Example usage for org.springframework.web.method.support ModelAndViewContainer containsAttribute

List of usage examples for org.springframework.web.method.support ModelAndViewContainer containsAttribute

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Introduction

In this page you can find the example usage for org.springframework.web.method.support ModelAndViewContainer containsAttribute.

Prototype

public boolean containsAttribute(String name)

Source Link

Document

Whether the underlying model contains the given attribute name.

Usage

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  w w . ja v a 2 s . c  o 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: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  ww  .  j  av  a2 s  . 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.springframework.web.method.annotation.ModelAttributeMethodProcessor.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 BindException if data binding and validation result in an error
 * and the next method parameter is not of type {@link Errors}
 * @throws Exception if WebDataBinder initialization fails
 *///from  w  w  w .  j a  v a  2s. c  o m
@Override
@Nullable
public final Object resolveArgument(MethodParameter parameter, @Nullable ModelAndViewContainer mavContainer,
        NativeWebRequest webRequest, @Nullable WebDataBinderFactory binderFactory) throws Exception {

    Assert.state(mavContainer != null, "ModelAttributeMethodProcessor requires ModelAndViewContainer");
    Assert.state(binderFactory != null, "ModelAttributeMethodProcessor requires WebDataBinderFactory");

    String name = ModelFactory.getNameForParameter(parameter);
    ModelAttribute ann = parameter.getParameterAnnotation(ModelAttribute.class);
    if (ann != null) {
        mavContainer.setBinding(name, ann.binding());
    }

    Object attribute = null;
    BindingResult bindingResult = null;

    if (mavContainer.containsAttribute(name)) {
        attribute = mavContainer.getModel().get(name);
    } else {
        // Create attribute instance
        try {
            attribute = createAttribute(name, parameter, binderFactory, webRequest);
        } catch (BindException ex) {
            if (isBindExceptionRequired(parameter)) {
                // No BindingResult parameter -> fail with BindException
                throw ex;
            }
            // Otherwise, expose null/empty value and associated BindingResult
            if (parameter.getParameterType() == Optional.class) {
                attribute = Optional.empty();
            }
            bindingResult = ex.getBindingResult();
        }
    }

    if (bindingResult == null) {
        // Bean property binding and validation;
        // skipped in case of binding failure on construction.
        WebDataBinder binder = binderFactory.createBinder(webRequest, attribute, name);
        if (binder.getTarget() != null) {
            if (!mavContainer.isBindingDisabled(name)) {
                bindRequestParameters(binder, webRequest);
            }
            validateIfApplicable(binder, parameter);
            if (binder.getBindingResult().hasErrors() && isBindExceptionRequired(binder, parameter)) {
                throw new BindException(binder.getBindingResult());
            }
        }
        // Value type adaptation, also covering java.util.Optional
        if (!parameter.getParameterType().isInstance(attribute)) {
            attribute = binder.convertIfNecessary(binder.getTarget(), parameter.getParameterType(), parameter);
        }
        bindingResult = binder.getBindingResult();
    }

    // Add resolved attribute and BindingResult at the end of the model
    Map<String, Object> bindingResultModel = bindingResult.getModel();
    mavContainer.removeAttributes(bindingResultModel);
    mavContainer.addAllAttributes(bindingResultModel);

    return attribute;
}

From source file:org.springframework.web.method.annotation.ModelFactory.java

/**
 * Populate the model in the following order:
 * <ol>/* w  w  w.j  a v a  2  s  .co  m*/
 * <li>Retrieve "known" session attributes listed as {@code @SessionAttributes}.
 * <li>Invoke {@code @ModelAttribute} methods
 * <li>Find {@code @ModelAttribute} method arguments also listed as
 * {@code @SessionAttributes} and ensure they're present in the model raising
 * an exception if necessary.
 * </ol>
 * @param request the current request
 * @param container a container with the model to be initialized
 * @param handlerMethod the method for which the model is initialized
 * @throws Exception may arise from {@code @ModelAttribute} methods
 */
public void initModel(NativeWebRequest request, ModelAndViewContainer container, HandlerMethod handlerMethod)
        throws Exception {

    Map<String, ?> sessionAttributes = this.sessionAttributesHandler.retrieveAttributes(request);
    container.mergeAttributes(sessionAttributes);
    invokeModelAttributeMethods(request, container);

    for (String name : findSessionAttributeArguments(handlerMethod)) {
        if (!container.containsAttribute(name)) {
            Object value = this.sessionAttributesHandler.retrieveAttribute(request, name);
            if (value == null) {
                throw new HttpSessionRequiredException("Expected session attribute '" + name + "'", name);
            }
            container.addAttribute(name, value);
        }
    }
}

From source file:org.springframework.web.method.annotation.ModelFactory.java

/**
 * Invoke model attribute methods to populate the model.
 * Attributes are added only if not already present in the model.
 *//*from   w  w w  .  j ava 2  s  . c om*/
private void invokeModelAttributeMethods(NativeWebRequest request, ModelAndViewContainer container)
        throws Exception {

    while (!this.modelMethods.isEmpty()) {
        InvocableHandlerMethod modelMethod = getNextModelMethod(container).getHandlerMethod();
        ModelAttribute ann = modelMethod.getMethodAnnotation(ModelAttribute.class);
        Assert.state(ann != null, "No ModelAttribute annotation");
        if (container.containsAttribute(ann.name())) {
            if (!ann.binding()) {
                container.setBindingDisabled(ann.name());
            }
            continue;
        }

        Object returnValue = modelMethod.invokeForRequest(request, container);
        if (!modelMethod.isVoid()) {
            String returnValueName = getNameForReturnValue(returnValue, modelMethod.getReturnType());
            if (!ann.binding()) {
                container.setBindingDisabled(returnValueName);
            }
            if (!container.containsAttribute(returnValueName)) {
                container.addAttribute(returnValueName, returnValue);
            }
        }
    }
}

From source file:org.springframework.web.method.annotation.support.ModelAttributeMethodProcessor.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 BindException if data binding and validation result in an error
 * and the next method parameter is not of type {@link Errors}.
 * @throws Exception if WebDataBinder initialization fails.
 *///from w ww  .  j av  a 2  s  . c  om
public final Object resolveArgument(MethodParameter parameter, ModelAndViewContainer mavContainer,
        NativeWebRequest request, WebDataBinderFactory binderFactory) throws Exception {
    String name = ModelFactory.getNameForParameter(parameter);
    Object target = (mavContainer.containsAttribute(name)) ? mavContainer.getModel().get(name)
            : createAttribute(name, parameter, binderFactory, request);

    WebDataBinder binder = binderFactory.createBinder(request, target, name);

    if (binder.getTarget() != null) {
        bindRequestParameters(binder, request);

        if (isValidationApplicable(binder.getTarget(), parameter)) {
            binder.validate();
        }

        if (binder.getBindingResult().hasErrors()) {
            if (isBindExceptionRequired(binder, parameter)) {
                throw new BindException(binder.getBindingResult());
            }
        }
    }

    mavContainer.addAllAttributes(binder.getBindingResult().getModel());

    return binder.getTarget();
}