returns true iff the checksum is not null and if the file has not been written by a lucene version greater or equal to lucene 4.8 concode_field_sep Version writtenBy concode_elem_sep String name concode_elem_sep long length concode_elem_sep String checksum concode_elem_sep BytesRef hash concode_field_sep void writeTo concode_elem_sep void readFrom concode_elem_sep Version writtenBy concode_elem_sep String name concode_elem_sep long length concode_elem_sep String checksum concode_elem_sep boolean isSame concode_elem_sep String toString concode_elem_sep StoreFileMetaData readStoreFileMetaData concode_elem_sep BytesRef hash
boolean function ( ) { return checksum != null && ( writtenBy == null || writtenBy . onOrAfter ( Version . LUCENE_4_8 ) == false ) ; }