private static DbContextInitializerBase CreateInitializer(DbContextInitializerConfig config)
{
Type initializerType = config.InitializerType;
DbContextInitializerBase initializer = Activator.CreateInstance(initializerType) as DbContextInitializerBase;
if (initializer == null)
{
throw new InvalidOperationException(Resources.DatabaseInitializer_TypeNotDatabaseInitializer.FormatWith(initializerType));
}
foreach (Assembly mapperAssembly in config.EntityMapperAssemblies)
{
if (initializer.MapperAssemblies.Contains(mapperAssembly))
{
continue;
}
initializer.MapperAssemblies.Add(mapperAssembly);
}
dynamic dynamicInitializer = initializer;
if (config.CreateDatabaseInitializerType != null)
{
dynamic createDatabaseInitializer = Activator.CreateInstance(config.CreateDatabaseInitializerType);
dynamicInitializer.CreateDatabaseInitializer = createDatabaseInitializer;
}
return((DbContextInitializerBase)dynamicInitializer);
}
/// <summary>
/// 初始化一个<see cref="DbContextConfig"/>类型的新实例
/// </summary>
internal DbContextConfig(ContextElement element)
{
Name = element.Name;
Enabled = element.Enabled;
DataLoggingEnabled = element.DataLoggingEnabled;
ConnectionStringName = element.ConnectionStringName;
ContextType = Type.GetType(element.ContextTypeName);
InitializerConfig = new DbContextInitializerConfig(element.DbContextInitializer);
}
/// <summary>
/// 获取或设置 实体映射程序集查找器
/// 必须在配置文件中指定MapperAssembly，暂时不启用“生成默认配置文件”
/// </summary>
//public IEntityMapperAssemblyFinder MapperAssemblyFinder { get; set; }
/// <summary>
/// 开始初始化数据上下文
/// </summary>
/// <param name="config">数据库配置信息</param>
public virtual void Initialize(DbContextInitializerConfig config)
{
DbContextInitializerBase initializer = CreateInitializer(config);
DbContextManager.Instance.RegisterInitializer(initializer);
}
