public EntityPersister(InternalContext context)
{
this.context = context;
Database = context.Database;
entityQueryProvider = new EntityQueryProvider(context);
queryable = new QueryProvider(entityQueryProvider);
environment = context.Environment;
}
/// <summary>
/// 使用 <see cref="IDatabase"/> 对象初始化 <see cref="T:Lord.Data.Entity.EntityPersister`1"/> 类的新实例。
/// </summary>
/// <param name="database">一个 <see cref="IDatabase"/> 对象。</param>
public EntityPersister(IDatabase database)
{
Database = database;
context = new InternalContext(database);
entityQueryProvider = new EntityQueryProvider(context);
queryable = new QueryProvider(entityQueryProvider);
environment = context.Environment;
}
/// <summary>
/// 使用持久化环境进行分表配置。
/// </summary>
/// <param name="setupAction">对 <see cref="EntityPersistentEnvironment"/> 进行配置的方法。</param>
/// <returns></returns>
public EntityContextOptionsBuilder UseEnvironment(Action <EntityPersistentEnvironment> setupAction)
{
var environment = new EntityPersistentEnvironment();
setupAction?.Invoke(environment);
Options.Initializers.Add <EnvironmentPreInitializer>(s => s.Environment = environment);
return(this);
}
/// <summary>
/// 使用实例名初始化 <see cref="T:Lord.Data.Entity.EntityPersister`1"/> 类的新实例。
/// </summary>
/// <param name="instanceName">实例名。</param>
public EntityPersister(string instanceName = null)
{
metadata = EntityMetadataUnity.GetEntityMetadata(GetEntityType());
context = new InternalContext(instanceName);
Database = context.Database;
entityQueryProvider = new EntityQueryProvider(context);
queryable = new QueryProvider(entityQueryProvider);
entityQueryProvider.InitializeInstanceName(instanceName);
environment = context.Environment;
}
/// <summary>
/// 如果对象实现了 <see cref="IEntityPersistentEnvironment"/> 接口，则会将 <paramref name="environment"/> 附加到该对象；
/// </summary>
/// <param name="item"></param>
/// <param name="environment"></param>
internal static T InitializeEnvironment <T>(this T item, EntityPersistentEnvironment environment)
{
if (item == null)
{
return(default(T));
}
item.As <IEntityPersistentEnvironment>(e =>
{
if (environment != null)
{
e.Environment = environment;
}
});
return(item);
}
/// <summary>
/// 初始化 <see cref="EntityPersisterHelper"/> 类的新实例。
/// </summary>
/// <param name="database">提供给持久化操作的 <see cref="Database"/> 对象。</param>
/// <param name="entityType">实体的类型。</param>
/// <param name="environment">实体持久化环境对象。</param>
public EntityPersisterHelper(IDatabase database, Type entityType, EntityPersistentEnvironment environment)
{
this.database = database;
this.entityType = entityType;
this.environment = environment;
}