2 files changed, 15 insertions, 12 deletions

diff --git a/luni/src/main/java/java/lang/Character.java b/luni/src/main/java/java/lang/Character.java
index 8efd6cd..e920a3e 100644
--- a/luni/src/main/java/java/lang/Character.java
+++ b/luni/src/main/java/java/lang/Character.java
@@ -2530,25 +2530,28 @@ public final class Character implements Serializable, Comparable<Character> {
     }
 
     /**
-     * Gets the Unicode directionality of the specified character.
-     *
-     * @param codePoint
-     *            the Unicode code point to get the directionality of.
-     * @return the Unicode directionality of {@code codePoint}.
+     * Returns the Unicode directionality of the given code point.
+     * This will be one of the {@code DIRECTIONALITY_} constants.
+     * For characters whose directionality is undefined, or whose
+     * directionality has no appropriate constant in this class,
+     * {@code DIRECTIONALITY_UNDEFINED} is returned.
      */
     public static byte getDirectionality(int codePoint) {
         if (getType(codePoint) == Character.UNASSIGNED) {
             return Character.DIRECTIONALITY_UNDEFINED;
         }
 
-        byte directionality = getDirectionalityImpl(codePoint);
-        if (directionality == -1) {
-            return -1;
+        byte directionality = getIcuDirectionality(codePoint);
+        if (directionality >= 0 && directionality < DIRECTIONALITY.length) {
+            return DIRECTIONALITY[directionality];
         }
-        return DIRECTIONALITY[directionality];
+        return Character.DIRECTIONALITY_UNDEFINED;
     }
 
-    private static native byte getDirectionalityImpl(int codePoint);
+    /**
+     * @hide - internal use only.
+     */
+    public static native byte getIcuDirectionality(int codePoint);
 
     /**
      * Indicates whether the specified character is mirrored.
diff --git a/luni/src/main/native/java_lang_Character.cpp b/luni/src/main/native/java_lang_Character.cpp
index 2d1fcfc..4022f4b 100644
--- a/luni/src/main/native/java_lang_Character.cpp
+++ b/luni/src/main/native/java_lang_Character.cpp
@@ -33,7 +33,7 @@ static jint Character_getTypeImpl(JNIEnv*, jclass, jint codePoint) {
     return u_charType(codePoint);
 }
 
-static jbyte Character_getDirectionalityImpl(JNIEnv*, jclass, jint codePoint) {
+static jbyte Character_getIcuDirectionality(JNIEnv*, jclass, jint codePoint) {
     return u_charDirection(codePoint);
 }
 
@@ -166,7 +166,7 @@ static jboolean Character_isIdeographic(JNIEnv*, jclass, jint codePoint) {
 
 static JNINativeMethod gMethods[] = {
     NATIVE_METHOD(Character, digitImpl, "!(II)I"),
-    NATIVE_METHOD(Character, getDirectionalityImpl, "!(I)B"),
+    NATIVE_METHOD(Character, getIcuDirectionality, "!(I)B"),
     NATIVE_METHOD(Character, getNameImpl, "(I)Ljava/lang/String;"),
     NATIVE_METHOD(Character, getNumericValueImpl, "!(I)I"),
     NATIVE_METHOD(Character, getTypeImpl, "!(I)I"),