package com.sp.manager.util.common.service;
import java.util.List;
import org.springframework.transaction.annotation.Transactional;
import com.sp.manager.util.common.persistence.TreeDao;
import com.sp.manager.util.common.persistence.TreeEntity;
import com.sp.manager.util.common.utils.Reflections;
import com.sp.manager.util.common.utils.StringUtils;
/**
* Service基类
* @author
* @version 2014-05-16
*/
@Transactional(readOnly = true)
public abstract class TreeService<D extends TreeDao<T>, T extends TreeEntity<T>> extends CrudService<D, T> {
@Transactional(readOnly = false)
public void save(T entity) {
@SuppressWarnings("unchecked")
Class<T> entityClass = Reflections.getClassGenricType(getClass(), 1);
// 如果没有设置父节点,则代表为跟节点,有则获取父节点实体
if (entity.getParent() == null || StringUtils.isBlank(entity.getParentId())
|| "0".equals(entity.getParentId())){
entity.setParent(null);
}else{
entity.setParent(super.get(entity.getParentId()));
}
if (entity.getParent() == null){
T parentEntity = null;
try {
parentEntity = entityClass.getConstructor(String.class).newInstance("0");
} catch (Exception e) {
throw new ServiceException(e);
}
entity.setParent(parentEntity);
entity.getParent().setParentIds(StringUtils.EMPTY);
}
// 获取修改前的parentIds,用于更新子节点的parentIds
String oldParentIds = entity.getParentIds();
// 设置新的父节点串
entity.setParentIds(entity.getParent().getParentIds()+entity.getParent().getId()+",");
// 保存或更新实体
super.save(entity);
// 更新子节点 parentIds
T o = null;
try {
o = entityClass.newInstance();
} catch (Exception e) {
throw new ServiceException(e);
}
o.setParentIds("%,"+entity.getId()+",%");
List<T> list = dao.findByParentIdsLike(o);
for (T e : list){
if (e.getParentIds() != null && oldParentIds != null){
e.setParentIds(e.getParentIds().replace(oldParentIds, entity.getParentIds()));
preUpdateChild(entity, e);
dao.updateParentIds(e);
}
}
}
/**
* 预留接口,用户更新子节前调用
* @param childEntity
*/
protected void preUpdateChild(T entity, T childEntity) {
}
}