<Swing Dev> JDK 9 RFR of JDK-8055059: JDK9b22 public API exposes package private classes

[Joe Darcy]

Hello,

Please review my proposed changes to address:

     JDK-8055059: JDK9b22 public API exposes package private classes
     http://cr.openjdk.java.net/~darcy/8055059.0/

Bug JDK-8055059 that the generification of swing added package-private 
types to the signatures of several protected methods. The solution is to 
the make the formerly package-private types also be protected.

Patch below.

Thanks,

-Joe

--- old/src/share/classes/javax/swing/text/GapContent.java 2014-08-18 
18:27:50.000000000 -0700
+++ new/src/share/classes/javax/swing/text/GapContent.java 2014-08-18 
18:27:49.000000000 -0700
@@ -826,7 +826,7 @@
       * Used to hold a reference to a Mark that is being reset as the
       * result of removing from the content.
       */
-    final class UndoPosRef {
+    protected final class UndoPosRef {
          UndoPosRef(MarkData rec) {
              this.rec = rec;
              this.undoLocation = rec.getOffset();
@@ -839,7 +839,7 @@
           * @param endOffset end location of inserted string.
           * @param g1 resulting end of gap.
           */
-        protected void resetLocation(int endOffset, int g1) {
+        void resetLocation(int endOffset, int g1) {
              if (undoLocation != endOffset) {
                  this.rec.index = undoLocation;
              }
@@ -849,9 +849,9 @@
          }

          /** Previous Offset of rec. */
-        protected int undoLocation;
+        private int undoLocation;
          /** Mark to reset offset. */
-        protected MarkData rec;
+        private MarkData rec;
      } // End of GapContent.UndoPosRef


--- old/src/share/classes/javax/swing/text/StringContent.java 2014-08-18 
18:27:50.000000000 -0700
+++ new/src/share/classes/javax/swing/text/StringContent.java 2014-08-18 
18:27:50.000000000 -0700
@@ -366,7 +366,7 @@
       * Used to hold a reference to a Position that is being reset as the
       * result of removing from the content.
       */
-    final class UndoPosRef {
+    protected final class UndoPosRef {
          UndoPosRef(PosRec rec) {
              this.rec = rec;
              this.undoLocation = rec.offset;
@@ -376,14 +376,14 @@
           * Resets the location of the Position to the offset when the
           * receiver was instantiated.
           */
-        protected void resetLocation() {
+        void resetLocation() {
              rec.offset = undoLocation;
          }

          /** Location to reset to when resetLocatino is invoked. */
-        protected int undoLocation;
+        private int undoLocation;
          /** Position to reset offset. */
-        protected PosRec rec;
+        private PosRec rec;
      }

      /**