Revisit equals, hashCode and toString

Author: lhotari

bookkeeper-server/src/main/java/org/apache/bookkeeper/proto/checksum/ByteBufVisitor.java

@@ -1000,58 +1000,58 @@ public String toString(int index, int length, Charset charset) {
         }
 
         @Override
-        public int hashCode() {
+        public int compareTo(ByteBuf buffer) {
             throw new UnsupportedOperationException();
         }
 
         @Override
-        public boolean equals(Object obj) {
+        public ByteBuf retain(int increment) {
             throw new UnsupportedOperationException();
         }
 
         @Override
-        public int compareTo(ByteBuf buffer) {
+        public int refCnt() {
             throw new UnsupportedOperationException();
         }
 
         @Override
-        public String toString() {
+        public ByteBuf retain() {
             throw new UnsupportedOperationException();
         }
 
         @Override
-        public ByteBuf retain(int increment) {
+        public ByteBuf touch() {
             throw new UnsupportedOperationException();
         }
 
         @Override
-        public int refCnt() {
+        public ByteBuf touch(Object hint) {
             throw new UnsupportedOperationException();
         }
 
         @Override
-        public ByteBuf retain() {
+        public boolean release() {
             throw new UnsupportedOperationException();
         }
 
         @Override
-        public ByteBuf touch() {
+        public boolean release(int decrement) {
             throw new UnsupportedOperationException();
         }
 
         @Override
-        public ByteBuf touch(Object hint) {
-            throw new UnsupportedOperationException();
+        public String toString() {
+            return Object.class.getSimpleName() + '@' + Integer.toHexString(System.identityHashCode(this));
         }
 
         @Override
-        public boolean release() {
-            throw new UnsupportedOperationException();
+        public int hashCode() {
+            return System.identityHashCode(this);
         }
 
         @Override
-        public boolean release(int decrement) {
-            throw new UnsupportedOperationException();
+        public boolean equals(Object obj) {
+            return obj == this;
         }
     }
 }