Implementation of association as an object, Database Management System

Assignment Help:

Implementation of association as an object

Implement as a separate association object, independent of either class, as in Figure. An association object is a group of pairs of associated objects stored in the single variable-size object. For efficiency, we can implement an association object using two dictionary objects, one for forward direction and other for backward direction. This concept is useful for extending predefined classes from a library that cannot be modified. Distinct association objects are also helpful for sparse associations. In sparse associations mainly objects of the classes do not participate as space is used only for actual links.

101_Implementation of association as an object.png

Figure: Implementation of association as an object

Related Discussions:- Implementation of association as an object

Illustrate the deployment diagram, Illustrate the Deployment Diagram A...

Illustrate the Deployment Diagram A deployment diagram shows all nodes on network, their processor execution and interconnections. In a dynamic model, this is used to represen

Illustrate the view of software architecture, Illustrate the view of softwa...

Illustrate the view of software architecture A model is a semantically closed abstraction of system composes of elements. It can be visualized using any of the following five v

Which operator is used to compare a value to a list literals, Which operato...

Which operator is used to compare a value to a list of literals values that have been specified? BETWEEN operator is used to compare a value to a list of literals values that h

Define signal, Define Signal. It allows methods to respond to events tr...

Define Signal. It allows methods to respond to events triggered by themselves or by other processes. Each signal corresponds to an exacting event. A signal is represented in Sy

Large Project, Can you help me with the following: Drop statements for all...

Can you help me with the following: Drop statements for all objects in the lab project. Create statements for all objects of the lab project Create indexes for foreign keys Cre

Explain candidate key, Explain Candidate key? Candidate Key - A candi...

Explain Candidate key? Candidate Key - A candidate key is a minimal superkey, that can be used to uniquely identify a tuple in the relation.

Give example of relational schema, An instance of relational schema R (A, B...

An instance of relational schema R (A, B, C) has distinct values of A including NULL values. then A is a candidate key or not? If relational schema R (A, B, C) has distinct val

State the step- implement software control designer, Implementing software ...

Implementing software control To implement software control designer must redesign strategy of state event model which is present in dynamic model. There are three basic ap

What are the causes of bucket overflow in a hash file, What are the causes ...

What are the causes of bucket overflow in a hash file organization? What can be done to reduce the occurrence of bucket overflow? When a record is inserted, the bucket to that

Write short note on events, Write short note on Events Events consist ...

Write short note on Events Events consist of inputs, interrupts, decisions and actions performed by any external device or users. Every event always has a sender and receiver.

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages