Class FitsTableWriter

  • All Implemented Interfaces:
    uk.ac.starlink.table.MultiStarTableWriter, uk.ac.starlink.table.StarTableWriter

    public class FitsTableWriter
    extends AbstractFitsTableWriter
    Handles writing of a StarTable in FITS binary format. Not all columns can be written to a FITS table, only those ones whose contentClass is in the following list:
    • Boolean
    • Character
    • Byte
    • Short
    • Integer
    • Long
    • Float
    • Double
    • Character
    • String
    • boolean[]
    • char[]
    • byte[]
    • short[]
    • int[]
    • long[]
    • float[]
    • double[]
    • String[]
    In all other cases a warning message will be logged and the column will be ignored for writing purposes.

    Output is currently to fixed-width columns only. For StarTable columns of variable size, a first pass is made through the table data to determine the largest size they assume, and the size in the output table is set to the largest of these. Excess space is padded with some sort of blank value (NaN for floating point values, spaces for strings, zero-like values otherwise).

    Author:
    Mark Taylor (Starlink)
    • Constructor Detail

      • FitsTableWriter

        public FitsTableWriter()
        Default constructor.
      • FitsTableWriter

        public FitsTableWriter​(java.lang.String name,
                               boolean allowSignedByte,
                               WideFits wide)
        Custom constructor.
        Parameters:
        name - writer name
        allowSignedByte - if true, bytes written as FITS signed bytes (TZERO=-128), if false bytes written as signed shorts
        wide - convention for representing over-wide tables; null to avoid this convention
    • Method Detail

      • looksLikeFile

        public boolean looksLikeFile​(java.lang.String location)
        Returns true if location ends with something like ".fit" or ".fits" or ".fts".
        Parameters:
        location - filename
        Returns:
        true if it sounds like a fits file
      • createSerializer

        protected FitsTableSerializer createSerializer​(uk.ac.starlink.table.StarTable table)
                                                throws java.io.IOException
        Description copied from class: AbstractFitsTableWriter
        Provides a suitable serializer for a given table. Note this should throw an IOException if it can be determined that the submitted table cannot be written by this writer, for instance if it has too many columns.
        Specified by:
        createSerializer in class AbstractFitsTableWriter
        Parameters:
        table - table to serialize
        Returns:
        FITS serializer
        Throws:
        java.io.IOException - if the table can't be written