CologneBuffer does not need to implement CharSequence which then does not need to implement charAt and subSequence, which are themselves not used.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/codec/trunk@1063350 13f79535-47bb-0310-9956-ffa450edef68

Author: garydgregory

src/java/org/apache/commons/codec/language/ColognePhonetic.java

@@ -180,7 +180,7 @@
  */
 public class ColognePhonetic implements StringEncoder {
 
-    private abstract class CologneBuffer implements CharSequence {
+    private abstract class CologneBuffer {
 
         protected final char[] data;
         protected int length = 0;
@@ -191,15 +191,8 @@ public CologneBuffer(char[] data) {
         }
 
         public CologneBuffer(int buffSize) {
-            data = new char[buffSize];
-        }
-
-        public char charAt(int index) {
-            if (index < length) {
-                return data[index];
-            } else {
-                throw new IndexOutOfBoundsException();
-            }
+            this.data = new char[buffSize];
+            this.length = 0;
         }
 
         protected abstract char[] copyData(int start, final int length);
@@ -210,12 +203,6 @@ public int length() {
             return length;
         }
 
-        public CharSequence subSequence(int start, int end) {
-            final int length = end - start;
-            char[] newData = copyData(start, length);
-            return createCologneBuffer(newData);
-        }
-
         public String toString() {
             return new String(copyData(0, length));
         }