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

package com.iluwatar.servicelayer.common;

import java.util.List;

/**
 * 
 * Dao interface.
 *
 * @param <E>
 * 
 */
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();
}