protected override Expression VisitMember(MemberExpression node)
{
if (node.NodeType == ExpressionType.Constant)
{
return(base.VisitMember(node));
}
string sourcePath;
var parameterExpression = node.GetParameterExpression();
if (parameterExpression == null)
{
return(base.VisitMember(node));
}
InfoDictionary.Add(parameterExpression, TypeMappings);
var sType = parameterExpression.Type;
if (sType != null && InfoDictionary.ContainsKey(parameterExpression) && node.IsMemberExpression())
{
sourcePath = node.GetPropertyFullName();
}
else
{
return(base.VisitMember(node));
}
var propertyMapInfoList = new List <PropertyMapInfo>();
FindDestinationFullName(sType, InfoDictionary[parameterExpression].DestType, sourcePath, propertyMapInfoList);
string fullName;
if (propertyMapInfoList.Any(x => x.CustomExpression != null))//CustomExpression takes precedence over DestinationPropertyInfo
{
var last = propertyMapInfoList.Last(x => x.CustomExpression != null);
var beforeCustExpression = propertyMapInfoList.Aggregate(new List <PropertyMapInfo>(), (list, next) =>
{
if (propertyMapInfoList.IndexOf(next) < propertyMapInfoList.IndexOf(last))
{
list.Add(next);
}
return(list);
});
var afterCustExpression = propertyMapInfoList.Aggregate(new List <PropertyMapInfo>(), (list, next) =>
{
if (propertyMapInfoList.IndexOf(next) > propertyMapInfoList.IndexOf(last))
{
list.Add(next);
}
return(list);
});
fullName = BuildFullName(beforeCustExpression);
var visitor = new PrependParentNameVisitor(last.CustomExpression.Parameters[0].Type /*Parent type of current property*/, fullName, InfoDictionary[parameterExpression].NewParameter);
var ex = propertyMapInfoList[propertyMapInfoList.Count - 1] != last
? visitor.Visit(last.CustomExpression.Body.MemberAccesses(afterCustExpression))
: visitor.Visit(last.CustomExpression.Body);
var v = new FindMemberExpressionsVisitor(InfoDictionary[parameterExpression].NewParameter);
v.Visit(ex);
return(v.Result);
}
fullName = BuildFullName(propertyMapInfoList);
var me = ExpressionFactory.MemberAccesses(fullName, InfoDictionary[parameterExpression].NewParameter);
if (me.Expression.NodeType == ExpressionType.MemberAccess && (me.Type == typeof(string) || me.Type.GetTypeInfo().IsValueType || (me.Type.GetTypeInfo().IsGenericType &&
me.Type.GetGenericTypeDefinition() == typeof(Nullable <>) &&
Nullable.GetUnderlyingType(me.Type).GetTypeInfo().IsValueType)))
{
return(me.Expression);
}
return(me);
}