Initializing help system before first use

# XpressProblem.CallbackAPI.PreNodeCallback

- com.dashoptimization.objects.XpressProblem.CallbackAPI.PreNodeCallback

- Enclosing class:
    XpressProblem.CallbackAPI
  Functional Interface:
    This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

      @FunctionalInterface
      public static interface XpressProblem.CallbackAPI.PreNodeCallback

  Interface to capture `prenode` events in an `XpressProblem`. More details about `prenode` events can be found in the documentation of the corresponding C callback (the `p_infeasible` output argument of the C callback becomes the return value of the interface function).
  See Also:
    C documentation of XPRSaddcbprenode()

- - ### Method Summary

    Modifier and Type | Method | Description
    --- | --- | ---
    `int` | `preNode​(XpressProblem cbprob)` | Handle a `prenode` event.

- - ### Method Detail

    - #### preNode

          int preNode​(XpressProblem cbprob)

      Handle a `prenode` event. More details about `prenode` events can be found in the documentation of the corresponding C callback (the `p_infeasible` output argument of the C callback becomes the return value of this function).
      Parameters:
        `cbprob` - The problem passed to the callback function, `prenode`.
      Returns:
        The feasibility status. If set to a nonzero value by the user, the current node will be declared infeasible by the Optimizer.
      See Also:
        C documentation of XPRSaddcbprenode()

Parent Topic Interface Summary

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