public override void WriteEnumerable(ref WriteStackFrame current, Utf8JsonWriter writer)
{
Debug.Assert(ShouldSerialize);
if (ValueConverter != null)
{
Debug.Assert(current.Enumerator != null);
TProperty?value;
if (current.Enumerator is IEnumerator <TProperty?> enumerator)
{
// Avoid boxing for strongly-typed enumerators such as returned from IList<T>.
value = enumerator.Current;
}
else
{
value = (TProperty?)current.Enumerator.Current;
}
if (value == null)
{
writer.WriteNullValue();
}
else
{
ValueConverter.Write(value.GetValueOrDefault(), writer);
}
}
}
internal static void WriteDictionary <TProperty>(
JsonConverter <TProperty> converter,
JsonSerializerOptions options,
ref WriteStackFrame current,
Utf8JsonWriter writer)
{
if (converter == null)
{
return;
}
Debug.Assert(current.CollectionEnumerator != null);
string key;
TProperty value;
if (current.CollectionEnumerator is IEnumerator <KeyValuePair <string, TProperty> > enumerator)
{
// Avoid boxing for strongly-typed enumerators such as returned from IDictionary<string, TRuntimeProperty>
value = enumerator.Current.Value;
key = enumerator.Current.Key;
}
else if (current.CollectionEnumerator is IEnumerator <KeyValuePair <string, object> > polymorphicEnumerator)
{
value = (TProperty)polymorphicEnumerator.Current.Value;
key = polymorphicEnumerator.Current.Key;
}
else if (current.IsIDictionaryConstructible || current.IsIDictionaryConstructibleProperty)
{
value = (TProperty)((DictionaryEntry)current.CollectionEnumerator.Current).Value;
key = (string)((DictionaryEntry)current.CollectionEnumerator.Current).Key;
}
else
{
// Todo: support non-generic Dictionary here (IDictionaryEnumerator)
throw new NotSupportedException();
}
if (value == null)
{
writer.WriteNull(key);
}
else
{
if (options.DictionaryKeyPolicy != null &&
current.ExtensionDataStatus != ExtensionDataWriteStatus.Writing) // We do not convert extension data.
{
key = options.DictionaryKeyPolicy.ConvertName(key);
if (key == null)
{
ThrowHelper.ThrowInvalidOperationException_SerializerDictionaryKeyNull(options.DictionaryKeyPolicy.GetType());
}
}
JsonEncodedText escapedKey = JsonEncodedText.Encode(key, options.Encoder);
writer.WritePropertyName(escapedKey);
converter.Write(writer, value, options);
}
}
internal static void WriteDictionary <TProperty>(
JsonConverter <TProperty> converter,
JsonSerializerOptions options,
ref WriteStackFrame current,
Utf8JsonWriter writer)
{
Debug.Assert(converter != null && current.CollectionEnumerator != null);
string key;
TProperty value;
if (current.CollectionEnumerator is IEnumerator <KeyValuePair <string, TProperty> > enumerator)
{
key = enumerator.Current.Key;
value = enumerator.Current.Value;
}
else if (current.CollectionEnumerator is IEnumerator <KeyValuePair <string, object> > polymorphicEnumerator)
{
key = polymorphicEnumerator.Current.Key;
value = (TProperty)polymorphicEnumerator.Current.Value;
}
else if (current.CollectionEnumerator is IDictionaryEnumerator iDictionaryEnumerator &&
iDictionaryEnumerator.Key is string keyAsString)
{
key = keyAsString;
value = (TProperty)iDictionaryEnumerator.Value !;
}
protected override void OnWrite(ref WriteStackFrame current, Utf8JsonWriter writer)
{
TConverter value;
if (IsPropertyPolicy)
{
value = (TConverter)current.CurrentValue;
}
else
{
value = (TConverter)Get(current.CurrentValue);
}
if (value == null)
{
Debug.Assert(EscapedName.HasValue);
if (!IgnoreNullValues)
{
writer.WriteNull(EscapedName.Value);
}
}
else if (Converter != null)
{
if (EscapedName.HasValue)
{
writer.WritePropertyName(EscapedName.Value);
}
Converter.Write(writer, value, Options);
}
}
public void GetDictionaryKeyAndValue(ref WriteStackFrame writeStackFrame, out string key, out object value)
{
Debug.Assert(ClassType == ClassType.Dictionary);
if (writeStackFrame.CollectionEnumerator is IDictionaryEnumerator iDictionaryEnumerator)
{
if (iDictionaryEnumerator.Key is string keyAsString)
{
// Since IDictionaryEnumerator is not based on generics we can obtain the value directly.
key = keyAsString;
value = iDictionaryEnumerator.Value;
}
else
{
throw ThrowHelper.GetNotSupportedException_SerializationNotSupportedCollection(
writeStackFrame.JsonPropertyInfo.DeclaredPropertyType,
writeStackFrame.JsonPropertyInfo.ParentClassType,
writeStackFrame.JsonPropertyInfo.PropertyInfo);
}
}
else
{
// Forward to the generic dictionary.
