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| Builder Design pattern - Implementation [Animal Toy] |
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| Builder Design pattern - Implementation [Animal Toy] - Class Diagram |
AnimalToy.java
public class AnimalToy
{
private String animalToyName;
private String animalToyHead;
private String animalToyBody;
private String animalToyArms;
private String animalToyLegs;
private String animalToyTail;
public String getAnimalToyName()
{
return animalToyName;
}
public void setAnimalToyName( String animalToyName )
{
this.animalToyName = animalToyName;
}
public String getAnimalToyHead()
{
return animalToyHead;
}
public void setAnimalToyHead( String animalToyHead )
{
this.animalToyHead = animalToyHead;
}
public String getAnimalToyBody()
{
return animalToyBody;
}
public void setAnimalToyBody( String animalToyBody )
{
this.animalToyBody = animalToyBody;
}
public String getAnimalToyArms()
{
return animalToyArms;
}
public void setAnimalToyArms( String animalToyArms )
{
this.animalToyArms = animalToyArms;
}
public String getAnimalToyLegs()
{
return animalToyLegs;
}
public void setAnimalToyLegs( String animalToyLegs )
{
this.animalToyLegs = animalToyLegs;
}
public String getAnimalToyTail()
{
return animalToyTail;
}
public void setAnimalToyTail( String animalToyTail )
{
this.animalToyTail = animalToyTail;
}
@Override
public String toString()
{
return "AnimalToy [animalToyName=" + animalToyName + ", animalToyHead=" + animalToyHead
+ ", animalToyBody=" + animalToyBody + ", animalToyArms=" + animalToyArms
+ ", animalToyLegs=" + animalToyLegs + ", animalToyTail=" + animalToyTail + "]\n";
}
}
AnimalToyBuilder.java
public abstract class AnimalToyBuilder
{
private AnimalToy animalToy;
public AnimalToy getAnimalToy()
{
return animalToy;
}
public void setAnimalToy( AnimalToy animalToy )
{
this.animalToy = animalToy;
}
public final AnimalToy buildAnimalToy()
{
AnimalToy animalToy = createAnimalToy();
setAnimalToy(animalToy);
buildAnimalHead();
buildAnimalBody();
buildAnimalLegs();
buildAnimalArms();
buildAnimalTail();
setAnimalToyName();
return animalToy;
}
public abstract void buildAnimalHead();
public abstract void buildAnimalBody();
public abstract void buildAnimalLegs();
public abstract void buildAnimalArms();
public abstract void buildAnimalTail();
public abstract void setAnimalToyName();
public abstract AnimalToy createAnimalToy();
}
DogToyBuilder.java
public class DogToyBuilder extends AnimalToyBuilder
{
public AnimalToy createAnimalToy()
{
return new AnimalToy();
}
public void buildAnimalHead()
{
getAnimalToy().setAnimalToyHead("Dog head");
System.out.println("Step 1 : Dog Head has been built");
}
public void buildAnimalBody()
{
getAnimalToy().setAnimalToyBody("Dog Body");
System.out.println("Step 2 : Dog Body has been built");
}
public void buildAnimalLegs()
{
getAnimalToy().setAnimalToyLegs("Dog 4 legs");
System.out.println("Step 3 : Dog Legs has been built");
}
public void buildAnimalArms()
{
// No implementation because dog doesn't have Arms
getAnimalToy().setAnimalToyLegs("No arms");
System.out.println("Step 4 : is skiped because dog doesn't have Arms");
}
public void setAnimalToyName()
{
getAnimalToy().setAnimalToyName("Dog");
}
public void buildAnimalTail()
{
getAnimalToy().setAnimalToyTail("Dog Tail");
System.out.println("Step 5 : Dog Tail has been built");
}
}
LionToyBuilder.java
public class LionToyBuilder extends AnimalToyBuilder
{
public AnimalToy createAnimalToy()
{
return new AnimalToy();
}
public void buildAnimalHead()
{
getAnimalToy().setAnimalToyHead("Lion head");
System.out.println("Step 1 : Lion Head has been built");
}
public void buildAnimalBody()
{
getAnimalToy().setAnimalToyBody("Lion Body");
