/// <summary>
/// Gets the conflicts.
/// </summary>
/// <param name="obj">The obj.</param>
/// <returns>A <see cref="Zonkey.Conflict"/> array.</returns>
public Conflict[] GetConflicts(T obj)
{
ISavable objSV = obj as ISavable;
if (objSV == null)
{
throw new ArgumentException("GetConflicts() is only supported on classes that implement Zonkey.ObjectModel.ISavable", "obj");
}
FieldValuesDictionary dbValues;
DbCommand command = CommandBuilder.GetRequeryCommand(objSV);
using (DbDataReader reader = ExecuteReaderInternal(command, CommandBehavior.SingleRow))
{
if (reader.Read())
{
dbValues = new FieldValuesDictionary(reader);
}
else
{
throw new DataException("DataReader returned could not read a record to sync with.");
}
}
List <Conflict> conflicts = new List <Conflict>();
foreach (KeyValuePair <string, object> original in objSV.OriginalValues)
{
PropertyInfo pi = _objectType.GetProperty(original.Key);
if (pi == null)
{
continue;
}
IDataMapField field = DataMap.GetFieldForProperty(pi);
if ((field == null) || (field.AccessType == AccessType.ReadOnly))
{
continue;
}
bool valueMatch = false;
object oDbValue;
if (dbValues.TryGetValue(field.FieldName, out oDbValue))
{
if (IsNullOrDbNull(original.Value) || IsNullOrDbNull(oDbValue))
{
valueMatch = (IsNullOrDbNull(original.Value) && IsNullOrDbNull(oDbValue));
}
else
{
Type propType = original.Value.GetType();
if (propType.IsGenericType)
{
// special case to handle nullable types
Type baseType = Nullable.GetUnderlyingType(propType);
if (baseType != null)
{
propType = baseType;
}
}
if (propType.IsEnum)
{
propType = Enum.GetUnderlyingType(propType);
}
if (!propType.IsAssignableFrom(oDbValue.GetType()))
{
if ((propType == typeof(Guid)) && (oDbValue is string))
{
if (!string.IsNullOrEmpty(oDbValue.ToString()))
{
valueMatch = original.Value.Equals(new Guid(oDbValue.ToString()));
}
}
else
{
valueMatch = original.Value.Equals(Convert.ChangeType(oDbValue, propType));
}
}
else
{
valueMatch = original.Value.Equals(oDbValue);
}
}
}
else
{
throw new DataException(string.Format("Missing field '{0}' from db sync query", field.FieldName));
}
if (!valueMatch)
{
conflicts.Add(new Conflict(field.Property.Name, original.Value, oDbValue, field.Property.GetValue(objSV, null)));
}
}
return(conflicts.ToArray());
}
