Class ValueCodec

java.lang.Object
uk.ac.starlink.topcat.join.ValueCodec

public abstract class ValueCodec extends Object
Encodes and decodes values for a ValueInfo between different string representations.
Since:
7 Sep 2004
Author:
Mark Taylor (Starlink)
  • Constructor Details

    • ValueCodec

      public ValueCodec()
  • Method Details

    • unformatString

      public abstract Object unformatString(String text)
      Decodes a string to give a value in the context of this codec.
      Parameters:
      text - string representation of the value
      Returns:
      value object as read from text
    • formatValue

      public abstract String formatValue(Object value, int maxLength)
      Returns a string representation of a given value in the context of this codec. The returned string should be no longer than a given maximum length.
      Parameters:
      value - value object
      maxLength - maximum number of characters in the returned string
      Returns:
      string representation of value
    • getCodecs

      public static ValueCodec[] getCodecs(uk.ac.starlink.table.ValueInfo info)
      Returns an array of ValueCodec objects suitable for representing the values pertaining to a given ValueInfo object. The returned array will contain at least one element, which just gets its implementation from the behaviour of the submitted ValueInfo itself, but it may contain more than this, for instance ones relating to different units.
      Parameters:
      info - description of the value to represent
      Returns:
      array of value codecs for info, containing at least one element