Java WebApplicationContext.containsBean方法代碼示例

import org.springframework.web.context.WebApplicationContext; //導入方法依賴的package包/類
/**
 * Look up the EntityManagerFactory that this filter should use.
 * <p>The default implementation looks for a bean with the specified name
 * in Spring's root application context.
 * @return the EntityManagerFactory to use
 * @see #getEntityManagerFactoryBeanName
 */
protected EntityManagerFactory lookupEntityManagerFactory() {
	WebApplicationContext wac = WebApplicationContextUtils.getRequiredWebApplicationContext(getServletContext());
	String emfBeanName = getEntityManagerFactoryBeanName();
	String puName = getPersistenceUnitName();
	if (StringUtils.hasLength(emfBeanName)) {
		return wac.getBean(emfBeanName, EntityManagerFactory.class);
	}
	else if (!StringUtils.hasLength(puName) && wac.containsBean(DEFAULT_ENTITY_MANAGER_FACTORY_BEAN_NAME)) {
		return wac.getBean(DEFAULT_ENTITY_MANAGER_FACTORY_BEAN_NAME, EntityManagerFactory.class);
	}
	else {
		// Includes fallback search for single EntityManagerFactory bean by type.
		return EntityManagerFactoryUtils.findEntityManagerFactory(wac, puName);
	}
}
 

import org.springframework.web.context.WebApplicationContext; //導入方法依賴的package包/類
@Override
public Object getValue(ELContext elContext, Object base, Object property) throws ELException {
	if (base != null) {
		if (base instanceof WebApplicationContext) {
			WebApplicationContext wac = (WebApplicationContext) base;
			String beanName = property.toString();
			if (logger.isTraceEnabled()) {
				logger.trace("Attempting to resolve property '" + beanName + "' in root WebApplicationContext");
			}
			if (wac.containsBean(beanName)) {
				if (logger.isDebugEnabled()) {
					logger.debug("Successfully resolved property '" + beanName + "' in root WebApplicationContext");
				}
				elContext.setPropertyResolved(true);
				try {
					return wac.getBean(beanName);
				}
				catch (BeansException ex) {
					throw new ELException(ex);
				}
			}
			else {
				// Mimic standard JSF/JSP behavior when base is a Map by returning null.
				return null;
			}
		}
	}
	else {
		if (WEB_APPLICATION_CONTEXT_VARIABLE_NAME.equals(property)) {
			elContext.setPropertyResolved(true);
			return getWebApplicationContext(elContext);
		}
	}

	return null;
}
 

import org.springframework.web.context.WebApplicationContext; //導入方法依賴的package包/類
@Override
public Class<?> getType(ELContext elContext, Object base, Object property) throws ELException {
	if (base != null) {
		if (base instanceof WebApplicationContext) {
			WebApplicationContext wac = (WebApplicationContext) base;
			String beanName = property.toString();
			if (logger.isDebugEnabled()) {
				logger.debug("Attempting to resolve property '" + beanName + "' in root WebApplicationContext");
			}
			if (wac.containsBean(beanName)) {
				if (logger.isDebugEnabled()) {
					logger.debug("Successfully resolved property '" + beanName + "' in root WebApplicationContext");
				}
				elContext.setPropertyResolved(true);
				try {
					return wac.getType(beanName);
				}
				catch (BeansException ex) {
					throw new ELException(ex);
				}
			}
			else {
				// Mimic standard JSF/JSP behavior when base is a Map by returning null.
				return null;
			}
		}
	}
	else {
		if (WEB_APPLICATION_CONTEXT_VARIABLE_NAME.equals(property)) {
			elContext.setPropertyResolved(true);
			return WebApplicationContext.class;
		}
	}

	return null;
}
 

import org.springframework.web.context.WebApplicationContext; //導入方法依賴的package包/類
/**
 * Look for a MultipartResolver bean in the root web application context.
 * Supports a "multipartResolverBeanName" filter init param; the default
 * bean name is "filterMultipartResolver".
 * <p>This can be overridden to use a custom MultipartResolver instance,
 * for example if not using a Spring web application context.
 * @return the MultipartResolver instance, or {@code null} if none found
 */
protected MultipartResolver lookupMultipartResolver() {
	WebApplicationContext wac = WebApplicationContextUtils.getWebApplicationContext(getServletContext());
	String beanName = getMultipartResolverBeanName();
	if (wac != null && wac.containsBean(beanName)) {
		if (logger.isDebugEnabled()) {
			logger.debug("Using MultipartResolver '" + beanName + "' for MultipartFilter");
		}
		return wac.getBean(beanName, MultipartResolver.class);
	}
	else {
		return this.defaultMultipartResolver;
	}
}