List of usage examples for org.springframework.web.bind WebDataBinder convertIfNecessary
@Override
@Nullable
public <T> T convertIfNecessary(@Nullable Object value, @Nullable Class<T> requiredType)
throws TypeMismatchException
From source file:com.fengduo.bee.commons.component.FormModelMethodArgumentResolver.java
/** * Resolve the argument from the model or if not found instantiate it with its default if it is available. The model * attribute is then populated with request values via data binding and optionally validated if * {@code @java.validation.Valid} is present on the argument. * //w w w . ja v a 2s.co m * @throws org.springframework.validation.BindException if data binding and validation result in an error and the * next method parameter is not of type {@link org.springframework.validation.Errors}. * @throws Exception if WebDataBinder initialization fails. */ public final Object resolveArgument(MethodParameter parameter, ModelAndViewContainer mavContainer, NativeWebRequest request, WebDataBinderFactory binderFactory) throws Exception { String name = parameter.getParameterAnnotation(FormBean.class).value(); Object target = (mavContainer.containsAttribute(name)) ? mavContainer.getModel().get(name) : createAttribute(name, parameter, binderFactory, request); WebDataBinder binder = binderFactory.createBinder(request, target, name); target = binder.getTarget(); if (target != null) { bindRequestParameters(mavContainer, binderFactory, binder, request, parameter); validateIfApplicable(binder, parameter); if (binder.getBindingResult().hasErrors()) { if (isBindExceptionRequired(binder, parameter)) { throw new BindException(binder.getBindingResult()); } } } target = binder.convertIfNecessary(binder.getTarget(), parameter.getParameterType()); mavContainer.addAttribute(name, target); return target; }
From source file:org.zht.framework.web.bind.resolver.FormModelMethodArgumentResolver.java
/** * Resolve the argument from the model or if not found instantiate it with * its default if it is available. The model attribute is then populated * with request values via data binding and optionally validated * if {@code @java.validation.Valid} is present on the argument. * * @throws org.springframework.validation.BindException * if data binding and validation result in an error * and the next method parameter is not of type {@link org.springframework.validation.Errors}. * @throws Exception if WebDataBinder initialization fails. *//*from w ww. j a va 2s. co m*/ public final Object resolveArgument(MethodParameter parameter, ModelAndViewContainer mavContainer, NativeWebRequest request, WebDataBinderFactory binderFactory) throws Exception { String name = parameter.getParameterAnnotation(FormModel.class).value(); Object target = (mavContainer.containsAttribute(name)) ? mavContainer.getModel().get(name) : createAttribute(name, parameter, binderFactory, request); WebDataBinder binder = binderFactory.createBinder(request, target, name); target = binder.getTarget(); if (target != null) { bindRequestParameters(mavContainer, binderFactory, binder, request, parameter); validateIfApplicable(binder, parameter); if (binder.getBindingResult().hasErrors()) { List<BindingResult> list = (List<BindingResult>) request .getAttribute(ValidateConstant.BINDING_RESULT_LIST_NAME, Integer.MAX_VALUE / 2 + 1); if (null == list) { list = new ArrayList<BindingResult>(); request.setAttribute(ValidateConstant.BINDING_RESULT_LIST_NAME, list, 0); } list.add(binder.getBindingResult()); request.setAttribute(ValidateConstant.BINDING_RESULT_HAS_ERROR, true, 0); // if (isBindExceptionRequired(binder, parameter)) { // throw new BindException(binder.getBindingResult()); // } } } target = binder.convertIfNecessary(binder.getTarget(), parameter.getParameterType()); mavContainer.addAttribute(name, target); return target; }
From source file:org.zht.framework.web.bind.resolver.FormModelMethodArgumentResolver.java
/** * {@inheritDoc}//from www. j av a 2 s. c o 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(); ServletRequest servletRequest = prepareServletRequest(binder.getTarget(), request, parameter); WebDataBinder simpleBinder = binderFactory.createBinder(request, null, null); 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); } }