initial commit

make/jdk/src/classes/build/tools/cldrconverter/CLDRConverter.java

@@ -1273,6 +1273,10 @@ private static Stream<String> extractLinks(Path tzFile) {
     // Note: the entries are alphabetically sorted, *except* the "world" region
     // code, i.e., "001". It should be the last entry for the same windows time
     // zone name entries. (cf. TimeZone_md.c)
+    //
+    // The default entries from CLDR's windowsZones.xml file can be modified
+    // with WinZoneParseHandler.endDocument(), where mapping overrides
+    // can be specified.
     private static void generateWindowsTZMappings() throws Exception {
         Files.createDirectories(Paths.get(DESTINATION_DIR, "windows", "conf"));
         Files.write(Paths.get(DESTINATION_DIR, "windows", "conf", "tzmappings"),

make/jdk/src/classes/build/tools/cldrconverter/WinZonesParseHandler.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2018, 2024, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -39,7 +39,7 @@
  * windowsZones.xml
  */
 
-class WinZonesParseHandler extends AbstractLDMLHandler<Object> {
+class WinZonesParseHandler extends AbstractLDMLHandler<String> {
     @Override
     public InputSource resolveEntity(String publicID, String systemID) throws IOException, SAXException {
         // avoid HTTP traffic to unicode.org
@@ -65,4 +65,14 @@ public void startElement(String uri, String localName, String qName, Attributes
             break;
         }
     }
+
+    @Override
+    public void endDocument() {
+        // Placeholder for patching old CLDR windowsZones mappings
+        getData().putAll(
+            Map.of(
+//              "Foo Standard Time:ZZ", "Foo/Bar"
+            )
+        );
+    }
 }