org.springframework.core.Conventions Java Examples

/**
 * Add the given filter to the ServletContext and map it to the
 * {@code DispatcherServlet} as follows:
 * <ul>
 * <li>a default filter name is chosen based on its concrete type
 * <li>the {@code asyncSupported} flag is set depending on the
 * return value of {@link #isAsyncSupported() asyncSupported}
 * <li>a filter mapping is created with dispatcher types {@code REQUEST},
 * {@code FORWARD}, {@code INCLUDE}, and conditionally {@code ASYNC} depending
 * on the return value of {@link #isAsyncSupported() asyncSupported}
 * </ul>
 * <p>If the above defaults are not suitable or insufficient, override this
 * method and register filters directly with the {@code ServletContext}.
 * @param servletContext the servlet context to register filters with
 * @param filter the filter to be registered
 * @return the filter registration
 */
protected FilterRegistration.Dynamic registerServletFilter(ServletContext servletContext, Filter filter) {
	String filterName = Conventions.getVariableName(filter);
	Dynamic registration = servletContext.addFilter(filterName, filter);

	if (registration == null) {
		int counter = 0;
		while (registration == null) {
			if (counter == 100) {
				throw new IllegalStateException("Failed to register filter with name '" + filterName + "'. " +
						"Check if there is another filter registered under the same name.");
			}
			registration = servletContext.addFilter(filterName + "#" + counter, filter);
			counter++;
		}
	}

	registration.setAsyncSupported(isAsyncSupported());
	registration.addMappingForServletNames(getDispatcherTypes(), false, getServletName());
	return registration;
}
 

private Object getErrors(MethodParameter parameter, BindingContext context) {
	Assert.isTrue(parameter.getParameterIndex() > 0,
			"Errors argument must be declared immediately after a model attribute argument");

	int index = parameter.getParameterIndex() - 1;
	MethodParameter attributeParam = MethodParameter.forExecutable(parameter.getExecutable(), index);
	ReactiveAdapter adapter = getAdapterRegistry().getAdapter(attributeParam.getParameterType());

	Assert.state(adapter == null, "An @ModelAttribute and an Errors/BindingResult argument " +
			"cannot both be declared with an async type wrapper. " +
			"Either declare the @ModelAttribute without an async wrapper type or " +
			"handle a WebExchangeBindException error signal through the async type.");

	ModelAttribute ann = parameter.getParameterAnnotation(ModelAttribute.class);
	String name = (ann != null && StringUtils.hasText(ann.value()) ?
			ann.value() : Conventions.getVariableNameForParameter(attributeParam));
	Object errors = context.getModel().asMap().get(BindingResult.MODEL_KEY_PREFIX + name);

	Assert.state(errors != null, () -> "An Errors/BindingResult argument is expected " +
			"immediately after the @ModelAttribute argument to which it applies. " +
			"For @RequestBody and @RequestPart arguments, please declare them with a reactive " +
			"type wrapper and use its onError operators to handle WebExchangeBindException: " +
			parameter.getMethod());

	return errors;
}
 

private void invokeTimeUnitOptions(Element element, String id, ParserContext parserContext, RedissonNamespaceParserSupport helper, String timeAttrubute, String timeUnitAttribute) {
    if (helper.hasAttribute(element, timeUnitAttribute)) {
        Assert.state(
                helper.hasAttribute(element, timeAttrubute),
                "Missing \"" + timeAttrubute + "\" attribute in \""
                + RedissonNamespaceParserSupport.LOCAL_CACHED_MAP_OPTIONS_ELEMENT
                + "\" element.");
        helper.invoker(id,
                Conventions.attributeNameToPropertyName(timeAttrubute),
                new Object[]{
                    Integer.parseInt(
                            helper.getAttribute(element, timeAttrubute)),
                    helper.getAttribute(element, timeUnitAttribute)},
                parserContext);
    }
}
 

