CLDR-17504 update SupplementalDataInfo reader to not use reentrant XP…

…athParts

- push XPathParts.size() API up to XPathValue.size()
- use SimpleXPathParts instead of XPathParts in SupplementalDataInfo

tools/cldr-code/src/main/java/org/unicode/cldr/util/SimpleXPathParts.java

@@ -63,4 +63,9 @@ protected void handleAddAttribute(String attribute, String value) {
     static SimpleXPathParts getFrozenInstance(String xpath) {
         return new SimpleXPathParts(xpath);
     }
+
+    @Override
+    public int size() {
+        return elements.size();
+    }
 }

tools/cldr-code/src/main/java/org/unicode/cldr/util/SupplementalDataInfo.java

@@ -1372,7 +1372,7 @@ public void cleanup() {
         @Override
         public void handlePathValue(String path, String value) {
             try {
-                XPathParts parts = XPathParts.getFrozenInstance(path);
+                XPathValue parts = SimpleXPathParts.getFrozenInstance(path);
                 String level0 = parts.getElement(0);
                 String level1 = parts.size() < 2 ? null : parts.getElement(1);
                 String level2 = parts.size() < 3 ? null : parts.getElement(2);

tools/cldr-code/src/main/java/org/unicode/cldr/util/XPathParts.java

@@ -381,7 +381,7 @@ public boolean containsAttributeValue(String attribute, String value) {
         return false;
     }
 
-    /** How many elements are in this xpath? */
+    @Override
     public int size() {
         return elements.size();
     }

tools/cldr-code/src/main/java/org/unicode/cldr/util/XPathValue.java

@@ -11,4 +11,7 @@ public interface XPathValue {
      * Returns null if there's nothing.
      */
     String getAttributeValue(int i, String string);
+
+    /** How many elements are in this xpath? */
+    int size();
 }