/// <summary>
/// Gets the field mapping used to resolve this field reference.
/// </summary>
public DataModelColumnAttribute GetFieldMapping(Type context)
{
var fmaps = DataModelMap.GetEntityMapping(context).FieldMappings;
if (FindFieldMappingKeyType == Data.FieldMappingKeyType.ClrMember)
{
return(fmaps[FieldName]);
}
foreach (var fld in fmaps)
{
if (fld.Value.ColumnName == FieldName)
{
return(fld.Value);
}
}
return(null);
}
/// <summary>
/// Prepares the
/// data to propagate to or from the <see cref="Entity"/> before
/// the Entity is retrieved or before data changes are made and/or saved.
/// </summary>
/// <param name="syncTo"></param>
public override void SynchronizeFields(SyncTo syncTo)
{
if (Type.IsDataModel() &&
Type == GetUnwrappedType(Type))
{
return;
}
switch (syncTo)
{
case SyncTo.FieldMappedData:
foreach (var field_kvp in EntityMappings.FieldMappings)
{
DataModelColumnAttribute field = field_kvp.Value;
// todo: optimize with cached Action<T>
// see: http://msmvps.com/blogs/jon_skeet/archive/2008/08/09/making-reflection-fly-and-exploring-delegates.aspx
if (field.TargetMember is FieldInfo)
{
object val = ((FieldInfo)field.TargetMember).GetValue(Entity);
object dval = this[field.TargetMember.Name];
if (((dval == null) != (val == null)) ||
(dval != null && !dval.Equals(val)))
{
this[field.TargetMember.Name] = val;
}
}
else if (field.TargetMember is PropertyInfo)
{
object val = ((PropertyInfo)field.TargetMember).GetValue(Entity, new object[] {});
if (val != null && !DataModelMap.TypeIsFieldMappable(val.GetType()))
{
if (DataModelMap.MapItems.ContainsKey(val.GetType()) &&
DataModelMap.GetEntityMapping(val.GetType()).PrimaryKeyColumns.Length == 1)
{
var map = DataModelMap.GetEntityMapping(val.GetType());
if (val is DataModel)
{
val =
((DataModel)val).ColumnMappedValue[
((DataModel)val).EntityMappings.PrimaryKeyColumns[0]];
}
else
{
val = val.GetType().GetProperty(
map.PrimaryKeyColumns[0]).GetValue(val, new object[] { });
}
}
}
object dval = InnerData.ContainsKey(field.TargetMember.Name)
? this[field.TargetMember.Name]
: null;
if (((dval == null) != (val == null)) ||
(dval != null && !dval.Equals(val)))
{
if (this.ModelData.ContainsKey(field.TargetMember.Name))
{
this[field.TargetMember.Name] = val;
}
else
{
var mapping = EntityMappings[field.TargetMember.Name];
if (mapping != null)
{
var name = mapping.TargetMember.Name;
if (this.ModelData.ContainsKey(name))
{
this[name] = val;
}
else if (this.ModelData.ContainsKey("field:" + mapping.ColumnName))
{
this["field:" + mapping.ColumnName] = val;
}
}
}
}
}
}
break;
case SyncTo.ClrMembers:
foreach (var field_kvp in EntityMappings.FieldMappings)
{
DataModelColumnAttribute field = field_kvp.Value;
// todo: optimize with cached Action<T>
// see: http://msmvps.com/blogs/jon_skeet/archive/2008/08/09/making-reflection-fly-and-exploring-delegates.aspx
if (field.TargetMember is FieldInfo)
{
object clrval = ((FieldInfo)field.TargetMember).GetValue(Entity);
object dicval = this[field.TargetMember.Name];
if (((clrval == null) != (dicval == null)) ||
(dicval != null && !dicval.Equals(clrval)))
{
((FieldInfo)field.TargetMember).SetValue(
Entity, this[field.TargetMember.Name]);
}
}
else if (field.TargetMember is PropertyInfo)
{
if (DataModelMap.TypeIsFieldMappable(field.TargetMemberType))
{
object propval = ((PropertyInfo)field.TargetMember).GetValue(Entity, new object[] {});
object dicval = this[field.TargetMember.Name];
if (dicval == DBNull.Value)
{
dicval = null;
}
if (((dicval == null) != (propval == null)) ||
(dicval != null && !dicval.Equals(propval)))
{
((PropertyInfo)field.TargetMember).SetValue(
Entity, dicval, new object[] {});
}
}
else
{
// todo maybe: assign loaded entity?
}
}
}
break;
}
}
private static DataModelMap GetMapping(Type t)
{
return(DataModelMap.GetEntityMapping(t));
}
internal ColumnMappedValueProperty(DataModel dataModel, DataModelMap mapping)
{
DataModel = dataModel;
Mapping = mapping;
}