Function Group

internal/hierarchy/hierarchy.go:95–108

Group splits a slice of endpoints into groups based on the first hierarchy path. The first hierarchy path will be removed from the result. Input: [ {endpoint0, path: [p0, wt0]} {endpoint1, path: [p0, wt1]} {endpoint2, path: [p1, wt2]} {endpoint3, path: [p1, wt3]} ] Endpoints will be split in

(endpoints []resolver.Endpoint)

// If hierarchical path is not set, or has no path in it, the endpoint is
// dropped.
func Group(endpoints []resolver.Endpoint) map[string][]resolver.Endpoint {
	ret := make(map[string][]resolver.Endpoint)
	for _, endpoint := range endpoints {
		oldPath := FromEndpoint(endpoint)
		if len(oldPath) == 0 {
			continue
		}
		curPath := oldPath[0]
		newPath := oldPath[1:]
		newEndpoint := SetInEndpoint(endpoint, newPath)
		ret[curPath] = append(ret[curPath], newEndpoint)
	}
	return ret
}