private static bool HandleDictionary(
JsonClassInfo elementClassInfo,
JsonSerializerOptions options,
Utf8JsonWriter writer,
ref WriteStack state)
{
JsonPropertyInfo jsonPropertyInfo = state.Current.JsonPropertyInfo;
if (!jsonPropertyInfo.ShouldSerialize)
{
// Ignore writing this property.
return(true);
}
if (state.Current.Enumerator == null)
{
// Verify that the Dictionary can be serialized by having <string> as first generic argument.
Type[] args = jsonPropertyInfo.RuntimePropertyType.GetGenericArguments();
if (args.Length == 0 || args[0].UnderlyingSystemType != typeof(string))
{
ThrowHelper.ThrowJsonException_DeserializeUnableToConvertValue(state.Current.JsonClassInfo.Type, state.PropertyPath);
}
IEnumerable 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);
}
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;
GetRuntimeClassInfo(currentValue, ref elementClassInfo, options);
}
if (elementClassInfo.ClassType == ClassType.Value)
{
elementClassInfo.GetPolicyProperty().WriteDictionary(options, 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 HandleEnumerable(
JsonClassInfo elementClassInfo,
JsonSerializerOptions options,
Utf8JsonWriter writer,
ref WriteStack state)
{
Debug.Assert(state.Current.JsonPropertyInfo.ClassType == ClassType.Enumerable);
if (state.Current.Enumerator == 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.Enumerator = enumerable.GetEnumerator();
state.Current.WriteObjectOrArrayStart(ClassType.Enumerable, writer);
}
if (state.Current.Enumerator.MoveNext())
{
// Check for polymorphism.
if (elementClassInfo.ClassType == ClassType.Unknown)
{
object currentValue = state.Current.Enumerator.Current;
GetRuntimeClassInfo(currentValue, ref elementClassInfo, options);
}
if (elementClassInfo.ClassType == ClassType.Value)
{
elementClassInfo.GetPolicyProperty().WriteEnumerable(ref state.Current, writer);
}
else if (state.Current.Enumerator.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.Enumerator.Current;
state.Push(elementClassInfo, nextValue);
}
return(false);
}
// We are done enumerating.
writer.WriteEndArray();
if (state.Current.PopStackOnEnd)
{
state.Pop();
}
else
{
state.Current.EndArray();
}
return(true);
}
