Metalama 1.0 / / Metalama Documentation / Conceptual Documentation / Validating Code

Validating Code

This chapter describes how to validate your source code against the architecture, design patterns, and other team conventions.


Validating code is especially important in projects that are developed by a large team or maintained over a long period.

  • Executable rules instead of paper guidelines. Instead of just being written down (simply for reference), architecture guidelines can now be enforced in real time within the code editor.
  • Immediate feedback. No need to wait for the CI build to complete. Developers get feedback within seconds.
  • Smoother code reviews. Petty violations of rules are automatically detected, so code reviews can focus on flows and concepts.
  • Better team alignment. Automated code validation encourages the team to respect a consistent set of patterns and practices.
  • Lower complexity. When the whole team follows consistent patterns and practices, the resulting code base is simpler for everybody.
  • Lower architecture erosion. As a result, the gap between the initial architecture and its implementation in source code stays smaller.

Aspects or Fabrics

You can validate code using both aspects or fabrics. The approach is very similar.

  • Use aspects if you want to encapsulate your validation logic as a custom attribute that you can then use many times in the current project or in other projects.
  • Use fabrics if you don't need your logic to be reusable, or if you prefer to expose an object-oriented API instead of custom attributes.

In this chapter

This chapter contains the following articles:

Article Description
Validating Declarations This article explains how an aspect or a fabric can validate a declaration. It also shows how to validate the state of the code model after all aspects have been applied.
Validating References This article describes how to validate the way a declaration is being used, i.e. to validate every reference instead of the declaration itself.