public static IDataSource Create(
IQualifiedMember sourceMember,
int dataSourceIndex,
IChildMemberMappingData childMappingData)
{
var childMapperData = childMappingData.MapperData;
if (!childMapperData.MapperContext.UserConfigurations.HasMappingFactories)
{
return(new NullDataSource(Constants.EmptyExpression));
}
var childObjectMappingData = ObjectMappingDataFactory.ForChild(
sourceMember,
childMapperData.TargetMember,
dataSourceIndex,
childMappingData.Parent);
var childCreationContext = new MappingCreationContext(childObjectMappingData);
var mapping = ConfiguredMappingFactory
.GetMappingOrNull(childCreationContext, out _);
if (mapping == null)
{
return(new NullDataSource(Constants.EmptyExpression));
}
var childObjectMapperData = childObjectMappingData.MapperData;
var sourceMemberAccess = sourceMember.GetRelativeQualifiedAccess(childMapperData);
var targetMemberAccess = childMapperData.GetTargetMemberAccess();
var mappingValues = new MappingValues(
sourceMemberAccess,
targetMemberAccess,
childMapperData.ElementIndex,
childMapperData.ElementKey,
dataSourceIndex);
var directAccessMapping = MappingFactory.GetDirectAccessMapping(
mapping,
childObjectMapperData,
mappingValues,
MappingDataCreationFactory.ForChild(mappingValues, childObjectMapperData));
var returnValue = childObjectMapperData
.GetFinalisedReturnValue(directAccessMapping, out var returnsDefault);
if (returnsDefault)
{
returnValue = Expression.Block(directAccessMapping, returnValue);
}
return(new AdHocDataSource(sourceMember, returnValue, childMapperData));
}