question: public void appendData ( ParsableByteArray buffer , int length ) { int remainingWriteLength = length ; while ( remainingWriteLength > 0 ) { if ( dataQueue . isEmpty ( ) || lastFragmentOffset == fragmentLength ) { lastFragmentOffset = 0 ; lastFragment = fragmentPool . allocateDirect ( ) ; dataQueue . add ( lastFragment ) ; } int thisWriteLength = Math . min ( remainingWriteLength , fragmentLength - lastFragmentOffset ) ; buffer . readBytes ( lastFragment , lastFragmentOffset , thisWriteLength ) ; lastFragmentOffset += thisWriteLength ; remainingWriteLength -= thisWriteLength ; } totalBytesWritten += length ; }
target:  Appends data to the rolling buffer.