Using BsonInput.mark/reset and removed BsonInput.setPosition.

Author: jyemin

bson/src/main/org/bson/BsonBinaryReader.java

@@ -359,18 +359,17 @@ public void reset() {
     protected class Mark extends AbstractBsonReader.Mark {
         private int startPosition;
         private int size;
-        private int currentPosition;
 
         protected Mark() {
             super();
             startPosition = BsonBinaryReader.this.getContext().startPosition;
             size = BsonBinaryReader.this.getContext().size;
-            currentPosition = BsonBinaryReader.this.bsonInput.getPosition();
+            BsonBinaryReader.this.bsonInput.mark(Integer.MAX_VALUE);
         }
 
         protected void reset() {
             super.reset();
-            BsonBinaryReader.this.bsonInput.setPosition(currentPosition);
+            BsonBinaryReader.this.bsonInput.reset();
             BsonBinaryReader.this.setContext(new Context((Context) getParentContext(), getContextType(), startPosition, size));
         }
     }

bson/src/main/org/bson/io/BsonInput.java

@@ -33,13 +33,6 @@ public interface BsonInput extends Closeable {
      */
     int getPosition();
 
-    /**
-     * Sets the position in the stream
-     *
-     * @param newPosition the new position
-     */
-    void setPosition(int newPosition);
-
     /**
      * Reads a single byte from the stream
      *

bson/src/main/org/bson/io/ByteBufferBsonInput.java

@@ -53,12 +53,6 @@ public int getPosition() {
         return buffer.position();
     }
 
-    @Override
-    public void setPosition(final int newPosition) {
-        ensureOpen();
-        buffer.position(newPosition);
-    }
-
 
     @Override
     public byte readByte() {