What is S3lm4 ?

S3lm4 stands for Stupid Simple Staticaly Linked Mapper. In fact it is on one side an Annotation Processor that generate Java code to handle the mapping from field to field at compile time. On the other side, it is a Runtime library to instantiate and invoke the generated Mapper.

How does it works ?

First add selma-processor as a provided dependency and selma as a compile dependency to your build. Then, define a Mapper interface describing the mapping you want:

@Mapper
public interface SelmaMapper {

    OutBean asOutBean(InBean in);

}

Then ? Well just use the generated Mapper:

    SelmaMapper mapper = Selma.mapper(SelmaMapper.class).build();

    OutBean res = mapper.asOutBean(in);

And voilà !

Features

• Generate code for mapping bean to bean matching fields to fields ** Support for nested bean ** Bean should respect Java property convention
• Maps Enum using identical values
• Maps Collection any to any
• Maps Map any to any
• Use strict memory duplication for all fields
• Support for Factory to instantiate beans is out of the box
• Support Type to Type custom mapping using custom mapping static methods
• Gives full feedback at compilation time
• Break build when mapping does not work Say good bye to mapping errors in production

Usage

First add selma and selma-processor to your pom dependencies:

        <!-- scope provided because the processor is only needed for the compiler -->
        <dependency>
            <groupId>fr.xebia.extras</groupId>
            <artifactId>selma-processor</artifactId>
            <version>0.1-SNAPSHOT</version>
            <scope>provided</scope>
        </dependency>

        <!-- This is the only real dependency you will have in youre binaries -->
        <dependency>
            <groupId>fr.xebia.extras</groupId>
            <artifactId>selma</artifactId>
            <version>0.1-SNAPSHOT</version>
        </dependency>

Then, as I said earlier, build youre interface with @Mapper annotation and enjoy.

Checkout the example module to have a deeper look.

Help needed, please report issues and ask for features :)