Mega Code Archive
Example of the Builder pattern
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import java.util.ArrayList;
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;
class Office extends ArrayList<OfficeUnit> {
}
class Word extends Office {
}
class PPT extends Office {
}
class Excel extends Office {
}
class OfficeUnit {
private String s;
public OfficeUnit(String s) {
this.s = s;
}
public String toString() {
return s;
}
}
class DocumentPage extends OfficeUnit {
public DocumentPage(String s) {
super(s);
}
}
class PPTSlide extends OfficeUnit {
public PPTSlide(String s) {
super(s);
}
}
class ExcelWorkbook extends OfficeUnit {
public ExcelWorkbook(String s) {
super(s);
}
}
class OfficeBuilder {
public void buildBase() {
}
public void addOfficeUnit(OfficeUnit item) {
}
public Office getFinishedMedia() {
return null;
}
}
class WordBuilder extends OfficeBuilder {
private Word b;
public void buildBase() {
System.out.println("Building word framework");
b = new Word();
}
public void addOfficeUnit(OfficeUnit chapter) {
System.out.println("Adding word page " + chapter);
b.add(chapter);
}
public Office getFinishedMedia() {
return b;
}
}
class PPTBuilder extends OfficeBuilder {
private PPT m;
public void buildBase() {
System.out.println("Building PPT");
m = new PPT();
}
public void addOfficeUnit(OfficeUnit article) {
System.out.println("Adding slide" + article);
m.add(article);
}
public Office getFinishedMedia() {
return m;
}
}
class ExcelBuilder extends OfficeBuilder {
private Excel w;
public void buildBase() {
System.out.println("Building Excel");
w = new Excel();
}
public void addOfficeUnit(OfficeUnit webItem) {
System.out.println("Adding workbook" + webItem);
w.add(webItem);
}
public Office getFinishedMedia() {
return w;
}
}
class OfficeDirector {
private OfficeBuilder mb;
public OfficeDirector(OfficeBuilder mb) {
this.mb = mb;
}
public Office produceMedia(List input) {
mb.buildBase();
for (Iterator it = input.iterator(); it.hasNext();)
mb.addOfficeUnit((OfficeUnit) it.next());
return mb.getFinishedMedia();
}
};
public class BuildOfficeDemo {
public static void main(String[] args) {
List input = Arrays.asList(new OfficeUnit[] { new OfficeUnit("item1"), new OfficeUnit("item2"),
new OfficeUnit("item3"), new OfficeUnit("item4"), });
OfficeDirector buildBook = new OfficeDirector(new WordBuilder());
Office word = buildBook.produceMedia(input);
String result = "word: " + word;
System.out.println(result);
OfficeDirector buildMagazine = new OfficeDirector(new PPTBuilder());
Office ppt = buildMagazine.produceMedia(input);
result = "PPT: " + ppt;
System.out.println(result);
OfficeDirector buildWebSite = new OfficeDirector(new ExcelBuilder());
Office excel = buildWebSite.produceMedia(input);
result = "Excel: " + excel;
System.out.println(result);
}
}
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