Class OperationHistoryFactory


  • public final class OperationHistoryFactory
    extends Object

    This class is used to maintain the instance of the operation history that should be used by classes that access the undo or redo history and add undoable operations to the history.

    It is intended that an application can create an operation history appropriate for its needs and set it into this class. Otherwise, a default operation history will be created. The operation history may only be set one time. All classes that access an operations history use this class to obtain the correct instance.

    Since:
    3.1
    • Method Detail

      • getOperationHistory

        public static IOperationHistory getOperationHistory()
        Return the operation history to be used for managing undoable operations.
        Returns:
        the operation history to be used for executing, undoing, and redoing operations.
      • setOperationHistory

        public static void setOperationHistory​(IOperationHistory history)
        Set the operation history to be used for managing undoable operations. This method may only be called one time, and must be called before any request to get the history. Attempts to set the operation history will be ignored after it has been already set, or after a default one has been created.
        Parameters:
        history - the operation history to be used for executing, undoing, and redoing operations.