private bool CannotBeReversed(out QualifiedMember targetMember, out string reason)
{
if (ValueCouldBeSourceMember == false)
{
targetMember = null;
reason = $"configured value '{DataSourceLambda.GetDescription(ConfigInfo)}' is not a source member";
return(true);
}
if (ConfigInfo.HasCondition)
{
targetMember = null;
reason = $"configuration has condition '{ConfigInfo.GetConditionDescription()}'";
return(true);
}
if (!TargetMember.IsReadable)
{
targetMember = null;
reason = $"target member '{GetTargetDescription()}' is not readable, so cannot be used as a source member";
return(true);
}
if (!DataSourceLambda.TryGetSourceMember(out var sourceMemberLambda))
{
targetMember = null;
reason = $"configured value '{DataSourceLambda.GetDescription(ConfigInfo)}' is not a source member";
return(true);
}
targetMember = sourceMemberLambda.ToTargetMemberOrNull(
SourceType,
ConfigInfo.MapperContext,
out reason);
if (targetMember != null)
{
return(false);
}
var sourceMember = sourceMemberLambda.ToSourceMember(ConfigInfo.MapperContext);
var sourceMemberPath = sourceMember.GetFriendlySourcePath(ConfigInfo);
reason = $"source member '{sourceMemberPath}' is not a useable target member. {reason}";
return(true);
}
protected string GetDataSourceValueDescription()
{
var description = DataSourceLambda.GetDescription(ConfigInfo);
return(DataSourceLambda.IsSourceMember ? description : "'" + description + "'");
}