/*!
 * 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.
 */

import { SpanContext, BinaryFormat } from '@opentelemetry/types';

/**
 * No-op implementations of {@link BinaryFormat}.
 */
class NoopBinaryFormat implements BinaryFormat {
  private readonly _buff = new ArrayBuffer(0);
  // By default does nothing
  toBytes(spanContext: SpanContext): ArrayBuffer {
    return this._buff;
  }

  // By default does nothing
  fromBytes(buf: ArrayBuffer): SpanContext | null {
    return null;
  }
}

export const NOOP_BINARY_FORMAT = new NoopBinaryFormat();
