Render Filters.and as {$and : [] } if the list of filters is empty. That way, the driver leaves it to the server to decide the meaning of an empty array for both $and and $or operators, which currently is to return an error.

 JAVA-1828

Author: jyemin

driver-core/src/main/com/mongodb/client/model/Filters.java

@@ -550,6 +550,10 @@ public <TDocument> BsonDocument toBsonDocument(final Class<TDocument> documentCl
                 }
             }
 
+            if (andRenderable.isEmpty()) {
+                andRenderable.append("$and", new BsonArray());
+            }
+
             return andRenderable;
         }
 

driver-core/src/test/unit/com/mongodb/client/model/FiltersSpecification.groovy

@@ -116,12 +116,24 @@ class FiltersSpecification extends Specification {
         toBson(exists('x', false)) == parse('{x : {$exists : false} }')
     }
 
+    def 'or should render empty or using $or'() {
+        expect:
+        toBson(or([])) == parse('{$or : []}')
+        toBson(or()) == parse('{$or : []}')
+    }
+
     def 'should render $or'() {
         expect:
         toBson(or([eq('x', 1), eq('y', 2)])) == parse('{$or : [{x : 1}, {y : 2}]}')
         toBson(or(eq('x', 1), eq('y', 2))) == parse('{$or : [{x : 1}, {y : 2}]}')
     }
 
+    def 'and should render empty and using $and'() {
+        expect:
+        toBson(and([])) == parse('{$and : []}')
+        toBson(and()) == parse('{$and : []}')
+    }
+
     def 'and should render and without using $and'() {
         expect:
         toBson(and([eq('x', 1), eq('y', 2)])) == parse('{x : 1, y : 2}')