@Path("/swagger")
public class SwaggerResource {

    @GET
    @Path("/json")
    @Produces({MediaType.APPLICATION_JSON})
    public Response readJson() throws IOException {
        try (InputStream resource
                = getClass().getResourceAsStream("/swagger.json");
             final JsonReader reader = Json.createReader(resource)) {
            final JsonObject object = reader.readObject();
            final JsonObjectBuilder builder = Json.createObjectBuilder();
            object.entrySet().stream()
                    .filter(e -> !e.getKey().equals("host")
                                 && !e.getKey().equals("basePath")
                                 && !e.getKey().equals("schemes"))
                    .forEach(e -> builder.add(e.getKey(), e.getValue()));
            builder.add("host", uriInfo.getBaseUri().getAuthority());
            builder.add("basePath", servletContext.getContextPath()
                                    + Application_.APPLICATION_PATH);
            builder.add("schemes", Json.createArrayBuilder()
                        .add(uriInfo.getBaseUri().getScheme()));
            return Response.ok((StreamingOutput) output -> {
                try (JsonWriter writer = Json.createWriter(output)) {
                    writer.writeObject(builder.build());
                }
            }).build();
        }
    }

    @GET
    @Path("/ui")
    public Response readUi() throws IOException {
        final URI json
                = uriInfo.getBaseUriBuilder()
                .path("swagger")
                .path("json")
                .build();
        final URI swaggerUi
                = UriBuilder.fromUri(servletContext.getContextPath())
                .path("swagger-ui")
                .path("index.html")
                .queryParam("url", json).build();
        return Response.seeOther(swaggerUi).build();
    }

    @Context
    private UriInfo uriInfo;

    @Context
    private ServletContext servletContext;
}

{
  "schemes": [${swagger.config.schemes}],
  "host": "${swagger.config.host}",
  "basePath": "${swagger.config.basePath}",
  "description": "description",
  "resourcePackage": "your.pkg.to.jax.rs.resources",
  "scan": true,
  "version": "${api.version}",
  "info": {
    "title": "title"
  }
}

final ObjectMapper mapper = new ObjectMapper();
try {
    final BeanConfig config = mapper.readValue(
        getClass().getResource("/swagger/config.json"),
        BeanConfig.class);
} catch (final IOException ioe) {
    ioe.printStackTrace(System.err);
}