DecoratorPatternExample

package ru.ezhov.groovy.decorator;

public class App {
    public static void main(String[] args) {
        Decorator1 decorator = new DecoratorLog1(
                new DecoratorHttp1(
                        new DecoratorSimple1()
                )
        );
        decorator.print();
    }
}

interface Decorator1 {
    void print();
}

class DecoratorHttp1 implements Decorator1 {

    private Decorator1 decorator;

    public DecoratorHttp1(Decorator1 decorator) {
        this.decorator = decorator;
    }

    @Override
    public void print() {
        System.out.println("Print to http");
        decorator.print();
    }
}

class DecoratorLog1 implements Decorator1 {

    private Decorator1 decorator;

    public DecoratorLog1(Decorator1 decorator) {
        this.decorator = decorator;
    }

    @Override
    public void print() {
        System.out.println("Hello I'm start logging action");
        decorator.print();
        System.out.println("I'm stop logging action");
    }
}

class DecoratorSimple1 implements Decorator1 {
    @Override
    public void print() {
        System.out.println("From simple decorator");
    }
}