private Boolean getAnnotatedRequired(MethodParameter methodParameter) {
System.out.println("*** methodParameter: " + methodParameter.getParameterName());
Set<Boolean> requiredSet = new HashSet<Boolean>();
Annotation[] methodAnnotations = methodParameter.getParameterAnnotations();
// when the type is Optional, the required property of @RequestParam/@RequestHeader doesn't
// matter,
// since the value is always a non-null Optional after conversion
boolean optional = isOptional(methodParameter);
for (Annotation annotation : methodAnnotations) {
if (annotation instanceof RequestParam) {
requiredSet.add(!optional && isRequired((RequestParam) annotation));
} else if (annotation instanceof RequestHeader) {
requiredSet.add(!optional && ((RequestHeader) annotation).required());
} else if (annotation instanceof PathVariable) {
requiredSet.add(true);
} else if (annotation instanceof RequestBody) {
requiredSet.add(!optional && ((RequestBody) annotation).required());
} else if (annotation instanceof RequestPart) {
requiredSet.add(!optional && ((RequestPart) annotation).required());
} else if (annotation instanceof NotNull) {
System.out.println("*** FOUND NOTNULL ANNOTATION");
requiredSet.add(true);
}
}
System.out.println("required: " + requiredSet.contains(true));
return requiredSet.contains(true);
}
/**
* Validate the model attribute if applicable.
*
* <p>The default implementation checks for {@code @javax.validation.Valid}.
*
* @param binder the DataBinder to be used
* @param parameter the method parameter
*/
protected void validateIfApplicable(WebDataBinder binder, MethodParameter parameter) {
Annotation[] annotations = parameter.getParameterAnnotations();
for (Annotation annot : annotations) {
if (annot.annotationType().getSimpleName().startsWith("Valid")) {
Object hints = AnnotationUtils.getValue(annot);
binder.validate(hints instanceof Object[] ? (Object[]) hints : new Object[] {hints});
}
}
}
private boolean validateParameter(MethodParameter parameter) {
Annotation[] annotations = parameter.getParameterAnnotations();
for (Annotation annot : annotations) {
if (annot.annotationType().getSimpleName().startsWith("Valid")) {
return true;
}
}
return false;
}
/**
* Whether to validate the given @{@link RequestBody} method argument. The default implementation
* checks if the parameter is also annotated with {@code @Valid}.
*
* @param parameter the method argument for which to check if validation is needed
* @param argumentValue the method argument value (instantiated with a message converter)
* @return {@code true} if validation should be invoked, {@code false} otherwise.
*/
protected boolean shouldValidate(MethodParameter parameter, Object argumentValue) {
Annotation[] annotations = parameter.getParameterAnnotations();
for (Annotation annot : annotations) {
if ("Valid".equals(annot.annotationType().getSimpleName())) {
return true;
}
}
return false;
}
/**
* Validate the model attribute if applicable.
*
* <p>The default implementation checks for {@code @javax.validation.Valid}.
*
* @param binder the DataBinder to be used
* @param parameter the method parameter
*/
protected void validateIfApplicable(WebDataBinder binder, MethodParameter parameter) {
Annotation[] annotations = parameter.getParameterAnnotations();
for (Annotation ann : annotations) {
Validated validatedAnn = AnnotationUtils.getAnnotation(ann, Validated.class);
if (validatedAnn != null || ann.annotationType().getSimpleName().startsWith("Valid")) {
Object hints =
(validatedAnn != null ? validatedAnn.value() : AnnotationUtils.getValue(ann));
Object[] validationHints =
(hints instanceof Object[] ? (Object[]) hints : new Object[] {hints});
binder.validate(validationHints);
break;
}
}
}
/**
* Obtains the specified {@link Annotation} on the specified {@link MethodParameter}.
*
* @param annotationClass the class of the {@link Annotation} to find on the {@link
* MethodParameter}
* @param parameter the {@link MethodParameter} to search for an {@link Annotation}
* @return the {@link Annotation} that was found or null.
