package com.javaniu.dao.impl;

import java.util.List;

import org.hibernate.Query;
import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;

import com.javaniu.dao.FileDao;
import com.javaniu.module.File;

@Transactional(readOnly = false, propagation = Propagation.SUPPORTS)
@Repository
public class FileDaoImpl extends BaseDaoImpl implements FileDao {

	@Override
	public void save(File file) {
		getSession().save(file);
	}

	@Override
	public void delete(Long id) {
		File file = findById(id);
		getSession().delete(file);
	}

	@Override
	public void delete(File file) {
		getSession().delete(file);
	}

	@Override
	public void update(File file) {
		getSession().update(file);
	}

	@Override
	public File findById(Long id) {
		return (File) getSession().get(File.class, id);
	}

	@Override
	public List<File> loadAll(int p, int ps) {
		String hql = "from File order by id desc";
		Query query = getSession().createQuery(hql);
		query.setFirstResult((p - 1) * ps);
		query.setMaxResults(ps);
		List<File> list = query.list();
		return list;
	}

	@Override
	public int countAll() {
		String hql = "select count(*) from File";
		Query query = getSession().createQuery(hql);
		return ((Number) query.uniqueResult()).intValue();
	}
}