void Introspect(object source, Field field)
{
if (IntrospectNullValue(source, field))
return;
var sourceType = source.GetType();
if (IntrospectSimpleValue(source, field, sourceType))
return;
if (SeenObjectBefore(source, field))
return;
// handle a subset of dictionaries separately for terser printing
if (IntrospectDictionaryWithSimpleKey(source as IDictionary, field, sourceType))
return;
if (IntrospectIEnumerable(source, field))
return;
IntrospectComplexType(source, field, sourceType);
}
private bool SeenObjectBefore(object source, Field field)
{
Reference reference;
if(seenBefore.TryGetValue(source, out reference))
{
tokens.Add(Token.SeenBefore(field, reference));
return true;
}
else
{
seenBefore[source] = new Reference(referenceCounter++);
return false;
}
}
private bool IntrospectIEnumerable(object source, Field field)
{
var enumerable = source as IEnumerable;
if (enumerable == null)
return false;
Reference optionReferenceInfo;
seenBefore.TryGetValue(source, out optionReferenceInfo);
tokens.Add(new Token(TokenType.FieldnameWithTypeAndReference, field, null, optionReferenceInfo, source.GetType()));
tokens.Add(StartEnumeration);
int i = 0;
foreach (var x in enumerable)
{
var outputFieldName = new Field(field.Name, ""+ i++);
Introspect(x, outputFieldName);
}
tokens.Add(EndEnumeration);
return true;
}
bool IntrospectDictionaryWithSimpleKey(IDictionary source, Field field, Type sourceType)
{
if (source == null)
return false;
if(sourceType.GetGenericArguments().Length != 2)
return false;
IValueConverter handler;
var keyType = sourceType.GetGenericArguments().First();
var isKeyTypeSimple = Configuration.TryGetValueConverter(keyType, out handler);
if (!isKeyTypeSimple)
return false; // print as enumerable which is more verbose
tokens.Add(StartEnumeration);
var keys = source.Keys;
foreach (var key in keys)
{
var valueValue = source[key];
var keyValue = handler.Convert(key);
var outputfieldName = new Field(field.Name, keyValue);
Introspect(valueValue, outputfieldName);
}
tokens.Add(EndEnumeration);
return true;
}
bool IntrospectNullValue(object source, Field field)
{
if (source != null)
return false;
tokens.Add(new Token(TokenType.SimpleFieldValue, field, "null"));
return true;
}
bool IntrospectSimpleValue(object source, Field field, Type sourceType)
{
IValueConverter handler;
if (!Configuration.TryGetValueConverter(sourceType, out handler))
return false;
tokens.Add(new Token(TokenType.SimpleFieldValue, field, handler.Convert(source)));
return true;
}
void IntrospectComplexType(object source, Field field, Type sourceType)
{
Reference optionReferenceInfo;
seenBefore.TryGetValue(source, out optionReferenceInfo);
tokens.Add(new Token(TokenType.FieldnameWithTypeAndReference, field, null, optionReferenceInfo, sourceType));
tokens.Add(Startscope);
ReflectionInfo reflection = ReflectFields(sourceType);
for (int i = 0; i < reflection.RawReflectedFields.Count; i++)
{
var ffield = reflection.RawReflectedFields[i];
Introspect(ffield.GetValue(source), reflection.Fields[i]);
}
tokens.Add(Endscope);
}
void IntrospectComplexType(object source, Field field, Type sourceType)
{
Reference optionReferenceInfo;
seenBefore.TryGetValue(source, out optionReferenceInfo);
tokens.Add(new Token(TokenType.FieldnameWithTypeAndReference, field, null, optionReferenceInfo, sourceType));
tokens.Add(Startscope);
ReflectionInfo reflection = ReflectFields(sourceType);
for (int i = 0; i < reflection.Fields.Length; i++)
{
Introspect(reflection.ValueProviders[i](source), reflection.Fields[i]);
}
tokens.Add(Endscope);
}