package cn.xiaojf;

import cn.xiaojf.today.data.rdb.repository.RdbCommonRepositoryImpl;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.orm.jpa.vendor.HibernateJpaSessionFactoryBean;

@SpringBootApplication
@EnableJpaRepositories(repositoryBaseClass = RdbCommonRepositoryImpl.class)
public class Application {
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }

    @Bean
    public HibernateJpaSessionFactoryBean sessionFactory() {
        return new HibernateJpaSessionFactoryBean();
    }
}

spring.jpa.show-sql = true
spring.jpa.hibernate.ddl-auto=none
spring.jpa.database=mysql
spring.jpa.properties.hibernate.current_session_context_class=org.springframework.orm.hibernate4.SpringSessionContext

@Autowired
private SessionFactory sessionFactory;

package cn.xiaojf.today.base.service.impl;

import cn.xiaojf.today.base.constant.SystemConstant;
import cn.xiaojf.today.base.service.EntityService;
import cn.xiaojf.today.base.util.Asserts;
import cn.xiaojf.today.base.util.BeanUtil;
import cn.xiaojf.today.base.util.DaoUtil;
import cn.xiaojf.today.base.util.StringUtil;
import cn.xiaojf.today.data.rdb.entity.AbstractEntity;
import cn.xiaojf.today.data.rdb.entity.BaseEntity;
import cn.xiaojf.today.data.rdb.util.EntityUtil;
import org.apache.commons.beanutils.BeanUtils;
import org.apache.commons.lang.StringUtils;
import org.hibernate.Criteria;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.criterion.Example;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import javax.validation.constraints.NotNull;
import java.io.Serializable;
import java.lang.reflect.InvocationTargetException;
import java.util.ArrayList;
import java.util.List;

/**
 * @author xiaojf 2017/2/24 11:06.
 */
@Service
@Transactional
public class EntityServiceImpl implements EntityService {
    @Autowired
    private SessionFactory sessionFactory;


    @Override
    public <T extends BaseEntity> boolean checkFieldRepeat(T entity, String fieldName) throws Exception{
        String id = StringUtil.toString(BeanUtils.getProperty(entity, "id"));
        Serializable filedValue = http://www.mamicode.com/StringUtil.toString(BeanUtils.getProperty(entity, fieldName));

        BaseEntity baseEntity = entity.getClass().newInstance();
        BeanUtils.setProperty(baseEntity, fieldName, filedValue);
        List list = this.findByExample(baseEntity);

        if (list != null && list.size() > 0) {
            Object o = list.get(0);
            String existId = BeanUtils.getProperty(o, "id");
            if (existId.equals(id)) {
                return false;
            } else {
                return true;
            }
        }
        return false;
    }

    @Override
    public <T extends BaseEntity> void saveOrUpdate(T entity) throws IllegalAccessException, NoSuchMethodException, InvocationTargetException {
        String id = BeanUtils.getProperty(entity, SystemConstant.TABLE_ID);
        Session session = this.getSession();
        if(! StringUtils.isBlank(id)) {//更新操作
            T origion = this.get(entity.getClass(),id);
            BeanUtil.copyPropertiesIgnoreNull(entity, origion);
            DaoUtil.generateDefaultField(origion); //追加部分字段默认值
            session.update(origion);
        } else { //新增
            DaoUtil.generateDefaultField(entity); //追加部分字段默认值
            session.save(entity);
        }
    }

    @Override
    public <T extends BaseEntity> void saveOrUpdate(List<T> list) throws Exception {
        Asserts.notNull(list);
        for (T t : list) {
            getSession().saveOrUpdate(t);
        }
    }

    @Override
    public void enable(Class clazz, List<String> ids) throws Exception {
        List<BaseEntity> list = get(clazz, ids);
        for (BaseEntity t : list) {
            BeanUtils.setProperty(t, "status", AbstractEntity.STATUS_ENABLED);
        }

        saveOrUpdate(list);
    }

    @Override
    public void disable(Class clazz, List<String> ids) throws Exception {
        List<BaseEntity> list = get(clazz, ids);
        for (BaseEntity t : list) {
            BeanUtils.setProperty(t, SystemConstant.TABLE_STATUS, AbstractEntity.STATUS_DISABLED);
        }

        saveOrUpdate(list);
    }

    @Override
    public <T extends BaseEntity> T get(Class clazz ,Serializable id) {
        if (id == null) {
            return null;
        }

        return (T) this.getSession().get(clazz, id);
    }

    @Override
    public <T extends BaseEntity> List<T> get(Class clazz, List<String> ids) {
        Asserts.notNull(ids, "主键不能为空");
        List<T> list = new ArrayList<T>();
        for (String id : ids) {
            T t = get(clazz, id);
            list.add(t);
        }
        return list;
    }


    @Override
    public void logDelById(Class clazz, String id) throws InvocationTargetException, IllegalAccessException, NoSuchMethodException {
        Asserts.notNull(id);
        Asserts.notNull(clazz);
        BaseEntity entity = get(clazz, StringUtil.toString(id));
        if (entity != null) {
            BeanUtils.setProperty(entity, SystemConstant.TABLE_STATUS, AbstractEntity.STATUS_LOGDEL);
        }
        this.saveOrUpdate(entity);
    }

    @Override
    public void logDelById(Class clazz, List<String> ids) throws Exception {
        List<BaseEntity> list = get(clazz, ids);
        for (BaseEntity t : list) {
            BeanUtils.setProperty(t, SystemConstant.TABLE_STATUS, AbstractEntity.STATUS_LOGDEL);
        }

        saveOrUpdate(list);
    }

    private <T extends BaseEntity> List<T> findByExample(@NotNull T example) {
        Session session = this.sessionFactory.openSession();
        Criteria criteria = session.createCriteria(example.getClass());

        if (example != null) {
            criteria.add(Example.create(example));
        }
        List list = criteria.list();
        session.close();
        return list;
    }

    /**
     * 获取Session
     *
     * @return Session
     * @author xiaojf  2015-5-9 8:35:08
     */
    private Session getSession() {
        return this.sessionFactory.getCurrentSession();
    }
}