Specification Pattern

Encapsulate business rules as specification objects that can be combined, reused, and tested independently. Use specifications for validation, filtering, and query building.

Usage

Ask about implementing specifications for your business rules, composing complex criteria, or integrating specifications with your repository layer.

Examples

• "How do I implement the specification pattern for order filtering?"
• "Can I combine specifications with AND and OR logic?"
• "How do specifications work with database queries?"

Guidelines

• Each specification should represent a single business rule
• Use composite specifications (AND, OR, NOT) to build complex criteria
• Specifications should be pure — no side effects
• Consider translating specifications to SQL for database-level filtering
• Name specifications after the business rule they represent, not technical details