code: private Set<Class<?>> getClasses(XML xml){
  		HashSet<Class<?>> result = new HashSet<Class<?>>();
  		
  		// in case of override only the last global configuration must be analyzed
  		Global global = null;
  		
  		for (Class<?> clazz : getAllsuperClasses(configuredClass)) {
  			// only if global configuration is null will be searched global configuration on super classes
  			if(isNull(global)){
  				  
  				global = xml.loadGlobals().get(clazz.getName());
  				if(!isNull(global)){
  					addClasses(global.getClasses(),result);
  					if(global.getExcluded()!=null)
  						for (Attribute attribute : xml.loadAttributes().get(clazz.getName()))
  							for (String fieldName : global.getExcluded())
  								if(attribute.getName().equals(fieldName))
  									addClasses(attribute.getClasses(),result,attribute.getName());
  				}
  			}
  			
  			List<Attribute> attributes = xml.loadAttributes().get(clazz.getName());
  			
  			if(!isNull(attributes))
  				for (Attribute attribute : attributes)
  					if(    isNull(global) 
  						|| isPresent(global.getExcluded(), attribute.getName())
  					    || ( !isEmpty(global.getAttributes()) 
  						     && !isPresent(global.getAttributes(), new SimplyAttribute(attribute.getName()))
  						   )
  					   )
  					addClasses(attribute.getClasses(),result,attribute.getName());
  		}
  				
  		return result;
  	}
docs: Returns all Target Classes contained in the XML.
  @param xml xml to analyze
  @return target classes