@Override
protected void parseNested(Element element, ParserContext parserContext, BeanDefinitionBuilder builder, BeanDefinition bd) {
    bd.setFactoryBeanName(element.getAttribute(
            RedissonNamespaceParserSupport.REDISSON_REF_ATTRIBUTE));
    String typeName
            = Conventions.attributeNameToPropertyName(element.getLocalName());
    bd.setFactoryMethodName("get" + StringUtils.capitalize(typeName));
    
    helper.addConstructorArgs(element, KEY_ATTRIBUTE,
            String.class, builder);
    helper.addConstructorArgs(element, TOPIC_ATTRIBUTE,
            String.class, builder);
    helper.addConstructorArgs(element, PATTERN_ATTRIBUTE,
            String.class, builder);
    helper.addConstructorArgs(element, SERVICE_ATTRIBUTE,
            String.class, builder);
    helper.addConstructorArgs(element, CODEC_REF_ATTRIBUTE,
            Codec.class, builder);
    if (RDestroyable.class.isAssignableFrom(getBeanClass(element))) {
        ((AbstractBeanDefinition) bd).setDestroyMethodName("destroy");
    }
}
 

@Override
public BeanDefinitionHolder decorate(Node node, BeanDefinitionHolder definition, ParserContext parserContext) {
	if (node instanceof Attr) {
		Attr attr = (Attr) node;
		String propertyName = parserContext.getDelegate().getLocalName(attr);
		String propertyValue = attr.getValue();
		MutablePropertyValues pvs = definition.getBeanDefinition().getPropertyValues();
		if (pvs.contains(propertyName)) {
			parserContext.getReaderContext().error("Property '" + propertyName + "' is already defined using " +
					"both <property> and inline syntax. Only one approach may be used per property.", attr);
		}
		if (propertyName.endsWith(REF_SUFFIX)) {
			propertyName = propertyName.substring(0, propertyName.length() - REF_SUFFIX.length());
			pvs.add(Conventions.attributeNameToPropertyName(propertyName), new RuntimeBeanReference(propertyValue));
		}
		else {
			pvs.add(Conventions.attributeNameToPropertyName(propertyName), propertyValue);
		}
	}
	return definition;
}
 

/**
 * Throws MethodArgumentNotValidException if validation fails.
 * @throws HttpMessageNotReadableException if {@link RequestBody#required()}
 * is {@code true} and there is no body content or if there is no suitable
 * converter to read the content with.
 */
@Override
public Object resolveArgument(MethodParameter parameter, ModelAndViewContainer mavContainer,
		NativeWebRequest webRequest, WebDataBinderFactory binderFactory) throws Exception {

	parameter = parameter.nestedIfOptional();
	Object arg = readWithMessageConverters(webRequest, parameter, parameter.getNestedGenericParameterType());
	String name = Conventions.getVariableNameForParameter(parameter);

	WebDataBinder binder = binderFactory.createBinder(webRequest, arg, name);
	if (arg != null) {
		validateIfApplicable(binder, parameter);
		if (binder.getBindingResult().hasErrors() && isBindExceptionRequired(binder, parameter)) {
			throw new MethodArgumentNotValidException(parameter, binder.getBindingResult());
		}
	}
	mavContainer.addAttribute(BindingResult.MODEL_KEY_PREFIX + name, binder.getBindingResult());

	return adaptArgumentIfNecessary(arg, parameter);
}
 

private void parseChildElements(Element element, String parentId, String redissonRef, BeanDefinitionBuilder redissonDef, ParserContext parserContext) {
    if (element.hasChildNodes()) {
        CompositeComponentDefinition compositeDef
                = new CompositeComponentDefinition(parentId,
                        parserContext.extractSource(element));
        parserContext.pushContainingComponent(compositeDef);
        List<Element> childElts = DomUtils.getChildElements(element);
        for (Element elt : childElts) {
            if (BeanDefinitionParserDelegate.QUALIFIER_ELEMENT.equals(elt.getLocalName())) {
                continue; //parsed elsewhere
            }
            String localName = parserContext.getDelegate().getLocalName(elt);
            localName = Conventions.attributeNameToPropertyName(localName);
            if (ConfigType.contains(localName)) {
                parseConfigTypes(elt, localName, redissonDef, parserContext);
            } else if (AddressType.contains(localName)) {
                parseAddressTypes(elt, localName, redissonDef, parserContext);
            } else if (helper.isRedissonNS(elt)) {
                elt.setAttribute(REDISSON_REF, redissonRef);
                parserContext.getDelegate().parseCustomElement(elt);
            }
        }
        parserContext.popContainingComponent();
    }
}
 

