// Every webMethods Integration Server service has exactly one input
// argument: the pipeline.
//
// The pipeline is like a java.util.Map object that gets passed to each
// service that gets called.  (It's actually a com.wm.data.IData object,
// which unfortunately doesn't implement java.util.Map.)
//
// Because objects are passed by reference, every service called can alter
// the keys and values in the pipeline.
//
// This is an example of how the webMethods Integration Server pipeline
// would work if it was implemented in Java using java.util.Map objects.
//
// $ javac Pipeline.java
// $ java Pipeline

import java.util.*;

public class Pipeline {
  public static void greet(Map<String, Object> pipeline) {
    // convert the name input argument to uppercase: this litters the
    // pipeline with "instring" and "outstring" variables
    pipeline.put("instring", pipeline.get("name"));
    upcase(pipeline);
    pipeline.put("name", pipeline.get("outstring"));

    // get honorific for the gender: this litters the pipeline with the
    // variable "honorific"
    honorific(pipeline);

    // add greeting variable to pipeline: this is an output argument for the method
    pipeline.put("greeting", "Hello " + pipeline.get("honorific") + " " + pipeline.get("name"));
  }

  public static void upcase(Map<String, Object> pipeline) {
    String instring = (String)pipeline.get("instring");
    String outstring = instring.toUpperCase();
    pipeline.put("outstring", outstring);
  }

  public static void honorific(Map<String, Object> pipeline) {
    String gender = (String)pipeline.get("gender");
    String honorific = "";

    if (gender.equals("male")) {
      honorific = "Mr";
    } else if (gender.equals("female")) {
      honorific = "Ms";
    }

    pipeline.put("honorific", honorific);
  }

  public static void main(String[] args) {
    // create a new pipeline, and populate it with some variables
    Map<String, Object> pipeline = new HashMap<String, Object>();
    pipeline.put("name", "John Doe");
    pipeline.put("gender", "male");
    pipeline.put("email", "john.doe@example.com");
    pipeline.put("address", "123 Sycamore Street");

    // call greet service, passing the pipeline
    // greet then calls upcase and honorific, both of which
    // litter the pipeline with their arguments
    greet(pipeline);

    System.out.println("greeting = " + pipeline.get("greeting"));
    System.out.println("pipeline = " + pipeline);
  }
}