Method manageTopicLink

tools/monitor/MonitorDataStorage.cpp:581–671

}

void
Monitor::MonitorDataStorage::manageTopicLink(
  TreeNode*                    node,
  const OpenDDS::DCPS::GUID_t& dp_id,
  const OpenDDS::DCPS::GUID_t& topic_id,
  bool&                        create
)
{
  // This gets a bit tedious.  Here are the cases:
  // 1) We currently have no reference, and found a Topic node to
  //    reference:
  //    - attach a reference to the topic node;
  // 2) We currently have no reference, and found a Name node to
  //    reference:
  //    - attach a reference to the name node;
  // 3) We currently have a Topic node referenced, and found the same
  //    topic node to reference:
  //    - nothing to do;
  // 4) We currently have a Topic node referenced, and found a different
  //    Topic node to reference:
  //    - detach previous reference and reattach to new topic node;
  // 5) We currently have a Topic node referenced, but were able to find
  //    a name node to reference:
  //    - detach previous reference and reattach to new name node;
  // 6) We currently have a Name node referenced, and found the same name
  //    node to reference:
  //    - nothing to do;
  // 7) We currently have a Name node referenced, and found a different
  //    name node to reference:
  //    - detach previous reference and reattach to new name node;
  // 8) We currently have a Name node referenced, and found a different
  //    Topic node to reference:
  //    - detach previous reference and reattach to new topic node.
  //
  // Note that cases (4), (7), and (8) indicate inconsistent data reports
  // and are error conditions.  We chose to not handle these cases.
  // Cases (3) and (6) require no action, so the only code paths we need
  // to consider are for cases (1), (2), and (5).

  // Find the actual topic.
  TreeNode* topicNode = this->getNode(
                          std::string( "Topic"),
                          dp_id,
                          topic_id,
                          create
                        );
  if( !topicNode) {
    return;
  }

  // Find the topic name to reference instead of the GUID value.
  TreeNode* nameNode = 0;
  QString nameLabel( QObject::tr( "Topic Name"));
  int row = topicNode->indexOf( 0, nameLabel);
  if( row != -1) {
    nameNode = (*topicNode)[ row];
  }