Swagger Plugin Enum values to lower case

context.xml

<!-- 
and specified it as swaggerApiReader on the apiSource config in the pom:
now if the enum implements toString, it will be serialized using its toString method 
-->
<apiSource>
...
<swaggerApiReader>com.your.package.SwaggerCustomJaxrsReader</swaggerApiReader>
...
</apiSource>

SwaggerReader.java

/**
 * Hi,
 * we had the same problem and we worked around it by creating a custom swaggerApiReader :
 **/

import com.github.kongchen.swagger.docgen.reader.JaxrsReader;

public class SwaggerCustomReader extends JaxrsReader {
    public SwaggerCustomReader(Swagger swagger, Log log) {
        super(swagger, log);
        Json.mapper().configure(SerializationFeature.WRITE_ENUMS_USING_TO_STRING, true);
    }
}