question: public boolean skipTo ( long position ) throws IOException { if ( position == position ( ) ) { return true ; } LogReader skipReader = dlm . getInputStream ( position ) ; LogRecordWithInputStream logRecord = null ; try { logRecord = nextLogRecord ( skipReader ) ; } catch ( IOException ex ) { skipReader . close ( ) ; throw ex ; } if ( null == logRecord ) { return false ; } currentPosition = logRecord . getOffset ( ) ; currentLogRecord = logRecord ; LogReader oldReader = reader ; reader = skipReader ; oldReader . close ( ) ; byte [ ] skipBuffer = new byte [ SKIP_BUFFER_SIZE ] ; while ( currentPosition < position ) { long bytesToRead = Math . min ( position - currentPosition , SKIP_BUFFER_SIZE ) ; long bytesRead = read ( skipBuffer , 0 , ( int ) bytesToRead ) ; if ( bytesRead < bytesToRead ) { return false ; } } return true ; }
target:  Position the reader at the given offset. If we fail to skip to the desired position and don't hit end of stream, return false.