/// <summary>
/// 获取指定属性的值。
/// </summary>
/// <param name="property">实体属性。</param>
/// <returns></returns>
public virtual PropertyValue GetValue(IProperty property)
{
if (property == null)
{
return(PropertyValue.Empty);
}
var hasValue = InnerEntry.Has(property.Name);
var value = PropertyValue.Empty;
if (hasValue)
{
value = InnerEntry[property.Name].GetCurrentValue();
}
else if (property.Type.IsValueType)
{
value = PropertyValue.NewValue(property.Type.GetDefaultValue(), property.Type);
}
//关联属性
if (!hasValue && property is RelationProperty)
{
value = ProcessSupposedProperty(property);
}
return(EntityUtility.CheckReturnValue(property, value));
}
/// <summary>
/// 设置指定属性的值。
/// </summary>
/// <param name="property">实体属性。</param>
/// <param name="value">要设置的值。</param>
public virtual void SetValue(IProperty property, PropertyValue value)
{
//如果赋值相同则忽略更改
if (CheckValueEquals(property, value, out PropertyValue oldValue))
{
return;
}
//验证属性值
//ValidationUnity.Validate(this, property, value);
EntityUtility.CheckPrimaryProperty(this, property);
if (CheckPropertyChangingIsCanceled(property, value, oldValue))
{
return;
}
CheckEntitySetDestroy(property, oldValue, value);
InternalSetValue(property, value);
EntityUtility.UpdateFromReference(property, this, value);
this.As <IEntityRelation>(s => s.NotifyModified(property.Name));
if (PropertyChanged != null)
{
OnPropertyChanged(new PropertyChangedEventArgs(property, oldValue, value));
}
}
/// <summary>
/// 将关联属性的值设为 null。
/// </summary>
/// <param name="property"></param>
private bool SetNullable(IProperty property)
{
var relationPro = property.As <RelationProperty>();
if (relationPro == null)
{
return(false);
}
var oldValue = CheckAndLazyPropertyValue(property);
if (oldValue == null)
{
return(false);
}
switch (relationPro.RelationalPropertyType)
{
case RelationPropertyType.Entity:
EntityUtility.SetEntityToNull(oldValue);
break;
case RelationPropertyType.EntitySet:
EntityUtility.SetEntitySetToNull(oldValue);
break;
}
return(true);
}
private void UpdateRelations(IEntity entity)
{
var entityEx = entity.As <IEntityStatefulExtension>();
if (entityEx == null)
{
return;
}
var relProperties = PropertyUnity.GetRelatedProperties(entity.EntityType);
foreach (var property in relProperties)
{
var relationPro = property as RelationProperty;
var value = entityEx.GetDirectValue(property);
if (value == null)
{
continue;
}
switch (relationPro.RelationPropertyType)
{
case RelationPropertyType.EntitySet:
var list = PropertyValueHelper.GetValue <IEnumerable>(value);
EntityUtility.AttachPrimaryKeyValues(entity, relationPro, list);
Save(list);
break;
case RelationPropertyType.Entity:
SaveRelationEntity(PropertyValueHelper.GetValue <IEntity>(value));
break;
}
}
}