*/
private <T extends Annotation> T findMethodAnnotation(
Class<T> annotationClass, MethodParameter parameter) {
T annotation = parameter.getParameterAnnotation(annotationClass);
if (annotation != null) {
return annotation;
}
Annotation[] annotationsToSearch = parameter.getParameterAnnotations();
for (Annotation toSearch : annotationsToSearch) {
annotation = AnnotationUtils.findAnnotation(toSearch.annotationType(), annotationClass);
if (annotation != null) {
return annotation;
}
}
return null;
}
private void validate(WebDataBinder binder, MethodParameter parameter)
throws MethodArgumentNotValidException {
Annotation[] annotations = parameter.getParameterAnnotations();
for (Annotation annot : annotations) {
if (annot.annotationType().getSimpleName().startsWith("Valid")) {
Object hints = AnnotationUtils.getValue(annot);
binder.validate(hints instanceof Object[] ? (Object[]) hints : new Object[] {hints});
BindingResult bindingResult = binder.getBindingResult();
if (bindingResult.hasErrors()) {
if (isBindingErrorFatal(parameter)) {
throw new MethodArgumentNotValidException(parameter, bindingResult);
}
}
}
}
}
private String asString(HandlerMethod handlerMethod) {
StringBuilder sb = new StringBuilder();
sb.append("\nController:\n").append(handlerMethod.getBeanType().getSimpleName());
sb.append("\nMethod:\n");
sb.append(handlerMethod.getMethod().getReturnType().getSimpleName()).append(" ");
sb.append(handlerMethod.getMethod().getName()).append("(");
for (MethodParameter param : handlerMethod.getMethodParameters()) {
param.initParameterNameDiscovery(this.parameterNameDiscoverer);
for (Annotation annotation : param.getParameterAnnotations()) {
sb.append(annotation).append(" ");
}
sb.append(param.getParameterType().getSimpleName()).append(" ");
sb.append(param.getParameterName());
if (param.getParameterIndex() < handlerMethod.getMethodParameters().length - 1) {
sb.append(" ");
}
}
sb.append(")\n");
return sb.toString();
}
private Type determineInferredType() {
if (this.method == null) {
return null;
}
Type genericParameterType = null;
for (int i = 0; i < this.method.getParameterCount(); i++) {
MethodParameter methodParameter = new MethodParameter(this.method, i);
/*
* We're looking for a single non-annotated parameter, or one annotated with @Payload.
* We ignore parameters with type Message because they are not involved with conversion.
*/
if (isEligibleParameter(methodParameter)
&& (methodParameter.getParameterAnnotations().length == 0
|| methodParameter.hasParameterAnnotation(Payload.class))) {
if (genericParameterType == null) {
genericParameterType = methodParameter.getGenericParameterType();
if (genericParameterType instanceof ParameterizedType) {
ParameterizedType parameterizedType = (ParameterizedType) genericParameterType;
if (parameterizedType.getRawType().equals(Message.class)) {
genericParameterType =
((ParameterizedType) genericParameterType).getActualTypeArguments()[0];
}
}
} else {
if (MessagingMessageListenerAdapter.this.logger.isDebugEnabled()) {
MessagingMessageListenerAdapter.this.logger.debug(
"Ambiguous parameters for target payload for method "
+ this.method
+ "; no inferred type header added");
}
return null;
}
}
}
return genericParameterType;
}
private Object[] resolveInitBinderArguments(
Object handler, Method initBinderMethod, WebDataBinder binder, NativeWebRequest webRequest)
throws Exception {
Class[] initBinderParams = initBinderMethod.getParameterTypes();
Object[] initBinderArgs = new Object[initBinderParams.length];
for (int i = 0; i < initBinderArgs.length; i++) {
MethodParameter methodParam = new MethodParameter(initBinderMethod, i);
methodParam.initParameterNameDiscovery(this.parameterNameDiscoverer);
GenericTypeResolver.resolveParameterType(methodParam, handler.getClass());
String paramName = null;
boolean paramRequired = false;
String paramDefaultValue = null;
String pathVarName = null;
Annotation[] paramAnns = methodParam.getParameterAnnotations();
for (Annotation paramAnn : paramAnns) {
if (RequestParam.class.isInstance(paramAnn)) {
RequestParam requestParam = (RequestParam) paramAnn;
paramName = requestParam.value();
paramRequired = requestParam.required();
paramDefaultValue = requestParam.defaultValue();
break;
} else if (ModelAttribute.class.isInstance(paramAnn)) {
throw new IllegalStateException(
"@ModelAttribute is not supported on @InitBinder methods: " + initBinderMethod);
} else if (PathVariable.class.isInstance(paramAnn)) {
