public virtual Expression GenerateExcludeAction(Type sourceType, Type targetType, ParameterExpression sourcePar, ParameterExpression targetPar, MemberInitExpression mie)
{
Dictionary <MemberInfo, Expression> dic = new Dictionary <MemberInfo, Expression>();
foreach (var m in mie.Bindings)
{
if (m is MemberAssignment ma)
{
dic.Add(ma.Member, ma.Expression);
}
}
MethodInfo pmi = _provider.GetType().GetMethod("GetMapper");
pmi = pmi.MakeGenericMethod(sourceType, targetType);
var mapperType = typeof(IMapper <,>).MakeGenericType(sourceType, targetType);
ParameterExpression mapperVar = ParameterExpression.Variable(mapperType);
var mmaper = Expression.Assign(mapperVar, Expression.Call(
Expression.Constant(_provider),
pmi));
MethodInfo mi = mapperType.GetMethod("GenerateDefaultCopyToDelegateWithExclude", BindingFlags.Public | BindingFlags.Instance);
var actionType = typeof(Action <,>).MakeGenericType(sourceType, targetType);
var actionVar = Expression.Variable(actionType);
var action = Expression.Assign(
actionVar,
Expression.Call(mapperVar, mi, Expression.Constant(dic)));
var invoke = Expression.Invoke(actionVar, sourcePar, targetPar);
return(Expression.Block(
new ParameterExpression[] { mapperVar, actionVar },
mmaper,
action,
invoke
));
}
