MapMaid serializes, deserializes and validates Java objects in a clean and non-invasive way. It deeply understands and respects the concepts of Domain-Driven Design.


Almost any modern application nowadays is dealing with mapping incoming requests to domain objects and outputting resulting domain objects to a specific format (typically JSON, XML or YAML).

As a result, we keep writing the same code over and over again:

  • Parse strings into domain objects
  • Validate the objects on initialization
  • Process the requests
  • Serialize the response objects

While there are numerous frameworks that help you on some of the stages of this process, we believe there is a need for a simple, non-invasive library that would allow you to integrate this process into your application seamlessly and concentrate on your business logic.

Highlighted features

  • Designed for Domain-Driven Design:

    • MapMaid automatically understands factory methods
    • MapMaid understands the concept of Custom Primitives or Value Types
    • MapMaid understands the concept of Serialized Objects
  • No Magic - MapMaid is using your objects the same way as a programmer:

    • MapMaid will not read nor write private fields
    • MapMaid will not write values into final fields
    • MapMaid will not invoke private methods
    • MapMaid will not generate dynamic proxies
    • MapMaid will not generate bytecode
    • MapMaid does not favour the use of annotations
  • Domain-Driven Validation:

    • MapMaid allows you to check for validation exceptions and aggregates them accordingly
    • You will know precisely which field of which object was faulty
    • MapMaid also offers ways to detect redundant validation exceptions
  • Non-intrusive usage and configuration:

    • Configuration in one place
    • No annotations
    • Simple adaptation to your specific style of defining objects
    • No dependencies to serialization and validation frameworks in your domain code
  • Flexible:

    • Support for all common data formats (JSON, XML and YAML)
    • Serialize and deserialize any object of any class - no matter how weird their structure