下面列出了org.springframework.core.Conventions#getVariableNameForParameter ( ) 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。
private Object getErrors(MethodParameter parameter, BindingContext context) {
Assert.isTrue(parameter.getParameterIndex() > 0,
"Errors argument must be declared immediately after a model attribute argument");
int index = parameter.getParameterIndex() - 1;
MethodParameter attributeParam = MethodParameter.forExecutable(parameter.getExecutable(), index);
ReactiveAdapter adapter = getAdapterRegistry().getAdapter(attributeParam.getParameterType());
Assert.state(adapter == null, "An @ModelAttribute and an Errors/BindingResult argument " +
"cannot both be declared with an async type wrapper. " +
"Either declare the @ModelAttribute without an async wrapper type or " +
"handle a WebExchangeBindException error signal through the async type.");
ModelAttribute ann = parameter.getParameterAnnotation(ModelAttribute.class);
String name = (ann != null && StringUtils.hasText(ann.value()) ?
ann.value() : Conventions.getVariableNameForParameter(attributeParam));
Object errors = context.getModel().asMap().get(BindingResult.MODEL_KEY_PREFIX + name);
Assert.state(errors != null, () -> "An Errors/BindingResult argument is expected " +
"immediately after the @ModelAttribute argument to which it applies. " +
"For @RequestBody and @RequestPart arguments, please declare them with a reactive " +
"type wrapper and use its onError operators to handle WebExchangeBindException: " +
parameter.getMethod());
return errors;
}
/**
* Throws MethodArgumentNotValidException if validation fails.
* @throws HttpMessageNotReadableException if {@link RequestBody#required()}
* is {@code true} and there is no body content or if there is no suitable
* converter to read the content with.
*/
@Override
public Object resolveArgument(MethodParameter parameter, @Nullable ModelAndViewContainer mavContainer,
NativeWebRequest webRequest, @Nullable WebDataBinderFactory binderFactory) throws Exception {
parameter = parameter.nestedIfOptional();
Object arg = readWithMessageConverters(webRequest, parameter, parameter.getNestedGenericParameterType());
String name = Conventions.getVariableNameForParameter(parameter);
if (binderFactory != null) {
WebDataBinder binder = binderFactory.createBinder(webRequest, arg, name);
if (arg != null) {
validateIfApplicable(binder, parameter);
if (binder.getBindingResult().hasErrors() && isBindExceptionRequired(binder, parameter)) {
throw new MethodArgumentNotValidException(parameter, binder.getBindingResult());
}
}
if (mavContainer != null) {
mavContainer.addAttribute(BindingResult.MODEL_KEY_PREFIX + name, binder.getBindingResult());
}
}
return adaptArgumentIfNecessary(arg, parameter);
}
private Object getErrors(MethodParameter parameter, BindingContext context) {
Assert.isTrue(parameter.getParameterIndex() > 0,
"Errors argument must be declared immediately after a model attribute argument");
int index = parameter.getParameterIndex() - 1;
MethodParameter attributeParam = MethodParameter.forExecutable(parameter.getExecutable(), index);
ReactiveAdapter adapter = getAdapterRegistry().getAdapter(attributeParam.getParameterType());
Assert.state(adapter == null, "An @ModelAttribute and an Errors/BindingResult argument " +
"cannot both be declared with an async type wrapper. " +
"Either declare the @ModelAttribute without an async wrapper type or " +
"handle a WebExchangeBindException error signal through the async type.");
ModelAttribute ann = parameter.getParameterAnnotation(ModelAttribute.class);
String name = (ann != null && StringUtils.hasText(ann.value()) ?
ann.value() : Conventions.getVariableNameForParameter(attributeParam));
Object errors = context.getModel().asMap().get(BindingResult.MODEL_KEY_PREFIX + name);
Assert.state(errors != null, () -> "An Errors/BindingResult argument is expected " +
"immediately after the @ModelAttribute argument to which it applies. " +
"For @RequestBody and @RequestPart arguments, please declare them with a reactive " +
"type wrapper and use its onError operators to handle WebExchangeBindException: " +
parameter.getMethod());
return errors;
}
/**
* Throws MethodArgumentNotValidException if validation fails.
