Modify Request and Response through Interceptors at restTemplate in Java Spring

RequestResponseModifyInterceptor.java

    @Override
    public ClientHttpResponse intercept(HttpRequest request, byte[] body, ClientHttpRequestExecution execution) throws IOException {
        String reqBody = new String(body);
        byte[] modifiedRequestBody = service.modifyExitingObject(reqBody); // modify as per requirement
        ClientHttpResponse response = execution.execute(request, modifiedRequestBody);
        String responseBody = new String(response.getBody().readAllBytes());
        byte[] modifiedResponseBodyBytes = service.doResponseModification(responseBody); // apply required modification on received response
        String modifiedResponseBody = new String(modifiedResponseBodyBytes);

        // prepare modified response to be returned
        ClientHttpResponse modifiedResponse = new ClientHttpResponse() {
            @Override
            public HttpHeaders getHeaders() {
                return response.getHeaders();
            }

            @Override
            public InputStream getBody() throws IOException {
                // The expected modified response body to be populated here
                return new ByteArrayInputStream(modifiedResponseBody.getBytes());
            }

            @Override
            public HttpStatus getStatusCode() throws IOException {
                return response.getStatusCode();
            }

            @Override
            public int getRawStatusCode() throws IOException {
                return response.getRawStatusCode();
            }

            @Override
            public String getStatusText() throws IOException {
                return response.getStatusText();
            }

            @Override
            public void close() {

            }
        };
        return modifiedResponse;
    }

SpringBootApplication.java

	@Bean
	public RestTemplate getInterceptedRestTemplate() {
		RestTemplate restTemplate =
				new RestTemplate(new BufferingClientHttpRequestFactory(new SimpleClientHttpRequestFactory()));
		List<ClientHttpRequestInterceptor> interceptors = new ArrayList<>();
		interceptors.add(interceptor); // use above defined interceptor here
		restTemplate.setInterceptors(interceptors);
		return restTemplate;
	}