Make spring support like CDI @Produces (for Array/Map/Collection inject) [SPR-11269]

[spring-projects-issues]

zhangkaitao opened SPR-11269 and commented

cdi support like

 
@Produces
List<Conference> availableConfs;

see http://my.oschina.net/hantsy/blog/186939

because spring implement array/collection/map inject use find Component bean then add to array/collection/map。Can simple modify DefaultListableBeanFactory to support。please see 864 line：
https://github.com/zhangkaitao/spring4-showcase/blob/master/spring4-others/src/test/java/org/springframework/beans/factory/support/DefaultListableBeanFactory.java

1、find like List<BeanInterface> bean;
2、find BeanInterface bean，add to List；
3、others;

example：
https://github.com/zhangkaitao/spring4-showcase/blob/master/spring4-others/src/test/java/com/sishuok/spring4/genericinject/GenericInjectTest.java

only support java config way，if want support xml,need modify bean definition(add ResolvableType else collection class)

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Affects: 4.0 GA

Issue Links:

• Allow for normal bean wiring semantics for types assignable to Map [SPR-7915] #12570 Allow for normal bean wiring semantics for types assignable to Map ("duplicates")
• @Autowired does not work for target bean of type Collection [SPR-12180] #16794 @Autowired does not work for target bean of type Collection ("duplicates")
• Cannot inject List<String> even using @Named [SPR-13585] #18162 Cannot inject List even using @Named ("duplicates")

[spring-projects-issues]

Gaurav Rawat commented

This will be pretty cool if we can have CDI @produces support specially for injecting methods .

[spring-projects-issues]

Juergen Hoeller commented

This is more or less a duplicate of our 4.3 work towards refining our injection matching algorithm. We do it using Spring's common annotation style (@Bean etc), simply allowing to match beans which are collections themselves now. This is functionally equivalent to CDI's @Produces, just bound to factory methods and naturally integrated with all of Spring's other matching options.

Please give a recent 4.3.0.BUILD-SNAPSHOT a try there. RC1 is coming up in late March.

Juergen

[spring-projects-issues]

Gaurav Rawat commented

OK @bean note works on non configuration classes now great. Let me give it a try . thanks