* @throws HttpMessageNotReadableException if {@link RequestBody#required()}
* is {@code true} and there is no body content or if there is no suitable
* converter to read the content with.
*/
@Override
public Object resolveArgument(MethodParameter parameter, @Nullable ModelAndViewContainer mavContainer,
NativeWebRequest webRequest, @Nullable WebDataBinderFactory binderFactory) throws Exception {
parameter = parameter.nestedIfOptional();
Object arg = readWithMessageConverters(webRequest, parameter, parameter.getNestedGenericParameterType());
String name = Conventions.getVariableNameForParameter(parameter);
if (binderFactory != null) {
WebDataBinder binder = binderFactory.createBinder(webRequest, arg, name);
if (arg != null) {
validateIfApplicable(binder, parameter);
if (binder.getBindingResult().hasErrors() && isBindExceptionRequired(binder, parameter)) {
throw new MethodArgumentNotValidException(parameter, binder.getBindingResult());
}
}
if (mavContainer != null) {
mavContainer.addAttribute(BindingResult.MODEL_KEY_PREFIX + name, binder.getBindingResult());
}
}
return adaptArgumentIfNecessary(arg, parameter);
}
/**
* Throws MethodArgumentNotValidException if validation fails.
* @throws HttpMessageNotReadableException if {@link RequestBody#required()}
* is {@code true} and there is no body content or if there is no suitable
* converter to read the content with.
*/
@Override
public Object resolveArgument(MethodParameter parameter, ModelAndViewContainer mavContainer,
NativeWebRequest webRequest, WebDataBinderFactory binderFactory) throws Exception {
parameter = parameter.nestedIfOptional();
Object arg = readWithMessageConverters(webRequest, parameter, parameter.getNestedGenericParameterType());
String name = Conventions.getVariableNameForParameter(parameter);
WebDataBinder binder = binderFactory.createBinder(webRequest, arg, name);
if (arg != null) {
validateIfApplicable(binder, parameter);
if (binder.getBindingResult().hasErrors() && isBindExceptionRequired(binder, parameter)) {
throw new MethodArgumentNotValidException(parameter, binder.getBindingResult());
}
}
mavContainer.addAttribute(BindingResult.MODEL_KEY_PREFIX + name, binder.getBindingResult());
return adaptArgumentIfNecessary(arg, parameter);
}
private WebDataBinder resolveModelAttribute(String attrName, MethodParameter methodParam,
ExtendedModelMap implicitModel, NativeWebRequest webRequest, Object handler) throws Exception {
// Bind request parameter onto object...
String name = attrName;
if ("".equals(name)) {
name = Conventions.getVariableNameForParameter(methodParam);
}
Class<?> paramType = methodParam.getParameterType();
Object bindObject;
if (implicitModel.containsKey(name)) {
bindObject = implicitModel.get(name);
}
else if (this.methodResolver.isSessionAttribute(name, paramType)) {
bindObject = this.sessionAttributeStore.retrieveAttribute(webRequest, name);
if (bindObject == null) {
raiseSessionRequiredException("Session attribute '" + name + "' required - not found in session");
}
}
else {
bindObject = BeanUtils.instantiateClass(paramType);
}
WebDataBinder binder = createBinder(webRequest, bindObject, name);
initBinder(handler, name, binder, webRequest);
return binder;
}
/**
* Throws MethodArgumentNotValidException if validation fails.
* @throws HttpMessageNotReadableException if {@link RequestBody#required()}
* is {@code true} and there is no body content or if there is no suitable
* converter to read the content with.
