/* =========================================================================================
 * Copyright © 2013-2017 the kamon project <http://kamon.io/>
 *
 * 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
 *
 *   http://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.
 * =========================================================================================
 */

package kamon.context

import kamon.Kamon


/**
  * Utility trait that marks objects carrying a reference to a Context instance.
  *
  */
trait HasContext {
  def context: Context
}

object HasContext {
  private case class Default(context: Context) extends HasContext

  /**
    * Construct a HasSpan instance that references the provided Context.
    *
    */
  def from(context: Context): HasContext =
    Default(context)

  /**
    * Construct a HasContext instance with the current Kamon from Kamon's default context storage.
    *
    */
  def fromCurrentContext(): HasContext =
    Default(Kamon.currentContext())
}