DictionaryValuePropertyPolicy.GetDictionaryKeyAndValueFromGenericDictionary(ref writeStackFrame, out key, out value);
}
}
protected override void OnWriteEnumerable(ref WriteStackFrame current, Utf8JsonWriter writer)
{
if (Converter != null)
{
Debug.Assert(current.CollectionEnumerator != null);
TConverter value;
if (current.CollectionEnumerator is IEnumerator <TConverter> enumerator)
{
// Avoid boxing for strongly-typed enumerators such as returned from IList<T>.
value = enumerator.Current;
}
else
{
value = (TConverter)current.CollectionEnumerator.Current;
}
if (value == null)
{
writer.WriteNullValue();
}
else
{
Converter.Write(writer, value, Options);
}
}
}
internal static void WriteDictionary <TProperty>(
JsonConverter <TProperty> converter,
JsonSerializerOptions options,
ref WriteStackFrame current,
Utf8JsonWriter writer)
{
Debug.Assert(converter != null && current.CollectionEnumerator != null);
string key;
TProperty value;
if (current.CollectionEnumerator is IEnumerator <KeyValuePair <string, TProperty> > enumerator)
{
key = enumerator.Current.Key;
value = enumerator.Current.Value;
}
else if (current.CollectionEnumerator is IEnumerator <KeyValuePair <string, object> > polymorphicEnumerator)
{
key = polymorphicEnumerator.Current.Key;
value = (TProperty)polymorphicEnumerator.Current.Value;
}
else
{
if (((DictionaryEntry)current.CollectionEnumerator.Current).Key is string keyAsString)
{
key = keyAsString;
value = (TProperty)((DictionaryEntry)current.CollectionEnumerator.Current).Value;
}
else
{
throw ThrowHelper.GetNotSupportedException_SerializationNotSupportedCollection(
current.JsonPropertyInfo.DeclaredPropertyType,
current.JsonPropertyInfo.ParentClassType,
current.JsonPropertyInfo.PropertyInfo);
}
}
if (value == null)
{
writer.WriteNull(key);
}
else
{
if (options.DictionaryKeyPolicy != null &&
current.ExtensionDataStatus != ExtensionDataWriteStatus.Writing) // We do not convert extension data.
{
key = options.DictionaryKeyPolicy.ConvertName(key);
if (key == null)
{
ThrowHelper.ThrowInvalidOperationException_SerializerDictionaryKeyNull(options.DictionaryKeyPolicy.GetType());
}
}
writer.WritePropertyName(key);
converter.Write(writer, value, options);
}
}
public void Pop(bool success)
{
Debug.Assert(_count > 0);
if (!success)
{
// Check if we need to initialize the continuation.
if (_continuationCount == 0)
{
if (_count == 1)
{
// No need for a continuation since there is only one stack frame.
_continuationCount = 1;
_count = 1;
}
else
{
AddCurrent();
_count--;
_continuationCount = _count;
_count--;
Current = _previous[_count - 1];
}
return;
}
if (_continuationCount == 1)
{
// No need for a pop since there is only one stack frame.
Debug.Assert(_count == 1);
return;
}
// Update the list entry to the current value.
_previous[_count - 1] = Current;
Debug.Assert(_count > 0);
}
else
{
Debug.Assert(_continuationCount == 0);
if (Current.AsyncEnumerator is not null)
{
// we have completed serialization of an AsyncEnumerator,
// pop from the stack and schedule for async disposal.
PendingAsyncDisposables ??= new List <IAsyncDisposable>();
PendingAsyncDisposables.Add(Current.AsyncEnumerator);
}
}
if (_count > 1)
{
Current = _previous[--_count - 1];
}
}
// There are three conditions to consider for an object (primitive value, enumerable or object) being processed here:
// 1) The object type was specified as the root-level return type to a Parse\Read method.
// 2) The object is property on a parent object.
