/**
* Copyright (c) 2016, biezhi 王爵 (biezhi.me@gmail.com)
* <p>
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* <p>
* http://www.apache.org/licenses/LICENSE-2.0
* <p>
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.blade.mvc.view.resolve;
import com.blade.exception.RouteException;
import com.blade.kit.AsmKit;
import com.blade.kit.StringKit;
import com.blade.mvc.annotation.*;
import com.blade.mvc.http.Request;
import com.blade.mvc.http.Response;
import com.blade.mvc.http.wrapper.Session;
import com.blade.mvc.multipart.FileItem;
import com.blade.mvc.view.ModelAndView;
import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import java.util.Map;
public final class MethodArgument {
public static Object[] getArgs(Request request, Response response, Method actionMethod) throws Exception {
Class<?>[] parameters = actionMethod.getParameterTypes();
Annotation[][] annotations = actionMethod.getParameterAnnotations();
Object[] args = new Object[parameters.length];
actionMethod.setAccessible(true);
String[] paramaterNames = AsmKit.getMethodParamNames(actionMethod);
for (int i = 0, len = parameters.length; i < len; i++) {
Class<?> argType = parameters[i];
if (argType == Request.class) {
args[i] = request;
continue;
}
if (argType == Response.class) {
args[i] = response;
continue;
}
if (argType == Session.class) {
args[i] = request.session();
continue;
}
if (argType == ModelAndView.class) {
args[i] = new ModelAndView();
continue;
}
if (argType == Map.class) {
args[i] = request.querys();
continue;
}
Annotation annotation = annotations[i][0];
if (null != annotation) {
// query param
if (annotation.annotationType() == QueryParam.class) {
QueryParam queryParam = (QueryParam) annotation;
String paramName = queryParam.value();
String val = request.query(paramName);
boolean required = queryParam.required();
if (StringKit.isBlank(paramName)) {
assert paramaterNames != null;
paramName = paramaterNames[i];
val = request.query(paramName);
}
if (StringKit.isBlank(val)) {
val = queryParam.defaultValue();
}
if (required && StringKit.isBlank(val)) {
throw new RouteException("query param [" + paramName + "] not is empty.");
}
args[i] = getRequestParam(argType, val);
continue;
}
// path param
if (annotation.annotationType() == PathParam.class) {
PathParam pathParam = (PathParam) annotation;
String paramName = pathParam.value();
String val = request.pathParam(paramName);
if (StringKit.isBlank(paramName)) {
assert paramaterNames != null;
paramName = paramaterNames[i];
val = request.pathParam(paramName);
}
if (StringKit.isBlank(val)) {
val = pathParam.defaultValue();
}
args[i] = getRequestParam(argType, val);
}
// header param
if (annotation.annotationType() == HeaderParam.class) {
HeaderParam headerParam = (HeaderParam) annotation;
String paramName = headerParam.value();
String val = request.header(paramName);
boolean required = headerParam.required();
if (StringKit.isBlank(paramName)) {
assert paramaterNames != null;
paramName = paramaterNames[i];
val = request.header(paramName);
}
if (StringKit.isBlank(val)) {
val = headerParam.defaultValue();
}
if (required && StringKit.isBlank(val)) {
throw new RouteException("header param [" + paramName + "] not is empty.");
}
args[i] = getRequestParam(argType, val);
continue;
}
// cookie param
if (annotation.annotationType() == CookieParam.class) {
CookieParam cookieParam = (CookieParam) annotation;
String paramName = cookieParam.value();
String val = request.cookie(paramName);
boolean required = cookieParam.required();
if (StringKit.isBlank(paramName)) {
assert paramaterNames != null;
paramName = paramaterNames[i];
val = request.cookie(paramName);
}
if (StringKit.isBlank(val)) {
val = cookieParam.defaultValue();
}
if (required && StringKit.isBlank(val)) {
throw new RouteException("cookie param [" + paramName + "] not is empty.");
}
args[i] = getRequestParam(argType, val);
continue;
}
// form multipart
if (annotation.annotationType() == MultipartParam.class && argType == FileItem.class) {
MultipartParam multipartParam = (MultipartParam) annotation;
String paramName = multipartParam.value();
FileItem val = request.fileItem(paramName);
if (StringKit.isBlank(paramName)) {
assert paramaterNames != null;
paramName = paramaterNames[i];
val = request.fileItem(paramName);
}
args[i] = val;
continue;
}
}
}
return args;
}
public static Object getRequestParam(Class<?> parameterType, String val) {
Object result = null;
if (parameterType.equals(String.class)) {
return val;
}
if (StringKit.isBlank(val)) {
if (parameterType.equals(int.class) || parameterType.equals(double.class) ||
parameterType.equals(long.class) || parameterType.equals(byte.class) || parameterType.equals(float.class)) {
result = 0;
}
if (parameterType.equals(boolean.class)) {
result = false;
}
} else {
if (parameterType.equals(Integer.class) || parameterType.equals(int.class)) {
result = Integer.parseInt(val);
}
if (parameterType.equals(Long.class) || parameterType.equals(long.class)) {
result = Long.parseLong(val);
}
if (parameterType.equals(Double.class) || parameterType.equals(double.class)) {
result = Double.parseDouble(val);
}
if (parameterType.equals(Float.class) || parameterType.equals(float.class)) {
result = Float.parseFloat(val);
}
if (parameterType.equals(Boolean.class) || parameterType.equals(boolean.class)) {
result = Boolean.parseBoolean(val);
}
if (parameterType.equals(Byte.class) || parameterType.equals(byte.class)) {
result = Byte.parseByte(val);
}
}
return result;
}
}