public void parseAttributes(Element element, ParserContext parserContext, BeanDefinitionBuilder builder) {
    NamedNodeMap attributes = element.getAttributes();
    for (int x = 0; x < attributes.getLength(); x++) {
        Attr attribute = (Attr) attributes.item(x);
        if (isEligibleAttribute(attribute)) {
            String propertyName = attribute.getLocalName();
            if (propertyName.endsWith(REF_SUFFIX)) {
                propertyName = propertyName.substring(0, attribute.getLocalName().length() - REF_SUFFIX.length());
            }
            propertyName = Conventions
                    .attributeNameToPropertyName(propertyName);
            Assert.state(StringUtils.hasText(propertyName),
                    "Illegal property name returned from"
                            + " 'extractPropertyName(String)': cannot be"
                            + " null or empty.");
            if (attribute.getLocalName().endsWith(REF_SUFFIX)) {
                builder.addPropertyReference(propertyName,
                        attribute.getValue());
            } else {
                builder.addPropertyValue(propertyName, attribute.getValue());
            }
        }
    }
}
 

/**
 * Add the given filter to the ServletContext and map it to the
 * {@code DispatcherServlet} as follows:
 * <ul>
 * <li>a default filter name is chosen based on its concrete type
 * <li>the {@code asyncSupported} flag is set depending on the
 * return value of {@link #isAsyncSupported() asyncSupported}
 * <li>a filter mapping is created with dispatcher types {@code REQUEST},
 * {@code FORWARD}, {@code INCLUDE}, and conditionally {@code ASYNC} depending
 * on the return value of {@link #isAsyncSupported() asyncSupported}
 * </ul>
 * <p>If the above defaults are not suitable or insufficient, override this
 * method and register filters directly with the {@code ServletContext}.
 * @param servletContext the servlet context to register filters with
 * @param filter the filter to be registered
 * @return the filter registration
 */
protected FilterRegistration.Dynamic registerServletFilter(ServletContext servletContext, Filter filter) {
	String filterName = Conventions.getVariableName(filter);
	Dynamic registration = servletContext.addFilter(filterName, filter);
	if (registration == null) {
		int counter = -1;
		while (counter == -1 || registration == null) {
			counter++;
			registration = servletContext.addFilter(filterName + "#" + counter, filter);
			Assert.isTrue(counter < 100,
					"Failed to register filter '" + filter + "'." +
					"Could the same Filter instance have been registered already?");
		}
	}
	registration.setAsyncSupported(isAsyncSupported());
	registration.addMappingForServletNames(getDispatcherTypes(), false, getServletName());
	return registration;
}
 

@Override
public BeanDefinitionHolder decorate(Node node, BeanDefinitionHolder definition, ParserContext parserContext) {
	if (node instanceof Attr) {
		Attr attr = (Attr) node;
		String propertyName = parserContext.getDelegate().getLocalName(attr);
		String propertyValue = attr.getValue();
		MutablePropertyValues pvs = definition.getBeanDefinition().getPropertyValues();
		if (pvs.contains(propertyName)) {
			parserContext.getReaderContext().error("Property '" + propertyName + "' is already defined using " +
					"both <property> and inline syntax. Only one approach may be used per property.", attr);
		}
		if (propertyName.endsWith(REF_SUFFIX)) {
			propertyName = propertyName.substring(0, propertyName.length() - REF_SUFFIX.length());
			pvs.add(Conventions.attributeNameToPropertyName(propertyName), new RuntimeBeanReference(propertyValue));
		}
		else {
			pvs.add(Conventions.attributeNameToPropertyName(propertyName), propertyValue);
		}
	}
	return definition;
}
 

