Add Java9 overrides to specialize return types

src/main/java/java/nio/Buffer.java

@@ -86,7 +86,7 @@ public final int capacity () {
      *
      * @return this buffer.
      */
-    public final Buffer clear () {
+    public Buffer clear() {
         position = 0;
         mark = UNSET_MARK;
         limit = capacity;
@@ -100,7 +100,7 @@ public final Buffer clear () {
      *
      * @return this buffer.
      */
-    public final Buffer flip () {
+    public Buffer flip() {
         limit = position;
         position = 0;
         mark = UNSET_MARK;
@@ -139,7 +139,7 @@ public final int limit () {
      * @return this buffer.
      * @exception IllegalArgumentException if <code>newLimit</code> is invalid.
      */
-    public final Buffer limit (int newLimit) {
+    public Buffer limit(int newLimit) {
         if (newLimit < 0 || newLimit > capacity) {
             throw new IllegalArgumentException();
         }
@@ -159,7 +159,7 @@ public final Buffer limit (int newLimit) {
      *
      * @return this buffer.
      */
-    public final Buffer mark () {
+    public Buffer mark() {
         mark = position;
         return this;
     }
@@ -179,7 +179,7 @@ public final int position () {
      * @return this buffer.
      * @exception IllegalArgumentException if <code>newPosition</code> is invalid.
      */
-    public final Buffer position (int newPosition) {
+    public Buffer position(int newPosition) {
         if (newPosition < 0 || newPosition > limit) {
             throw new IllegalArgumentException();
         }
@@ -204,7 +204,7 @@ public final int remaining () {
      * @return this buffer.
      * @exception InvalidMarkException if the mark is not set.
      */
-    public final Buffer reset () {
+    public Buffer reset() {
         if (mark == UNSET_MARK) {
             throw new InvalidMarkException();
         }
@@ -218,7 +218,7 @@ public final Buffer reset () {
      *
      * @return this buffer.
      */
-    public final Buffer rewind () {
+    public Buffer rewind() {
         position = 0;
         mark = UNSET_MARK;
         return this;

src/main/java/java/nio/ByteBuffer.java

@@ -20,6 +20,7 @@
 import elemental2.core.ArrayBuffer;
 import elemental2.core.ArrayBufferView;
 import elemental2.core.Int8Array;
+import jsinterop.base.Js;
 import org.gwtproject.nio.HasArrayBufferView;
 import org.gwtproject.nio.Numbers;
 import org.gwtproject.nio.TypedArrayHelper;
@@ -558,6 +559,41 @@ public int hashCode () {
         return hash;
     }
 
+    @Override
+    public ByteBuffer limit(int newLimit) {
+        return Js.uncheckedCast(super.limit(newLimit));
+    }
+
+    @Override
+    public ByteBuffer position(int newPosition) {
+        return Js.uncheckedCast(super.position(newPosition));
+    }
+
+    @Override
+    public ByteBuffer mark() {
+        return Js.uncheckedCast(super.mark());
+    }
+
+    @Override
+    public ByteBuffer reset() {
+        return Js.uncheckedCast(super.reset());
+    }
+
+    @Override
+    public ByteBuffer clear() {
+        return Js.uncheckedCast(super.clear());
+    }
+
+    @Override
+    public ByteBuffer flip() {
+        return Js.uncheckedCast(super.flip());
+    }
+
+    @Override
+    public ByteBuffer rewind() {
+        return Js.uncheckedCast(super.rewind());
+    }
+
     /** Returns the byte order used by this buffer when converting bytes from/to other primitive
      * types.
      * <p> The default byte order of byte buffer is always {@link ByteOrder#BIG_ENDIAN BIG_ENDIAN}

src/main/java/java/nio/FloatBuffer.java

@@ -19,6 +19,7 @@
 
 import elemental2.core.ArrayBufferView;
 import elemental2.core.Float32Array;
+import jsinterop.base.Js;
 
 /** A buffer of floats.
  * <p>
@@ -112,6 +113,41 @@ public int compareTo (FloatBuffer otherBuffer) {
         return remaining() - otherBuffer.remaining();
     }
 
+    @Override
+    public FloatBuffer limit(int newLimit) {
+        return Js.uncheckedCast(super.limit(newLimit));
+    }
+
+    @Override
+    public FloatBuffer position(int newPosition) {
+        return Js.uncheckedCast(super.position(newPosition));
+    }
+
+    @Override
+    public FloatBuffer mark() {
+        return Js.uncheckedCast(super.mark());
+    }
+
+    @Override
+    public FloatBuffer reset() {
+        return Js.uncheckedCast(super.reset());
+    }
+
+    @Override
+    public FloatBuffer clear() {
+        return Js.uncheckedCast(super.clear());
+    }
+
+    @Override
+    public FloatBuffer flip() {
+        return Js.uncheckedCast(super.flip());
+    }
+
+    @Override
+    public FloatBuffer rewind() {
+        return Js.uncheckedCast(super.rewind());
+    }
+
     /** Returns a duplicated buffer that shares its content with this buffer.
      * <p> The duplicated buffer's position, limit, capacity and mark are the same as this buffer.
      * The duplicated buffer's read-only property and byte order are same as this buffer too. </p>

src/main/java/java/nio/ShortBuffer.java

@@ -19,6 +19,7 @@
 
 import elemental2.core.ArrayBufferView;
 import elemental2.core.Int16Array;
+import jsinterop.base.Js;
 
 /** A buffer of shorts.
  * <p> A short buffer can be created in either of the following ways: </p>
@@ -108,6 +109,41 @@ public int compareTo (ShortBuffer otherBuffer) {
         return remaining() - otherBuffer.remaining();
     }
 
+    @Override
+    public ShortBuffer limit(int newLimit) {
+        return Js.uncheckedCast(super.limit(newLimit));
+    }
+
+    @Override
+    public ShortBuffer position(int newPosition) {
+        return Js.uncheckedCast(super.position(newPosition));
+    }
+
+    @Override
+    public ShortBuffer mark() {
+        return Js.uncheckedCast(super.mark());
+    }
+
+    @Override
+    public ShortBuffer reset() {
+        return Js.uncheckedCast(super.reset());
+    }
+
+    @Override
+    public ShortBuffer clear() {
+        return Js.uncheckedCast(super.clear());
+    }
+
+    @Override
+    public ShortBuffer flip() {
+        return Js.uncheckedCast(super.flip());
+    }
+
+    @Override
+    public ShortBuffer rewind() {
+        return Js.uncheckedCast(super.rewind());
+    }
+
     /** Returns a duplicated buffer that shares its content with this buffer.
      * <p> The duplicated buffer's position, limit, capacity and mark are the same as this buffer.
      * The duplicated buffer's read-only property and byte order are the same as this buffer's.