Spring + RestTemplate

GitHubService.java

@Service
@GraphQLApi
public class GitHubService {

    @Autowired
    RestTemplate restTemplate;


    @Bean
    RestTemplate restTemplate() {
        return new RestTemplate();
    }
    
    

    @JsonIgnoreProperties(ignoreUnknown = true)
    @Getter
    @Setter
    static class GitHubRepoistory {
        @JsonProperty("id")
        int id;

        @JsonProperty("full_name")
        String fullName;
    }


    @GraphQLQuery(name = "repos")
    public Map<String, Object> getRepository(@NotEmpty String username) throws URISyntaxException {


        String url = String.format("https://api.github.com/users/%s/repos", username);
        GitHubRepoistory[] repoistoriest = restTemplate.getForObject(new URI(url), GitHubRepoistory[].class);
        List<Map<String, Object>> list = Arrays.stream(repoistoriest).map( i -> new HashMap<String, Object>(){{
            put("id", i.id);
            put("fullName", i.fullName);
        }}).collect(Collectors.toList());

        return new HashMap<String, Object>() {{
            put("repos", list);
            put("count", list.size());
        }};

/*   AS Same
       ResponseEntity<List<GitHubRepoistory>> response = restTemplate.exchange(url, HttpMethod.GET, null, new ParameterizedTypeReference<List<GitHubRepoistory>>() {});

        return response.getBody().stream().map( i -> new HashMap<String, Object>(){
            {
                put("id", i.id);
                put("fullName", i.fullName);
            }}).collect(Collectors.toList());
*/


    }
}