private bool WriteSpecialObject(object o)
{
// if the object here is value type, it is in fact boxed
// value type - the reference layout is fine, we should
// write it using WriteField
var type = o.GetType();
if(type.IsValueType)
{
WriteField(type, o);
return true;
}
var speciallySerializable = o as ISpeciallySerializable;
if(speciallySerializable != null)
{
var startingPosition = writer.Position;
speciallySerializable.Save(writer);
writer.Write(writer.Position - startingPosition);
return true;
}
if(type.IsArray)
{
var elementType = type.GetElementType();
var array = o as Array;
var rank = array.Rank;
writer.Write(rank);
WriteArray(elementType, array);
return true;
}
var mDelegate = o as MulticastDelegate;
if(mDelegate != null)
{
// if the target is trasient, we omit associated delegate entry
var invocationList = GetDelegatesWithNonTransientTargets(mDelegate);
writer.Write(invocationList.Length);
foreach(var del in invocationList)
{
WriteField(typeof(object), del.Target);
TouchAndWriteMethodId(del.Method);
}
return true;
}
var str = o as string;
if(str != null)
{
writer.Write(str);
return true;
}
var collectionToken = new CollectionMetaToken(o.GetType());
if(collectionToken.IsCollection)
{
// here we can have normal or extension method that needs to be treated differently
int count = collectionToken.CountMethod.IsStatic ?
(int)collectionToken.CountMethod.Invoke(null, new[] { o }) :
(int)collectionToken.CountMethod.Invoke(o, null);
if(collectionToken.IsDictionary)
{
WriteDictionary(collectionToken, count, o);
}
else
{
WriteEnumerable(collectionToken.FormalElementType, count, (IEnumerable)o);
}
return true;
}
return false;
}
private void WriteDictionary(CollectionMetaToken collectionToken, int count, object dictionary)
{
writer.Write(count);
if(collectionToken.IsGeneric)
{
var enumeratorMethod = typeof(IEnumerable<>).MakeGenericType(typeof(KeyValuePair<,>).MakeGenericType(collectionToken.FormalKeyType, collectionToken.FormalValueType)).GetMethod("GetEnumerator");
var enumerator = enumeratorMethod.Invoke(dictionary, null);
var enumeratorType = enumeratorMethod.ReturnType;
var moveNext = Helpers.GetMethodInfo<IEnumerator>(x => x.MoveNext());
var currentField = enumeratorType.GetProperty("Current");
var current = currentField.GetGetMethod();
var currentType = current.ReturnType;
var key = currentType.GetProperty("Key").GetGetMethod();
var value = currentType.GetProperty("Value").GetGetMethod();
while((bool)moveNext.Invoke(enumerator, null))
{
var currentValue = current.Invoke(enumerator, null);
var keyValue = key.Invoke(currentValue, null);
var valueValue = value.Invoke(currentValue, null);
WriteField(collectionToken.FormalKeyType, keyValue);
WriteField(collectionToken.FormalValueType, valueValue);
}
}
else
{
var castDictionary = (IDictionary)dictionary;
foreach(DictionaryEntry element in castDictionary)
{
WriteField(typeof(object), element.Key);
WriteField(typeof(object), element.Value);
}
}
}
