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(ConfigInfo)}'";
return(true);
}
if (!TargetMember.IsReadable)
{
targetMember = null;
reason = $"target member '{GetTargetMemberPath()}' is not readable, so cannot be used as a source member";
return(true);
}
if (!_dataSourceLambda.IsSourceMember(out var sourceMemberLambda))
{
targetMember = null;
reason = $"configured value '{_dataSourceLambda.GetDescription(ConfigInfo)}' is not a source member";
return(true);
}
targetMember = sourceMemberLambda.ToTargetMemberOrNull(
ConfigInfo.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);
}
private void ThrowIfSimpleSourceForNonSimpleTargetMember(Type targetMemberType)
{
if ((targetMemberType == typeof(object)) ||
targetMemberType.IsSimple() ||
!ConfiguredSourceType.IsSimple() ||
ConversionOperatorExists(targetMemberType) ||
_configInfo.HasTargetMemberMatcher())
{
return;
}
var sourceValue = (_customValueLambda != null)
? GetSourceValueDescription(_customValueLambda.Body)
: _customValueLambdaInfo.GetDescription(_configInfo);
throw new MappingConfigurationException(string.Format(
CultureInfo.InvariantCulture,
"{0} cannot be mapped to target type '{1}'",
sourceValue,
targetMemberType.GetFriendlyName()));
}