Java Design Patterns Builder Patterns Example 1

import java.io.Serializable;

class Scheduler {
   public Appointment createAppointment(AppointmentBuilder builder, String description, String attendees) {
      if (builder == null) {
         builder = new AppointmentBuilder();
      }/*from w  ww.j  a  v  a2  s  .c o  m*/
      builder.buildAppointment();
      builder.buildDescription(description);
      builder.buildAttendees(attendees);
      return builder.getAppointment();
   }
}

class Appointment {
   private String description;
   private String attendees;

   public String getDescription() {
      return description;
   }

   public void setDescription(String newDescription) {
      description = newDescription;
   }

   public void setAttendees(String newAttendees) {
      attendees = newAttendees;
   }

   public String toString() {
      return "Description: " + description + "\n" + "Attendees: " + attendees;
   }
}

class AppointmentBuilder {

   protected Appointment appointment;

   protected int requiredElements;

   public void buildAppointment() {
      appointment = new Appointment();
   }

   public void buildDescription(String newDescription) {
      appointment.setDescription(newDescription);
   }

   public void buildAttendees(String attendees) {
      appointment.setAttendees(attendees);
   }

   public Appointment getAppointment() {
      return appointment;
   }

   public int getRequiredElements() {
      return requiredElements;
   }
}

interface Contact extends Serializable {
   public String getFirstName();

   public String getLastName();

   public String getTitle();

   public String getOrganization();

   public void setFirstName(String newFirstName);

   public void setLastName(String newLastName);

   public void setTitle(String newTitle);

   public void setOrganization(String newOrganization);
}

class ContactImpl implements Contact {
   private String firstName;
   private String lastName;
   private String title;
   private String organization;

   public ContactImpl(String newFirstName, String newLastName, String newTitle, String newOrganization) {
      firstName = newFirstName;
      lastName = newLastName;
      title = newTitle;
      organization = newOrganization;
   }

   public String getFirstName() {
      return firstName;
   }

   public String getLastName() {
      return lastName;
   }

   public String getTitle() {
      return title;
   }

   public String getOrganization() {
      return organization;
   }

   public void setFirstName(String newFirstName) {
      firstName = newFirstName;
   }

   public void setLastName(String newLastName) {
      lastName = newLastName;
   }

   public void setTitle(String newTitle) {
      title = newTitle;
   }

   public void setOrganization(String newOrganization) {
      organization = newOrganization;
   }

   public String toString() {
      return firstName + " " + lastName;
   }
}

class MeetingBuilder extends AppointmentBuilder {
   public Appointment getAppointment() {
      super.getAppointment();
      return appointment;
   }
}

public class Main {
   public static void main(String[] arguments) {
      Appointment appt = null;

      Scheduler pimScheduler = new Scheduler();

      AppointmentBuilder apptBuilder = new AppointmentBuilder();
      appt = pimScheduler.createAppointment(apptBuilder, "CSS Meetup", "A B C D");
      System.out.println(appt);

      MeetingBuilder mtgBuilder = new MeetingBuilder();
      appt = pimScheduler.createAppointment(mtgBuilder, "HTML Meetup", "D E F G");
      System.out.println(appt);
      
      appt = pimScheduler.createAppointment(mtgBuilder, "Java Meeting", "X Y Z");
      System.out.println(appt);
   }

}