// 3) The object is an element in an enumerable.
private static bool Write(
Utf8JsonWriter writer,
int flushThreshold,
JsonSerializerOptions options,
ref WriteStack state)
{
bool finishedSerializing;
do
{
WriteStackFrame current = state.Current;
switch (current.JsonClassInfo.ClassType)
{
case ClassType.Enumerable:
finishedSerializing = HandleEnumerable(current.JsonClassInfo.ElementClassInfo, options, writer, ref state);
break;
case ClassType.Value:
Debug.Assert(current.JsonPropertyInfo.ClassType == ClassType.Value);
current.JsonPropertyInfo.Write(ref current, writer);
finishedSerializing = true;
break;
case ClassType.Object:
case ClassType.KeyValuePair:
finishedSerializing = WriteObject(options, writer, ref state);
break;
case ClassType.Dictionary:
case ClassType.IDictionaryConstructible:
finishedSerializing = HandleDictionary(current.JsonClassInfo.ElementClassInfo, options, writer, ref state);
break;
default:
Debug.Assert(state.Current.JsonClassInfo.ClassType == ClassType.Unknown);
// Treat typeof(object) as an empty object.
finishedSerializing = WriteObject(options, writer, ref state);
break;
}
if (finishedSerializing && writer.CurrentDepth == 0)
{
break;
}
// If serialization is not yet end and we surpass beyond flush threshold return false and flush stream.
if (flushThreshold >= 0 && writer.BytesPending > flushThreshold)
{
return(false);
}
} while (true);
return(true);
}
protected override void OnWriteDictionary(ref WriteStackFrame current, Utf8JsonWriter writer)
{
Debug.Assert(Converter != null && current.CollectionEnumerator != null);
string key = null;
TProperty?value = null;
if (current.CollectionEnumerator is IEnumerator <KeyValuePair <string, TProperty?> > enumerator)
{
key = enumerator.Current.Key;
value = enumerator.Current.Value;
}
else
{
if (((DictionaryEntry)current.CollectionEnumerator.Current).Key is string keyAsString)
{
key = keyAsString;
value = (TProperty?)((DictionaryEntry)current.CollectionEnumerator.Current).Value;
}
else
{
throw ThrowHelper.GetNotSupportedException_SerializationNotSupportedCollection(
current.JsonPropertyInfo.DeclaredPropertyType,
current.JsonPropertyInfo.ParentClassType,
current.JsonPropertyInfo.PropertyInfo);
}
}
Debug.Assert(key != null);
if (Options.DictionaryKeyPolicy != null)
{
// We should not be in the Nullable-value implementation branch for extension data.
// (TValue should be typeof(object) or typeof(JsonElement)).
Debug.Assert(current.ExtensionDataStatus != ExtensionDataWriteStatus.Writing);
key = Options.DictionaryKeyPolicy.ConvertName(key);
if (key == null)
{
ThrowHelper.ThrowInvalidOperationException_SerializerDictionaryKeyNull(Options.DictionaryKeyPolicy.GetType());
}
}
if (value == null)
{
writer.WriteNull(key);
}
else
{
writer.WritePropertyName(key);
Converter.Write(writer, value.GetValueOrDefault(), Options);
}
}
protected override void OnWriteDictionary(ref WriteStackFrame current, Utf8JsonWriter writer)
{
Debug.Assert(Converter != null && current.CollectionEnumerator != null);
string key = null;
TProperty?value = null;
if (current.CollectionEnumerator is IEnumerator <KeyValuePair <string, TProperty?> > enumerator)
{
key = enumerator.Current.Key;
value = enumerator.Current.Value;
}
else
{
if (((DictionaryEntry)current.CollectionEnumerator.Current).Key is string keyAsString)
{
key = keyAsString;
value = (TProperty?)((DictionaryEntry)current.CollectionEnumerator.Current).Value;
}
else
{
throw ThrowHelper.GetNotSupportedException_SerializationNotSupportedCollection(
current.JsonPropertyInfo.DeclaredPropertyType,
current.JsonPropertyInfo.ParentClassType,
current.JsonPropertyInfo.PropertyInfo);
}
}
Debug.Assert(key != null);
if (value == null)
{
writer.WriteNull(key);
}
else
{
if (Options.DictionaryKeyPolicy != null)
{
key = Options.DictionaryKeyPolicy.ConvertName(key);
if (key == null)
{
ThrowHelper.ThrowInvalidOperationException_SerializerDictionaryKeyNull(Options.DictionaryKeyPolicy.GetType());
}
}
writer.WritePropertyName(key);
Converter.Write(writer, value.GetValueOrDefault(), Options);
}
}
public void Pop(bool success)
{
Debug.Assert(_count > 0);
if (!success)
{
// Check if we need to initialize the continuation.
if (_continuationCount == 0)
{
if (_count == 1)
{
// No need for a continuation since there is only one stack frame.
_continuationCount = 1;
_count = 1;
}
else
{
AddCurrent();
_count--;
_continuationCount = _count;
_count--;
Current = _previous[_count - 1];
}
return;
}
if (_continuationCount == 1)
{
// No need for a pop since there is only one stack frame.
Debug.Assert(_count == 1);
return;
}
// Update the list entry to the current value.