/**
 * Throws MethodArgumentNotValidException if validation fails.
 * @throws HttpMessageNotReadableException if {@link RequestBody#required()}
 * is {@code true} and there is no body content or if there is no suitable
 * converter to read the content with.
 */
@Override
public Object resolveArgument(MethodParameter parameter, @Nullable ModelAndViewContainer mavContainer,
		NativeWebRequest webRequest, @Nullable WebDataBinderFactory binderFactory) throws Exception {

	parameter = parameter.nestedIfOptional();
	Object arg = readWithMessageConverters(webRequest, parameter, parameter.getNestedGenericParameterType());
	String name = Conventions.getVariableNameForParameter(parameter);

	if (binderFactory != null) {
		WebDataBinder binder = binderFactory.createBinder(webRequest, arg, name);
		if (arg != null) {
			validateIfApplicable(binder, parameter);
			if (binder.getBindingResult().hasErrors() && isBindExceptionRequired(binder, parameter)) {
				throw new MethodArgumentNotValidException(parameter, binder.getBindingResult());
			}
		}
		if (mavContainer != null) {
			mavContainer.addAttribute(BindingResult.MODEL_KEY_PREFIX + name, binder.getBindingResult());
		}
	}

	return adaptArgumentIfNecessary(arg, parameter);
}
 

private WebDataBinder resolveModelAttribute(String attrName, MethodParameter methodParam,
		ExtendedModelMap implicitModel, NativeWebRequest webRequest, Object handler) throws Exception {

	// Bind request parameter onto object...
	String name = attrName;
	if ("".equals(name)) {
		name = Conventions.getVariableNameForParameter(methodParam);
	}
	Class<?> paramType = methodParam.getParameterType();
	Object bindObject;
	if (implicitModel.containsKey(name)) {
		bindObject = implicitModel.get(name);
	}
	else if (this.methodResolver.isSessionAttribute(name, paramType)) {
		bindObject = this.sessionAttributeStore.retrieveAttribute(webRequest, name);
		if (bindObject == null) {
			raiseSessionRequiredException("Session attribute '" + name + "' required - not found in session");
		}
	}
	else {
		bindObject = BeanUtils.instantiateClass(paramType);
	}
	WebDataBinder binder = createBinder(webRequest, bindObject, name);
	initBinder(handler, name, binder, webRequest);
	return binder;
}
 

/**
 * Add the given filter to the ServletContext and map it to the
 * {@code DispatcherServlet} as follows:
 * <ul>
 * <li>a default filter name is chosen based on its concrete type
 * <li>the {@code asyncSupported} flag is set depending on the
 * return value of {@link #isAsyncSupported() asyncSupported}
 * <li>a filter mapping is created with dispatcher types {@code REQUEST},
 * {@code FORWARD}, {@code INCLUDE}, and conditionally {@code ASYNC} depending
 * on the return value of {@link #isAsyncSupported() asyncSupported}
 * </ul>
 * <p>If the above defaults are not suitable or insufficient, override this
 * method and register filters directly with the {@code ServletContext}.
 * @param servletContext the servlet context to register filters with
 * @param filter the filter to be registered
 * @return the filter registration
 */
protected FilterRegistration.Dynamic registerServletFilter(ServletContext servletContext, Filter filter) {
	String filterName = Conventions.getVariableName(filter);
	Dynamic registration = servletContext.addFilter(filterName, filter);

	if (registration == null) {
		int counter = 0;
		while (registration == null) {
			if (counter == 100) {
				throw new IllegalStateException("Failed to register filter with name '" + filterName + "'. " +
						"Check if there is another filter registered under the same name.");
			}
			registration = servletContext.addFilter(filterName + "#" + counter, filter);
			counter++;
		}
	}

	registration.setAsyncSupported(isAsyncSupported());
	registration.addMappingForServletNames(getDispatcherTypes(), false, getServletName());
	return registration;
}
 

