Class Snapshot

    • Constructor Summary

      Constructors 
      Constructor Description
      Snapshot()  
    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      boolean isEqualTo​(ISnapshot other)
      Indicates whether some other snapshot is "equal to" this one.
      protected java.lang.Boolean predictEquality​(Snapshot other)
      Predicts whether this snapshot is equal to the given snapshot without actually obtaining snapshot contents.
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Constructor Detail

      • Snapshot

        public Snapshot()
    • Method Detail

      • isEqualTo

        public final boolean isEqualTo​(ISnapshot other)
        Description copied from interface: ISnapshot
        Indicates whether some other snapshot is "equal to" this one.

        If snapshots are equal they have equal contents (or had had equal contents before one or both of them expired). However, the converse is not necessarily true.

        Note that snapshots which are equal but not identical may become unequal when one or both of them expire, and may become equal again in case they return to the valid (unexpired) state.

        Implementations of this method must be reflexive, symmetric and transitive on non-null references.

        Specified by:
        isEqualTo in interface ISnapshot
        Parameters:
        other - a snapshot to compare or null
        Returns:
        true if the snapshots are equal, and false otherwise
      • predictEquality

        protected java.lang.Boolean predictEquality​(Snapshot other)
        Predicts whether this snapshot is equal to the given snapshot without actually obtaining snapshot contents. Must return null if cannot tell for sure. Any non-null result must meet the contract of ISnapshot.isEqualTo(ISnapshot).
        Parameters:
        other - the other snapshot (not null and not identical to the receiver)
        Returns:
        true if the snapshots are predicted to be equal, false if the snapshots are predicted to be unequal, and null if there is no prediction