PathVariable pathVar = (PathVariable) paramAnn;
pathVarName = pathVar.value();
}
}
if (paramName == null && pathVarName == null) {
Object argValue = resolveCommonArgument(methodParam, webRequest);
if (argValue != WebArgumentResolver.UNRESOLVED) {
initBinderArgs[i] = argValue;
} else {
Class paramType = initBinderParams[i];
if (paramType.isInstance(binder)) {
initBinderArgs[i] = binder;
} else if (BeanUtils.isSimpleProperty(paramType)) {
paramName = "";
} else {
throw new IllegalStateException(
"Unsupported argument ["
+ paramType.getName()
+ "] for @InitBinder method: "
+ initBinderMethod);
}
}
}
if (paramName != null) {
initBinderArgs[i] =
resolveRequestParam(
paramName, paramRequired, paramDefaultValue, methodParam, webRequest, null);
} else if (pathVarName != null) {
initBinderArgs[i] = resolvePathVariable(pathVarName, methodParam, webRequest, null);
}
}
return initBinderArgs;
}
@SuppressWarnings("unchecked")
private Object[] resolveHandlerArguments(
Method handlerMethod,
Object handler,
NativeWebRequest webRequest,
ExtendedModelMap implicitModel)
throws Exception {
Class[] paramTypes = handlerMethod.getParameterTypes();
Object[] args = new Object[paramTypes.length];
for (int i = 0; i < args.length; i++) {
MethodParameter methodParam = new MethodParameter(handlerMethod, i);
methodParam.initParameterNameDiscovery(this.parameterNameDiscoverer);
GenericTypeResolver.resolveParameterType(methodParam, handler.getClass());
String paramName = null;
String headerName = null;
boolean requestBodyFound = false;
String cookieName = null;
String pathVarName = null;
String attrName = null;
boolean required = false;
String defaultValue = null;
boolean validate = false;
int found = 0;
Annotation[] paramAnns = methodParam.getParameterAnnotations();
for (Annotation paramAnn : paramAnns) {
if (RequestParam.class.isInstance(paramAnn)) {
RequestParam requestParam = (RequestParam) paramAnn;
paramName = requestParam.value();
required = requestParam.required();
defaultValue = requestParam.defaultValue();
found++;
} else if (RequestHeader.class.isInstance(paramAnn)) {
RequestHeader requestHeader = (RequestHeader) paramAnn;
headerName = requestHeader.value();
required = requestHeader.required();
defaultValue = requestHeader.defaultValue();
found++;
} else if (RequestBody.class.isInstance(paramAnn)) {
requestBodyFound = true;
found++;
} else if (CookieValue.class.isInstance(paramAnn)) {
CookieValue cookieValue = (CookieValue) paramAnn;
cookieName = cookieValue.value();
required = cookieValue.required();
defaultValue = cookieValue.defaultValue();
found++;
} else if (PathVariable.class.isInstance(paramAnn)) {
PathVariable pathVar = (PathVariable) paramAnn;
pathVarName = pathVar.value();
found++;
} else if (ModelAttribute.class.isInstance(paramAnn)) {
ModelAttribute attr = (ModelAttribute) paramAnn;
attrName = attr.value();
found++;
} else if (Value.class.isInstance(paramAnn)) {
defaultValue = ((Value) paramAnn).value();
} else if ("Valid".equals(paramAnn.annotationType().getSimpleName())) {
validate = true;
}
}
if (found > 1) {
throw new IllegalStateException(
"Handler parameter annotations are exclusive choices - "
+ "do not specify more than one such annotation on the same parameter: "
+ handlerMethod);
}
if (found == 0) {
Object argValue = resolveCommonArgument(methodParam, webRequest);
if (argValue != WebArgumentResolver.UNRESOLVED) {
args[i] = argValue;
} else if (defaultValue != null) {
args[i] = resolveDefaultValue(defaultValue);
} else {
Class paramType = methodParam.getParameterType();
if (Model.class.isAssignableFrom(paramType) || Map.class.isAssignableFrom(paramType)) {
args[i] = implicitModel;
} else if (SessionStatus.class.isAssignableFrom(paramType)) {
args[i] = this.sessionStatus;
} else if (Errors.class.isAssignableFrom(paramType)) {
throw new IllegalStateException(
"Errors/BindingResult argument declared "
+ "without preceding model attribute. Check your handler method signature!");
} else if (BeanUtils.isSimpleProperty(paramType)) {
paramName = "";
} else {
attrName = "";
}
}
}
if (paramName != null) {
args[i] =
resolveRequestParam(
paramName, required, defaultValue, methodParam, webRequest, handler);
} else if (headerName != null) {
args[i] =
resolveRequestHeader(
headerName, required, defaultValue, methodParam, webRequest, handler);
} else if (requestBodyFound) {
args[i] = resolveRequestBody(methodParam, webRequest, handler);
} else if (cookieName != null) {
args[i] =
resolveCookieValue(
