private static bool HandleDictionary(
JsonClassInfo elementClassInfo,
JsonSerializerOptions options,
Utf8JsonWriter writer,
ref WriteStack state)
{
JsonPropertyInfo jsonPropertyInfo = state.Current.JsonPropertyInfo;
if (state.Current.Enumerator == null)
{
IEnumerable enumerable;
enumerable = (IEnumerable)jsonPropertyInfo.GetValueAsObject(state.Current.CurrentValue);
if (enumerable == null)
{
// Write a null object or enumerable.
state.Current.WriteObjectOrArrayStart(ClassType.Dictionary, writer, writeNull: true);
return(true);
}
if (enumerable is IDictionary dictionary)
{
state.Current.Enumerator = dictionary.GetEnumerator();
}
else
{
state.Current.Enumerator = enumerable.GetEnumerator();
}
state.Current.WriteObjectOrArrayStart(ClassType.Dictionary, writer);
}
if (state.Current.Enumerator.MoveNext())
{
// Check for polymorphism.
if (elementClassInfo.ClassType == ClassType.Unknown)
{
object currentValue = ((IDictionaryEnumerator)state.Current.Enumerator).Entry.Value;
GetRuntimeClassInfo(currentValue, ref elementClassInfo, options);
}
if (elementClassInfo.ClassType == ClassType.Value)
{
elementClassInfo.GetPolicyProperty().WriteDictionary(ref state.Current, writer);
}
else if (state.Current.Enumerator.Current == null)
{
writer.WriteNull(jsonPropertyInfo.Name);
}
else
{
// An object or another enumerator requires a new stack frame.
var enumerator = (IDictionaryEnumerator)state.Current.Enumerator;
object value = enumerator.Value;
state.Push(elementClassInfo, value);
state.Current.KeyName = (string)enumerator.Key;
}
return(false);
}
// We are done enumerating.
writer.WriteEndObject();
if (state.Current.PopStackOnEnd)
{
state.Pop();
}
else
{
state.Current.EndDictionary();
}
return(true);
}
private static bool HandleObject(
JsonPropertyInfo jsonPropertyInfo,
JsonSerializerOptions options,
Utf8JsonWriter writer,
ref WriteStack state)
{
Debug.Assert(
state.Current.JsonClassInfo.ClassType == ClassType.Object ||
state.Current.JsonClassInfo.ClassType == ClassType.Unknown);
if (!jsonPropertyInfo.ShouldSerialize)
{
state.Current.MoveToNextProperty = true;
return(true);
}
bool obtainedValue = false;
object currentValue = null;
// Check for polymorphism.
if (jsonPropertyInfo.ClassType == ClassType.Unknown)
{
currentValue = jsonPropertyInfo.GetValueAsObject(state.Current.CurrentValue);
obtainedValue = true;
GetRuntimePropertyInfo(currentValue, state.Current.JsonClassInfo, ref jsonPropertyInfo, options);
}
state.Current.JsonPropertyInfo = jsonPropertyInfo;
if (jsonPropertyInfo.ClassType == ClassType.Value)
{
jsonPropertyInfo.Write(ref state, writer);
state.Current.MoveToNextProperty = true;
return(true);
}
// A property that returns an enumerator keeps the same stack frame.
if (jsonPropertyInfo.ClassType == ClassType.Enumerable)
{
bool endOfEnumerable = HandleEnumerable(jsonPropertyInfo.ElementClassInfo, options, writer, ref state);
if (endOfEnumerable)
{
state.Current.MoveToNextProperty = true;
}
return(endOfEnumerable);
}
// A property that returns a dictionary keeps the same stack frame.
if (jsonPropertyInfo.ClassType == ClassType.Dictionary)
{
bool endOfEnumerable = HandleDictionary(jsonPropertyInfo.ElementClassInfo, options, writer, ref state);
if (endOfEnumerable)
{
state.Current.MoveToNextProperty = true;
}
return(endOfEnumerable);
}
// A property that returns a type that is deserialized by passing an
// IDictionary to its constructor keeps the same stack frame.
if (jsonPropertyInfo.ClassType == ClassType.IDictionaryConstructible)
{
state.Current.IsIDictionaryConstructibleProperty = true;
bool endOfEnumerable = HandleDictionary(jsonPropertyInfo.ElementClassInfo, options, writer, ref state);
if (endOfEnumerable)
{
state.Current.MoveToNextProperty = true;
}
return(endOfEnumerable);
}
// A property that returns an object.
if (!obtainedValue)
{
currentValue = jsonPropertyInfo.GetValueAsObject(state.Current.CurrentValue);
}
if (currentValue != null)
{
// A new stack frame is required.
JsonPropertyInfo previousPropertyInfo = state.Current.JsonPropertyInfo;
state.Current.MoveToNextProperty = true;
JsonClassInfo nextClassInfo = jsonPropertyInfo.RuntimeClassInfo;
state.Push(nextClassInfo, currentValue);
// Set the PropertyInfo so we can obtain the property name in order to write it.
state.Current.JsonPropertyInfo = previousPropertyInfo;
}
else
{
if (!jsonPropertyInfo.IgnoreNullValues)
{
writer.WriteNull(jsonPropertyInfo.EscapedName.Value);
}
state.Current.MoveToNextProperty = true;
}
return(true);
}
private static bool HandleEnumerable(
JsonClassInfo elementClassInfo,
JsonSerializerOptions options,
Utf8JsonWriter writer,
ref WriteStack state)
{
Debug.Assert(state.Current.JsonPropertyInfo.ClassType == ClassType.Enumerable);
if (state.Current.CollectionEnumerator == null)
{
IEnumerable enumerable = (IEnumerable)state.Current.JsonPropertyInfo.GetValueAsObject(state.Current.CurrentValue);
if (enumerable == null)
{
if (!state.Current.JsonPropertyInfo.IgnoreNullValues)
{
// Write a null object or enumerable.
state.Current.WriteObjectOrArrayStart(ClassType.Enumerable, writer, writeNull: true);
}
return(true);
}
state.Current.CollectionEnumerator = enumerable.GetEnumerator();
state.Current.WriteObjectOrArrayStart(ClassType.Enumerable, writer);
}
if (state.Current.CollectionEnumerator.MoveNext())
{
// Check for polymorphism.
if (elementClassInfo.ClassType == ClassType.Unknown)
{
object currentValue = state.Current.CollectionEnumerator.Current;
GetRuntimeClassInfo(currentValue, ref elementClassInfo, options);
}
if (elementClassInfo.ClassType == ClassType.Value)
{
elementClassInfo.PolicyProperty.WriteEnumerable(ref state, writer);
}
else if (state.Current.CollectionEnumerator.Current == null)
{
// Write a null object or enumerable.
writer.WriteNullValue();
}
else
{
// An object or another enumerator requires a new stack frame.
object nextValue = state.Current.CollectionEnumerator.Current;
state.Push(elementClassInfo, nextValue);
}
return(false);
}
// We are done enumerating.
writer.WriteEndArray();
if (state.Current.PopStackOnEndCollection)
{
state.Pop();
}
else
{
state.Current.EndArray();
}
return(true);
}