与通用方法的接口

Question

我有一堆不同的处理器，每个处理器都有自己的 ProcessorRequest 和 ProcessorResponse classes.

public class Processor1 {
    ProcessorResponse1 process(ProcessorRequest1 request) {
        // do something
    }
}


public class Processor2 {
    ProcessorResponse2 process(ProcessorRequest2 request) {
        // do something
    }
}

public class Processor3 {
    ProcessorResponse3 process(ProcessorRequest3 request) {
        // do something
    }
}

所有 ProcessorRequest class 扩展 BaseRequest class，所有 ProcessorResponse class 扩展 BaseResponse class.

现在，我要求让所有 Processor class 实现一个公共接口 BaseProcessor，这样如果可能的话不要触及现有代码：

public interface BaseProcessor {

    public RRR process(TTT request) throws Exception;

}

其中RRR和TTT对应ProcessorResponse和ProcessorRequest.

我试着用泛型来做。

public interface Baserocessor<T extends BaseRequest, R extends BaseResponse> {

    public R process(T request) throws Exception;

}

但在这种情况下，我需要更改每个处理方法的签名并将 BaseRequest 转换为 ProcessorRequest:

public class Processor1 {
    BaseResponse process(BaserRequest baseRequest) {
        ProcessorRequest1 request = (ProcessorRequest1) baseRequest;
        // do something
    }
}

是否有另一种方法可以在不改变每个处理器的情况下做到这一点？

Answer 1

您的处理器类应按如下方式实现通用接口：

public class Processor1 implements BaseProcessor<ProcessorRequest1, ProcessorResponse1> {
    ProcessorResponse1 process(ProcessorRequest1 request) {
        // do something
    }
}

与通用方法的接口

Interface with Generic method

java

generics

public