#pragma once

#include "envoy/common/pure.h"

#include "envoy/stream_info/filter_state.h"

#include "absl/strings/string_view.h"

namespace Envoy {

namespace Router {

/**

 * Contains a string in a form which is usable with FilterState and

 * allows lazy evaluation if needed. All values meant to be accessible to the

 * custom request/response header mechanism must use this type.

 */

class StringAccessor : public StreamInfo::FilterState::Object {

public:

  /**

   * @return the string the accessor represents.

   */

  virtual absl::string_view asString() const PURE;

};

} // namespace Router

} // namespace Envoy