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/* Listing1014.java */
//------------------------------------------------------------------
//Abstrakte Produkte
//------------------------------------------------------------------
abstract class Product1
{
}
abstract class Product2
{
}
//------------------------------------------------------------------
//Abstrakte Factory
//------------------------------------------------------------------
abstract class ProductFactory
{
public abstract Product1 createProduct1();
public abstract Product2 createProduct2();
public static ProductFactory getFactory(String variant)
{
ProductFactory ret = null;
if (variant.equals("A")) {
ret = new ConcreteFactoryVariantA();
} else if (variant.equals("B")) {
ret = new ConcreteFactoryVariantB();
}
return ret;
}
public static ProductFactory getDefaultFactory()
{
return getFactory("A");
}
}
//------------------------------------------------------------------
//Konkrete Produkte f�r Implementierungsvariante A
//------------------------------------------------------------------
class Product1VariantA
extends Product1
{
}
class Product2VariantA
extends Product2
{
}
//------------------------------------------------------------------
//Konkrete Factory f�r Implementierungsvariante A
//------------------------------------------------------------------
class ConcreteFactoryVariantA
extends ProductFactory
{
public Product1 createProduct1()
{
return new Product1VariantA();
}
public Product2 createProduct2()
{
return new Product2VariantA();
}
}
//------------------------------------------------------------------
//Konkrete Produkte f�r Implementierungsvariante B
//------------------------------------------------------------------
class Product1VariantB
extends Product1
{
}
class Product2VariantB
extends Product2
{
}
//------------------------------------------------------------------
//Konkrete Factory f�r Implementierungsvariante B
//------------------------------------------------------------------
class ConcreteFactoryVariantB
extends ProductFactory
{
public Product1 createProduct1()
{
return new Product1VariantB();
}
public Product2 createProduct2()
{
return new Product2VariantB();
}
}
//------------------------------------------------------------------
//Beispielanwendung
//------------------------------------------------------------------
public class Listing1014
{
public static void main(String[] args)
{
ProductFactory fact = ProductFactory.getDefaultFactory();
Product1 prod1 = fact.createProduct1();
Product2 prod2 = fact.createProduct2();
}
}
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