Mega Code Archive
Builder pattern
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import java.util.LinkedList;
import java.util.List;
public class BuilderDemo {
public static void main(String[] args) {
HouseBuilder builder = new SimpleHouseBuilder();
HouseBuildingCompany houseBuildingCompany = new HouseBuildingCompany();
House house = houseBuildingCompany.build(builder);
System.out.println(house);
}
}
interface HouseBuilder {
void buildBasement();
void buildWalls();
void buildRoof();
House getHouse();
}
class HouseBuildingCompany {
public House build(HouseBuilder builder) {
builder.buildBasement();
builder.buildWalls();
builder.buildRoof();
return builder.getHouse();
}
}
class SimpleHouseBuilder implements HouseBuilder {
private House house;
public SimpleHouseBuilder() {
this.house = new House();
}
public void buildBasement() {
this.house.setBasement(new Basement());
}
public void buildWalls() {
for (int i = 0; i < 4; i++)
this.house.addWall(new Wall());
}
public void buildRoof() {
this.house.setRoot(new Roof());
}
public House getHouse() {
return this.house;
}
}
class Basement {
@Override
public String toString() {
return "Basement";
}
}
class Wall {
@Override
public String toString() {
return "Wall";
}
}
class Roof {
@Override
public String toString() {
return "Roof";
}
}
class House {
private Basement basement;
private List<Wall> walls;
private Roof roof;
public House() {
this.walls = new LinkedList<Wall>();
}
public void addWall(Wall wall) {
this.walls.add(wall);
}
public void setRoot(Roof roof) {
this.roof = roof;
}
public void setBasement(Basement basement) {
this.basement = basement;
}
@Override
public String toString() {
return "House {" + this.basement + ", " + this.walls + ", " + this.roof + "}";
}
}
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