Support CommaSeparatedTuples including commas (#14535)

* Test parsing CSV values including commas

* Remove commented line

Author: gcatanese

modules/openapi-generator-cli/src/test/java/org/openapitools/codegen/cmd/utils/OptionUtilsTest.java

@@ -52,6 +52,10 @@ public void testParseCommaSeparatedTuples() throws Exception {
         doTupleListTest("a=1,=,c=3", asList(Pair.of("a", "1"), Pair.of("c", "3")));
         doTupleListTest("", emptyPairList());
         doTupleListTest(null, emptyPairList());
+        doTupleListTest("a=1,b=2,c=\"3,4,5\"",
+                asList(Pair.of("a", "1"), Pair.of("b", "2"),
+                        Pair.of("c", "\"3,4,5\"")));
+
     }
 
     private static void doTupleListTest(String input, List<Pair<String, String>> expectedResults) {

modules/openapi-generator/src/main/java/org/openapitools/codegen/utils/OptionUtils.java

@@ -51,7 +51,8 @@ public static List<String> splitCommaSeparatedList(String input) {
         List<String> results = new ArrayList<String>();
 
         if(input != null && !input.isEmpty()) {
-            for (String value : input.split(",")) {
+            String[] tokens = input.split(",(?=(?:[^\"]*\"[^\"]*\")*[^\"]*$)", -1);
+            for (String value : tokens) {
                 if(isNotEmpty(value))
                 results.add(value);
             }