JarCastingbean-metadata 
It is the simple library, that helps you to collect metadata of the java-beans. jACH project is built on top of this framework, so there you can find the best example of use
Add bean-metadata to your project. for maven projects just add this dependency:
<dependency>
<groupId>com.afrunt</groupId>
<artifactId>bean-metadata</artifactId>
<version>0.4</version>
</dependency>
The easiest usage scenario is to collect metadata from one bean using BasicMetadataCollector
BasicMetadataCollector metadataCollector = new BasicMetadataCollector();
BeanMetadata<FieldMetadata> beanMetadata = metadataCollector.collectBeanMetadata(Bean.class);
assertTrue(beanMetadata.isAnnotatedWith(TypeAnnotation.class));
assertEquals(2, beanMetadata.getFieldsMetadata().size());
assertEquals("bean", beanMetadata.getAnnotation(TypeAnnotation.class).value());
assertTrue(beanMetadata.hasField("id"));
assertTrue(beanMetadata.hasField("value"));
FieldMetadata id = beanMetadata.getFieldMetadata("id");
assertTrue(id.isAnnotatedWithAll(FieldAnnotation.class, AnotherFieldAnnotation.class));
assertTrue(id.isString());
You can collect the metadata from collection of beans
BasicMetadataCollector metadataCollector = new BasicMetadataCollector();
Metadata<BeanMetadata<FieldMetadata>, FieldMetadata> metadata = metadataCollector.collectMetadata(BEANS);
But the most flexible scenario is to extend the MetadataCollector and types of metadata
public class BasicMetadataCollector extends MetadataCollector<Metadata<BeanMetadata<FieldMetadata>, FieldMetadata>, BeanMetadata<FieldMetadata>, FieldMetadata> {
@Override
protected Metadata<BeanMetadata<FieldMetadata>, FieldMetadata> newMetadata() {
return new Metadata<>();
}
@Override
protected BeanMetadata<FieldMetadata> newBeanMetadata() {
return new BeanMetadata<>();
}
@Override
protected FieldMetadata newFieldMetadata() {
return new FieldMetadata();
}
}