public OAuthUserInfo getUserInfo()

in src/main/java/com/googlesource/gerrit/plugins/oauth/DexOAuthService.java [89:131]
36 lines of code
8 McCabe index (conditional complexity)

  public OAuthUserInfo getUserInfo(OAuthToken token) throws IOException {
    JsonElement tokenJson = JSON.newGson().fromJson(token.getRaw(), JsonElement.class);
    JsonObject tokenObject = tokenJson.getAsJsonObject();
    JsonElement id_token = tokenObject.get("id_token");

    String jwt;
    try {
      jwt = parseJwt(id_token.getAsString());
    } catch (UnsupportedEncodingException e) {
      throw new IOException(
          String.format(
              "%s support is required to interact with JWTs", StandardCharsets.UTF_8.name()),
          e);
    }

    JsonElement claimJson = JSON.newGson().fromJson(jwt, JsonElement.class);

    // Dex does not support basic profile currently (2017-09), extracting info
    // from access token claim

    JsonObject claimObject = claimJson.getAsJsonObject();
    JsonElement emailElement = claimObject.get("email");
    JsonElement nameElement = claimObject.get("name");
    if (emailElement == null || emailElement.isJsonNull()) {
      throw new IOException("Response doesn't contain email field");
    }
    if (nameElement == null || nameElement.isJsonNull()) {
      throw new IOException("Response doesn't contain name field");
    }
    String email = emailElement.getAsString();
    String name = nameElement.getAsString();
    String username = email;
    if (domain != null && domain.length() > 0) {
      username = email.replace("@" + domain, "");
    }

    return new OAuthUserInfo(
        DEX_PROVIDER_PREFIX + email /*externalId*/,
        username /*username*/,
        email /*email*/,
        name /*displayName*/,
        null /*claimedIdentity*/);
  }