DCPS_IR_Topic_Description.h

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/*
 *
 *
 * Distributed under the OpenDDS License.
 * See: http://www.opendds.org/license.html
 */

#ifndef DCPS_IR_TOPIC_DESCRIPTION_H
#define DCPS_IR_TOPIC_DESCRIPTION_H

#include  "inforepo_export.h"
#include /**/ "ace/Unbounded_Set.h"
#include /**/ "ace/SString.h"
#include /**/ "tao/corbafwd.h"

#include <string>

#if !defined (ACE_LACKS_PRAGMA_ONCE)
#pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */

// forward declarations
class DCPS_IR_Publication;
class DCPS_IR_Domain;

class DCPS_IR_Subscription;
typedef ACE_Unbounded_Set<DCPS_IR_Subscription*> DCPS_IR_Subscription_Set;

class DCPS_IR_Topic;
typedef ACE_Unbounded_Set<DCPS_IR_Topic*> DCPS_IR_Topic_Set;

/**
 * @class DCPS_IR_Topic_Description
 *
 * @brief Representative of a Topic Description
 *
 */
class OpenDDS_InfoRepoLib_Export DCPS_IR_Topic_Description {
public:
  DCPS_IR_Topic_Description(
    DCPS_IR_Domain* domain,
    const char* name,
    const char* dataTypeName);

  ~DCPS_IR_Topic_Description();

  /// Adds the subscription to the list of subscriptions
  /// Tries to associate with existing publications if successfully added
  /// 'associate' switch toggles association attempt.
  /// Returns 0 if added, 1 if already exists, -1 other failure
  int add_subscription_reference(DCPS_IR_Subscription* subscription
                                 , bool associate = true);

  /// Removes the subscription from the list of subscriptions
  /// Returns 0 if successful
  int remove_subscription_reference(DCPS_IR_Subscription* subscription);

  /// Add a topic
  /// Takes ownership of memory pointed to by topic
  /// Returns 0 if added, 1 if already exists, -1 other failure
  int add_topic(DCPS_IR_Topic* topic);

  /// Removes the topic from the list of topics
  /// Gives ownership of the memory pointed to by topic
  ///  to the caller
  /// Returns 0 if successful
  int remove_topic(DCPS_IR_Topic* topic);

  /// Gets the first topic in the topic list
  DCPS_IR_Topic* get_first_topic();

  /// Tries to associate the publication will each of
  ///  the subscriptions in the subscription list
  void try_associate_publication(DCPS_IR_Publication* publication);

  /// Tries to associate the subscription will each of
  ///  the publications in each topic in the topic list
  void try_associate_subscription(DCPS_IR_Subscription* subscription);

  /// Checks to see if the publication and subscription can
  ///  be associated.
  bool try_associate(DCPS_IR_Publication* publication,
                     DCPS_IR_Subscription* subscription);

  /// Associate the publication and subscription
  void associate(DCPS_IR_Publication* publication,
                 DCPS_IR_Subscription* subscription);

  /// Re-evaluate the association between the provided publication and
  /// the subscriptions it maintains.
  void reevaluate_associations(DCPS_IR_Publication* publication);

  /// Re-evaluate the association between the provided subscription and
  /// the publications in all its maintained topics.
  void reevaluate_associations(DCPS_IR_Subscription* subscription);

  const char* get_name() const ;
  const char* get_dataTypeName() const;

  /// Returns the number of topics
  CORBA::ULong get_number_topics() const;

  std::string dump_to_string(const std::string& prefix, int depth) const;

private:
  ACE_CString name_;
  ACE_CString dataTypeName_;
  DCPS_IR_Domain* domain_;

  DCPS_IR_Subscription_Set subscriptionRefs_;
  DCPS_IR_Topic_Set topics_;
};

#endif /* DCPS_IR_TOPIC_DESCRIPTION_H */

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