import java.util.LinkedList;
import java.util.List;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.type.filter.AnnotationTypeFilter;
import org.springframework.web.context.support.StandardServletEnvironment;

public class Detector {

	private static final Logger LOGGER = LoggerFactory.getLogger(Detector.class);

	public Class<?>[] findAllConfigurationClassesInPackage(String packageName) {
		final List<Class<?>> result = new LinkedList<Class<?>>();
		final ClassPathScanningCandidateComponentProvider provider = new ClassPathScanningCandidateComponentProvider(
				true, new StandardServletEnvironment());
		provider.addIncludeFilter(new AnnotationTypeFilter(Configuration.class));
		for (BeanDefinition beanDefinition : provider
				.findCandidateComponents(packageName)) {
			try {
				result.add(Class.forName(beanDefinition.getBeanClassName()));
			} catch (ClassNotFoundException e) {
				LOGGER.warn(
						"Could not resolve class object for bean definition", e);
			}
		}
		return result.toArray(new Class<?>[result.size()]);
	}
}