java-design-patterns/service-layer/src/main/java/com/iluwatar/common/Dao.java

package com.iluwatar.common;

import java.util.List;

public interface Dao<E extends BaseEntity> {

	E find(Long id);
	
	void persist(E entity);
	
	E merge(E entity);
	
	void delete(E entity);
	
	List<E> findAll();
}