protected Response doInvoke()

in gui/jaxrs/jaxrs-client/src/main/java/org/apache/batchee/jaxrs/client/BatchEEJAXRS2Client.java [101:150]
45 lines of code
13 McCabe index (conditional complexity)

    protected Response doInvoke(final Method jaxrsMethod, final Method method, final Object[] args) {
        final Map<String, Object> templates = new HashMap<String, Object>();
        final Map<String, Object> queryParams = new HashMap<String, Object>();

        Object body = null;
        if (args != null) {
            final Class<?>[] parameterTypes = method.getParameterTypes();
            if (parameterTypes.length == 1 && JobInstance.class.equals(parameterTypes[0])) { // getJobExecutions
                final JobInstance ji = JobInstance.class.cast(args[0]);
                templates.put("id", ji.getInstanceId());
                templates.put("name", ji.getJobName());
            } else {
                final Annotation[][] parameterAnnotations = jaxrsMethod.getParameterAnnotations();
                for (int i = 0; i < parameterAnnotations.length; i++) {
                    final Class<?> type = method.getParameterTypes()[i];

                    boolean found = false;
                    for (final Annotation a : parameterAnnotations[i]) {
                        final Class<? extends Annotation> at = a.annotationType();
                        if (PathParam.class.equals(at)) {
                            templates.put(PathParam.class.cast(a).value(), convertParam(args[i], type));
                            found = true;
                        } else if (QueryParam.class.equals(at)) {
                            queryParams.put(QueryParam.class.cast(a).value(), convertParam(args[i], type));
                            found = true;
                        }
                    }

                    if (!found) {
                        body = convertParam(args[i], type);
                    }
                }
            }
        }

        WebTarget resolvedTarget = target.path(jaxrsMethod.getAnnotation(Path.class).value());
        for (final Map.Entry<String, Object> qp : queryParams.entrySet()) {
            resolvedTarget = resolvedTarget.queryParam(qp.getKey(), qp.getValue());
        }

        final Invocation.Builder request = resolvedTarget.resolveTemplates(templates).request(findType(method.getReturnType()));
        if (jaxrsMethod.getAnnotation(GET.class) != null) {
            return request.get();
        } else if (jaxrsMethod.getAnnotation(HEAD.class) != null) {
            return request.head();
        } else if (jaxrsMethod.getAnnotation(POST.class) != null) {
            return request.post(Entity.entity(body, MediaType.APPLICATION_JSON_TYPE));
        }
        throw new IllegalArgumentException("Unexpected http method");
    }