Object

nom.tam.fits.BasicHDU<ImageData>

nom.tam.fits.ImageHDU

nom.tam.fits.NullDataHDU

All Implemented Interfaces:

FitsElement

public class NullDataHDU
extends ImageHDU

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.

Since:

1.18

Author:

Attila Kovacs

See Also:

• NullData

Field Summary

Fields inherited from class nom.tam.fits.BasicHDU

BITPIX_BYTE, BITPIX_DOUBLE, BITPIX_FLOAT, BITPIX_INT, BITPIX_LONG, BITPIX_SHORT

Constructor Summary

Constructors

Constructor	Description
NullDataHDU()	Instantiates a new HDU with a default header and no associated data.
NullDataHDU(Header myHeader)	Instantiates a new HDU with only the supplied header and no associated data.

Method Summary

Modifier and Type	Method	Description
NullData	getData()	Returns the data component of this HDU.
void	info(PrintStream stream)	Print out some information about this HDU.

Methods inherited from class nom.tam.fits.ImageHDU

encapsulate, getBlankValue, getBScale, getBUnit, getBZero, getTiler, isData, isHeader, manufactureData, manufactureHeader

Methods inherited from class nom.tam.fits.BasicHDU

addValue, addValue, addValue, addValue, addValue, addValue, addValue, addValue, calcChecksum, card, getAuthor, getAxes, getBitpix, getBitPix, getCreationDate, getDummyHDU, getEpoch, getEquinox, getFileOffset, getGroupCount, getHeader, getInstrument, getKernel, getMaximumValue, getMinimumValue, getObject, getObservationDate, getObserver, getOrigin, getParameterCount, getReference, getSize, getStoredChecksum, getStoredDatasum, getTelescope, getTrimmedString, getTrimmedString, read, reset, rewrite, rewriteable, setChecksum, verifyDataIntegrity, verifyIntegrity, write

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

NullDataHDU

public NullDataHDU()

Instantiates a new HDU with a default header and no associated data.

NullDataHDU

public NullDataHDU(Header myHeader)

Instantiates a new HDU with only the supplied header and no associated data.

Parameters:

myHeader - the FITS header for this HDU

Method Details

getData

public NullData getData()

Description copied from class: BasicHDU

Returns the data component of this HDU.

Overrides:

getData in class BasicHDU<ImageData>

Returns:

the associated Data object

info

public void info(PrintStream stream)

Description copied from class: BasicHDU

Print out some information about this HDU.

Overrides:

info in class ImageHDU

Parameters:

stream - the printstream to write the info on