avoiding NoSuchMethod exception (google#6658)

java/com/google/flatbuffers/ByteBufferReadWriteBuf.java

@@ -2,6 +2,7 @@
 
 import java.nio.ByteBuffer;
 import java.nio.ByteOrder;
+import java.nio.Buffer;
 
 public class ByteBufferReadWriteBuf implements ReadWriteBuf {
 
@@ -117,9 +118,9 @@ public void set(int index, byte value) {
   public void set(int index, byte[] value, int start, int length) {
     requestCapacity(index + (length - start));
     int curPos = buffer.position();
-    buffer.position(index);
+    ((Buffer) buffer).position(index);
     buffer.put(value, start, length);
-    buffer.position(curPos);
+    ((Buffer) buffer).position(curPos);
   }
 
   @Override
@@ -154,7 +155,7 @@ public void setDouble(int index, double value) {
 
   @Override
   public int writePosition() {
-    return buffer.position();
+    return ((Buffer) buffer).position();
   }
 
   @Override

java/com/google/flatbuffers/ByteBufferUtil.java

@@ -19,6 +19,7 @@
 import static com.google.flatbuffers.Constants.*;
 
 import java.nio.ByteBuffer;
+import java.nio.Buffer;
 
 /// @file
 /// @addtogroup flatbuffers_java_api
@@ -49,7 +50,7 @@ public static int getSizePrefix(ByteBuffer bb) {
      */
     public static ByteBuffer removeSizePrefix(ByteBuffer bb) {
         ByteBuffer s = bb.duplicate();
-        s.position(s.position() + SIZE_PREFIX_LENGTH);
+        ((Buffer) s).position(s.position() + SIZE_PREFIX_LENGTH);
         return s;
     }
 

java/com/google/flatbuffers/FlatBufferBuilder.java

@@ -273,10 +273,10 @@ static ByteBuffer growByteBuffer(ByteBuffer bb, ByteBufferFactory bb_factory) {
             new_buf_size = (old_buf_size & 0xC0000000) != 0 ? MAX_BUFFER_SIZE : old_buf_size << 1;
         }
 
-        bb.position(0);
+        ((Buffer) bb).position(0);
         ByteBuffer nbb = bb_factory.newByteBuffer(new_buf_size);
         new_buf_size = nbb.clear().capacity(); // Ensure the returned buffer is treated as empty
-        nbb.position(new_buf_size - old_buf_size);
+        ((Buffer) nbb).position(new_buf_size - old_buf_size);
         nbb.put(bb);
         return nbb;
     }
@@ -527,7 +527,7 @@ public ByteBuffer createUnintializedVector(int elem_size, int num_elems, int ali
         int length = elem_size * num_elems;
         startVector(elem_size, num_elems, alignment);
 
-        bb.position(space -= length);
+        ((Buffer) bb).position(space -= length);
 
         // Slice and limit the copy vector to point to the 'array'
         ByteBuffer copy = bb.slice().order(ByteOrder.LITTLE_ENDIAN);
@@ -602,7 +602,7 @@ public int createString(CharSequence s) {
         int length = utf8.encodedLength(s);
         addByte((byte)0);
         startVector(1, length, 1);
-        bb.position(space -= length);
+        ((Buffer) bb).position(space -= length);
         utf8.encodeUtf8(s, bb);
         return endVector();
     }
@@ -617,7 +617,7 @@ public int createString(ByteBuffer s) {
         int length = s.remaining();
         addByte((byte)0);
         startVector(1, length, 1);
-        bb.position(space -= length);
+        ((Buffer) bb).position(space -= length);
         bb.put(s);
         return endVector();
     }
@@ -631,7 +631,7 @@ public int createString(ByteBuffer s) {
     public int createByteVector(byte[] arr) {
         int length = arr.length;
         startVector(1, length, 1);
-        bb.position(space -= length);
+        ((Buffer) bb).position(space -= length);
         bb.put(arr);
         return endVector();
     }
@@ -646,7 +646,7 @@ public int createByteVector(byte[] arr) {
      */
     public int createByteVector(byte[] arr, int offset, int length) {
         startVector(1, length, 1);
-        bb.position(space -= length);
+        ((Buffer) bb).position(space -= length);
         bb.put(arr, offset, length);
         return endVector();
     }
@@ -663,7 +663,7 @@ public int createByteVector(byte[] arr, int offset, int length) {
     public int createByteVector(ByteBuffer byteBuffer) {
         int length = byteBuffer.remaining();
         startVector(1, length, 1);
-        bb.position(space -= length);
+        ((Buffer) bb).position(space -= length);
         bb.put(byteBuffer);
         return endVector();
     }
@@ -953,7 +953,7 @@ protected void finish(int root_table, boolean size_prefix) {
         if (size_prefix) {
             addInt(bb.capacity() - space);
         }
-        bb.position(space);
+        ((Buffer) bb).position(space);
         finished = true;
     }
 