/**
 * Throws MethodArgumentNotValidException if validation fails.
 * @throws HttpMessageNotReadableException if {@link RequestBody#required()}
 * is {@code true} and there is no body content or if there is no suitable
 * converter to read the content with.
 */
@Override
public Object resolveArgument(MethodParameter parameter, @Nullable ModelAndViewContainer mavContainer,
		NativeWebRequest webRequest, @Nullable WebDataBinderFactory binderFactory) throws Exception {

	parameter = parameter.nestedIfOptional();
	Object arg = readWithMessageConverters(webRequest, parameter, parameter.getNestedGenericParameterType());
	String name = Conventions.getVariableNameForParameter(parameter);

	if (binderFactory != null) {
		WebDataBinder binder = binderFactory.createBinder(webRequest, arg, name);
		if (arg != null) {
			validateIfApplicable(binder, parameter);
			if (binder.getBindingResult().hasErrors() && isBindExceptionRequired(binder, parameter)) {
				throw new MethodArgumentNotValidException(parameter, binder.getBindingResult());
			}
		}
		if (mavContainer != null) {
			mavContainer.addAttribute(BindingResult.MODEL_KEY_PREFIX + name, binder.getBindingResult());
		}
	}

	return adaptArgumentIfNecessary(arg, parameter);
}
 

@Override
public BeanDefinitionHolder decorate(Node node, BeanDefinitionHolder definition, ParserContext parserContext) {
	if (node instanceof Attr) {
		Attr attr = (Attr) node;
		String propertyName = parserContext.getDelegate().getLocalName(attr);
		String propertyValue = attr.getValue();
		MutablePropertyValues pvs = definition.getBeanDefinition().getPropertyValues();
		if (pvs.contains(propertyName)) {
			parserContext.getReaderContext().error("Property '" + propertyName + "' is already defined using " +
					"both <property> and inline syntax. Only one approach may be used per property.", attr);
		}
		if (propertyName.endsWith(REF_SUFFIX)) {
			propertyName = propertyName.substring(0, propertyName.length() - REF_SUFFIX.length());
			pvs.add(Conventions.attributeNameToPropertyName(propertyName), new RuntimeBeanReference(propertyValue));
		}
		else {
			pvs.add(Conventions.attributeNameToPropertyName(propertyName), propertyValue);
		}
	}
	return definition;
}
 

@Override
protected Class<?> getBeanClass(Element element) {
    String elementName
            = Conventions.attributeNameToPropertyName(
                    element.getLocalName());
    try {
        String name = RedissonNamespaceParserSupport.API_CLASS_PATH_PREFIX;
        if (FAIL_LOCK.equals(elementName)) {
            name += StringUtils.capitalize("lock");
        } else {
            name += StringUtils.capitalize(elementName);
        }
        
        return Class.forName(name);
    } catch (ClassNotFoundException ex) {
        throw new IllegalArgumentException(ex);
    }
}
 

private Object getErrors(MethodParameter parameter, BindingContext context) {
	Assert.isTrue(parameter.getParameterIndex() > 0,
			"Errors argument must be declared immediately after a model attribute argument");

	int index = parameter.getParameterIndex() - 1;
	MethodParameter attributeParam = MethodParameter.forExecutable(parameter.getExecutable(), index);
	ReactiveAdapter adapter = getAdapterRegistry().getAdapter(attributeParam.getParameterType());

	Assert.state(adapter == null, "An @ModelAttribute and an Errors/BindingResult argument " +
			"cannot both be declared with an async type wrapper. " +
			"Either declare the @ModelAttribute without an async wrapper type or " +
			"handle a WebExchangeBindException error signal through the async type.");

	ModelAttribute ann = parameter.getParameterAnnotation(ModelAttribute.class);
	String name = (ann != null && StringUtils.hasText(ann.value()) ?
			ann.value() : Conventions.getVariableNameForParameter(attributeParam));
	Object errors = context.getModel().asMap().get(BindingResult.MODEL_KEY_PREFIX + name);

