Java 类org.kohsuke.args4j.OptionHandlerRegistry 实例源码

private void printUsage(PrintWriter writer) {
    // fix defaults for options like help and other 0-arg booleans
    OptionHandlerRegistry.getRegistry().registerHandler(Boolean.class, BooleanNoDefOptionHandler.class);
    OptionHandlerRegistry.getRegistry().registerHandler(boolean.class, BooleanNoDefOptionHandler.class);

    ParserProperties prop = ParserProperties.defaults()
            .withUsageWidth(80)
            .withOptionSorter(null);

    ByteArrayOutputStream buf = new ByteArrayOutputStream();

    // new args instance to get correct defaults
    new CmdLineParser(new CliArgs(), prop)
    .printUsage(new OutputStreamWriter(buf, StandardCharsets.UTF_8), null);

    writer.println(MessageFormat.format(Messages.UsageHelp.replace("${tab}", "\t"),
            new String(buf.toByteArray(), StandardCharsets.UTF_8),
            DangerStatementOptionHandler.getMetaVariable() + '\n' + DbObjTypeOptionHandler.getMetaVariable()));
}

private static void registerHandlersIfNeeded() {
    if (registeredHandlers) {
        return;
    }

    synchronized (CmdLine.class) {
        if (registeredHandlers) {
            return;
        }

        OptionHandlerRegistry
            .getRegistry()
            .registerHandler(Duration.class, DurationOptionHandler.class);
        OptionHandlerRegistry
            .getRegistry()
            .registerHandler(Optional.class, OptionalOptionHandler.class);
        OptionHandlerRegistry
            .getRegistry()
            .registerHandler(OptionalLimit.class, OptionalLimitOptionHandler.class);

        registeredHandlers = true;
    }
}

/**
 * Parses and checks the program arguments. If the arguments are invalid or the user requested
 * the help message, this method returns <code>false</code> and writes the message for the user.
 * If the parsing is successful, this method does not print anything to the output.
 * 
 * @param args
 *            the arguments to parse
 * @return <code>true</code> if the arguments were successfully parsed, <code>false</code> if
 *         arguments are invalid or the user requested the help message (<code>false</code>
 *         generally means that SETTE should stop)
 */
public boolean parse(@NonNull String... args) {
    // register handler for tool and set the current configuration for it
    OptionHandlerRegistry.getRegistry().registerHandler(SetteToolConfiguration.class,
            ToolOptionHandler.class);
    ToolOptionHandler.configuration = configuration;

    // parse args with preset properties
    ParserProperties parserProps = ParserProperties.defaults()
            .withShowDefaults(true)
            .withUsageWidth(80);
    CmdLineParser parser = new CmdLineParser(this, parserProps);

    try {
        parser.parseArgument(args);

        if (help) {
            printHelp(parser);
            return false;
        } else {
            return true;
        }
    } catch (CmdLineException ex) {
        errorOutput.println(ex.getMessage());
        printHelp(parser);
        return false;
    }
}