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JAX-RS Generation from RAML (raml-to-jaxrs)

All distributions works in the following ways:

  • Interfaces are generated and will be regenerated when the RAML definition changes;
  • One interface is generated per top level resource, sub-resources are built from the subresources defined in the RAML parser;
  • A response object wrapper is created for each resource action in order to guide the implementer in producing only results that are compatible with the RAML definition;
  • Custom annotations are generated for HTTP methods that are not part of the core JAX-RS specification;
  • Objects defined as RAML 1.0 objects are generated. These objects are not as flexible as we want right now, but we are hoping to make them more flexible are we figure this out;
  • Objects are also generated based on JSON schemas to represent request/response entities;
  • English is the language used in the interface and method names generation.

Currently Supported

  • JAX-RS 2.0
  • JSR-303 annotations, except @Pattern because RAML uses ECMA 262/Perl 5 patterns and javax.validation uses Java ones; and with @Min/@Max support limited to non decimal minimum/maximum constraints defined in RAML;
  • Model object generation based on JSON schemas, with Jackson 1, 2 or Gson annotations;
  • Generation of JAXB-annotated classes based on XML Schemas;
  • Annotations can be generated using one or a combination of three formats: Gson, Jackson and JAXB
  • Generation plugins: the generation of the interfaces and the response classes can be controlled using a set of RAML annotations in the source RAML file.

Using the Maven plugin

There are several examples of projects using the maven plugin. The configuration of these projects is documented here.

Using the CLI

The project raml-to-jaxrs-cli contains the CLI artifact. It is setup to build a JAR with dependencies which can then be used in the command line.

usage: ramltojaxrs -d <arg> [-g <arg>] [-m <arg>] [-r <arg>] [-s <arg>]
 -d,--directory <arg>             generation directory
 -g,--generate-types-with <arg>   generate types with plugins (jackson,
                                  gson, jaxb, javadoc, jsr303)
 -m,--model-package <arg>         model package
 -r,--resource-package <arg>      resource package
 -s,--support-package <arg>       support package

E.g.

$ cd raml-to-jaxrs/raml-to-jaxrs-cli/
$ mvn clean install
$ java -jar ./target/raml-to-jaxrs-cli-<version>-jar-with-dependencies.jar -d /tmp -r foo.bar ../examples/maven-examples/raml-defined-example/src/main/resources/types_user_defined.raml

This will generate the source of a foo.bar package inside the folder /tmp using the RAML file included in the raml-defined-example example.