Add TraceOptions and TraceState empty class

packages/opentelemetry-types/src/trace/span_context.ts

@@ -14,6 +14,9 @@
  * limitations under the License.
  */
 
+import { TraceState } from './tracestate';
+import { TraceOptions } from './traceoptions';
+
 /**
  * A SpanContext represents the portion of a Span which must be serialized and
  * propagated along side of a distributed context.
@@ -39,7 +42,7 @@ export interface SpanContext {
    * sampled or not.
    * SAMPLED_VALUE = 0x1 and NOT_SAMPLED_VALUE = 0x0;
    */
-  traceOptions?: number;
+  traceOptions?: TraceOptions;
   /**
    * Tracing-system-specific info to propagate.
    *
@@ -56,5 +59,5 @@ export interface SpanContext {
    *     Multiple tracing systems (with different formatting):
    *         tracestate: rojo=00f067aa0ba902b7,congo=t61rcWkgMzE
    */
-  traceState?: string;
+  traceState?: TraceState;
 }

packages/opentelemetry-types/src/trace/traceoptions.ts

@@ -0,0 +1,19 @@
+/**
+ * Copyright 2019, OpenTelemetry Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+export class TraceOptions {
+  // TODO
+}

packages/opentelemetry-types/src/trace/tracestate.ts

@@ -0,0 +1,19 @@
+/**
+ * Copyright 2019, OpenTelemetry Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+export class TraceState {
+  // TODO
+}