Enum VersionStrategy

  • All Implemented Interfaces:
    java.io.Serializable, java.lang.Comparable<VersionStrategy>

    public enum VersionStrategy
    extends java.lang.Enum<VersionStrategy>
    Three common strategies for versioning instances are supported by standard metadata. These include state-comparison, timestamp, and version-number.
    • date-time involves comparing the value in a date-time column in the table. The first time in a transaction the row is updated, the timestamp value is updated to the current time.
    • version-number involves comparing the value in a numeric column in the table. The first time in a transaction the row is updated, the version-number column value is incremented.
    • state-image involves comparing the values in specific columns to determine if the database row was changed.
    • Field Summary

      Fields 
      Modifier and Type Field Description
      (package private) java.lang.String name  
    • Constructor Summary

      Constructors 
      Modifier Constructor Description
      private VersionStrategy​(java.lang.String name)  
    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      static VersionStrategy getVersionStrategy​(java.lang.String value)
      Return VersionStrategy from String.
      java.lang.String toString()  
      static VersionStrategy valueOf​(java.lang.String name)
      Returns the enum constant of this type with the specified name.
      static VersionStrategy[] values()
      Returns an array containing the constants of this enum type, in the order they are declared.
      • Methods inherited from class java.lang.Enum

        clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, valueOf
      • Methods inherited from class java.lang.Object

        getClass, notify, notifyAll, wait, wait, wait
    • Field Detail

      • name

        java.lang.String name
    • Constructor Detail

      • VersionStrategy

        private VersionStrategy​(java.lang.String name)
    • Method Detail

      • values

        public static VersionStrategy[] values()
        Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:
        for (VersionStrategy c : VersionStrategy.values())
            System.out.println(c);
        
        Returns:
        an array containing the constants of this enum type, in the order they are declared
      • valueOf

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

        public java.lang.String toString()
        Overrides:
        toString in class java.lang.Enum<VersionStrategy>
      • getVersionStrategy

        public static VersionStrategy getVersionStrategy​(java.lang.String value)
        Return VersionStrategy from String.
        Parameters:
        value - strategy attribute value
        Returns:
        Instance of VersionStrategy. If value invalid, return null.