	Assert.state(errors != null, () -> "An Errors/BindingResult argument is expected " +
			"immediately after the @ModelAttribute argument to which it applies. " +
			"For @RequestBody and @RequestPart arguments, please declare them with a reactive " +
			"type wrapper and use its onError operators to handle WebExchangeBindException: " +
			parameter.getMethod());

	return errors;
}
 

@Override
public BeanDefinitionHolder decorate(Node node, BeanDefinitionHolder definition, ParserContext parserContext) {
	if (node instanceof Attr) {
		Attr attr = (Attr) node;
		String propertyName = parserContext.getDelegate().getLocalName(attr);
		String propertyValue = attr.getValue();
		MutablePropertyValues pvs = definition.getBeanDefinition().getPropertyValues();
		if (pvs.contains(propertyName)) {
			parserContext.getReaderContext().error("Property '" + propertyName + "' is already defined using " +
					"both <property> and inline syntax. Only one approach may be used per property.", attr);
		}
		if (propertyName.endsWith(REF_SUFFIX)) {
			propertyName = propertyName.substring(0, propertyName.length() - REF_SUFFIX.length());
			pvs.add(Conventions.attributeNameToPropertyName(propertyName), new RuntimeBeanReference(propertyValue));
		}
		else {
			pvs.add(Conventions.attributeNameToPropertyName(propertyName), propertyValue);
		}
	}
	return definition;
}
 

@Override
public BeanDefinitionHolder decorate(Node node, BeanDefinitionHolder definition, ParserContext parserContext) {
	if (node instanceof Attr) {
		Attr attr = (Attr) node;
		String propertyName = parserContext.getDelegate().getLocalName(attr);
		String propertyValue = attr.getValue();
		MutablePropertyValues pvs = definition.getBeanDefinition().getPropertyValues();
		if (pvs.contains(propertyName)) {
			parserContext.getReaderContext().error("Property '" + propertyName + "' is already defined using " +
					"both <property> and inline syntax. Only one approach may be used per property.", attr);
		}
		if (propertyName.endsWith(REF_SUFFIX)) {
			propertyName = propertyName.substring(0, propertyName.length() - REF_SUFFIX.length());
			pvs.add(Conventions.attributeNameToPropertyName(propertyName), new RuntimeBeanReference(propertyValue));
		}
		else {
			pvs.add(Conventions.attributeNameToPropertyName(propertyName), propertyValue);
		}
	}
	return definition;
}
 

/**
 * Throws MethodArgumentNotValidException if validation fails.
 * @throws HttpMessageNotReadableException if {@link RequestBody#required()}
 * is {@code true} and there is no body content or if there is no suitable
 * converter to read the content with.
 */
@Override
public Object resolveArgument(MethodParameter parameter, ModelAndViewContainer mavContainer,
		NativeWebRequest webRequest, WebDataBinderFactory binderFactory) throws Exception {

	Object arg = readWithMessageConverters(webRequest, parameter, parameter.getGenericParameterType());
	String name = Conventions.getVariableNameForParameter(parameter);

	WebDataBinder binder = binderFactory.createBinder(webRequest, arg, name);
	if (arg != null) {
		validateIfApplicable(binder, parameter);
		if (binder.getBindingResult().hasErrors() && isBindExceptionRequired(binder, parameter)) {
			throw new MethodArgumentNotValidException(parameter, binder.getBindingResult());
		}
	}
	mavContainer.addAttribute(BindingResult.MODEL_KEY_PREFIX + name, binder.getBindingResult());

