question: public void hookCommandLineListener ( CommandLine cmdLine ) throws Exception { List < CommandLineArgument [ ] > allCommandLineList = new ArrayList < > ( ) ; Map < String , CommandLineListener > extMap = new HashMap < > ( ) ; for ( Map . Entry < Extension , ExtensionHook > entry : extensionHooks . entrySet ( ) ) { ExtensionHook hook = entry . getValue ( ) ; CommandLineArgument [ ] arg = hook . getCommandLineArgument ( ) ; if ( arg . length > 0 ) { allCommandLineList . add ( arg ) ; } Extension extension = entry . getKey ( ) ; if ( extension instanceof CommandLineListener ) { CommandLineListener cli = ( CommandLineListener ) extension ; List < String > exts = cli . getHandledExtensions ( ) ; if ( exts != null ) { for ( String ext : exts ) { extMap . put ( ext , cli ) ; } } } } cmdLine . parse ( allCommandLineList , extMap ) ; }
target:  Hook command line listener with the command line processor