Package org.apache.openjpa.util

Class ArrayStateImage

  • public class ArrayStateImage
extends Object
    Utilities for dealing with a simple state image consisting of an Object[] of field values with one extra index containing a BitSet of loaded fields. This simplistic state image might be used for optimistic versioning.
    Author:
    Abe White

    • Constructor Detail

      • ArrayStateImage

        public ArrayStateImage()

    • Method Detail

      • newImage

        public static Object[] newImage​(int numFields)
        Create a new state image for the given number of fields.

      • isImage

        public static boolean isImage​(Object obj)
        Return true if the given version object appears to be an array state image.

      • getLoaded

        public static BitSet getLoaded​(Object[] state)
        Get the loaded mask from a state image.

      • setLoaded

        public static void setLoaded​(Object[] state,
                             BitSet loaded)
        Set the loaded mask into a state image.

      • clone

        public static Object[] clone​(Object[] state)
        Clone a state array.

      • sameVersion

        public static boolean sameVersion​(Object[] state1,
                                  Object[] state2)
        Return whether the given images are equivalent from an optimistic locking perspective.