*/
@Override
public Object resolveArgument(MethodParameter parameter, ModelAndViewContainer mavContainer,
NativeWebRequest webRequest, WebDataBinderFactory binderFactory) throws Exception {
Object arg = readWithMessageConverters(webRequest, parameter, parameter.getGenericParameterType());
String name = Conventions.getVariableNameForParameter(parameter);
WebDataBinder binder = binderFactory.createBinder(webRequest, arg, name);
if (arg != null) {
validateIfApplicable(binder, parameter);
if (binder.getBindingResult().hasErrors() && isBindExceptionRequired(binder, parameter)) {
throw new MethodArgumentNotValidException(parameter, binder.getBindingResult());
}
}
mavContainer.addAttribute(BindingResult.MODEL_KEY_PREFIX + name, binder.getBindingResult());
return arg;
}
private WebDataBinder resolveModelAttribute(String attrName, MethodParameter methodParam,
ExtendedModelMap implicitModel, NativeWebRequest webRequest, Object handler) throws Exception {
// Bind request parameter onto object...
String name = attrName;
if ("".equals(name)) {
name = Conventions.getVariableNameForParameter(methodParam);
}
Class<?> paramType = methodParam.getParameterType();
Object bindObject;
if (implicitModel.containsKey(name)) {
bindObject = implicitModel.get(name);
}
else if (this.methodResolver.isSessionAttribute(name, paramType)) {
bindObject = this.sessionAttributeStore.retrieveAttribute(webRequest, name);
if (bindObject == null) {
raiseSessionRequiredException("Session attribute '" + name + "' required - not found in session");
}
}
else {
bindObject = BeanUtils.instantiateClass(paramType);
}
WebDataBinder binder = createBinder(webRequest, bindObject, name);
initBinder(handler, name, binder, webRequest);
return binder;
}
@Nullable
private Consumer<Object> getValidator(Message<?> message, MethodParameter parameter) {
if (this.validator == null) {
return null;
}
for (Annotation ann : parameter.getParameterAnnotations()) {
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});
String name = Conventions.getVariableNameForParameter(parameter);
return target -> {
BeanPropertyBindingResult bindingResult = new BeanPropertyBindingResult(target, name);
if (!ObjectUtils.isEmpty(validationHints) && this.validator instanceof SmartValidator) {
((SmartValidator) this.validator).validate(target, bindingResult, validationHints);
}
else {
this.validator.validate(target, bindingResult);
}
if (bindingResult.hasErrors()) {
throw new MethodArgumentNotValidException(message, parameter, bindingResult);
}
};
}
}
return null;
}
private void validate(Object target, Object[] validationHints, MethodParameter param,
BindingContext binding, ServerWebExchange exchange) {
String name = Conventions.getVariableNameForParameter(param);
WebExchangeDataBinder binder = binding.createDataBinder(exchange, target, name);
binder.validate(validationHints);
if (binder.getBindingResult().hasErrors()) {
throw new WebExchangeBindException(param, binder.getBindingResult());
}
}
private void validate(Object target, Object[] validationHints, MethodParameter param,
BindingContext binding, ServerWebExchange exchange) {
String name = Conventions.getVariableNameForParameter(param);
WebExchangeDataBinder binder = binding.createDataBinder(exchange, target, name);
binder.validate(validationHints);
if (binder.getBindingResult().hasErrors()) {
throw new WebExchangeBindException(param, binder.getBindingResult());
}
}
/**
* Converts {@link TeapotMapping} to {@link Teapot} domain object. Apply
* binding on {@link Teapot}.
