问Java CLI解析器

EN

public class Test{

@Test
public void nestedSubCommandTest() {
    GeneralOptions generalOpts = new GeneralOptions();
    JCommander jc = new JCommander(generalOpts);

    Command command = new Command();
    JCommander jc_command = addCommand(jc, "command", command);

    SubCommand1 subcommand1 = new SubCommand1();
    JCommander jc_subcommand1 = addCommand(jc_command, "subcommand1",
            subcommand1);

    SubCommand2 subcommand2 = new SubCommand2();
    JCommander jc_subcommand2 = addCommand(jc_subcommand1, "subcommand2",
            subcommand2);

    SubCommand3 subcommand3 = new SubCommand3();
    addCommand(jc_subcommand2, "subcommand3", subcommand3);

    jc.parse("--general-opt", 
        "command", "--opt", 
        "subcommand1",
        "subcommand2", "--sub-opt2", 
        "subcommand3", "--sub-opt3");

    assertTrue(generalOpts.opt);// --general-opt was set
    assertTrue(command.opt);// command --opt was set
    assertFalse(subcommand1.opt);// subcommand1 --sub-opt1 was not set
    assertTrue(subcommand2.opt);// subcommand2 --sub-opt2 was set
    assertTrue(subcommand3.opt);// subcommand3 --sub-opt3 was set
}

private static JCommander addCommand(JCommander parentCommand,
        String commandName, Object commandObject) {
    parentCommand.addCommand(commandName, commandObject);
    return parentCommand.getCommands().get(commandName);
}

public static class GeneralOptions {
    @Parameter(names = "--general-opt")
    public boolean opt;
}

@Parameters
public static class Command {
    @Parameter(names = "--opt")
    public boolean opt;
}

@Parameters
public static class SubCommand1 {
    @Parameter(names = "--sub-opt1")
    public boolean opt;
}

@Parameters
public static class SubCommand2 {
    @Parameter(names = "--sub-opt2")
    public boolean opt;
}

@Parameters
public static class SubCommand3 {
    @Parameter(names = "--sub-opt3")
    public boolean opt;
}
}

  public class CommonArgs{
    @Parameter(names="--common-opt")
    public boolean isCommonOpt;
  }

  @Parameters(description = "my command 1")
  public class MyCommand1 extends CommonArgs{}

  @Parameters(description = "my command 2")
  public class MyCommand2 extends CommonArgs{}

  public class CommonArgs{
    @Parameter(names="--common-opt")
    public boolean isCommonOpt;
  }

  @Parameters(description = "my command 1")
  public class MyCommand1{
    @ParametersDelegate
    public CommonArgs commonArgs = new CommonArgs();
  }

  @Parameters(description = "my command 2")
  public class MyCommand2{
    @ParametersDelegate
    public CommonArgs commonArgs = new CommonArgs();
  }

CommandLine commandLine = new CommandLine(new MainCommand())
        .addSubcommand("cmd1", new ChildCommand1()) // 1st level
        .addSubcommand("cmd2", new ChildCommand2())
        .addSubcommand("cmd3", new CommandLine(new ChildCommand3()) // 2nd level
                .addSubcommand("cmd3sub1", new GrandChild3Command1())
                .addSubcommand("cmd3sub2", new GrandChild3Command2())
                .addSubcommand("cmd3sub3", new CommandLine(new GrandChild3Command3()) // 3rd
                        .addSubcommand("cmd3sub3sub1", new GreatGrandChild3Command3_1())
                        .addSubcommand("cmd3sub3sub2", new GreatGrandChild3Command3_2())
                                // etc
                )
        );