Use pattern matching

Signed-off-by: Tran Ngoc Nhan <[email protected]>

Author: ngocnhan-tran1996

oauth2/oauth2-resource-server/src/main/java/org/springframework/security/oauth2/server/resource/web/BearerTokenAuthenticationEntryPoint.java

@@ -65,8 +65,8 @@ public void commence(HttpServletRequest request, HttpServletResponse response,
 		if (this.realmName != null) {
 			parameters.put("realm", this.realmName);
 		}
-		if (authException instanceof OAuth2AuthenticationException) {
-			OAuth2Error error = ((OAuth2AuthenticationException) authException).getError();
+		if (authException instanceof OAuth2AuthenticationException oAuth2AuthenticationException) {
+			OAuth2Error error = oAuth2AuthenticationException.getError();
 			parameters.put("error", error.getErrorCode());
 			if (StringUtils.hasText(error.getDescription())) {
 				parameters.put("error_description", error.getDescription());
@@ -78,7 +78,7 @@ public void commence(HttpServletRequest request, HttpServletResponse response,
 				if (StringUtils.hasText(bearerTokenError.getScope())) {
 					parameters.put("scope", bearerTokenError.getScope());
 				}
-				status = ((BearerTokenError) error).getHttpStatus();
+				status = bearerTokenError.getHttpStatus();
 			}
 		}
 		String wwwAuthenticate = computeWWWAuthenticateHeaderValue(parameters);