/// <summary>
/// 获取数据实体
/// 如果数据实体不存在，返回null
/// </summary>
/// <param name="id"></param>
/// <returns></returns>
public DataEntityDev GetDataEntity(string id)
{
//首先尝试从缓存中获取
XElement cachingElement = (XElement)_cachingService.GetData(id);
string strEntity;
if (cachingElement == null)
{
string file = Path.Combine(Constant.PACKAGE_DATAENTITY_FOLDER, id);
bool fileExist = _packageService.Current.Container(file);
Debug.Assert(fileExist, "数据实体文件不存在");
if (fileExist == false)
{
return(null);
}
strEntity = _packageService.Current.GetFileContent(file);
XElement entityElement = XElement.Parse(strEntity);
_cachingService.Add(id, entityElement);
}
else
{
strEntity = cachingElement.ToString();
}
DataEntityDev dataEntity = new DataEntityDev(false);
dataEntity.FromXml(strEntity);
return(dataEntity);
}
/// <summary>
/// 更新数据实体
/// 实现方式是删除旧节点后重新添加，避免在这里再次操作XML具体内容
/// </summary>
/// <param name="dataEntity"></param>
public void Update(DataEntityDev dataEntity)
{
Debug.Assert(dataEntity != null, "dataEntity 为 null");
if (dataEntity == null)
{
return;
}
//更新索引信息
XElement element = _indexXml.XPathSelectElement(String.Format(XPATH_Index_SelectDataEntity, dataEntity.Id));
Debug.Assert(element != null, "更新数据实体索引时未找到指定数据实体的索引记录");
if (element != null)
{
element.ReplaceWith(ArchiveHelper.GetEntityArchiveIndex(dataEntity));
SaveIndexFile();
string xml = dataEntity.ToXml();
XElement xElement = XElement.Parse(xml);
//更新数据实体文件
_packageService.Current.AddFileContent(xml, Path.Combine(Constant.PACKAGE_DATAENTITY_FOLDER, dataEntity.Id));
_cachingService.Add(dataEntity.Id, xElement);
//发布事件
DataEntityEventArgs args = new DataEntityEventArgs(dataEntity);
_eventAggregator.GetEvent <DataEntityUpdatedEvent>().Publish(args);
}
}
//TODO:更名为remove
/// <summary>
/// 删除数据实体
/// </summary>
/// <param name="id"></param>
public void Delete(DataEntityDev dataEntity)
{
Debug.Assert(dataEntity != null, "dataEntity 为 null");
if (dataEntity == null)
{
return;
}
//移除索引信息
XElement element = _indexXml.XPathSelectElement(String.Format(XPATH_Index_SelectDataEntity, dataEntity.Id));
Debug.Assert(element != null, "删除数据实体索引时未找到指定数据实体的索引记录");
if (element != null)
{
element.Remove();
SaveIndexFile();
//移除数据实体文件
_packageService.Current.DeleteFile(Path.Combine(Constant.PACKAGE_DATAENTITY_FOLDER, dataEntity.Id));
_cachingService.Remove(dataEntity.Id);
//发布事件
DataEntityEventArgs args = new DataEntityEventArgs(dataEntity);
_eventAggregator.GetEvent <DataEntityRemovedEvent>().Publish(args);
}
}
/// <summary>
/// 添加一个数据实体
/// </summary>
/// <param name="dataEntity"></param>
public void Add(DataEntityDev dataEntity)
{
Debug.Assert(dataEntity != null, "dataEntity 为 null");
if (dataEntity == null)
{
return;
}
//添加索引信息
_indexXml.XPathSelectElement(XPATH_Index_DataEntity).Add(ArchiveHelper.GetEntityArchiveIndex(dataEntity));
SaveIndexFile();
string xml = dataEntity.ToXml();
XElement xElement = XElement.Parse(xml);
//添加数据实体文件
_packageService.Current.AddFileContent(xml, Path.Combine(Constant.PACKAGE_DATAENTITY_FOLDER, dataEntity.Id));
_cachingService.Add(dataEntity.Id, xElement);
//发布事件
DataEntityEventArgs args = new DataEntityEventArgs(dataEntity);
_eventAggregator.GetEvent <DataEntityAddedEvent>().Publish(args);
}
/// <summary>
/// 获取数据实体列表
/// </summary>
/// <returns></returns>
public List <DataEntity> GetDataEntityList()
{