	return arg;
}
 

/**
 * Add the given filter to the ServletContext and map it to the
 * {@code DispatcherServlet} as follows:
 * <ul>
 * <li>a default filter name is chosen based on its concrete type
 * <li>the {@code asyncSupported} flag is set depending on the
 * return value of {@link #isAsyncSupported() asyncSupported}
 * <li>a filter mapping is created with dispatcher types {@code REQUEST},
 * {@code FORWARD}, {@code INCLUDE}, and conditionally {@code ASYNC} depending
 * on the return value of {@link #isAsyncSupported() asyncSupported}
 * </ul>
 * <p>If the above defaults are not suitable or insufficient, override this
 * method and register filters directly with the {@code ServletContext}.
 * @param servletContext the servlet context to register filters with
 * @param filter the filter to be registered
 * @return the filter registration
 */
protected FilterRegistration.Dynamic registerServletFilter(ServletContext servletContext, Filter filter) {
	String filterName = Conventions.getVariableName(filter);
	Dynamic registration = servletContext.addFilter(filterName, filter);
	if (registration == null) {
		int counter = -1;
		while (counter == -1 || registration == null) {
			counter++;
			registration = servletContext.addFilter(filterName + "#" + counter, filter);
			Assert.isTrue(counter < 100,
					"Failed to register filter '" + filter + "'." +
					"Could the same Filter instance have been registered already?");
		}
	}
	registration.setAsyncSupported(isAsyncSupported());
	registration.addMappingForServletNames(getDispatcherTypes(), false, getServletName());
	return registration;
}
 

private WebDataBinder resolveModelAttribute(String attrName, MethodParameter methodParam,
		ExtendedModelMap implicitModel, NativeWebRequest webRequest, Object handler) throws Exception {

	// Bind request parameter onto object...
	String name = attrName;
	if ("".equals(name)) {
		name = Conventions.getVariableNameForParameter(methodParam);
	}
	Class<?> paramType = methodParam.getParameterType();
	Object bindObject;
	if (implicitModel.containsKey(name)) {
		bindObject = implicitModel.get(name);
	}
	else if (this.methodResolver.isSessionAttribute(name, paramType)) {
		bindObject = this.sessionAttributeStore.retrieveAttribute(webRequest, name);
		if (bindObject == null) {
			raiseSessionRequiredException("Session attribute '" + name + "' required - not found in session");
		}
	}
	else {
		bindObject = BeanUtils.instantiateClass(paramType);
	}
	WebDataBinder binder = createBinder(webRequest, bindObject, name);
	initBinder(handler, name, binder, webRequest);
	return binder;
}
 

@Override
protected void parseNested(Element element, ParserContext parserContext, BeanDefinitionBuilder builder, BeanDefinition bd) {
    bd.setFactoryBeanName(element.getAttribute(
            RedissonNamespaceParserSupport.READ_WRITE_LOCK_REF_ATTRIBUTE));
    String typeName
            = Conventions.attributeNameToPropertyName(element.getLocalName());
    bd.setFactoryMethodName(typeName);
}
 

/**
 * Derive the model attribute name for the given return value. Results will be
 * based on:
 * <ol>
 * <li>the method {@code ModelAttribute} annotation value
 * <li>the declared return type if it is more specific than {@code Object}
 * <li>the actual return value type
 * </ol>
 * @param returnValue the value returned from a method invocation
 * @param returnType a descriptor for the return type of the method
 * @return the derived name (never {@code null} or empty String)
 */
public static String getNameForReturnValue(@Nullable Object returnValue, MethodParameter returnType) {
	ModelAttribute ann = returnType.getMethodAnnotation(ModelAttribute.class);
	if (ann != null && StringUtils.hasText(ann.value())) {
		return ann.value();
	}
	else {
		Method method = returnType.getMethod();
		Assert.state(method != null, "No handler method");
		Class<?> containingClass = returnType.getContainingClass();
		Class<?> resolvedType = GenericTypeResolver.resolveReturnType(method, containingClass);
		return Conventions.getVariableNameForReturnType(method, resolvedType, returnValue);
	}
}
 

protected final void addReturnValueAsModelAttribute(Method handlerMethod, Class<?> handlerType,
		Object returnValue, ExtendedModelMap implicitModel) {

	ModelAttribute attr = AnnotationUtils.findAnnotation(handlerMethod, ModelAttribute.class);
	String attrName = (attr != null ? attr.value() : "");
	if ("".equals(attrName)) {
		Class<?> resolvedType = GenericTypeResolver.resolveReturnType(handlerMethod, handlerType);
		attrName = Conventions.getVariableNameForReturnType(handlerMethod, resolvedType, returnValue);
	}
	implicitModel.addAttribute(attrName, returnValue);
}
 