cookieName, required, defaultValue, methodParam, webRequest, handler);
} else if (pathVarName != null) {
args[i] = resolvePathVariable(pathVarName, methodParam, webRequest, handler);
} else if (attrName != null) {
WebDataBinder binder =
resolveModelAttribute(attrName, methodParam, implicitModel, webRequest, handler);
boolean assignBindingResult =
(args.length > i + 1 && Errors.class.isAssignableFrom(paramTypes[i + 1]));
if (binder.getTarget() != null) {
doBind(binder, webRequest, validate, !assignBindingResult);
}
args[i] = binder.getTarget();
if (assignBindingResult) {
args[i + 1] = binder.getBindingResult();
i++;
}
implicitModel.putAll(binder.getBindingResult().getModel());
}
}
return args;
}
/**
* 得到参数列表
*
* @param method
* @param model
* @param request
* @param response
* @param c
* @return
*/
@SuppressWarnings("unchecked")
public static Object[] getArgs(
Method method,
Map<String, Object> model,
HttpServletRequest request,
HttpServletResponse response,
Class<?> c) {
Class<?>[] paramTypes = method.getParameterTypes();
Object[] args = new Object[paramTypes.length];
Map<String, Object> argMap = new HashMap<String, Object>(args.length);
Map<String, String> pathValues = null;
PathPattern pathPattern = method.getAnnotation(PathPattern.class);
if (pathPattern != null) {
String path = request.getRequestURI();
int index = path.lastIndexOf('.');
if (index != -1) {
path = path.substring(0, index);
String[] patterns = pathPattern.patterns();
pathValues = getPathValues(patterns, path);
}
}
MapBindingResult errors = new MapBindingResult(argMap, "");
ParameterNameDiscoverer parameterNameDiscoverer =
new LocalVariableTableParameterNameDiscoverer();
for (int i = 0; i < paramTypes.length; i++) {
Class<?> paramType = paramTypes[i];
MethodParameter methodParam = new MethodParameter(method, i);
methodParam.initParameterNameDiscovery(parameterNameDiscoverer);
GenericTypeResolver.resolveParameterType(methodParam, c.getClass());
String paramName = methodParam.getParameterName();
// map
if (Map.class.isAssignableFrom(paramType)) {
args[i] = model;
}
// HttpServletRequest
else if (HttpServletRequest.class.isAssignableFrom(paramType)) {
args[i] = request;
}
// HttpServletResponse
else if (HttpServletResponse.class.isAssignableFrom(paramType)) {
args[i] = response;
}
// HttpSession
else if (HttpSession.class.isAssignableFrom(paramType)) {
args[i] = request.getSession();
}
// Errors
else if (Errors.class.isAssignableFrom(paramType)) {
args[i] = errors;
}
// MultipartFile
else if (MultipartFile.class.isAssignableFrom(paramType)) {
MultipartFile[] files = resolveMultipartFiles(request, errors, paramName);
if (files != null && files.length > 0) {
args[i] = files[0];
}
}
// MultipartFile[]
else if (MultipartFile[].class.isAssignableFrom(paramType)) {
args[i] = resolveMultipartFiles(request, errors, paramName);
} else {
// 简单数据类型
if (BeanUtils.isSimpleProperty(paramType)) {
SimpleTypeConverter converter = new SimpleTypeConverter();
Object value;
// 是否是数组
if (paramType.isArray()) {
value = request.getParameterValues(paramName);
} else {
Object[] parameterAnnotations = methodParam.getParameterAnnotations();
value = null;
if (parameterAnnotations != null && parameterAnnotations.length > 0) {
if (pathValues != null && pathValues.size() > 0) {
for (Object object : parameterAnnotations) {
if (PathVariable.class.isInstance(object)) {
PathVariable pv = (PathVariable) object;
if (StringUtils.isEmpty(pv.value())) {
value = pathValues.get(paramName);
} else {
value = pathValues.get(pv.value());
}
break;
}
}
}
} else {
value = request.getParameter(paramName);
}
}
try {
args[i] = converter.convertIfNecessary(value, paramType, methodParam);
model.put(paramName, args[i]);
} catch (TypeMismatchException e) {
errors.addError(new FieldError(paramName, paramName, e.getMessage()));
}
} else {
// 复杂数据类型POJO类
if (paramType.isArray()) {
ObjectArrayDataBinder binder =
new ObjectArrayDataBinder(paramType.getComponentType(), paramName);
args[i] = binder.bind(request);
model.put(paramName, args[i]);
} else {
Object bindObject = BeanUtils.instantiateClass(paramType);
SummerServletRequestDataBinder binder =
new SummerServletRequestDataBinder(bindObject, paramName);
binder.bind(request);
BindException be = new BindException(binder.getBindingResult());
List<FieldError> fieldErrors = be.getFieldErrors();
for (FieldError fieldError : fieldErrors) {
errors.addError(fieldError);
}
args[i] = binder.getTarget();
model.put(paramName, args[i]);
}
}
}
}
return args;
}