XElement[] entityElements = _indexXml.XPathSelectElements(XPATH_Index_DataEntity_Entity).ToArray();
List <DataEntity> list = new List <DataEntity>();
foreach (XElement element in entityElements)
{
DataEntityDev entity = GetDataEntity(element.Attribute("Id").Value);
if (entity != null)
{
list.Add(entity);
}
}
return(list);
}
/// <summary>
/// 提交
/// 根据dataEntity的Id进行判断，如果已存在，调用update，如果不存在，调用add
/// </summary>
/// <param name="dataEntity"></param>
public void Commit(DataEntityDev dataEntity)
{
Debug.Assert(dataEntity != null, "dataEntity 为 null");
if (dataEntity == null)
{
return;
}
if (EntityExistById(dataEntity.Id))
{
Update(dataEntity);
}
else
{
Add(dataEntity);
}
}
/// <summary>
/// 事件订阅
/// </summary>
private void SubscribeEvent()
{
_eventAggregator.GetEvent <ProjectOpenedEvent>().Subscribe((e) =>
{
#region 初始化 IndexXml
//初始化 IndexXml
if (_packageService.Current.Container(Constant.PACKAGE_DATAENTITY_INDEX_FILE))
{
//读取当前数据实体索引信息
string strIndex = _packageService.Current.GetFileContent(Constant.PACKAGE_DATAENTITY_INDEX_FILE);
_indexXml = XElement.Parse(strIndex);
}
else
{
//如果当前不存在索引文件，创建一个
_indexXml = new XElement("Index", new XElement("DataEntity"));
SaveIndexFile();
}
#endregion
#region 首次打开的话创建预置数据实体
if (e.Project.ProjectSummary.FirstRun)
{
#region 创建枚举数据表
IDataBase dataBase = DataBaseProvide.Current;
//创建枚举表
DataEntityDev enumDataEntity = new DataEntityDev(Language.Current.DataEntity_Enum, "Enum", true);
enumDataEntity.Items.Add(
new DataItemEntityDev(enumDataEntity, Language.Current.DataEntity_Enum_Text, "Text", true, false, dataBase.CreateVarCharField(50)),
new DataItemEntityDev(enumDataEntity, Language.Current.DataEntity_Enum_Value, "Value", true, false, dataBase.CreateVarCharField(50)),
new DataItemEntityDev(enumDataEntity, Language.Current.DataEntity_Enum_EnumKey, "EnumKey", true, false, dataBase.CreateVarCharField(50)),
new DataItemEntityDev(enumDataEntity, Language.Current.DataEntity_Enum_Sort, "Sort", true, false, dataBase.CreateIntField())
);
Add(enumDataEntity);
#endregion
#region 创建用户数据表
//创建用户表
DataEntityDev userDataEntity = new DataEntityDev(Language.Current.DataEntity_User, "User", true);
//GroupId暂时允许为null
userDataEntity.Items.Add(
new DataItemEntityDev(userDataEntity, Language.Current.DataEntity_User_GroupId, "GroupId", true, true, dataBase.CreateIdField()),
new DataItemEntityDev(userDataEntity, Language.Current.DataEntity_User_Name, "Name", true, false, dataBase.CreateVarCharField(50)),
new DataItemEntityDev(userDataEntity, Language.Current.DataEntity_User_LoginName, "LoginName", true, false, dataBase.CreateVarCharField(50)),
new DataItemEntityDev(userDataEntity, Language.Current.DataEntity_User_Password, "Password", true, false, dataBase.CreateVarCharField(50)),
new DataItemEntityDev(userDataEntity, Language.Current.DataEntity_User_LastLoginTime, "LastLoginTime", true, true, dataBase.CreateSmallDatetimeField())
);
Add(userDataEntity);
#endregion
#region 创建用户组表
//创建用户组表
DataEntityDev userGroupDataEntity = new DataEntityDev(Language.Current.DataEntity_UserGroup, "UserGroup", true);
userGroupDataEntity.Items.Add(
new DataItemEntityDev(userGroupDataEntity, Language.Current.DataEntity_UserGroup_Name, "Name", true, false, dataBase.CreateVarCharField(50))
);
Add(userGroupDataEntity);
#endregion
}
#endregion
});
_eventAggregator.GetEvent <ProjectClosedEvent>().Subscribe((e) =>
{
//释放 IndexXml
_indexXml = null;
});
}
