private Expression GetCondition(Expression enumerableAccess, EnumerableTypeHelper helper)
{
var enumerableCheck = HasMetaMemberPart.GetEnumerableCountCheck(enumerableAccess, helper);
if (MapperData.RuleSet.Settings.GuardAccessTo(enumerableAccess))
{
enumerableCheck = Expression.AndAlso(
enumerableAccess.GetIsNotDefaultComparison(),
enumerableCheck);
}
return(enumerableCheck);
}
public static bool TryCreateFor(IMemberMapperData mapperData, ref MetaMemberPartBase metaMemberPart)
{
if (!mapperData.TargetMember.IsSimple)
{
return(false);
}
if (!mapperData.CanConvert(typeof(bool), mapperData.TargetMember.Type))
{
return(false);
}
metaMemberPart = new HasMetaMemberPart(mapperData);
return(true);
}
private static bool TryGetMetaMember(
IList <string> memberNameParts,
DataSourceFindContext context,
out MetaMemberPartBase metaMember)
{
var currentMappingData = default(IObjectMappingData);
var currentSourceMember = default(IQualifiedMember);
var currentTargetMember = default(QualifiedMember);
var currentMemberPart = metaMember = default(MetaMemberPartBase);
Func <IQualifiedMember, QualifiedMember, IObjectMappingData, DataSourceFindContext, IObjectMappingData> currentMappingDataFactory =
(sm, tm, md, c) => c.ChildMappingData.Parent;
for (var i = memberNameParts.Count - 1; i >= 0; --i)
{
var memberNamePart = memberNameParts[i];
switch (memberNamePart)
{
case HasMetaMemberPart.Name:
if (HasMetaMemberPart.TryCreateFor(context.MapperData, ref currentMemberPart))
{
break;
}
return(false);
case FirstMetaMemberPart.Name:
currentMemberPart = new FirstMetaMemberPart(context.MapperData);
break;
case LastMetaMemberPart.Name:
currentMemberPart = new LastMetaMemberPart(context.MapperData);
break;
case CountMetaMemberPart.Name:
if (CountMetaMemberPart.TryCreateFor(context.MapperData, ref currentMemberPart))
{
break;
}
return(false);
case NumberOfMetaMemberPart.Name:
if (NumberOfMetaMemberPart.TryCreateFor(context.MapperData, ref currentMemberPart))
{
break;
}
return(false);
default:
currentMappingData = currentMappingDataFactory.Invoke(
currentSourceMember,
currentTargetMember,
currentMappingData,
context);
var currentMapperData = currentMappingData.MapperData;
var matchingTargetMember = GlobalContext.Instance
.MemberCache
.GetTargetMembers(currentMapperData.TargetType)
.FirstOrDefault(m => m.Name == memberNamePart);
if (matchingTargetMember == null)
{
matchingTargetMember = GlobalContext.Instance
.MemberCache
.GetSourceMembers(currentMapperData.SourceType)
.FirstOrDefault(m => m.Name == memberNamePart);
if (matchingTargetMember == null)
{
return(false);
}
}
currentTargetMember = currentMapperData.TargetMember.Append(matchingTargetMember);
var childMemberMapperData = new ChildMemberMapperData(currentTargetMember, currentMapperData);
var memberMappingData = currentMappingData.GetChildMappingData(childMemberMapperData);
currentSourceMember = SourceMemberMatcher.GetMatchFor(
memberMappingData,
out _,
searchParentContexts: false);
if (currentSourceMember == null)
{
return(false);
}
currentMemberPart = new SourceMemberMetaMemberPart(
currentSourceMember,
currentMapperData,
isRootMemberPart: currentMemberPart == null);
currentMappingDataFactory = (sm, tm, md, c) =>
{
var mappingData = ObjectMappingDataFactory.ForChild(sm, tm, 0, md);
return(sm.IsEnumerable
? ObjectMappingDataFactory.ForElement(mappingData)
: ObjectMappingDataFactory.ForChild(sm, tm, 0, md));
};
break;
}
if (metaMember == null)
{
metaMember = currentMemberPart;
continue;
}
if (!metaMember.TrySetNextPart(currentMemberPart))
{
return(false);
}
}
return(true);
}
