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package lombok.core;
import java.lang.annotation.Annotation;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
public class SpiLoadUtil {
private SpiLoadUtil() {}
@SuppressWarnings("unchecked")
public static Class<? extends Annotation> findAnnotationClass(Class<?> c, Class<?> base) {
if ( c == Object.class || c == null ) return null;
for ( Type iface : c.getGenericInterfaces() ) {
if ( iface instanceof ParameterizedType ) {
ParameterizedType p = (ParameterizedType)iface;
if ( !base.equals(p.getRawType()) ) continue;
Type target = p.getActualTypeArguments()[0];
if ( target instanceof Class<?> ) {
if ( Annotation.class.isAssignableFrom((Class<?>) target) ) {
return (Class<? extends Annotation>) target;
}
}
throw new ClassCastException("Not an annotation type: " + target);
}
}
Class<? extends Annotation> potential = findAnnotationClass(c.getSuperclass(), base);
if ( potential != null ) return potential;
for ( Class<?> iface : c.getInterfaces() ) {
potential = findAnnotationClass(iface, base);
if ( potential != null ) return potential;
}
return null;
}
}
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