Sequences

13.1.9 Sequences

A sequence in OMG IDL is mapped to a C++ class. The C++ class contains the following:

Constructors
Each sequence has the following:
- A default constructor
- A constructor that initializes each element
- A copy constructor
Destructors
Modifiers for current length (and for maximum, if the sequence is unbounded)
Accessors for current length
Operator[] functions to access or modify sequence elements
Allocation and deallocation member functions

You must set the length before accessing any elements.

For example, consider the following OMG IDL definition:

// OMG IDL
module INVENT
    {
    . . .
    typedef sequence<LogItem>     LogList;
}

This definition maps to C++ as follows:

// C++
class LogList
    {
    public:
        // Default constructor
        LogList();

       // Maximum constructor
       LogList(CORBA::ULong _max);
      // TYPE * data constructor
      LogList
      (
         CORBA::ULong _max,
         CORBA::ULong _length,
         LogItem *_value,
         CORBA::Boolean _relse = CORBA_FALSE
      );
      // Copy constructor
      LogList(const LogList&);
     // Destructor
     ~LogList();
      LogList &operator=(const LogList&);
      CORBA::ULong maximum() const;
      void length(CORBA::ULong);
      CORBA::ULong length() const;
      LogItem &operator[](CORBA::ULong _index);
      const LogItem &operator[](CORBA::ULong _index) const;
      static LogItem *allocbuf(CORBA::ULong _nelems);
      static void freebuf(LogItem *);
      };
};

Parent topic: Mappings