Scanning Java Annotations at Runtime: Traversing the Classpath for Annotated Classes
In Java, annotations provide a powerful mechanism for adding metadata to classes, methods, and other program elements. By scanning the classpath at runtime, it becomes possible to identify and utilize these annotations for various purposes.
Search the Classpath for Annotated Classes
To scan the entire classpath for an annotated class, consider leveraging the org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider class. This provider offers fine-grained control over the scanning process, enabling you to specify base packages and filtering criteria.
Using the API
ClassPathScanningCandidateComponentProvider scanner = new ClassPathScanningCandidateComponentProvider(<includeDefaultFilters>);
scanner.addIncludeFilter(new AnnotationTypeFilter(<yourAnnotation>.class));
for (BeanDefinition bd : scanner.findCandidateComponents(<basePackage>)) { System.out.println(bd.getBeanClassName()); }
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