uk.ac.starlink.fits
Class VariableFitsTableSerializer

java.lang.Object
  uk.ac.starlink.fits.StandardFitsTableSerializer
      uk.ac.starlink.fits.VariableFitsTableSerializer

All Implemented Interfaces:

FitsTableSerializer

public class VariableFitsTableSerializer
extends StandardFitsTableSerializer

FitsTableSerializer which can write variable array-valued columns using the 'P' or 'Q' TFORM formatting characters.

Since:

10 Jul 2008

Constructor Summary

VariableFitsTableSerializer(StarTable table, StoragePolicy storagePolicy, boolean allowSignedByte)
Constructor.

Method Summary

nom.tam.fits.Header	getHeader() Returns a header suitable for the HDU which will contain the table.
void	set64BitMode(boolean useQ) Sets whether this serializer should use the 'P' descriptor (32-bit addressing into the heap) or the 'Q' descriptor (64-bit addressing into the heap) for variable-length array columns.
void	writeData(DataOutput out) Writes the HDU data for the table to an output stream.

Methods inherited from class uk.ac.starlink.fits.StandardFitsTableSerializer

getBadValue, getDimensions, getFormatChar, getRowCount

Methods inherited from class java.lang.Object

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

Constructor Detail

VariableFitsTableSerializer

public VariableFitsTableSerializer(StarTable table,
                                   StoragePolicy storagePolicy,
                                   boolean allowSignedByte)
                            throws IOException

Constructor.

Parameters:

table - table to write

storagePolicy - policy for acquiring byte array scratch buffers

allowSignedByte - if true, bytes written as FITS signed bytes (TZERO=-128), if false bytes written as signed shorts

Throws:

IOException

Method Detail

set64BitMode

public void set64BitMode(boolean useQ)

Sets whether this serializer should use the 'P' descriptor (32-bit addressing into the heap) or the 'Q' descriptor (64-bit addressing into the heap) for variable-length array columns. Normally Q is only used if the heap is larger than 2^31.

Parameters:

useQ - true for Q, false for P

getHeader

public nom.tam.fits.Header getHeader()
                              throws nom.tam.fits.HeaderCardException

Description copied from interface: FitsTableSerializer

Returns a header suitable for the HDU which will contain the table.

Specified by:

getHeader in interface FitsTableSerializer

Overrides:

getHeader in class StandardFitsTableSerializer

Returns:

header object

Throws:

nom.tam.fits.HeaderCardException

writeData

public void writeData(DataOutput out)
               throws IOException

Description copied from interface: FitsTableSerializer

Writes the HDU data for the table to an output stream.

Specified by:

writeData in interface FitsTableSerializer

Overrides:

writeData in class StandardFitsTableSerializer

Parameters:

out - destination stream

Throws:

IOException