Persistent Programming Languages ANDC++ Language Binding

Palak Raina(C-44)Supriya Nakkalwar(C-33)

PERSISTENT PROGRAMMING LANGUAGES

Persistence of Objects

Object Identity and Pointers

CONTD..

Persistent C++ Systems

Persistent C++ ODL: Exampleclass Branch : public d_Object {….}class Person : public d_Object {public:d_String name; // should not use String!d_String address;};class Account : public d_Object {private:d_Long balance;public:d_Long number;d_Set <d_Ref<Customer>> owners;int find_balance();int update_balance(int delta);};

Persistent Java Systems

Contd…

C++ Language Binding

•d_ref<professor> profp•d_ref<department> deptref•profp_->grant_tenure()•Deptref=Profp->dept

A template class is specified for each type of collection:

D_Set<T> D_List<T> D_Bag<T> D_Varray<T> D_Dictionary<T>

Example 1: D_Set<D_Ref<STUDENT>>

Example 2: D_Set<string>

Data Types of Attributes