Builder Design Pattern

Builder Design Pattern:

IBuilder.java

public interface IBuilder {

      public void buildPreface();

      public void buildReportTitle();

      public void buildHeader();

      public void buildContent();

      public void buildFooter();

      public Report getReport();

}

Mybuilder.java

public class MyBuilder implements IBuilder{

     

      private Report report;

     

      public MyBuilder(){

            report = new Report();

      }

     

      @Override

      public Report getReport(){   

            return report;

      }

      @Override

      public void buildContent() {

            report.setContent("my 1st report............");

      }

      @Override

      public void buildFooter() {

            report.setFooter("copyright softwareArchitecture&DesignWithArun.com : 2014");

      }

      @Override

      public void buildHeader() {

            report.setHeader(new String[]{"header_1", "header_2"});

      }

      @Override

      public void buildPreface() {

            report.setPreface("Report using Builder by : "+System.getProperty("user.info"));

      }

      @Override

      public void buildReportTitle() {

            report.setReportTitle("My Report");

      }

}

ReportDirector.java

public class ReportDirector {

      private IBuilder myBuilder;

     

      public ReportDirector(){

            myBuilder = new MyBuilder();

      }

      public void buildReport(){

            // report building logic/steps

            myBuilder.buildReportTitle();

            myBuilder.buildHeader();

            myBuilder.buildPreface();

            myBuilder.buildContent();

            myBuilder.buildFooter();

      }

     

      public Report getReport(){

            return this.myBuilder.getReport();

      }

}

Report.java

public class Report {

     

      private String reportTitle;

      private String header[];

      private String preface;

      private String content;

      private String footer;

     

      public String getReportTitle() {

            return reportTitle;

      }

      public void setReportTitle(String reportTitle) {

            this.reportTitle = reportTitle;

      }

      public String[] getHeader() {

            return header;

      }

      public void setHeader(String[] header) {

            this.header = header;

      }

      public String getPreface() {

            return preface;

      }

      public void setPreface(String preface) {

            this.preface = preface;

      }

      public String getContent() {

            return content;

      }

      public void setContent(String content) {

            this.content = content;

      }

      public String getFooter() {

            return footer;

      }

      public void setFooter(String footer) {

            this.footer = footer;

      }

}

Client.java

public class Client {

      public static void main(String[] args) {

            ReportDirector reportDirector = new ReportDirector();

            reportDirector.buildReport();

            Report report = reportDirector.getReport();

           

            //use report object as per business

            System.out.println(report.getContent());

      }

}