@@ -1067,7 +1067,7 @@ private int dataStart() {
     public byte[] sizedByteArray(int start, int length){
         finished();
         byte[] array = new byte[length];
-        bb.position(start);
+        ((Buffer) bb).position(start);
         bb.get(array);
         return array;
     }
@@ -1090,7 +1090,7 @@ public byte[] sizedByteArray() {
     public InputStream sizedInputStream() {
         finished();
         ByteBuffer duplicate = bb.duplicate();
-        duplicate.position(space);
+        ((Buffer) duplicate).position(space);
         duplicate.limit(bb.capacity());
         return new ByteBufferBackedInputStream(duplicate);
     }

java/com/google/flatbuffers/FlexBuffers.java

@@ -23,6 +23,7 @@
 
 import java.math.BigInteger;
 import java.nio.ByteBuffer;
+import java.nio.Buffer;
 import java.nio.charset.StandardCharsets;
 
 /// @file
@@ -688,7 +689,7 @@ public static Blob empty() {
          */
         public ByteBuffer data() {
             ByteBuffer dup = ByteBuffer.wrap(bb.data());
-            dup.position(end);
+            ((Buffer) dup).position(end);
             dup.limit(end + size());
             return dup.asReadOnlyBuffer().slice();
         }

java/com/google/flatbuffers/Table.java

@@ -18,6 +18,7 @@
 
 import static com.google.flatbuffers.Constants.*;
 import java.nio.ByteBuffer;
+import java.nio.Buffer;
 import java.nio.ByteOrder;
 
 /// @cond FLATBUFFERS_INTERNAL
@@ -152,7 +153,7 @@ protected ByteBuffer __vector_as_bytebuffer(int vector_offset, int elem_size) {
     if (o == 0) return null;
     ByteBuffer bb = this.bb.duplicate().order(ByteOrder.LITTLE_ENDIAN);
     int vectorstart = __vector(o);
-    bb.position(vectorstart);
+    ((Buffer) bb).position(vectorstart);
     bb.limit(vectorstart + __vector_len(o) * elem_size);
     return bb;
   }
@@ -174,7 +175,7 @@ protected ByteBuffer __vector_in_bytebuffer(ByteBuffer bb, int vector_offset, in
     int vectorstart = __vector(o);
     bb.rewind();
     bb.limit(vectorstart + __vector_len(o) * elem_size);
-    bb.position(vectorstart);
+    ((Buffer) bb).position(vectorstart);
     return bb;
   }
 

java/com/google/flatbuffers/Utf8Old.java

@@ -17,6 +17,7 @@
 package com.google.flatbuffers;
 
 import java.nio.ByteBuffer;
+import java.nio.Buffer;
 import java.nio.CharBuffer;
 import java.nio.charset.CharacterCodingException;
 import java.nio.charset.CharsetDecoder;
@@ -87,7 +88,7 @@ public String decodeUtf8(ByteBuffer buffer, int offset, int length) {
     CharsetDecoder decoder = CACHE.get().decoder;
     decoder.reset();
     buffer = buffer.duplicate();
-    buffer.position(offset);
+    ((Buffer) buffer).position(offset);
     buffer.limit(offset + length);
     try {
       CharBuffer result = decoder.decode(buffer);

java/com/google/flatbuffers/Utf8Safe.java

@@ -31,6 +31,7 @@
 package com.google.flatbuffers;
 
 import java.nio.ByteBuffer;
+import java.nio.Buffer;
 import static java.lang.Character.MAX_SURROGATE;
 import static java.lang.Character.MIN_SUPPLEMENTARY_CODE_POINT;
 import static java.lang.Character.MIN_SURROGATE;
@@ -310,7 +311,7 @@ private static void encodeUtf8Buffer(CharSequence in, ByteBuffer out) {
       }
       if (inIx == inLength) {
         // Successfully encoded the entire string.
-        out.position(outIx + inIx);
+        ((Buffer) out).position(outIx + inIx);
         return;
       }
 
@@ -353,7 +354,7 @@ private static void encodeUtf8Buffer(CharSequence in, ByteBuffer out) {
       }
 
       // Successfully encoded the entire string.
-      out.position(outIx);
+      ((Buffer) out).position(outIx);
     } catch (IndexOutOfBoundsException e) {
       // TODO(nathanmittler): Consider making the API throw IndexOutOfBoundsException instead.
 
@@ -434,7 +435,7 @@ public void encodeUtf8(CharSequence in, ByteBuffer out) {
       int start = out.arrayOffset();
       int end = encodeUtf8Array(in, out.array(), start + out.position(),
           out.remaining());
-      out.position(end - start);
+      ((Buffer) out).position(end - start);
     } else {
       encodeUtf8Buffer(in, out);
     }