@Override
protected String getBeanClassName(Element element) {
    String elementName
            = Conventions.attributeNameToPropertyName(
                    element.getLocalName());
    return RedissonNamespaceParserSupport.IMPL_CLASS_PATH_PREFIX
            + StringUtils.capitalize(elementName);
}
 

/**
 * Derive the model attribute name for the given return value based on:
 * <ol>
 * <li>the method {@code ModelAttribute} annotation value
 * <li>the declared return type if it is more specific than {@code Object}
 * <li>the actual return value type
 * </ol>
 * @param returnValue the value returned from a method invocation
 * @param returnType a descriptor for the return type of the method
 * @return the derived name (never {@code null} or empty String)
 */
public static String getNameForReturnValue(Object returnValue, MethodParameter returnType) {
	ModelAttribute ann = returnType.getMethodAnnotation(ModelAttribute.class);
	if (ann != null && StringUtils.hasText(ann.value())) {
		return ann.value();
	}
	else {
		Method method = returnType.getMethod();
		Class<?> containingClass = returnType.getContainingClass();
		Class<?> resolvedType = GenericTypeResolver.resolveReturnType(method, containingClass);
		return Conventions.getVariableNameForReturnType(method, resolvedType, returnValue);
	}
}
 

protected final void addReturnValueAsModelAttribute(Method handlerMethod, Class<?> handlerType,
		Object returnValue, ExtendedModelMap implicitModel) {

	ModelAttribute attr = AnnotationUtils.findAnnotation(handlerMethod, ModelAttribute.class);
	String attrName = (attr != null ? attr.value() : "");
	if ("".equals(attrName)) {
		Class<?> resolvedType = GenericTypeResolver.resolveReturnType(handlerMethod, handlerType);
		attrName = Conventions.getVariableNameForReturnType(handlerMethod, resolvedType, returnValue);
	}
	implicitModel.addAttribute(attrName, returnValue);
}
 

/**
 * Converts {@link TeapotMapping} to {@link Teapot} domain object. Apply
 * binding on {@link Teapot}.
 */
@Override
public Object resolveArgument(MethodParameter parameter, ModelAndViewContainer mavContainer,
        NativeWebRequest webRequest, WebDataBinderFactory binderFactory) throws Exception {

    /* Read mapping from request */
    TeapotMapping mapping = (TeapotMapping) readWithMessageConverters(
            webRequest, parameter, TeapotMapping.class);
    String name = Conventions.getVariableNameForParameter(parameter);

    /* Convert mapping to domain object */
    Teapot teapot = mapper.fromMapping(mapping);

    WebDataBinder binder = binderFactory
            .createBinder(webRequest, teapot, name);

    if (teapot != null) {
        validateIfApplicable(binder, parameter);
        if (binder.getBindingResult().hasErrors() && isBindExceptionRequired(binder, parameter)) {
            throw new MethodArgumentNotValidException(parameter, binder.getBindingResult());
        }
    }

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

    return teapot;
}
 

/**
 * Derive the model attribute name for the given return value using one of:
 * <ol>
 * 	<li>The method {@code ModelAttribute} annotation value
 * 	<li>The declared return type if it is more specific than {@code Object}
 * 	<li>The actual return value type
 * </ol>
 * @param returnValue the value returned from a method invocation
 * @param returnType the return type of the method
 * @return the model name, never {@code null} nor empty
 */
public static String getNameForReturnValue(Object returnValue, MethodParameter returnType) {
	ModelAttribute annotation = returnType.getMethodAnnotation(ModelAttribute.class);
	if (annotation != null && StringUtils.hasText(annotation.value())) {
		return annotation.value();
	}
	else {
		Method method = returnType.getMethod();
		Class<?> resolvedType = GenericTypeResolver.resolveReturnType(method, returnType.getContainingClass());
		return Conventions.getVariableNameForReturnType(method, resolvedType, returnValue);
	}
}