mike-jumper commented on a change in pull request #546:
URL: https://github.com/apache/guacamole-client/pull/546#discussion_r513950716



##########
File path: 
guacamole/src/main/java/org/apache/guacamole/rest/connection/ConnectionResource.java
##########
@@ -150,18 +153,26 @@ public ConnectionResource(@Assisted UserContext 
userContext,
      * @throws GuacamoleException
      *     If an error occurs while retrieving the connection history.
      */
-    @GET
+    @SuppressWarnings("deprecation")
     @Path("history")
-    public List<APIConnectionRecord> getConnectionHistory()
+    public ConnectionHistoryResource getConnectionHistory()
             throws GuacamoleException {
 
-        // Retrieve the requested connection's history
-        List<APIConnectionRecord> apiRecords = new 
ArrayList<APIConnectionRecord>();
-        for (ConnectionRecord record : connection.getHistory())
-            apiRecords.add(new APIConnectionRecord(record));
-
-        // Return the converted history
-        return apiRecords;
+        try {
+            return new 
ConnectionHistoryResource(connection.getConnectionHistory());
+        }
+        catch (GuacamoleUnsupportedException e) {
+            try {
+                List<ConnectionRecord> history = Collections.emptyList();
+                for (ConnectionRecord record : connection.getHistory()) {
+                    history.add(record);
+                }
+                return new ConnectionHistoryResource(new 
SimpleActivityRecordSet<>(history));
+            }
+            catch (GuacamoleUnsupportedException ex) {
+                return new ConnectionHistoryResource(new 
SimpleActivityRecordSet<>());
+            }
+        }

Review comment:
       ...unless the intent is that `SimpleActivityRecordSet` will be backed by 
the provided `List`, in which case `List<RecordType>` **is** correct. This is 
what is done with `SimpleDirectory`: 
https://guacamole.apache.org/doc/guacamole-ext/org/apache/guacamole/net/auth/simple/SimpleDirectory.html#SimpleDirectory-java.util.Collection-
   
   I would suggest that the type be `Collection<RecordType>`, though, for API's 
sake.




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