public static void main()

in src/main/java/org/apache/xmlbeans/impl/tool/RunXQuery.java [45:223]
142 lines of code
30 McCabe index (conditional complexity)

    public static void main(String[] args) throws Exception {
        Set<String> flags = new HashSet<>();
        flags.add("h");
        flags.add("help");
        flags.add("usage");
        flags.add("license");
        flags.add("version");
        flags.add("verbose");
        flags.add("pretty");

        CommandLine cl =
            new CommandLine(
                args, flags,
                Arrays.asList("q", "qf"));

        if (cl.getOpt("h") != null || cl.getOpt("help") != null || cl.getOpt("usage") != null) {
            printUsage();
            System.exit(0);
            return;
        }

        String[] badopts = cl.getBadOpts();
        if (badopts.length > 0) {
            for (String badopt : badopts) {
                System.out.println("Unrecognized option: " + badopt);
            }
            printUsage();
            System.exit(0);
            return;
        }

        if (cl.getOpt("license") != null) {
            CommandLine.printLicense();
            System.exit(0);
            return;
        }

        if (cl.getOpt("version") != null) {
            CommandLine.printVersion();
            System.exit(0);
            return;
        }

        args = cl.args();

        if (args.length == 0) {
            printUsage();
            System.exit(0);
            return;
        }

        boolean verbose = cl.getOpt("verbose") != null;
        boolean pretty = cl.getOpt("pretty") != null;

        //
        // Get and compile the query
        //

        String query = cl.getOpt("q");
        String queryfile = cl.getOpt("qf");

        if (query == null && queryfile == null) {
            System.err.println("No query specified");
            System.exit(0);
            return;
        }

        if (query != null && queryfile != null) {
            System.err.println("Specify -qf or -q, not both.");
            System.exit(0);
            return;
        }

        try {
            if (queryfile != null) {
                File queryFile = new File(queryfile);
                InputStream is = Files.newInputStream(queryFile.toPath());
                StringBuilder sb = new StringBuilder();
                try (InputStreamReader r = new InputStreamReader(is, StandardCharsets.ISO_8859_1)) {

                    for (; ; ) {
                        int ch = r.read();

                        if (ch < 0) {
                            break;
                        }

                        sb.append((char) ch);
                    }
                }
                is.close();
                query = sb.toString();
            }
        } catch (Throwable e) {
            if (ExceptionUtil.isFatal(e)) {
                ExceptionUtil.rethrow(e);
            }
            System.err.println("Cannot read query file: " + e.getMessage());
            System.exit(1);
            return;
        }

        if (verbose) {
            System.out.println("Compile Query:");
            System.out.println(query);
            System.out.println();
        }

        try {
            query = XmlBeans.compileQuery(query);
        } catch (Exception e) {
            System.err.println("Error compiling query: " + e.getMessage());
            System.exit(1);
            return;
        }

        //
        // Get the instance
        //

        File[] files = cl.getFiles();

        for (File file : files) {
            XmlObject x;

            try {
                if (verbose) {
                    try(InputStream is = Files.newInputStream(file.toPath())) {
                        for (; ; ) {
                            int ch = is.read();

                            if (ch < 0) {
                                break;
                            }

                            System.out.write(ch);
                        }
                    }
                    System.out.println();
                }

                x = XmlObject.Factory.parse(file);
            } catch (Throwable e) {
                System.err.println("Error parsing instance: " + e.getMessage());
                System.exit(1);
                return;
            }

            if (verbose) {
                System.out.println("Executing Query...");
                System.err.println();
            }

            XmlObject[] result;

            try {
                result = x.execQuery(query);
            } catch (Throwable e) {
                System.err.println("Error executing query: " + e.getMessage());
                System.exit(1);
                return;
            }

            if (verbose) {
                System.out.println("Query Result:");
            }

            XmlOptions opts = new XmlOptions();
            opts.setSaveOuter();
            if (pretty) {
                opts.setSavePrettyPrint();
            }

            for (XmlObject xmlObject : result) {
                xmlObject.save(System.out, opts);
                System.out.println();
            }
        }
    }