Class AngleColumnConverter

java.lang.Object
uk.ac.starlink.topcat.ColumnConverter
uk.ac.starlink.topcat.AngleColumnConverter
public abstract class AngleColumnConverter extends ColumnConverter
ColumnConverter that knows how to deal with angles. It provides an additional method, angleExpression(String, AngleColumnConverter.Unit), that's useful when assembling stilts command lines.
Since:
18 Sep 2024
Author:
Mark Taylor

  • Constructor Details

    • AngleColumnConverter

      protected AngleColumnConverter(String name)
      Constructor.
      Parameters:
      name - converter name, will appear in GUI

  • Method Details

    • angleExpression

      public abstract String angleExpression(String inExpr, AngleColumnConverter.Unit toUnit)
      Returns a JEL expression that converts an an input value suitable for input to this converter to a value in the supplied angle unit.
      Parameters:
      inExpr - input expression, assumed JEL-friendly
      toUnit - output angular unit
      Returns:
      JEL expression evaluating to angular value in supplied unit

    • toString

      public String toString()
      Description copied from class: ColumnConverter
      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.
      Specified by:
      toString in class ColumnConverter

    • toRadianConverter

      public static AngleColumnConverter toRadianConverter(AngleColumnConverter.Unit fromUnit)
      Creates a converter that converts to radians from a given angular unit.
      Parameters:
      fromUnit - input unit
      Returns:
      converter

    • angleExpression

      public static String angleExpression(AngleColumnConverter.Unit fromUnit, AngleColumnConverter.Unit toUnit, String inExpr)
      Converts a JEL expression assumed in a given input unit to an expression that will evaluate to the value in the given output unit.
      Parameters:
      fromUnit - input angular unit
      toUnit - output angular unit
      inExpr - input expression, assumed JEL-friendly
      Returns:
      compact JEL expression