bobpaulin commented on code in PR #9635:
URL: https://github.com/apache/nifi/pull/9635#discussion_r1917248042


##########
nifi-extension-bundles/nifi-gcp-bundle/nifi-gcp-processors/src/main/java/org/apache/nifi/processors/gcp/credentials/factory/strategies/AbstractServiceAccountCredentialsStrategy.java:
##########
@@ -37,7 +39,13 @@ public AbstractServiceAccountCredentialsStrategy(String 
name, PropertyDescriptor
 
     @Override
     public GoogleCredentials getGoogleCredentials(Map<PropertyDescriptor, 
String> properties, HttpTransportFactory transportFactory) throws IOException {
+        final String delegationStrategy = 
properties.get(CredentialPropertyDescriptors.DELEGATION_STRATEGY);
+        if (delegationStrategy != null && 
delegationStrategy.equals(DelegationStrategy.DELEGATED_ACCOUNT.getValue())) {
+            final String delegationUser = 
properties.get(CredentialPropertyDescriptors.DELEGATION_USER);
+            return 
GoogleCredentials.fromStream(getServiceAccountJson(properties), 
transportFactory).createDelegated(delegationUser);
+        } else {
             return 
GoogleCredentials.fromStream(getServiceAccountJson(properties), 
transportFactory);
+        }

Review Comment:
   So that would be possible but the switch statement would be based on the 
string value since properties map doesn't return the enum directly.  So I'd 
still have a default case to handle that would essentially be the null check.  
   
   ```
   switch (delegationStrategy) {
      case DelegationStrategy.DELEGATED_ACCOUNT.getValue():
      ....
      case DelegationStrategy.SERVICE_ACCOUNT.getValue()
      ...
      default:
         throw IllegalArgumentException("Delegation Strategy not defined");
   }
   ```



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