Creational Design Patterns in Modern C++ - Parameterized Factory Method

The video tutorial explains the factory design pattern, highlighting its limitations when adding new product types. It introduces a parameterized factory approach to create instances of multiple document types without needing corresponding application classes. The tutorial demonstrates implementing this approach in a project, detailing the creation of a document factory method that uses conditional statements to return different document instances. It also discusses making the factory method static to avoid unnecessary instance creation, emphasizing the simplicity and flexibility of this implementation.

What is a key disadvantage of the traditional factory method pattern?

• It cannot create instances of classes.

• It requires a new product clause for each new product type.

• It is too complex to implement.

• It does not support any document types.

Why is a parameterized factory needed in the framework?

• To make the application run faster.

• To support multiple document types in the same application.

• To eliminate the need for any factory methods.

• To reduce the number of classes in the application.

What is the purpose of the document factory class?

• To manage user inputs for document creation.

• To replace the application class entirely.

• To store all document types in a single class.

• To create instances of different document classes based on a parameter.

How does the document factory avoid circular dependencies?

• By not including the application header file in the factory class.

• By using only integer parameters.

• By creating a separate class for each document type.

• By using a global variable for document types.

What is the benefit of making the create method static in the document factory?

• It simplifies usage by not requiring instance creation.

• It allows for dynamic document type creation.

• It increases the speed of document creation.

• It reduces the number of lines of code.

What must be done to add support for new document types in the future?

• Rewrite the entire document factory class.

• Add a new header file for each document type.

• Modify the create method to include new conditional statements.

• Create a new application class for each document type.

What is a parameterized factory method?

• A method that is used only for text documents.

• A method that returns object types based on a parameter value.

• A method that creates only one type of document.

• A method that does not require any parameters.