Analyze the following hypothetical Java-like code snippet which represents a monolithic 'OrderProcessor' class that handles validation, database connection, payment processing, and email notifications all in one method. Identify the violations of the SOLID principles (Single Responsibility, Open/Closed, Liskov Substitution, Interface Segregation, Dependency Inversion). Rewrite the code to refactor it into a modular, maintainable structure. Your solution should include: 1) Separation of concerns into distinct classes/interfaces. 2) Dependency injection for decoupling services. 3) Implementation of a strategy pattern for different payment methods. 4) Brief comments explaining how each SOLID principle is now satisfied in the new structure.