Package org.briarproject.nullsafety

Class NullSafety

  • @NotNullByDefault
public class NullSafety
extends java.lang.Object
    Helper method for ensuring null safety.

    • Constructor Summary

      Constructors 
      Constructor Description
      NullSafety()  

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static boolean equals​(java.lang.Object a, java.lang.Object b)
      Stand-in for Objects.equals() on older Java/Android versions.
      static void requireExactlyOneNull​(java.lang.Object a, java.lang.Object b)
      Checks that exactly one of the arguments is null.
      static <T> T requireNonNull​(T t)
      Stand-in for Objects.requireNonNull() on older Java/Android versions.
      static void requireNull​(java.lang.Object o)
      Checks that the argument is null.

      • Methods inherited from class java.lang.Object

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

    • Constructor Detail

      • NullSafety

        public NullSafety()

    • Method Detail

      • requireNonNull

        public static <T> T requireNonNull​(@Nullable
                                   T t)
        Stand-in for Objects.requireNonNull() on older Java/Android versions.
        Throws:
        java.lang.NullPointerException - If the argument is null.

      • requireExactlyOneNull

        public static void requireExactlyOneNull​(@Nullable
                                         java.lang.Object a,
                                         @Nullable
                                         java.lang.Object b)
        Checks that exactly one of the arguments is null.
        Throws:
        java.lang.AssertionError - If both or neither of the arguments are null

      • requireNull

        public static void requireNull​(@Nullable
                               java.lang.Object o)
        Checks that the argument is null.
        Throws:
        java.lang.AssertionError - If the argument is not null.

      • equals

        public static boolean equals​(@Nullable
                             java.lang.Object a,
                             @Nullable
                             java.lang.Object b)
        Stand-in for Objects.equals() on older Java/Android versions.
        Returns:
        True if both arguments are null, or if the arguments are the same object, or if neither argument is null and a.equals(b).