private Assignment ProcessTypeMap(TypeMap rootMap)
{
var recorder = new Recorder();
using (var bfm = new BeforeMapPrinter(new TypeNameContext(rootMap), recorder)) { }
foreach (PropertyMap propertyMap in rootMap.PropertyMaps)
{
if (propertyMap.Ignored)
{
continue;
}
RememberTypeLocations(propertyMap);
var ctx = new PropertyNameContext(propertyMap);
//using (var condition = new ConditionPrinter(context, Recorder))
using (var condition = new ConditionPrinterV2(ctx, recorder))
{
//assign without explicit cast
var st = propertyMap.SrcType;
var dt = propertyMap.DestType;
if (dt.IsAssignableFrom(st) || dt.IsImplicitCastableFrom(st))
{
recorder.AppendAssignment(Assign.AsNoCast, ctx);
continue;
}
//assign with explicit cast
if (dt.IsExplicitCastableFrom(st))
{
recorder.AppendAssignment(Assign.AsExplicitCast, ctx);
continue;
}
//assign with src.ToString() call
if (dt == typeof(string) && st != typeof(string))
{
recorder.AppendAssignment(Assign.AsToStringCall, ctx);
continue;
}
//assign with Convert call
if (st == typeof(string) && dt.IsValueType)
{
recorder.AppendAssignment(Assign.AsStringToValueTypeConvert, ctx);
continue;
}
if (!st.IsValueType && !dt.IsValueType)
{
using (var block = new Block(recorder, "if", $"{{0}}.{ctx.SrcMemberName} == null"))
{
recorder.AppendLine($"{{1}}.{ctx.DestMemberName} = null;");
}
using (var block = new Block(recorder, "else"))
{
if (st.IsCollectionType() && dt.IsCollectionType())
{
string template = AssignCollections(ctx)
.AddPropertyNamesToTemplate(ctx.SrcMemberName, ctx.DestMemberName);
recorder.AppendLine(template);
}
else
{
string template = AssignReferenceTypes(ctx)
.AddPropertyNamesToTemplate(ctx.SrcMemberName, ctx.DestMemberName);
recorder.AppendLine(template);
}
}
}
else
{
throw new NotSupportedException();
}
}
}
var assignment = recorder.ToAssignment();
TemplateCache.AddIfNotExist(rootMap.TypePair, assignment.RelativeTemplate);
return(assignment);
}
private string AssignCollections(IPropertyNameContext ctx)
{
var recorder = new Recorder();
var itemSrcType = ctx.SrcType.GenericTypeArguments[0];
var itemDestType = ctx.DestType.GenericTypeArguments[0];
using (var block = new Block(recorder, "if", "{1} == null"))
{
string newCollection = CreationTemplates.NewCollection(ctx.DestType, "{0}.Count");
recorder.AppendLine($"{{1}} = {newCollection};");
}
using (var block = new Block(recorder, "else"))
{
recorder.AppendLine("{1}.Clear();");
}
//fill new (or cleared) collection with the new set of items
recorder.AppendLine(CreationTemplates.Add("{1}", "{0}.Count", itemDestType));
//inner cycle variables (on each iteration itemSrcName is mapped to itemDestName).
string itemSrcName = "src_" + NamingTools.NewGuid(4);
string itemDestName = "dest_" + NamingTools.NewGuid(4);
var typePair = new TypePair(itemSrcType, itemDestType);
Assignment itemAssignment = new Assignment();
string cachedTemplate;
if (TemplateCache.TryGetValue(typePair, out cachedTemplate))
{
itemAssignment.RelativeTemplate = cachedTemplate;
}
else if (itemSrcType.IsCollectionType() && itemDestType.IsCollectionType())
{
var innerContext = PropertyNameContextFactory.CreateWithoutPropertyMap(
itemSrcType, itemDestType, itemSrcName, itemDestName);
string innerTemplate = AssignCollections(innerContext);
itemAssignment.RelativeTemplate = innerTemplate;
}
else
{
var nodeMap = GetTypeMap(typePair);
itemAssignment = ProcessTypeMap(nodeMap);
}
string iterationCode = itemAssignment.GetCode(itemSrcName, itemDestName);
string forCode = StatementTemplates.For(iterationCode,
new ForDeclarationContext("{0}", "{1}", itemSrcName, itemDestName));
recorder.AppendLine(forCode);
string template = recorder.ToAssignment().RelativeTemplate;
return(template);
}