How Can I Automate Object-to-Object Mapping in Java?

Automated Object-to-Object Mapping in Java

Question:

Developers seeking a convenient solution to convert Domain Objects (DOs) to Data Transfer Objects (DTOs) often wonder if there are free tools available to automate this process in Java.

Answer:

Indeed, numerous Java libraries offer automated object-to-object mapping capabilities:

• Commons-BeanUtils: Provides methods for converting primitive values and arrays from strings.
• Commons-Lang: Offers utilities for manipulating primitive and wrapper arrays.
• Spring Framework: Supports PropertyEditors for transforming objects from and to strings.
• Dozer: A powerful and versatile bean mapper that recursively copies data between objects.
• ModelMapper: An intelligent mapper that uses convention-based mapping and provides an API for specific use cases.
• MapStruct: A compile-time code generator that creates fast and type-safe mapping code.
• Orika: Employs byte code generation for efficient mapping with minimal overhead.
• Selma: A compile-time code generator for creating mappings.
• JMapper: Uses annotations, XML, or API to generate bean mappers (though it appears to be discontinued).
• Smooks: Provides a cartridge for binding data to Java objects (currently inactive).

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