org.springframework.beans.factory.annotation

Class BeanFactoryAnnotationUtils

java.lang.Object

org.springframework.beans.factory.annotation.BeanFactoryAnnotationUtils

public abstract class BeanFactoryAnnotationUtils
extends Object

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

Since:

3.1.2

Author:

Juergen Hoeller, Chris Beams

See Also:

BeanFactoryUtils

Constructor Summary

Constructors

Constructor and Description
BeanFactoryAnnotationUtils()

Method Summary

Modifier and Type	Method and Description
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.

Methods inherited from class java.lang.Object

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

Constructor Detail

BeanFactoryAnnotationUtils

public BeanFactoryAnnotationUtils()

Method Detail

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.

Parameters:

beanFactory - the BeanFactory to get the target bean from

beanType - the type of bean to retrieve

qualifier - the qualifier for selecting between multiple bean matches

Returns:

the matching bean of type T (never null)

Throws:

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

See Also:

BeanFactory.getBean(Class)

isQualifierMatch

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

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

Parameters:

qualifier - the qualifier to match

beanName - the name of the candidate bean

beanFactory - the BeanFactory from which to retrieve the named bean

Returns:

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)

Since:

5.0