Shows basic usage of a command hierarchy in PicoCli

PicoCliQuickStart.java

import java.util.concurrent.Callable;

import picocli.CommandLine;
import picocli.CommandLine.Command;
import picocli.CommandLine.IVersionProvider;
import picocli.CommandLine.Model.CommandSpec;
import picocli.CommandLine.ParameterException;
import picocli.CommandLine.Spec;

public class PicoCliTest {
	
	public static class VersionProvider implements IVersionProvider {

		@Override
		public String[] getVersion() throws Exception {
			// TODO Auto-generated method stub
			return new String[] {"Bundle", "qualifier"};
		}
		
	}
	
	@Command(description="Description", synopsisSubcommandLabel = "COMMAND", name="name", mixinStandardHelpOptions = true, versionProvider = VersionProvider.class, subcommands = SubCommand.class)
	public static class RootCommand implements Callable<Object> {
		@Spec CommandSpec spec;
		
		@Override
		public Object call() throws Exception {
			throw new ParameterException(spec.commandLine(), "Missing required subcommand");
		}
		
	}
	
	@Command(description="sub Description", name="sub-name", mixinStandardHelpOptions = true, versionProvider = VersionProvider.class, subcommands = SubSubCommand.class)
	public static class SubCommand implements Callable<Object> {

		@Override
		public Object call() throws Exception {
			// TODO Auto-generated method stub
			return null;
		}
		
		@Command(description="sub method", name="do-that")
		public void doThat() {
			
		}
		
	}
	
	@Command(description="sub sub Description", name="sub-sub-name", mixinStandardHelpOptions = true, versionProvider = VersionProvider.class)
	public static class SubSubCommand implements Callable<Object> {

		@Override
		public Object call() throws Exception {
			// TODO Auto-generated method stub
			return null;
		}
		
	}
	
	
	public static void main(String[] args) {
		CommandLine commandLine = new CommandLine(new RootCommand());
		System.exit(commandLine.execute(args));
	}

}