Syed Sayem blog

Template pattern

Template pattern example

public interface Spread {}
public abstract class SandwichMaker<S extends Spread> {
public void make(S spread) {
toastBread();
addSpread(spread);
enjoy();
}

protected void toastBread() {
System.out.println("...toasting bread");
}

protected abstract void addSpread(S spread);

protected void enjoy() {
System.out.println("this is yummy!");
}
}
public class CheeseSandwichMaker extends SandwichMaker<Cheese> {
@Override
protected void addSpread(Cheese cheese) {
System.out.println("... adding " + cheese.name + " cheese from " + cheese.origin);
}
}
public class Cheese implements Spread {
public final String name;
public final String origin;

public Cheese(String name, String origin) {
this.name = name;
this.origin = origin;
}
}
public class Demo {

public static void main(String[] argv) {
SandwichMaker<Cheese> sandwich = new CheeseSandwichMaker();
sandwich.make(new Cheese("Camembert", "Normandy, France"));
sandwich.make(new Cheese("Cheddar", "Somerset, England"));
}
}
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