Strategy.md

Strategy

Type: Behavioral Pattern

Structure:

In my Codes(Role - Classes):

• Context: Context
• Strategy: Strategy
• ConcreteStrategy: AddStrategy, MinusStrategy...

Key Point

• Policy: Packaging a family of algorithms
• Strategy: It declares an interface common to all supported algorithms. Context uses this interface to call the algorithm defined by a concrete strategy
• Concrete Strategy: It implements the algorithm using the Strategy interface
• Context:
  • It contains a reference to concrete strategy object
  • It can define an interface that allow the strategy to get its data
• Hierarchies of Strategy classes define a family of algorithms or behaviors for contexts to reuse
• But we should know what the strategy really does