Package groovy.transform

Class Undefined

java.lang.Object
groovy.transform.Undefined
public final class Undefined extends Object
Java doesn't allow you to have null as an attribute value. It wants you to indicate what you really mean by null, so that is what we do here - as ugly as it is.

  • Nested Class Summary

    Nested Classes
    Modifier and Type
    Class
    Description
    static final class 
    Undefined.CLASS
    Sentinel type used when an annotation member has no explicit class value.
    static final class 
    Undefined.EXCEPTION
    Sentinel exception type used when an annotation member has no explicit exception value.

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    static final String
    STRING
    Sentinel string value used when an annotation member has no explicit string value.

  • Method Summary

    Modifier and Type
    Method
    Description
    static boolean
    isUndefined(String other)
    Tests whether the supplied string is the undefined sentinel.
    static boolean
    isUndefined(ClassNode other)
    Tests whether the supplied class node is the undefined class sentinel.
    static boolean
    isUndefinedException(ClassNode other)
    Tests whether the supplied class node is the undefined exception sentinel.

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Field Details

    • STRING

      public static final String STRING
      Sentinel string value used when an annotation member has no explicit string value.
      See Also:

  • Method Details

    • isUndefined

      public static boolean isUndefined(String other)
      Tests whether the supplied string is the undefined sentinel.
      Parameters:
      other - the value to test
      Returns:
      true if the value is undefined

    • isUndefined

      public static boolean isUndefined(ClassNode other)
      Tests whether the supplied class node is the undefined class sentinel.
      Parameters:
      other - the class node to test
      Returns:
      true if the value is undefined

    • isUndefinedException

      public static boolean isUndefinedException(ClassNode other)
      Tests whether the supplied class node is the undefined exception sentinel.
      Parameters:
      other - the class node to test
      Returns:
      true if the value is undefined