System.out.println("Step 2 : Lion Body has been built");
}
public void buildAnimalLegs()
{
getAnimalToy().setAnimalToyLegs("Lion 4 legs");
System.out.println("Step 3 : Lion Legs has been built");
}
public void buildAnimalArms()
{
// No implementation because Lion doesn't have Arms
getAnimalToy().setAnimalToyLegs("No arms");
System.out.println("Step 4 : is skiped because Lion doesn't have Arms");
}
public void setAnimalToyName()
{
getAnimalToy().setAnimalToyName("Lion");
}
public void buildAnimalTail()
{
getAnimalToy().setAnimalToyTail("Lion Tail");
System.out.println("Step 5 : Lion Tail has been built");
}
}
MonkeyToyBuilder.java
public class MonkeyToyBuilder extends AnimalToyBuilder
{
public AnimalToy createAnimalToy()
{
return new AnimalToy();
}
public void buildAnimalHead()
{
getAnimalToy().setAnimalToyHead("Monkey head");
System.out.println("Step 1 : Monkey Head has been built");
}
public void buildAnimalBody()
{
getAnimalToy().setAnimalToyBody("Monkey Body");
System.out.println("Step 2 : Monkey Body has been built");
}
public void buildAnimalLegs()
{
getAnimalToy().setAnimalToyLegs("Monkey 2 legs");
System.out.println("Step 3 : Monkey Legs has been built");
}
public void buildAnimalArms()
{
getAnimalToy().setAnimalToyArms("Monkey 2 Arms");
System.out.println("Step 4 : Monkey Arms has been built");
}
public void setAnimalToyName()
{
getAnimalToy().setAnimalToyName("Monkey");
}
public void buildAnimalTail()
{
getAnimalToy().setAnimalToyTail("Monkey Tail");
System.out.println("Step 5 : Monkey Tail has been built");
}
}
ToyMaker.java
public class ToyMaker
{
public final static String LION_TOY = "Lion";
public final static String DOG_TOY = "Dog";
public final static String MONKEY_TOY = "Monkey";
public static AnimalToy makeToy( String toyType ) throws Exception
{
AnimalToyBuilder animalToyBuilder = null;
if( toyType.equalsIgnoreCase(LION_TOY) )
{
animalToyBuilder = new LionToyBuilder();
}
else if( toyType.equalsIgnoreCase(DOG_TOY) )
{
animalToyBuilder = new DogToyBuilder();
}
else if( toyType.equalsIgnoreCase(MONKEY_TOY) )
{
animalToyBuilder = new MonkeyToyBuilder();
}
else
{
System.out.println("Sorry we cann't make : " + toyType);
throw new Exception("Sorry we cann't make : " + toyType);
}
return animalToyBuilder.buildAnimalToy();
}
}
BuilderClient.java
public class BuilderClient
{
public static void main( String[] args ) throws Exception
{
AnimalToy lionToy = ToyMaker.makeToy(ToyMaker.LION_TOY);
System.out.println(lionToy);
AnimalToy dogToy = ToyMaker.makeToy(ToyMaker.DOG_TOY);
System.out.println(dogToy);
AnimalToy monkeyToy = ToyMaker.makeToy(ToyMaker.MONKEY_TOY);
System.out.println(monkeyToy);
}
}
Output
Step 1 : Lion Head has been built
Step 2 : Lion Body has been built
Step 3 : Lion Legs has been built
Step 4 : is skiped because Lion doesn't have Arms
Step 5 : Lion Tail has been built
AnimalToy [animalToyName=Lion, animalToyHead=Lion head, animalToyBody=Lion Body, animalToyArms=null, animalToyLegs=No arms, animalToyTail=Lion Tail]
Step 1 : Dog Head has been built
Step 2 : Dog Body has been built
Step 3 : Dog Legs has been built
Step 4 : is skiped because dog doesn't have Arms
Step 5 : Dog Tail has been built
AnimalToy [animalToyName=Dog, animalToyHead=Dog head, animalToyBody=Dog Body, animalToyArms=null, animalToyLegs=No arms, animalToyTail=Dog Tail]
Step 1 : Monkey Head has been built
Step 2 : Monkey Body has been built
Step 3 : Monkey Legs has been built
Step 4 : Monkey Arms has been built
Step 5 : Monkey Tail has been built
AnimalToy [animalToyName=Monkey, animalToyHead=Monkey head, animalToyBody=Monkey Body, animalToyArms=Monkey 2 Arms, animalToyLegs=Monkey 2 legs, animalToyTail=Monkey Tail]
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