## On this page

  

 

 # File i\_topic.h

 Last update: 22.04.2026 

![](https://img.shields.io/badge/language-C%2B%2B-blue "C++")

**Location**: `core/communication/i_topic.h`

## Classes

- [simulation\_framework::core::ITopic](classsimulation__framework_1_1core_1_1ITopic.md#classsimulation__framework_1_1core_1_1ITopic)

## Namespaces

- [simulation\_framework](namespacesimulation__framework.md#namespacesimulation__framework)
- [simulation\_framework::core](namespacesimulation__framework_1_1core.md#namespacesimulation__framework_1_1core)

## Includes

- [core/communication/i\_publisher.h](i__publisher_8h.md#i__publisher_8h)
- [core/communication/i\_subscriber.h](i__subscriber_8h.md#i__subscriber_8h)
- core/export/simfwk\_core\_export.h

## Included by

- [base\_activity.h](base__activity_8h.md#base__activity_8h)
- [topic.h](topic_8h.md#topic_8h)

## Source

```cpp


#ifndef SIMFWK_CORE_COMMUNICATION_ITOPIC_H
#define SIMFWK_CORE_COMMUNICATION_ITOPIC_H

#include "core/communication/i_publisher.h"
#include "core/communication/i_subscriber.h"
#include "core/export/simfwk_core_export.h"

namespace simulation_framework
{
namespace core
{

enum class TopicType
{
    kRTIDDS = 0,
    kGRPC
};
using TopicId = std::string;

class SIMFWK_CORE_API ITopic
{
  public:
    virtual ~ITopic() = default;

    virtual TopicId GetId() const = 0;

    virtual TopicType GetType() const = 0;

    virtual std::size_t SubscriberCount() const = 0;

    virtual std::size_t PublisherCount() const = 0;

    virtual void AddPublisher(std::unique_ptr<IPublisher> pub_ptr) = 0;

    virtual void AddSubscriber(std::unique_ptr<ISubscriber> sub_ptr) = 0;

    virtual void ClearPubSub() = 0;

    virtual const Subscribers& GetSubscribers() const = 0;

    virtual const Publishers& GetPublishers() const = 0;
};

using TopicIdVector = std::vector<TopicId>;
using Topics = std::vector<std::shared_ptr<ITopic>>;

}  // namespace core
}  // namespace simulation_framework

#endif  // SIMFWK_CORE_COMMUNICATION_ITOPIC_H

```