Constructor Detail

• ColumnConverter

  public ColumnConverter()

Method Detail

• convertValue

  public abstract java.lang.Object convertValue​(java.lang.Object value)

  Converts a value from its raw value to the value required for a particular purpose.

  Parameters:

  value - raw value

  Returns:

  converted value

• toString

  public abstract java.lang.String toString()

  Provides a user-understandable description of what this converter does. Must be enough to distinguish it from distinct converters which might do the same sort of thing.

  Overrides:

  toString in class java.lang.Object

• getConverters

  public static ColumnConverter[] getConverters​(uk.ac.starlink.table.ValueInfo info)

  Returns a set of converters appropriate for a given ValueInfo. If only one converter is returned, it's a unit converter (equivalent to a no-op).

  Parameters:

  info - object describing the data which is required

  Returns:

  a set of alternative converters which could be used to modify the values in a given column