java - 在 GWT 异步回调中，如何在 onSuccess 中处理相同的返回类型？

Question

如果我的服务中有两个 boolean 方法，如何确保 onSuccess 方法处理返回 boolean 的正确方法>?

例如，在 onSuccess 方法中我说:

if (result instanceof Boolean) {};

有没有办法可以区分返回 boolean 值的服务方法？否则，无法保证正确的代码将在我的 onSuccess 方法中执行，就好像结果是一个 boolean 值，如果调用我的两个 boolean 值服务方法中的任何一个，它将执行。

这是我面临的问题的示例:

private class DefaultCallback implements AsyncCallback
        {
        @Override
        public void onFailure(Throwable caught)
            {
            mainGUI.getServerResponseLabel().setStyleName("serverResponseLabelError");
            mainGUI.getServerResponseLabel().setHTML("An error occurred while "
                    + "attempting to contact the server. Please check your network " + "connection and try again.");
            }

        @Override
        public void onSuccess(Object result)
            {
            if (result instanceof Boolean)
                { 
                //
                I have two methods that return a boolean here, 
                so this block will execute no matter which one is called;
                for one method I want to display a GUI windows saying "Upload complete",          
                and for another, create an excel spreadsheet. But the boolean value of one method won't be relevant to the other

Answer 1

有很多灰色地带，但请耐心等待:在 SomethingRPCService.java 中

boolean isA();
boolean isB();

在 SomethingRPCServiceAsync.java

void isA(AsyncCallback<Boolean> callback);
void isB(AsyncCallback<Boolean> callback);

在您的 Activity 中

somethingService.isA(new AsyncCallback<Boolean>() {
        @Override
        public void onSuccessImpl(final Boolean response) {
            //will be executed on success of THIS call
        }
        @Override
        public void onFailure(final Throwable caught) {
            // not relevant here
        }
});

somethingService.isB(new AsyncCallback<Boolean>() {
        @Override
        public void onSuccessImpl(final Boolean response) {
            //will be executed on success of THIS call
        }
        @Override
        public void onFailure(final Throwable caught) {
            // not relevant here
        }
});

您可以(必须？)实际输入您的返回单

编辑:有了你的例子，我可以看得更好一点；您的回调不应该相同，您应该覆盖它，以便代码不一样，因为它不一样