public interface LSDoubleArrayExternalFunction
LSExternalArgumentValuesand must return a double array value. The argument values contain the values of the expressions passed to the function. A distinction is made between integer arguments (bool, int) and floating point arguments (double).
LSModel.createDoubleArrayExternalFunction(localsolver.LSDoubleArrayExternalFunction)or the dedicated shortcut
LSOperator.Call. The first operand must be your external function. The other operands must be LSExpressions. Their value will be made accessible to your external function through the
Note 1: Most of the time your external function will be
called when the solver is in state
LSState.Running. Do not attempt to
call any method of the solver (to retrieve statistics, values of LSExpressions
or whatever) in that state or an exception will be thrown.
Note 2: Your functions must be thread-safe. According to the
"nbThreads" parameter, LocalSolver can be multi-threaded. In that case, your
external functions must be thread safe. If you cannot guarantee the
thread-safety of your code, we strongly recommend you to limit the search of
LocalSolver to one thread with
Note 3: To optimize performance, you can return the same array object per thread from one call to another.
Note 4: You can provide additional data for your function (such
as the maximum number of evaluations) with the help of the
associated with the function (see
double call(LSExternalArgumentValues argumentValues)
argumentValues- Argument values containing the arguments of the function.