| 1 | import * as Constants from './constants';
|
| 2 | import Reference from './reference';
|
| 3 | import Span from './span';
|
| 4 | import SpanContext from './span_context';
|
| 5 |
|
| 6 | /**
|
| 7 | * Return a new REFERENCE_CHILD_OF reference.
|
| 8 | *
|
| 9 | * @param {SpanContext} spanContext - the parent SpanContext instance to
|
| 10 | * reference.
|
| 11 | * @return a REFERENCE_CHILD_OF reference pointing to `spanContext`
|
| 12 | */
|
| 13 | export function childOf(spanContext: SpanContext | Span): Reference {
|
| 14 | // Allow the user to pass a Span instead of a SpanContext
|
| 15 | if (spanContext instanceof Span) {
|
| 16 | spanContext = spanContext.context();
|
| 17 | }
|
| 18 | return new Reference(Constants.REFERENCE_CHILD_OF, spanContext);
|
| 19 | }
|
| 20 |
|
| 21 | /**
|
| 22 | * Return a new REFERENCE_FOLLOWS_FROM reference.
|
| 23 | *
|
| 24 | * @param {SpanContext} spanContext - the parent SpanContext instance to
|
| 25 | * reference.
|
| 26 | * @return a REFERENCE_FOLLOWS_FROM reference pointing to `spanContext`
|
| 27 | */
|
| 28 | export function followsFrom(spanContext: SpanContext | Span): Reference {
|
| 29 | // Allow the user to pass a Span instead of a SpanContext
|
| 30 | if (spanContext instanceof Span) {
|
| 31 | spanContext = spanContext.context();
|
| 32 | }
|
| 33 | return new Reference(Constants.REFERENCE_FOLLOWS_FROM, spanContext);
|
| 34 | }
|