Enum ZeroToNullConverter

  • All Implemented Interfaces:
    java.io.Serializable, java.lang.Comparable<ZeroToNullConverter>, Converter<java.lang.Number,​java.lang.Object>

    public enum ZeroToNullConverter
    extends java.lang.Enum<ZeroToNullConverter>
    implements Converter<java.lang.Number,​java.lang.Object>
    Converts instances of Number that are zero to null.
    Author:
    Eric Nielsen
    • Enum Constant Summary

      Enum Constants 
      Enum Constant Description
      INSTANCE  
    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      boolean canConvert​(java.lang.Class sourceClass, java.lang.Class destinationClass)
      Returns true if this converter can convert instances of sourceClass to destinationClass.
      java.lang.Object convert​(java.lang.Number source)
      Converts instance of S to T.
      static ZeroToNullConverter instance()  
      static ZeroToNullConverter valueOf​(java.lang.String name)
      Returns the enum constant of this type with the specified name.
      static ZeroToNullConverter[] values()
      Returns an array containing the constants of this enum type, in the order they are declared.
      • Methods inherited from class java.lang.Enum

        clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf
      • Methods inherited from class java.lang.Object

        getClass, notify, notifyAll, wait, wait, wait
    • Method Detail

      • values

        public static ZeroToNullConverter[] values()
        Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:
        for (ZeroToNullConverter c : ZeroToNullConverter.values())
            System.out.println(c);
        
        Returns:
        an array containing the constants of this enum type, in the order they are declared
      • valueOf

        public static ZeroToNullConverter valueOf​(java.lang.String name)
        Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)
        Parameters:
        name - the name of the enum constant to be returned.
        Returns:
        the enum constant with the specified name
        Throws:
        java.lang.IllegalArgumentException - if this enum type has no constant with the specified name
        java.lang.NullPointerException - if the argument is null
      • canConvert

        public boolean canConvert​(java.lang.Class sourceClass,
                                  java.lang.Class destinationClass)
        Description copied from interface: Converter
        Returns true if this converter can convert instances of sourceClass to destinationClass.
        Specified by:
        canConvert in interface Converter<java.lang.Number,​java.lang.Object>
        Parameters:
        sourceClass - source Class
        destinationClass - destination Class
        Returns:
        true if sourceClass is a subclass of Number
      • convert

        public java.lang.Object convert​(java.lang.Number source)
        Description copied from interface: Converter
        Converts instance of S to T.
        Specified by:
        convert in interface Converter<java.lang.Number,​java.lang.Object>
        Parameters:
        source - instance of String
        Returns:
        null if source.intValue() is zero, source otherwise