turcsanyip commented on a change in pull request #4721:
URL: https://github.com/apache/nifi/pull/4721#discussion_r544537496



##########
File path: 
nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/ListFileTransfer.java
##########
@@ -138,4 +144,32 @@ protected boolean isListingResetNecessary(final 
PropertyDescriptor property) {
     protected abstract FileTransfer getFileTransfer(final ProcessContext 
context);
 
     protected abstract String getProtocolName();
+
+    protected void validateAdjustedTimeWindow(ValidationContext 
validationContext, Collection<ValidationResult> results) {
+        if (
+            
BY_ADJUSTED_TIME_WINDOW.getValue().equals(validationContext.getProperty(FILE_TRANSFER_LISTING_STRATEGY).getValue())
+            &&
+            !validationContext.getProperty(TIME_ADJUSTMENT).isSet()
+        ) {
+            results.add(new ValidationResult.Builder()
+                    .explanation("'" + TIME_ADJUSTMENT.getDisplayName() + "' 
has to be set when '"
+                        + FILE_TRANSFER_LISTING_STRATEGY.getDisplayName() + "' 
is set to '" + BY_ADJUSTED_TIME_WINDOW.getValue() + "'")
+                    .valid(false)
+                    .subject(TIME_ADJUSTMENT.getDisplayName())
+                    .build());
+        }
+
+        if (
+            
!BY_ADJUSTED_TIME_WINDOW.getValue().equals(validationContext.getProperty(FILE_TRANSFER_LISTING_STRATEGY).getValue())
+            &&
+            validationContext.getProperty(TIME_ADJUSTMENT).isSet()

Review comment:
       As Time Adjustment property is hidden when the Listing Strategy is other 
than Adjusted Time Window, this validation might not be necessary.




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