Package org.eclipse.jdt.annotation

Enum Class DefaultLocation

java.lang.Object
java.lang.Enum<DefaultLocation>
org.eclipse.jdt.annotation.DefaultLocation
All Implemented Interfaces:
Serializable, Comparable<DefaultLocation>, Constable
public enum DefaultLocation extends Enum<DefaultLocation>
Locations that can be affected by a NonNullByDefault annotation. Each constant of this enum describes a specific kind of type use. Wildcards and the use of type variables are always excluded from NonNullByDefault.
Since:
2.0

  • Enum Constant Details

    • PARAMETER

      public static final DefaultLocation PARAMETER
      Defines that a given NonNullByDefault annotation should affect all unannotated parameters of any method or constructor within the scope of the annotated declaration.

      Example

       @NonNullByDefault(PARAMETER)
 interface X {
     void print(Number n);
 }

      Here Number will be interpreted as @NonNull Number.

    • RETURN_TYPE

      public static final DefaultLocation RETURN_TYPE
      Defines that a given NonNullByDefault annotation should affect all unannotated method return types within the scope of the annotated declaration.

      Example

       @NonNullByDefault(RETURN_TYPE)
 interface X {
     Number getNumber();
 }

      Here Number will be interpreted as @NonNull Number.

    • FIELD

      public static final DefaultLocation FIELD
      Defines that a given NonNullByDefault annotation should affect all unannotated field types within the scope of the annotated declaration.

      Example

       @NonNullByDefault(FIELD)
 class X {
     Number number = Integer.MAX_VALUE;
 }

      Here Number will be interpreted as @NonNull Number.

    • TYPE_PARAMETER

      public static final DefaultLocation TYPE_PARAMETER
      Defines that a given NonNullByDefault annotation should affect all unannotated type parameter declarations within the scope of the annotated declaration.

      Example

       @NonNullByDefault(TYPE_PARAMETER)
 class X {
     <T> T identity(T t) { return t; }
 }

      Here <T> will be interpreted as <@NonNull T>.

    • TYPE_BOUND

      public static final DefaultLocation TYPE_BOUND
      Defines that a given NonNullByDefault annotation should affect all unannotated explicit type bounds within the scope of the annotated declaration. A type bound of type Object is never considered as an explicit bound, i.e., T extends Object is never affected by NonNullByDefault.

      Example

       @NonNullByDefault(TYPE_BOUND)
 interface X {
     <T extends Number> void process(T t, List<? super Number> l);
 }

      Here both occurrences of Number will be interpreted as @NonNull Number.

    • TYPE_ARGUMENT

      public static final DefaultLocation TYPE_ARGUMENT
      Defines that a given NonNullByDefault annotation should affect all unannotated type arguments within the scope of the annotated declaration (except wildcards and type variables).

      Example

       @NonNullByDefault(TYPE_ARGUMENT)
 interface X<T> {
     void process(List<T> tl, List<Number> nl);
 }

      Here Number will be interpreted as @NonNull Number, but the use of type variable T is not affected.

    • ARRAY_CONTENTS

      public static final DefaultLocation ARRAY_CONTENTS
      Defines that a given NonNullByDefault annotation should affect all unannotated array components within the scope of the annotated declaration.

      Example

       @NonNullByDefault(ARRAY_CONTENTS)
 interface X {
     Number[] n1;
     Number[][] n2;
 }

      These declarations are interpreted as: 

          @NonNull Number [] n1;
    @NonNull Number [] @NonNull[] n2;

      I.e., both fields can still be null (see the unannotated left-most pair of brackets) but none of the contents of these arrays is allowed to be null (at any dimension).

  • Method Details

    • values

      public static DefaultLocation[] values()
      Returns an array containing the constants of this enum class, in the order they are declared.
      Returns:
      an array containing the constants of this enum class, in the order they are declared

    • valueOf

      public static DefaultLocation valueOf(String name)
      Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (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:
      IllegalArgumentException - if this enum class has no constant with the specified name
      NullPointerException - if the argument is null