private boolean isRequired(RequestParam annotation) {
System.out.println("required: " + annotation.value());
String defaultValue = annotation.defaultValue();
boolean missingDefaultValue =
ValueConstants.DEFAULT_NONE.equals(defaultValue) || isNullOrEmpty(defaultValue);
return annotation.required() && missingDefaultValue;
}
private void buildUrlParameters(
ExecutableElement executableElement, RestDocumentation.Resource.Method doc) {
RestDocumentation.Resource.Method.UrlFields subs = doc.getUrlParameters();
for (VariableElement var : executableElement.getParameters()) {
RequestParam reqParam = var.getAnnotation(RequestParam.class);
if (reqParam != null) {
addUrlField(subs, var, reqParam.value());
}
}
}
/**
* Is this action input parameter required.
*
* @return true if required
*/
public boolean isRequired() {
boolean ret;
if (isRequestBody()) {
ret = requestBody.required();
} else if (isRequestParam()) {
ret = !(isDefined(requestParam.defaultValue()) || !requestParam.required());
} else if (isRequestHeader()) {
ret = !(isDefined(requestHeader.defaultValue()) || !requestHeader.required());
} else {
ret = true;
}
return ret;
}
/**
* Determines default value of request param or request header, if available.
*
* @return value or null
*/
public String getDefaultValue() {
String ret;
if (isRequestParam()) {
ret = isDefined(requestParam.defaultValue()) ? requestParam.defaultValue() : null;
} else if (isRequestHeader()) {
ret =
!(ValueConstants.DEFAULT_NONE.equals(requestHeader.defaultValue()))
? requestHeader.defaultValue()
: null;
} else {
ret = null;
}
return ret;
}
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;
}