Is there any way to change the annotation parameter using Spring AOP? I have some hibernate annotation with static value and i have to change this value in runtime, Since there is no other way, i am trying to use AOP to change the annotation parameter. Is that possible?
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Is there an existing Spring org.springframework.core.type.filter.TypeFilter implementation for Method annotations?
I am looking to call ClassPathScanningCandidateComponentProvider#findCandidateComponents in order got get all of the components that have an annotation or inherited annotations so I can validate the state of the configuration supports the annotation attribute values.
There is an org.springframework.core.type.filter.AnnotationTypeFilter, is there a similar implementation but getting classes that have methods that are annotated with the annotation?
If not is there a mechanism to search for components with methods with a specified annotation?
I downloaded the spring-framework project, because I want to see how #Autowired is implemented.
So, I got to this file, which is an interface.
But when I want in Intellij to go to its implementation, no implementations are found.
So is this interface not implemented?
Then where is the code for #Autowired?
Well, this is not an interface it is actually an annotation.
In java #inteface is used to create an annotation.
Once the annotation is created, you can use that annotation on fields, classes, methods (based on what is specified in #Target of the annotation definition.
Spring does package scanning and finds all the things which are using a particular annotation and does the required processing.
Use this article to undestand more in How an annotation is created, used and the how the annotation processor finds and processes the annotation.
#Autowired doesn't really have much code, so to speak. It's just an annotation which is a Java type of interface that provides instructions to other parts of the codebase.
#Autowired is only an annotation or you can say a "marker". Spring use reflection to identify annotation and do something about that annotated thing. For example with #Autowired, when spring found it, spring will inject the annotated property with eligible bean.
I'd like to use #Valid annotation to validate my beans in controller method. Unfortunatelly it does not work. I know that in order to make it work I'd have to include spring-mvc into my project and put there mvc:annotation-driven or #EnableMvc... .
But I do not use spring-mvc! I use Wicket framework. How to make #Valid working without incorporating spring-mvc?
Thanks!
#Valid is not specific to spring it is an implementation of JSR 303 bean validation. You can use any other reference implementation or write your own. e.g Apache and Hibernate Validator has reference implementation available. Take a look at this answer Is there an implementation of JSR-303 (bean validation) available?
What is the equivalent of Guice's #ImplementedBy annotation in Spring DI? (I googled it but with no results.)
There is not exist JIT default binding in Spring. You can set only one implementation to dependency or use naming qualifier #Named or #Qualifier annotation to specify implementation but this is static binding (not equivalent to #ImplementedBy Guice implementation).
I created a spring extension enabling the jit-binding. this library add #ImplementedBy annotation to Spring. See https://github.com/devacfr/spring-implementedby and give me feedback
You can use the annotation #Qualifier
http://static.springsource.org/spring-framework/docs/3.2.0.M2/api/org/springframework/beans/factory/annotation/Qualifier.html
In struts2 i almost did not use any xml configs and used much of annotations for MVC. I build a small application in that way using struts2. Now i want to develop same project using spring 3.2. Now i want to use annotation to create beans and request mapping (this i used). I want a clear example of using bean annotations and is it possible to set properties using annotations. I am getting confused because the documentation is too large, and many annotations. providing a simple list of annotations and their usage with simple example will be a great help.
Iam doing sample project on Spring 3.1.
I have used some annotations to create beans.Below are the annotations i have used.
#Component - Annotation used to create a bean given by Spring
#Resource,#Bean
JSR Annotations: #Controller,#Repository, #Service
If you are annotating your class with above annotations Spring Container will create beans for you.
Your properties will be set with help of #Autowired annotation.