Examples of org.springframework.web.bind.WebDataBinder

org.springframework.web.bind.WebDataBinder
Special {@link DataBinder} for data binding from web request parametersto JavaBean objects. Designed for web environments, but not dependent on the Servlet API; serves as base class for more specific DataBinder variants, such as {@link org.springframework.web.bind.ServletRequestDataBinder}.
Includes support for field markers which address a common problem with HTML checkboxes and select options: detecting that a field was part of the form, but did not generate a request parameter because it was empty. A field marker allows to detect that state and reset the corresponding bean property accordingly. Default values, for parameters that are otherwise not present, can specify a value for the field other then empty. @author Juergen Hoeller @author Scott Andrews @since 1.2 @see #registerCustomEditor @see #setAllowedFields @see #setRequiredFields @see #setFieldMarkerPrefix @see #setFieldDefaultPrefix @see ServletRequestDataBinder

        verify(messageSourceMock, times(1)).getMessage(eq(messageCode), any(Object[].class), any(Locale.class));
        verifyNoMoreInteractions(messageSourceMock);
    }


    private BindingResult bindAndValidate(HttpServletRequest request, Object formObject) {
        WebDataBinder binder = new WebDataBinder(formObject);
        binder.setValidator(validator);
        binder.bind(new MutablePropertyValues(request.getParameterMap()));
        binder.getValidator().validate(binder.getTarget(), binder.getBindingResult());
        return binder.getBindingResult();
    }

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      if (paramName != null) {
        args[i] = resolveRequestParam(paramName, paramRequired, 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(webRequest, binder, !assignBindingResult);
        }
        args[i] = binder.getTarget();
        if (assignBindingResult) {
          args[i + 1] = binder.getBindingResult();
          i++;
        }
        implicitModel.putAll(binder.getBindingResult().getModel());
      }
    }


    return args;
  }

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        throw new IllegalStateException("Optional " + paramType + " parameter '" + paramName +
            "' is not present but cannot be translated into a null value due to being declared as a " +
            "primitive type. Consider declaring it as object wrapper for the corresponding primitive type.");
      }
    }
    WebDataBinder binder = createBinder(webRequest, null, paramName);
    initBinder(handlerForInitBinderCall, paramName, binder, webRequest);
    return binder.convertIfNecessary(paramValue, paramType, methodParam);
  }

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      }
    }
    else {
      bindObject = BeanUtils.instantiateClass(paramType);
    }
    WebDataBinder binder = createBinder(webRequest, bindObject, name);
    initBinder(handler, name, binder, webRequest);
    return binder;
  }

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      }
      if (!attrName.startsWith(BindingResult.MODEL_KEY_PREFIX) &&
          (isSessionAttr || isBindingCandidate(attrValue))) {
        String bindingResultKey = BindingResult.MODEL_KEY_PREFIX + attrName;
        if (mavModel != null && !model.containsKey(bindingResultKey)) {
          WebDataBinder binder = createBinder(webRequest, attrValue, attrName);
          initBinder(handler, attrName, binder, webRequest);
          mavModel.put(bindingResultKey, binder.getBindingResult());
        }
      }
    }
  }

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   * initialize it through a {@link WebBindingInitializer}. 
   * @throws Exception in case of invalid state or arguments
   */
  public final WebDataBinder createBinder(NativeWebRequest webRequest, Object target, String objectName)
      throws Exception {
    WebDataBinder dataBinder = createBinderInstance(target, objectName, webRequest);
    if (this.initializer != null) {
      this.initializer.initBinder(dataBinder, webRequest);
    }
    initBinder(dataBinder, webRequest);
    return dataBinder;

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      }
      arg = handleNullValue(namedValueInfo.name, arg, paramType);
    }


    if (binderFactory != null) {
      WebDataBinder binder = binderFactory.createBinder(webRequest, null, namedValueInfo.name);
      arg = binder.convertIfNecessary(arg, paramType, parameter);
    }


    handleResolvedValue(arg, namedValueInfo.name, parameter, mavContainer, webRequest);


    return arg;

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    String name = ModelFactory.getNameForParameter(parameter);
    Object attribute = (mavContainer.containsAttribute(name)) ?
        mavContainer.getModel().get(name) : createAttribute(name, parameter, binderFactory, request);


    WebDataBinder binder = binderFactory.createBinder(request, attribute, name);
    if (binder.getTarget() != null) {
      bindRequestParameters(binder, request);
      validateIfApplicable(binder, parameter);
      if (binder.getBindingResult().hasErrors()) {
        if (isBindExceptionRequired(binder, parameter)) {
          throw new BindException(binder.getBindingResult());
        }
      }
    }


    // Add resolved attribute and BindingResult at the end of the model


    Map<String, Object> bindingResultModel = binder.getBindingResult().getModel();
    mavContainer.removeAttributes(bindingResultModel);
    mavContainer.addAllAttributes(bindingResultModel);


    return binder.getTarget();
  }

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      if (isBindingCandidate(name, value)) {
        String bindingResultKey = BindingResult.MODEL_KEY_PREFIX + name;
      
        if (!model.containsAttribute(bindingResultKey)) {
          WebDataBinder dataBinder = binderFactory.createBinder(request, value, name);
          model.put(bindingResultKey, dataBinder.getBindingResult());
        }
      }
    }
  }

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      NativeWebRequest webRequest, WebDataBinderFactory binderFactory) throws Exception {


    Object argument = readWithMessageConverters(webRequest, parameter, parameter.getGenericParameterType());


    String name = Conventions.getVariableNameForParameter(parameter);
    WebDataBinder binder = binderFactory.createBinder(webRequest, argument, name);


    if (argument != null) {
      validate(binder, parameter);
    }


    mavContainer.addAttribute(BindingResult.MODEL_KEY_PREFIX + name, binder.getBindingResult());


    return argument;
  }

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