com::typesafe::config::impl::Path* com::typesafe::config::impl::PropertiesParser::pathFromPropertyKey(::java::lang::String* key)
{
clinit();
auto last = lastElement(key);
auto exceptLast = exceptLastElement(key);
auto path = new Path(last, nullptr);
while (exceptLast != nullptr) {
last = lastElement(exceptLast);
exceptLast = exceptLastElement(exceptLast);
path = new Path(last, path);
}
return path;
}
NearestNeighborOperator<DeviceType>::NearestNeighborOperator(
MPI_Comm comm, Kokkos::View<Coordinate const **, DeviceType> source_points,
Kokkos::View<Coordinate const **, DeviceType> target_points )
: _comm( comm )
, _indices( "indices" )
, _ranks( "ranks" )
, _size( source_points.extent_int( 0 ) )
{
// NOTE: instead of checking the pre-condition that there is at least one
// source point passed to one of the rank, we let the tree handle the
// communication and just check that the tree is not empty.
// Build distributed search tree over the source points.
DistributedSearchTree<DeviceType> search_tree( _comm, source_points );
// Tree must have at least one leaf, otherwise it makes little sense to
// perform the search for nearest neighbors.
DTK_CHECK( !search_tree.empty() );
// Query nearest neighbor for all target points.
auto nearest_queries = Details::NearestNeighborOperatorImpl<
DeviceType>::makeNearestNeighborQueries( target_points );
// Perform the actual search.
Kokkos::View<int *, DeviceType> indices( "indices" );
Kokkos::View<int *, DeviceType> offset( "offset" );
Kokkos::View<int *, DeviceType> ranks( "ranks" );
search_tree.query( nearest_queries, indices, offset, ranks );
// Check post-condition that we did find a nearest neighbor to all target
// points.
DTK_ENSURE( lastElement( offset ) == target_points.extent_int( 0 ) );
// Save results.
// NOTE: we don't bother keeping `offset` around since it is just `[0, 1, 2,
// ..., n_target_poins]`
_indices = indices;
_ranks = ranks;
}
