org.eso.fits
Class FitsData

java.lang.Object
  org.eso.fits.FitsData

Direct Known Subclasses:

FitsMatrix, FitsRGroup, FitsTable

public class FitsData
extends java.lang.Object

FitsData class represents a FITS data unit

Field Summary

protected int	bitpix
protected boolean	changeData
protected byte[]	dataArray
protected java.io.RandomAccessFile	dataFile
protected long	dataOffset
protected boolean	isRAFile
protected int[]	naxis
protected int	noGroup
protected int	noParm
protected long	size
protected int	type

Constructor Summary

FitsData(FitsHeader header, java.io.DataInput file, boolean sflag)
Constructor for FitsData class given a FITS header with associated data unit as a file.

FitsData(int bitpix, int[] nax)
Constructor for FitsData class given the size of the data matrix.

Method Summary

void	closeFile() Closes the associated data file
FitsHeader	getHeader() Create and return a minimum FITS header for data Matrix.
int[]	getNaxis() Gets the dimentions of the axes.
int	getNoAxes() Retrives number of axes defined for the data unit (ref.
int	getType() Gets FITS type of data unit.
void	writeFile(java.io.DataOutput file) Write data martix to DataOutput stream.

Methods inherited from class java.lang.Object

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

Field Detail

type

protected int type

naxis

protected int[] naxis

size

protected long size

bitpix

protected int bitpix

noParm

protected int noParm

noGroup

protected int noGroup

changeData

protected boolean changeData

dataFile

protected java.io.RandomAccessFile dataFile

dataOffset

protected long dataOffset

dataArray

protected byte[] dataArray

isRAFile

protected boolean isRAFile

Constructor Detail

FitsData

public FitsData(FitsHeader header,
                java.io.DataInput file,
                boolean sflag)
         throws FitsException

Constructor for FitsData class given a FITS header with associated data unit as a file.

Parameters:

header - FitsHeader object with the image header

file - RandomAccess file positioned at the start of the associated data unit

sflag - Flag for storing data matrix internally

Throws:

FitsException

FitsData

public FitsData(int bitpix,
                int[] nax)
         throws FitsException

Constructor for FitsData class given the size of the data matrix. An array equal to the size of the data matrix will be allocated.

Parameters:

bitpix - value of FITS BITPIX keyword bits/pixel

nax - Integer array defining the dimensions of the data matrix or for BINTABLE the heap size

Throws:

FitsException

Method Detail

getHeader

public FitsHeader getHeader()

Create and return a minimum FITS header for data Matrix.

writeFile

public void writeFile(java.io.DataOutput file)
               throws java.io.IOException,
                      FitsException

Write data martix to DataOutput stream.

Parameters:

file - DataOutput stream to which data are written

Throws:

IOException, - FitsException

java.io.IOException

FitsException

closeFile

public void closeFile()

Closes the associated data file

getNoAxes

public int getNoAxes()

Retrives number of axes defined for the data unit (ref. NAXIS)

getType

public int getType()

Gets FITS type of data unit. This is specified in the assocated header such as Fits.IMAGE or Fits.BTABLE

getNaxis

public int[] getNaxis()

Gets the dimentions of the axes. This is defined for the data unit by the NAXISn keywords.