public void setFiles ( final List < File > files ) { if ( files == null && this . files == null ) { return ; } else if ( files == null ) { removeChild ( this . files ) ; this . files = null ; } else if ( this . files == null ) { this . files = new FileList ( CommonConstants . CS_FILE_TITLE , files ) ; appendChild ( this . files , false ) ; } else { this . files . setValue ( files ) ; } }
Sets the list of additional files needed by the book .