/**
* A random search optimizer.
*/
void my_optimizer(coco_problem_t *problem) {
const size_t budget = 2;
coco_random_state_t *rng = coco_random_new(0xdeadbeef);
const double *lbounds = coco_problem_get_smallest_values_of_interest(problem);
const double *ubounds = coco_problem_get_largest_values_of_interest(problem);
size_t dimension = coco_problem_get_dimension(problem);
size_t number_of_objectives = coco_problem_get_number_of_objectives(problem);
double *x = coco_allocate_vector(dimension);
double *y = coco_allocate_vector(number_of_objectives);
double range;
size_t i, j;
for (i = 0; i < budget; ++i) {
for (j = 0; j < dimension; ++j) {
range = ubounds[j] - lbounds[j];
x[j] = lbounds[j] + coco_random_uniform(rng) * range;
}
coco_evaluate_function(problem, x, y);
}
coco_random_free(rng);
coco_free_memory(x);
coco_free_memory(y);
}
/* The gateway function */
void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[])
{
long long *ref;
coco_problem_t *problem = NULL;
int nb_dim;
const double *res;
int i;
double *v; /* intermediate variable that aloows to set plhs[0] */
/* check for proper number of arguments */
if(nrhs!=1) {
mexErrMsgIdAndTxt("cocoProblemGetLargestValuesOfInterest:nrhs","One input required.");
}
/* get the problem */
ref = (long long *)mxGetData(prhs[0]);
problem = (coco_problem_t *)(*ref);
nb_dim = coco_problem_get_dimension(problem);
plhs[0] = mxCreateDoubleMatrix(1, (mwSize)nb_dim, mxREAL);
v = mxGetPr(plhs[0]);
/* call coco_problem_get_largest_values_of_interest(...) */
res = coco_problem_get_largest_values_of_interest(problem);
for (i = 0; i < nb_dim; i++){
v[i] = res[i];
}
}
/*
* Class: CocoJNI
* Method: cocoProblemGetLargestValuesOfInterest
* Signature: (J)[D
*/
JNIEXPORT jdoubleArray JNICALL Java_org_moeaframework_problem_BBOB2016_CocoJNI_cocoProblemGetLargestValuesOfInterest
(JNIEnv *jenv, jclass interface_cls, jlong jproblem_pointer) {
coco_problem_t *problem = NULL;
const double *result;
jdoubleArray jresult;
jint dimension;
/* This test is both to prevent warning because interface_cls was not used and to check for exceptions */
if (interface_cls == NULL) {
jclass Exception = (*jenv)->FindClass(jenv, "java/lang/Exception");
(*jenv)->ThrowNew(jenv, Exception, "Exception in cocoProblemGetLargestValuesOfInterest\n");
}
problem = (coco_problem_t *) jproblem_pointer;
dimension = (int) coco_problem_get_dimension(problem);
result = coco_problem_get_largest_values_of_interest(problem);
/* Prepare the return value */
jresult = (*jenv)->NewDoubleArray(jenv, dimension);
(*jenv)->SetDoubleArrayRegion(jenv, jresult, 0, dimension, result);
return jresult;
}
