Java 类org.springframework.web.bind.support.DefaultDataBinderFactory 实例源码

@Test
@SuppressWarnings("rawtypes")
public void resolveOptional() throws Exception {
    ConfigurableWebBindingInitializer initializer = new ConfigurableWebBindingInitializer();
    initializer.setConversionService(new DefaultConversionService());
    WebDataBinderFactory binderFactory = new DefaultDataBinderFactory(initializer);

    Object result = resolver.resolveArgument(paramOptional, null, webRequest, binderFactory);
    assertEquals(Optional.class, result.getClass());
    assertEquals(Optional.empty(), result);

    this.request.addParameter("name", "123");
    result = resolver.resolveArgument(paramOptional, null, webRequest, binderFactory);
    assertEquals(Optional.class, result.getClass());
    assertEquals(123, ((Optional) result).get());
}

@Override
@SuppressWarnings("unchecked")
public <T> T provide(Method method, int parameterIndex) {
    MethodParameter methodParameter = new MethodParameter(method, parameterIndex);
    ModelAndViewContainer modelAndViewContainer = new ModelAndViewContainer();
    NativeWebRequest webRequest = new ServletWebRequest(request);
    DefaultDataBinderFactory binderFactory = new DefaultDataBinderFactory(new ConfigurableWebBindingInitializer());

    try {
        return (T) argumentResolvers.resolveArgument(methodParameter, modelAndViewContainer, webRequest, binderFactory);
    } catch (Exception e) {
        throw new IllegalStateException(e);
    }
}

private InvocableHandlerMethod createInitBinderMethod(Object bean, Method method) {
    InvocableHandlerMethod binderMethod = new InvocableHandlerMethod(bean, method);
    binderMethod.setHandlerMethodArgumentResolvers(this.initBinderArgumentResolvers);
    binderMethod.setDataBinderFactory(new DefaultDataBinderFactory(this.webBindingInitializer));
    binderMethod.setParameterNameDiscoverer(this.parameterNameDiscoverer);
    return binderMethod;
}

private void runTest(Object controller) throws Exception {
    HandlerMethodArgumentResolverComposite resolvers = new HandlerMethodArgumentResolverComposite();
    resolvers.addResolver(new ModelAttributeMethodProcessor(false));
    resolvers.addResolver(new ModelMethodProcessor());
    WebDataBinderFactory dataBinderFactory = new DefaultDataBinderFactory(null);

    Class<?> type = controller.getClass();
    Set<Method> methods = MethodIntrospector.selectMethods(type, METHOD_FILTER);
    List<InvocableHandlerMethod> modelMethods = new ArrayList<InvocableHandlerMethod>();
    for (Method method : methods) {
        InvocableHandlerMethod modelMethod = new InvocableHandlerMethod(controller, method);
        modelMethod.setHandlerMethodArgumentResolvers(resolvers);
        modelMethod.setDataBinderFactory(dataBinderFactory);
        modelMethods.add(modelMethod);
    }
    Collections.shuffle(modelMethods);

    SessionAttributesHandler sessionHandler = new SessionAttributesHandler(type, this.sessionAttributeStore);
    ModelFactory factory = new ModelFactory(modelMethods, dataBinderFactory, sessionHandler);
    factory.initModel(this.webRequest, this.mavContainer, new HandlerMethod(controller, "handle"));
    if (logger.isDebugEnabled()) {
        StringBuilder sb = new StringBuilder();
        for (String name : getInvokedMethods()) {
            sb.append(" >> ").append(name);
        }
        logger.debug(sb);
    }
}

private WebDataBinderFactory createBinderFactory(String methodName, Class<?>... parameterTypes)
        throws Exception {

    Object handler = new InitBinderHandler();
    Method method = handler.getClass().getMethod(methodName, parameterTypes);

    InvocableHandlerMethod handlerMethod = new InvocableHandlerMethod(handler, method);
    handlerMethod.setHandlerMethodArgumentResolvers(argumentResolvers);
    handlerMethod.setDataBinderFactory(new DefaultDataBinderFactory(null));
    handlerMethod.setParameterNameDiscoverer(new LocalVariableTableParameterNameDiscoverer());

    return new InitBinderDataBinderFactory(Arrays.asList(handlerMethod), bindingInitializer);
}

@Override
@SuppressWarnings("unchecked")
public <T> T provide(Method method, int parameterIndex) {
    MethodParameter methodParameter = new MethodParameter(method, parameterIndex);
    ModelAndViewContainer modelAndViewContainer = new ModelAndViewContainer();
    NativeWebRequest webRequest = new ServletWebRequest(request);
    DefaultDataBinderFactory binderFactory = new DefaultDataBinderFactory(new ConfigurableWebBindingInitializer());

    try {
        return (T) argumentResolvers.resolveArgument(methodParameter, modelAndViewContainer, webRequest, binderFactory);
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
}

private InvocableHandlerMethod createInitBinderMethod(Object bean, Method method) {
    InvocableHandlerMethod binderMethod = new InvocableHandlerMethod(bean, method);
    binderMethod.setHandlerMethodArgumentResolvers(this.initBinderArgumentResolvers);
    binderMethod.setDataBinderFactory(new DefaultDataBinderFactory(this.webBindingInitializer));
    binderMethod.setParameterNameDiscoverer(this.parameterNameDiscoverer);
    return binderMethod;
}

private WebDataBinderFactory createBinderFactory(String methodName, Class<?>... parameterTypes)
        throws Exception {

    Object handler = new InitBinderHandler();
    Method method = handler.getClass().getMethod(methodName, parameterTypes);

    InvocableHandlerMethod handlerMethod = new InvocableHandlerMethod(handler, method);
    handlerMethod.setHandlerMethodArgumentResolvers(argumentResolvers);
    handlerMethod.setDataBinderFactory(new DefaultDataBinderFactory(null));
    handlerMethod.setParameterNameDiscoverer(new LocalVariableTableParameterNameDiscoverer());

    return new InitBinderDataBinderFactory(Arrays.asList(handlerMethod), bindingInitializer);
}

@Before
public void setUp() throws Exception {

    MockServletContext sc = new MockServletContext();
    request = new MockHttpServletRequest(sc);
    webRequest = new ServletWebRequest(request);
    RequestContextHolder.setRequestAttributes(webRequest);
    request.setAttribute(DispatcherServlet.OUTPUT_FLASH_MAP_ATTRIBUTE, new FlashMap());
    factory = new DefaultDataBinderFactory(new ConfigurableWebBindingInitializer());
}