*/
@Override
public Object resolveArgument(MethodParameter parameter, ModelAndViewContainer mavContainer,
NativeWebRequest webRequest, WebDataBinderFactory binderFactory) throws Exception {
/* Read mapping from request */
TeapotMapping mapping = (TeapotMapping) readWithMessageConverters(
webRequest, parameter, TeapotMapping.class);
String name = Conventions.getVariableNameForParameter(parameter);
/* Convert mapping to domain object */
Teapot teapot = mapper.fromMapping(mapping);
WebDataBinder binder = binderFactory
.createBinder(webRequest, teapot, name);
if (teapot != null) {
validateIfApplicable(binder, parameter);
if (binder.getBindingResult().hasErrors() && isBindExceptionRequired(binder, parameter)) {
throw new MethodArgumentNotValidException(parameter, binder.getBindingResult());
}
}
mavContainer.addAttribute(BindingResult.MODEL_KEY_PREFIX + name, binder.getBindingResult());
return teapot;
}
/**
* Derive the model attribute name for the given method parameter based on
* a {@code @ModelAttribute} parameter annotation (if present) or falling
* back on parameter type based conventions.
* @param parameter a descriptor for the method parameter
* @return the derived name
* @see Conventions#getVariableNameForParameter(MethodParameter)
*/
public static String getNameForParameter(MethodParameter parameter) {
ModelAttribute ann = parameter.getParameterAnnotation(ModelAttribute.class);
String name = (ann != null ? ann.value() : null);
return (StringUtils.hasText(name) ? name : Conventions.getVariableNameForParameter(parameter));
}
/**
* Derive the model attribute name for the given method parameter based on
* a {@code @ModelAttribute} parameter annotation (if present) or falling
* back on parameter type based conventions.
* @param parameter a descriptor for the method parameter
* @return the derived name
* @see Conventions#getVariableNameForParameter(MethodParameter)
*/
public static String getNameForParameter(MethodParameter parameter) {
ModelAttribute ann = parameter.getParameterAnnotation(ModelAttribute.class);
String name = (ann != null ? ann.value() : null);
return (StringUtils.hasText(name) ? name : Conventions.getVariableNameForParameter(parameter));
}
/**
* Derive the model attribute name for the given method parameter based on
* a {@code @ModelAttribute} parameter annotation (if present) or falling
* back on parameter type based conventions.
* @param parameter a descriptor for the method parameter
* @return the derived name
* @see Conventions#getVariableNameForParameter(MethodParameter)
*/
public static String getNameForParameter(MethodParameter parameter) {
ModelAttribute ann = parameter.getParameterAnnotation(ModelAttribute.class);
String name = (ann != null ? ann.value() : null);
return (StringUtils.hasText(name) ? name : Conventions.getVariableNameForParameter(parameter));
}
/**
* Derive the model attribute name for the given method parameter based on
* a {@code @ModelAttribute} parameter annotation (if present) or falling
* back on parameter type based conventions.
* @param parameter a descriptor for the method parameter
* @return the derived name
* @see Conventions#getVariableNameForParameter(MethodParameter)
*/
public static String getNameForParameter(MethodParameter parameter) {
ModelAttribute ann = parameter.getParameterAnnotation(ModelAttribute.class);
String name = (ann != null ? ann.value() : null);
return (StringUtils.hasText(name) ? name : Conventions.getVariableNameForParameter(parameter));
}
/**
* Derive the model attribute name for a method parameter based on:
* <ol>
* <li>the parameter {@code @ModelAttribute} annotation value
* <li>the parameter type
* </ol>
* @param parameter a descriptor for the method parameter
* @return the derived name (never {@code null} or empty String)
*/
public static String getNameForParameter(MethodParameter parameter) {
ModelAttribute ann = parameter.getParameterAnnotation(ModelAttribute.class);
String name = (ann != null ? ann.value() : null);
return (StringUtils.hasText(name) ? name : Conventions.getVariableNameForParameter(parameter));
}
/**
* Derives the model attribute name for a method parameter based on:
* <ol>
* <li>The parameter {@code @ModelAttribute} annotation value
* <li>The parameter type
* </ol>
* @return the derived name; never {@code null} or an empty string
*/
public static String getNameForParameter(MethodParameter parameter) {
ModelAttribute annot = parameter.getParameterAnnotation(ModelAttribute.class);
String attrName = (annot != null) ? annot.value() : null;
return StringUtils.hasText(attrName) ? attrName : Conventions.getVariableNameForParameter(parameter);
}