import HelloApp.*;
import org.omg.CosNaming.*;
import org.omg.CosNaming.NamingContextPackage.*;
import org.omg.CORBA.*;
import java.io.*;

/**
 *  a simple client using dynamic invocation
 *
 *@author     donsez
 *@created    16 juin 2003
 *@link http://developer.netscape.com/docs/manuals/enterprise/javapg/dii.htm
 */
public class DIIHelloClient {


	/**
	 *  The main() Method
	 *
	 *@param  args  command arguments
	 */
	public static void main(String args[]) {

		if (args.length < 2) {
			usage();
			return;
		}

		try {
			// Set or load the ORB properties
			java.util.Properties props = null;
			// Properties props = new Properties();
			// props.put("org.omg.CORBA.ORBInitialPort", "1050");
			// props.put("org.omg.CORBA.ORBInitialHost", "MyHost");

			// create and initialize the ORB
			ORB orb = ORB.init(args, props);

			org.omg.CORBA.Object objRef;

			if (args[0].equals("-name")) {
				String bindingname = args[1];

				// get the root naming context
				org.omg.CORBA.Object ncobjRef =
						orb.resolve_initial_references("NameService");
				// Use NamingContextExt instead of NamingContext. This is
				// part of the Interoperable naming Service.
				NamingContextExt ncRef = NamingContextExtHelper.narrow(ncobjRef);

				// resolve the Object Reference in Naming
				objRef = ncRef.resolve_str(bindingname);

			} else if (args[0].equals("-iorfile")) {
				String iorfilename = args[1];

				FileInputStream fis = new FileInputStream(iorfilename);
				java.io.DataInputStream dis = new java.io.DataInputStream(fis);
				String ior = dis.readLine();
				dis.close();
				objRef = orb.string_to_object(ior);

			} else if (args[0].equals("-ior")) {
				String ior = args[1];
				objRef = orb.string_to_object(ior);

			} else {
				usage();
				return;
			}

			// Dynamic Invocation for result=hello.sayHello(param)
			String param = "World";
			Request sayHelloReq = objRef._request("sayHello");
			sayHelloReq.add_in_arg().insert_string(param);
			sayHelloReq.set_return_type(orb.get_primitive_tc(TCKind.tk_string));
			sayHelloReq.invoke();
			String result = sayHelloReq.result().value().extract_string();
			System.out.println(result);

			// Dynamic Invocation for hello.shutdown();
			Request shutdownReq = objRef._request("shutdown");
			shutdownReq.invoke();

		} catch (Exception e) {
			System.out.println("ERROR : " + e);
			e.printStackTrace(System.out);
		}
	}

	/**
	 *  Print usage of this application
	 */
	static void usage() {
		System.err.println("Usage: HelloClient -name <bindingname> <orboptions>");
		System.err.println("Usage: HelloClient -ior <iorstring> <orboptions>");
		System.err.println("Usage: HelloClient -iorfile <iorfilename> <orboptions>");
	}
}