question: void triggerWildcardExpander ( final Collection < File > allFiles , final WildcardContext wildcardContext ) throws IOException { LOG . debug ( "wildcard resources: {}" , allFiles ) ; if ( allFiles . isEmpty ( ) ) { final String message = String . format ( "No resource found for wildcard: %s" , wildcardContext . getWildcard ( ) ) ; LOG . warn ( message ) ; throw new IOException ( message ) ; } if ( wildcardExpanderHandler != null ) { try { wildcardExpanderHandler . apply ( allFiles ) ; } catch ( final IOException e ) { throw e ; } catch ( final Exception e ) { LOG . debug ( "wildcard expanding error. Reporting original exception" , e ) ; throw new IOException ( "Exception during expanding wildcard: " + e . getMessage ( ) ) ; } } }
target:  Uses the wildcardExpanderHandler to process all found files and directories.