List of usage examples for org.springframework.beans SimpleTypeConverter convertIfNecessary
@Override
@Nullable
public <T> T convertIfNecessary(@Nullable Object value, @Nullable Class<T> requiredType,
@Nullable MethodParameter methodParam) throws TypeMismatchException
From source file:com.fengduo.bee.commons.component.FormModelMethodArgumentResolver.java
/** * {@inheritDoc}// ww w . j a va 2s.co m * <p> * Downcast {@link org.springframework.web.bind.WebDataBinder} to * {@link org.springframework.web.bind.ServletRequestDataBinder} before binding. * * @throws Exception * @see org.springframework.web.servlet.mvc.method.annotation.ServletRequestDataBinderFactory */ protected void bindRequestParameters(ModelAndViewContainer mavContainer, WebDataBinderFactory binderFactory, WebDataBinder binder, NativeWebRequest request, MethodParameter parameter) throws Exception { // Map<String, Boolean> hasProcessedPrefixMap = new HashMap<String, Boolean>(); // // Class<?> targetType = binder.getTarget().getClass(); // WebDataBinder simpleBinder = binderFactory.createBinder(request, null, null); Collection target = (Collection) binder.getTarget(); Class<?>[] paramTypes = parameter.getMethod().getParameterTypes(); Method method = parameter.getMethod(); Object[] args = new Object[paramTypes.length]; Map<String, Object> argMap = new HashMap<String, Object>(args.length); 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); String paramName = methodParam.getParameterName(); // ?? if (BeanUtils.isSimpleProperty(paramType)) { SimpleTypeConverter converter = new SimpleTypeConverter(); Object value; // ? if (paramType.isArray()) { value = request.getParameterValues(paramName); } else { value = request.getParameter(paramName); } try { args[i] = converter.convertIfNecessary(value, paramType, methodParam); } catch (TypeMismatchException e) { errors.addError(new FieldError(paramName, paramName, e.getMessage())); } } else { // ???POJO if (paramType.isArray()) { ObjectArrayDataBinder binders = new ObjectArrayDataBinder(paramType.getComponentType(), paramName); target.addAll(ArrayUtils.arrayConvert(binders.bind(request))); } } } // if (Collection.class.isAssignableFrom(targetType)) {// bind collection or array // // Type type = parameter.getGenericParameterType(); // Class<?> componentType = Object.class; // // Collection target = (Collection) binder.getTarget(); // // List targetList = new ArrayList(target); // // if (type instanceof ParameterizedType) { // componentType = (Class<?>) ((ParameterizedType) type).getActualTypeArguments()[0]; // } // // if (parameter.getParameterType().isArray()) { // componentType = parameter.getParameterType().getComponentType(); // } // // for (Object key : servletRequest.getParameterMap().keySet()) { // String prefixName = getPrefixName((String) key); // // // ?prefix ?? // if (hasProcessedPrefixMap.containsKey(prefixName)) { // continue; // } else { // hasProcessedPrefixMap.put(prefixName, Boolean.TRUE); // } // // if (isSimpleComponent(prefixName)) { // bind simple type // Map<String, Object> paramValues = WebUtils.getParametersStartingWith(servletRequest, prefixName); // Matcher matcher = INDEX_PATTERN.matcher(prefixName); // if (!matcher.matches()) { // ? array=1&array=2 // for (Object value : paramValues.values()) { // targetList.add(simpleBinder.convertIfNecessary(value, componentType)); // } // } else { // ? array[0]=1&array[1]=2 // int index = Integer.valueOf(matcher.group(1)); // // if (targetList.size() <= index) { // growCollectionIfNecessary(targetList, index); // } // targetList.set(index, simpleBinder.convertIfNecessary(paramValues.values(), componentType)); // } // } else { // ? votes[1].title=votes[1].title&votes[0].title=votes[0].title&votes[0].id=0&votes[1].id=1 // Object component = null; // // ? ????? // Matcher matcher = INDEX_PATTERN.matcher(prefixName); // if (!matcher.matches()) { // throw new IllegalArgumentException("bind collection error, need integer index, key:" + key); // } // int index = Integer.valueOf(matcher.group(1)); // if (targetList.size() <= index) { // growCollectionIfNecessary(targetList, index); // } // Iterator iterator = targetList.iterator(); // for (int i = 0; i < index; i++) { // iterator.next(); // } // component = iterator.next(); // // if (component == null) { // component = BeanUtils.instantiate(componentType); // } // // WebDataBinder componentBinder = binderFactory.createBinder(request, component, null); // component = componentBinder.getTarget(); // // if (component != null) { // ServletRequestParameterPropertyValues pvs = new ServletRequestParameterPropertyValues( // servletRequest, // prefixName, // ""); // componentBinder.bind(pvs); // validateIfApplicable(componentBinder, parameter); // if (componentBinder.getBindingResult().hasErrors()) { // if (isBindExceptionRequired(componentBinder, parameter)) { // throw new BindException(componentBinder.getBindingResult()); // } // } // targetList.set(index, component); // } // } // target.clear(); // target.addAll(targetList); // } // } else if (MapWapper.class.isAssignableFrom(targetType)) { // // Type type = parameter.getGenericParameterType(); // Class<?> keyType = Object.class; // Class<?> valueType = Object.class; // // if (type instanceof ParameterizedType) { // keyType = (Class<?>) ((ParameterizedType) type).getActualTypeArguments()[0]; // valueType = (Class<?>) ((ParameterizedType) type).getActualTypeArguments()[1]; // } // // MapWapper mapWapper = ((MapWapper) binder.getTarget()); // Map target = mapWapper.getInnerMap(); // if (target == null) { // target = new HashMap(); // mapWapper.setInnerMap(target); // } // // for (Object key : servletRequest.getParameterMap().keySet()) { // String prefixName = getPrefixName((String) key); // // // ?prefix ?? // if (hasProcessedPrefixMap.containsKey(prefixName)) { // continue; // } else { // hasProcessedPrefixMap.put(prefixName, Boolean.TRUE); // } // // Object keyValue = simpleBinder.convertIfNecessary(getMapKey(prefixName), keyType); // // if (isSimpleComponent(prefixName)) { // bind simple type // Map<String, Object> paramValues = WebUtils.getParametersStartingWith(servletRequest, prefixName); // // for (Object value : paramValues.values()) { // target.put(keyValue, simpleBinder.convertIfNecessary(value, valueType)); // } // } else { // // Object component = target.get(keyValue); // if (component == null) { // component = BeanUtils.instantiate(valueType); // } // // WebDataBinder componentBinder = binderFactory.createBinder(request, component, null); // component = componentBinder.getTarget(); // // if (component != null) { // ServletRequestParameterPropertyValues pvs = new ServletRequestParameterPropertyValues( // servletRequest, // prefixName, // ""); // componentBinder.bind(pvs); // // validateComponent(componentBinder, parameter); // // target.put(keyValue, component); // } // } // } // } else {// bind model // ServletRequestDataBinder servletBinder = (ServletRequestDataBinder) binder; // servletBinder.bind(servletRequest); // } }
From source file:com.ms.commons.summer.web.handler.DataBinderUtil.java
/** * ?/*from www.j ava 2 s .com*/ * * @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 { // ?? if (BeanUtils.isSimpleProperty(paramType)) { SimpleTypeConverter converter = new SimpleTypeConverter(); Object value; // ? 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 { // ???POJO 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; }