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Composition over inheritance (or composite reuse principle) in object-oriented programming (OOP) is the principle that classes should favor polymorphic behavior and code reuse by their composition (by containing instances of other classes that implement the desired functionality) over inheritance from a base or parent class. [2]
When implementing the adapter pattern, for clarity, one can apply the class name [ClassName] To [Interface] Adapter to the provider implementation; for example, DAOToProviderAdapter. It should have a constructor method with an adaptee class variable as a parameter.
For example, instead of using commands such as insert, delete, and update to access a specific table in a database, a class and a few stored procedures could be created in the database. The procedures would be called from a method inside the class, which would return an object containing the requested values.
In software, a data access object (DAO) is a pattern that provides an abstract interface to some type of database or other persistence mechanism. By mapping application calls to the persistence layer, the DAO provides data operations without exposing database details. This isolation supports the single responsibility principle.
C# and VB.NET like Java have "sealed" and "Not Inheritable" class declaration keywords to prohibit inheritance, and require a subclass to use keyword "override" on overriding methods, [3] the same solution later adopted by Scala. Scala require a subclass to use keyword "override" explicitly in order to override a parent class method. In the ...
The Bridge design pattern is one of the twenty-three well-known GoF design patterns that describe how to solve recurring design problems to design flexible and reusable object-oriented software, that is, objects that are easier to implement, change, test, and reuse.
//Add a Customer to the datastore //'sessionFactory' is a thread-safe object built once per application lifetime (can take seconds to build) //based on configuration files which control how database tables are mapped to C# objects //(e.g. which property maps to which column in a database table) // //'session' is not thread safe and fast to ...
ADO.NET is a set of computer software components that programmers can use to access data and data services from a database. It is a part of the base class library that is included with the Microsoft .NET Framework.