internal static void UpdateFromReference(IProperty property, IEntity entity, PropertyValue value)
{
var relationPro = property.As <RelationProperty>();
if (relationPro == null || value.IsNullOrEmpty() ||
relationPro.RelationPropertyType != RelationPropertyType.Entity)
{
return;
}
var refEntity = value.GetStorageValue().As <IEntity>();
var relationKey = RelationshipUnity.GetRelationship(relationPro);
if (relationKey == null)
{
return;
}
IEntity descEntity;
IEntity sourceEntity;
if (relationKey.Style == RelationshipStyle.One2Many)
{
descEntity = entity;
sourceEntity = refEntity;
}
else
{
descEntity = refEntity;
sourceEntity = entity;
}
foreach (var key in relationKey.Keys)
{
descEntity.InternalSetValue(key.OtherProperty, sourceEntity.InternalGetValue(key.ThisProperty));
}
}
/// <summary>
/// 清空并标识，将删除实体集中的所有对象。
/// </summary>
/// <param name="value"></param>
internal static void SetEntitySetToNull(PropertyValue value)
{
if (value.IsNullOrEmpty())
{
return;
}
value.GetStorageValue().As <IEntitySetInternalExtension>(e => e.IsNeedClear = true);
}
/// <summary>
/// 改为移除状态，确定该该实体删除。
/// </summary>
/// <param name="value"></param>
internal static void SetEntityToNull(PropertyValue value)
{
if (value.IsNullOrEmpty())
{
return;
}
value.GetStorageValue().As <IEntity>(entity => entity.SetState(EntityState.Detached));
}
internal static object GetValueSafely(PropertyValue value)
{
if (value == null || value.IsEmpty)
{
return(null);
}
return(value.GetStorageValue());
}
/// <summary>
/// 检查关联属性的空值，如果属性值已设置为null，则不应显示给客户端。
/// </summary>
/// <param name="property">要检查的属性。</param>
/// <param name="value">属性的值。</param>
/// <returns></returns>
internal static PropertyValue CheckReturnValue(IProperty property, PropertyValue value)
{
var relationPro = property.As <RelationProperty>();
if (relationPro == null || value.IsNullOrEmpty())
{
return(value);
}
switch (relationPro.RelationPropertyType)
{
case RelationPropertyType.Entity:
return(CheckReturnEntityValue(value.GetStorageValue().As <IEntity>(), value));
case RelationPropertyType.EntitySet:
return(CheckReturnEntitySetValue(value.GetStorageValue().As <IEntitySetInternalExtension>(), value));
default:
return(value);
}
}
/// <summary>
/// 检查 EntitySet 里的元素是还被销毁。
/// </summary>
/// <param name="property"></param>
/// <param name="oldValue"></param>
/// <param name="newValue"></param>
/// <returns></returns>
private bool CheckEntitySetDestroy(IProperty property, PropertyValue oldValue, PropertyValue newValue)
{
if (!property.Is <EntitySetProperty>())
{
return(false);
}
if (oldValue == null || oldValue.IsNullOrEmpty())
{
oldValue = ProcessSupposedProperty(property);
}
if (oldValue != null && !oldValue.IsNullOrEmpty() && !newValue.IsNullOrEmpty())
{
var oldSet = oldValue.GetStorageValue() as IEntitySetInternalExtension;
oldSet.As <IList>(s => s.Clear());
var newSet = newValue.GetStorageValue() as IEntitySetInternalExtension;
newSet.ShiftDetachedList(oldSet);
return(true);
}
return(false);
}
public override void SetValue(IProperty property, PropertyValue value)
{
base.SetValue(property, value);
property.Info.ReflectionInfo.SetValue(this, value.GetStorageValue(), null);
}
