How to find classes by annotation on classpath?

Question

On startup of a spring-boot application I want to perform a scan for all @Entitiy classes on the classpath.

Moreover, I'd like to filter any entities with a @CustomAnnotation.

I want to create some kind of auto configuration, and use the package of any entities found in:

EntityManagerFactoryBuilder
  .dataSource(ds)
  .packages(getPackages()))

But I don't want to explicit define the package there the appropriate entities are to be found, but find them on startup. Is that possible at all?

There is a utility scannotation which can assist, if you can use third parties — Kenneth Clark, Apr 09 '15 at 12:19
@Robertiano thanks, this seems to be a duplicate. Thus I voted byself to close accordingly. — membersound, Apr 09 '15 at 12:36

score 1 · Answer 1 · answered Apr 09 '15 at 12:18

1

I don't know the answer but in order to have the annotations on the compiled class files, they must be defined as follows @Retention(RetentionPolicy.RUNTIME)

answered Apr 09 '15 at 12:18

Fran Montero

1,601
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score 0 · Answer 2 · answered Apr 09 '15 at 12:17

0

You can use the java-reflections library to search for annotated classes, methods or classes extending another class across all loaded class files

answered Apr 09 '15 at 12:17

Rene8888

199
2
12

How to find classes by annotation on classpath?

2 Answers2