private void openStream ( ) throws IOException { if ( mClosed ) { throw new IOException ( "Stream closed" ) ; } if ( mMultiRangeChunkSize <= 0 ) { throw new IOException ( ExceptionMessage . BLOCK_SIZE_INVALID . getMessage ( mMultiRangeChunkSize ) ) ; } if ( mStream != null ) { // stream is already open return ; } final long endPos = mPos + mMultiRangeChunkSize - ( mPos % mMultiRangeChunkSize ) ; mEndPos = endPos ; mStream = createStream ( mPos , endPos ) ; }
Opens a new stream at mPos if the wrapped stream mStream is null .