Class ColFitsPlusTableWriter

java.lang.Object
uk.ac.starlink.table.StreamStarTableWriter
uk.ac.starlink.fits.AbstractFitsTableWriter
uk.ac.starlink.votable.VOTableFitsTableWriter
uk.ac.starlink.votable.ColFitsPlusTableWriter
All Implemented Interfaces:
uk.ac.starlink.table.Documented, uk.ac.starlink.table.formats.DocumentedIOHandler, uk.ac.starlink.table.MultiStarTableWriter, uk.ac.starlink.table.StarTableWriter

public class ColFitsPlusTableWriter extends VOTableFitsTableWriter implements uk.ac.starlink.table.formats.DocumentedIOHandler
Handles writing of a StarTable in a column-oriented FITS binary table format. The table data is stored in a BINTABLE extension which has a single row; each cell in this row contains the data for an entire column of the represented table. The primary HDU is a byte array containing a VOTable representation of the table metadata, as for FitsPlusTableWriter.

This rather specialised format may provide good performance for certain operations on very large, especially very wide, tables. Although it is FITS and can therefore be used in principle for data interchange, in practice most non-STIL processors are unlikely to be able to do much useful with it.

Since:
21 Jun 2006
Author:
Mark Taylor
  • Constructor Summary

    Constructors
    Constructor
    Description
    Default constructor.
    ColFitsPlusTableWriter(String name, uk.ac.starlink.fits.WideFits wide)
    Deprecated.
    allows some configuration options but not others; use no-arg constructor and configuration methods instead
  • Method Summary

    Modifier and Type
    Method
    Description
    protected uk.ac.starlink.fits.FitsTableSerializer
    createSerializer(uk.ac.starlink.table.StarTable table)
     
    boolean
     
    protected uk.ac.starlink.fits.CardImage[]
    Returns implementation-specific header cards to be added to the Primary HDU of FITS files written by this writer.
     
     
    protected boolean
    isMagic(int icard, String key, Object value)
    Tests a header card to see if it looks like part of the magic number for the format written by this handler.
    boolean
     

    Methods inherited from class uk.ac.starlink.votable.VOTableFitsTableWriter

    isMagic, setAllowSignedByte, setVotableVersion, writeStarTables

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

    getAllowSignedByte, getAllowZeroLengthString, getConfig, getCurrentDate, getFormatName, getMetadataCards, getMimeType, getPadCharacter, getWide, getWriteDate, setAllowZeroLengthString, setFormatName, setPadCharacter, setWide, setWriteDate, writePrimaryHDU, writeStarTable, writeStarTables, writeTableHDU

    Methods inherited from class uk.ac.starlink.table.StreamStarTableWriter

    writeStarTable, writeStarTable

    Methods inherited from class java.lang.Object

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

    Methods inherited from interface uk.ac.starlink.table.formats.DocumentedIOHandler

    readText

    Methods inherited from interface uk.ac.starlink.table.StarTableWriter

    writeStarTable
  • Constructor Details

    • ColFitsPlusTableWriter

      public ColFitsPlusTableWriter()
      Default constructor.
    • ColFitsPlusTableWriter

      @Deprecated public ColFitsPlusTableWriter(String name, uk.ac.starlink.fits.WideFits wide)
      Deprecated.
      allows some configuration options but not others; use no-arg constructor and configuration methods instead
      Deprecated custom constructor.
  • Method Details

    • getExtensions

      public String[] getExtensions()
      Specified by:
      getExtensions in interface uk.ac.starlink.table.formats.DocumentedIOHandler
    • looksLikeFile

      public boolean looksLikeFile(String location)
      Specified by:
      looksLikeFile in interface uk.ac.starlink.table.StarTableWriter
    • docIncludesExample

      public boolean docIncludesExample()
      Specified by:
      docIncludesExample in interface uk.ac.starlink.table.formats.DocumentedIOHandler
    • getXmlDescription

      public String getXmlDescription()
      Specified by:
      getXmlDescription in interface uk.ac.starlink.table.Documented
    • getCustomPrimaryHeaderCards

      protected uk.ac.starlink.fits.CardImage[] getCustomPrimaryHeaderCards()
      Description copied from class: VOTableFitsTableWriter
      Returns implementation-specific header cards to be added to the Primary HDU of FITS files written by this writer.
      Specified by:
      getCustomPrimaryHeaderCards in class VOTableFitsTableWriter
      Returns:
      header cards
    • isMagic

      protected boolean isMagic(int icard, String key, Object value)
      Description copied from class: VOTableFitsTableWriter
      Tests a header card to see if it looks like part of the magic number for the format written by this handler. The VOTableFitsTableWriter implementation tests that the first four cards read:
          SIMPLE = T
          BITPIX = 8
          NAXIS  = 1
          NAXIS1 = ???
       
      Subclasses may override this to add tests for later cards (as provided by VOTableFitsTableWriter.getCustomPrimaryHeaderCards()).
      Overrides:
      isMagic in class VOTableFitsTableWriter
      Parameters:
      icard - 0-based card index
      key - card name
      value - card value
      Returns:
      true iff the presented card is one that could have been written by this writer
    • createSerializer

      protected uk.ac.starlink.fits.FitsTableSerializer createSerializer(uk.ac.starlink.table.StarTable table) throws IOException
      Specified by:
      createSerializer in class uk.ac.starlink.fits.AbstractFitsTableWriter
      Throws:
      IOException