org.springframework.beans.factory.annotation

类 BeanFactoryAnnotationUtils

java.lang.Object

org.springframework.beans.factory.annotation.BeanFactoryAnnotationUtils

public abstract class BeanFactoryAnnotationUtils
extends Object

Convenience methods performing bean lookups related to Spring-specific annotations, for example Spring's @Qualifier annotation.

从以下版本开始:

3.1.2

作者:

Juergen Hoeller, Chris Beams

另请参阅:

BeanFactoryUtils

构造器概要

构造器

构造器和说明
BeanFactoryAnnotationUtils()

方法概要

限定符和类型	方法和说明
static boolean	isQualifierMatch(Predicate<String> qualifier, String beanName, BeanFactory beanFactory) Check whether the named bean declares a qualifier of the given name.
static <T> T	qualifiedBeanOfType(BeanFactory beanFactory, Class<T> beanType, String qualifier) Obtain a bean of type T from the given BeanFactory declaring a qualifier (e.g. via <qualifier> or @Qualifier) matching the given qualifier, or having a bean name matching the given qualifier.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

BeanFactoryAnnotationUtils

public BeanFactoryAnnotationUtils()

方法详细资料

qualifiedBeanOfType

public static <T> T qualifiedBeanOfType(BeanFactory beanFactory,
                                        Class<T> beanType,
                                        String qualifier)
                                 throws BeansException

Obtain a bean of type T from the given BeanFactory declaring a qualifier (e.g. via <qualifier> or @Qualifier) matching the given qualifier, or having a bean name matching the given qualifier.

参数:

beanFactory - the factory to get the target bean from (also searching ancestors)

beanType - the type of bean to retrieve

qualifier - the qualifier for selecting between multiple bean matches

返回:

the matching bean of type T (never null)

抛出:

NoUniqueBeanDefinitionException - if multiple matching beans of type T found

NoSuchBeanDefinitionException - if no matching bean of type T found

BeansException - if the bean could not be created

另请参阅:

BeanFactoryUtils.beanOfTypeIncludingAncestors(ListableBeanFactory, Class)

isQualifierMatch

public static boolean isQualifierMatch(Predicate<String> qualifier,
                                       String beanName,
                                       @Nullable
                                       BeanFactory beanFactory)

Check whether the named bean declares a qualifier of the given name.

参数:

qualifier - the qualifier to match

beanName - the name of the candidate bean

beanFactory - the factory from which to retrieve the named bean

返回:

true if either the bean definition (in the XML case) or the bean's factory method (in the @Bean case) defines a matching qualifier value (through <qualifier> or @Qualifier)

从以下版本开始:

5.0