我正在使用访问者模式来抽象远离Android中的UI代码的付款处理。我对应该传递给访问者构造函数的内容有一些疑问,以便在完成处理付款后查看回调。
让我告诉你到目前为止我有什么:
我正在处理2个支付系统,因此有两种支付策略(brainTree和Stripe):
public class BrainTreePaymentStrategy implements IVisitable {
@Override
public void makePayment() {
}
@Override
public void accept(Visitor v) {
}
}
public class StripePaymentStrategy implements IVisitable {
@Override
public void makePayment() {
}
@Override
public void accept(IVisitor v) {
}
}
public interface IVisitable {
void makePayment();
void accept(IVisitor v);
}
public interface IVisitor {
//list out all the classes the visitor can visit now
void visit(StripePaymentStrategy stripePaymentStrategy);
void visit(BrainTreePaymentStrategy brainTreePaymentStrategy);
}
//now critical, lets create a real concrete visitor that can actually do the work:
public class PaymentStrategyVistor implements IVisitor {
@Override
public void visit(StripePaymentStrategy stripePaymentStrategy) {
//process the braintree payment here, but how to give call back to UI ?
}
@Override
public void visit(BrainTreePaymentStrategy brainTreePaymentStrategy) {
//process the braintree payment here, but how to give call back to UI ?
}
}
我正在使用叔叔bob的干净的架构,所以我的网络调用是通过用例,我也使用mvp为我的表示层,所以如果需要我可以访问演示者和用例。
所以我的问题再次出现在PaymentStrategyVistor类中,如果我作为构造函数参数传入presenter,你会怎么想?例如,我可以调用presenter.doBrainTreePayment("someToken");
我可以在visitors visit(BrainTreePaymentStrategy brainTreePaymentStrategy)
方法中执行此操作。这是你们所有人都会这样做的吗?
答案 0 :(得分:1)
您的建议(将演示者传递给每位访问者的构造函数)似乎完全没问题。