public Expression MapObjects(ExpressionMapper <TSource, TDest> mapper, Expression source)
{
var param = mapper._getCurrent == null ? (ParameterExpression)source : Expression.Parameter(source.Type, "source");
Expression expr;
object m;
if (mapper._parameters.MapperList.TryGetValue(new { S = typeof(TS), D = typeof(TD) }, out m))
{
var map = (Mapper <TS, TD>)m;
if (map.Map == null)
{
expr = Expression.Invoke(
Expression.PropertyOrField(Expression.Constant(map), "Map"),
source, mapper._parameters.MappingContext);
}
else
{
expr = Expression.Invoke(Expression.Constant(map.Map), source, mapper._parameters.MappingContext);
}
}
else
{
var exmap = new ExpressionMapper <TS, TD>(mapper._parameters);
expr = exmap.GetMemberInit(param);
}
if (mapper._getCurrent == null)
{
return(expr);
}
if (!mapper.HandleBackReferences)
{
Expression <Func <object> > func = () => MapObjects((TS)null, null);
return(Expression.Call((MethodInfo)ReflectionHelper.MemeberInfo(func), source, Expression.Lambda <Func <TS, TD> >(expr, param)));
}
else
{
mapper._parameters.UseContext = true;
Expression <Func <object> > func = () => MapCrossReferences(null, null, null, null, null);
return(Expression.Call(
(MethodInfo)ReflectionHelper.MemeberInfo(func),
mapper._parameters.MappingContext,
source,
Expression.Lambda <Func <TS, TD> >(expr, param),
Expression.Constant(mapper._getCurrent),
Expression.Constant(mapper._setCurrent)));
}
}
