通常为存储在数组中的装饰对象提供setter

假设我有一套 无关,生成 我想去上课 Decorate

public abstract class GeneratedDecorator<T> {
    private T generated;

    public T getGenerated() { return generated; }
    public void setGenerated(T generated) { this.generated = generated; }

    public abstract String getString();

    public static class ClassA extends GeneratedDecorator<GeneratedClassA> {
        @Override
        public String getString() { return getGenerated().getThisString(); }
    }

    public static class ClassB extends GeneratedDecorator<GeneratedClassB> {
        @Override
        public String getString() { return getGenerated().getADifferentString(); }
    }

}

现在,为了使用这个新的高级课程,我只想说:

GeneratedDecorator.ClassA a = new GeneratedDecorator.ClassA();
a.setGenerated(myGeneratedInstanceA);
a.getString();

到目前为止。。。但现在我想管理一系列这样的东西 Decorators .

public abstract class DecoratorBundle<T extends GeneratedDecorator> {
    private static final int MAX_ROWS = 10;

    private T[] bundle;

    DecoratorBundle() { bundle = createBundle(); }

    public String getString(int index) { return bundle[index].getString(); }

    public void setRow(??? generated, int index ) {
        //check index of bundle, if null create a new instance of appropriate type and set bundle[index] = new instance
        //call setGenerated on instance at index
    }

    protected abstract T[] createBundle();

    public static class ClassA extends DecoratorBundle<GeneratedDecorator.ClassA> {
        @Override
        protected GeneratedDecorator.ClassA[] createBundle() {
            return new GeneratedDecorator.ClassA[MAX_ROWS];
        }
    }

    public static class ClassB extends DecoratorBundle<GeneratedDecorator.ClassB> {
        @Override
        protected GeneratedDecorator.ClassB[] createBundle() {
            return new GeneratedDecorator.ClassB[MAX_ROWS];
        }
    }

}

我被困在这里。。。我想要这个 DecoratorBundle 拥有 setRow(??? generated, int index) 其中参数是 GeneratedDecorator GeneratedClassA 或 GeneratedClassB 装饰包 bundle 数组。它目前能够实例化数组,但是我想让它用某种方法来创建一个新的 发电机发电机 -在一个 setRow 方法。

如果我在这件事上完全错了,那么我很乐意听到另一个想法。