Type Annotations on VariableElement

Type Annotations on VariableElement

    public static class SimpleEntityCodecFactoryTest {

        private Map<@JSON Integer,Map<@Frozen Integer,@Enumerated(value = Enumerated.Encoding.NAME, test = "123") String>> map;
    }
    
    final TypeElement typeElement = elementUtils.getTypeElement(SimpleEntityCodecFactoryTest.class.getCanonicalName());
    final List<VariableElement> els = ElementFilter.fieldsIn(typeElement.getEnclosedElements());
    
    final VariableElement mapElt = els.stream().filter(x -> x.getSimpleName().contentEquals("map")).findFirst().get();
    final com.sun.tools.javac.util.List<Attribute.TypeCompound> typeAttributes = ((Symbol.VarSymbol) mapElt).getMetadata().getTypeAttributes();
    for (Attribute.TypeCompound typeAttribute : typeAttributes) {
        final DeclaredType annotationType = typeAttribute.getAnnotationType();
        System.out.println(format("Accessing annotation '%s' at location : %s",annotationType.toString(),typeAttribute.getPosition().location));
        for (Map.Entry<Symbol.MethodSymbol,Attribute> entry : typeAttribute.getElementValues().entrySet()) {
            final Symbol.MethodSymbol methodSymbol = entry.getKey();
            final Attribute attribute = entry.getValue();
            System.out.println(format("Attribute '%s' for annotation '%s' : %s", methodSymbol.name, annotationType.toString(), attribute.toString()));
        }
    }    
    
    

Output display:

Accessing annotation 'info.archinnov.achilles.annotations.JSON' at location : TYPE_ARGUMENT(0)
Accessing annotation 'info.archinnov.achilles.annotations.Frozen' at location : TYPE_ARGUMENT(1),TYPE_ARGUMENT(0)
Accessing annotation 'info.archinnov.achilles.annotations.Enumerated' at location : TYPE_ARGUMENT(1),TYPE_ARGUMENT(1)
Attribute 'value' for annotation 'info.archinnov.achilles.annotations.Enumerated' : info.archinnov.achilles.annotations.Enumerated.Encoding.NAME
Attribute 'test' for annotation 'info.archinnov.achilles.annotations.Enumerated' : "123"