_previous[_count - 1] = Current;
Debug.Assert(_count > 0);
}
else
{
Debug.Assert(_continuationCount == 0);
}
if (_count > 1)
{
Current = _previous[--_count - 1];
}
}
public void Pop(bool success)
{
Debug.Assert(_count > 0);
if (!success)
{
// Check if we need to initialize the continuation.
if (_continuationCount == 0)
{
if (_count == 1)
{
// No need to copy any frames here.
_continuationCount = 1;
_count = 0;
return;
}
// Need to push the Current frame to the stack,
// ensure that we have sufficient capacity.
EnsurePushCapacity();
_continuationCount = _count--;
}
else if (--_count == 0)
{
// reached the root, no need to copy frames.
return;
}
_stack[_count] = Current;
Current = _stack[_count - 1];
}
else
{
Debug.Assert(_continuationCount == 0);
if (Current.AsyncEnumerator is not null)
{
// we have completed serialization of an AsyncEnumerator,
// pop from the stack and schedule for async disposal.
PendingAsyncDisposables ??= new List <IAsyncDisposable>();
PendingAsyncDisposables.Add(Current.AsyncEnumerator);
}
if (--_count > 0)
{
Current = _stack[_count - 1];
}
}
}
public void Push()
{
if (_continuationCount == 0)
{
Debug.Assert(Current.PolymorphicSerializationState != PolymorphicSerializationState.PolymorphicReEntrySuspended);
if (_count == 0 && Current.PolymorphicSerializationState == PolymorphicSerializationState.None)
{
// Perf enhancement: do not create a new stackframe on the first push operation
// unless the converter has primed the current frame for polymorphic dispatch.
_count = 1;
_indexOffset = 1; // currentIndex := _count - 1;
}
else
{
JsonTypeInfo jsonTypeInfo = Current.GetNestedJsonTypeInfo();
JsonNumberHandling?numberHandling = Current.NumberHandling;
EnsurePushCapacity();
_stack[_count - _indexOffset] = Current;
Current = default;
_count++;
Current.JsonTypeInfo = jsonTypeInfo;
Current.JsonPropertyInfo = jsonTypeInfo.PropertyInfoForTypeInfo;
// Allow number handling on property to win over handling on type.
Current.NumberHandling = numberHandling ?? Current.JsonPropertyInfo.EffectiveNumberHandling;
}
}
else
{
// We are re-entering a continuation, adjust indices accordingly
if (_count++ > 0 || _indexOffset == 0)
{
Current = _stack[_count - _indexOffset];
}
// check if we are done
if (_continuationCount == _count)
{
_continuationCount = 0;
}
}
#if DEBUG
// Ensure the method is always exercised in debug builds.
_ = PropertyPath();
#endif
}
public override void GetDictionaryKeyAndValueFromGenericDictionary(ref WriteStackFrame writeStackFrame, out string key, out object?value)
{
if (writeStackFrame.CollectionEnumerator is IEnumerator <KeyValuePair <string, TDeclaredProperty> > genericEnumerator)
{
key = genericEnumerator.Current.Key;
value = genericEnumerator.Current.Value;
}
else
{
throw ThrowHelper.GetNotSupportedException_SerializationNotSupportedCollection(
writeStackFrame.JsonPropertyInfo !.DeclaredPropertyType,
writeStackFrame.JsonPropertyInfo.ParentClassType,
writeStackFrame.JsonPropertyInfo.PropertyInfo);
}
}
internal static void WriteDictionary <TProperty>(
JsonValueConverter <TProperty> converter,
JsonSerializerOptions options,
ref WriteStackFrame current,
Utf8JsonWriter writer)
{
if (converter == null)
{
return;
}
Debug.Assert(current.Enumerator != null);
string key;
TProperty value;
if (current.Enumerator is IEnumerator <KeyValuePair <string, TProperty> > enumerator)
{
// Avoid boxing for strongly-typed enumerators such as returned from IDictionary<string, TRuntimeProperty>
value = enumerator.Current.Value;
key = enumerator.Current.Key;
}
else if (current.Enumerator is IEnumerator <KeyValuePair <string, object> > polymorphicEnumerator)
{
value = (TProperty)polymorphicEnumerator.Current.Value;
key = polymorphicEnumerator.Current.Key;
}
else if (current.IsImmutableDictionary || current.IsImmutableDictionaryProperty)
{
value = (TProperty)((DictionaryEntry)current.Enumerator.Current).Value;
key = (string)((DictionaryEntry)current.Enumerator.Current).Key;
}
else
{
// Todo: support non-generic Dictionary here (IDictionaryEnumerator)
throw new NotSupportedException();
}
if (value == null)
{
writer.WriteNull(key);
}
else
{
JsonEncodedText escapedKey = JsonEncodedText.Encode(key);
converter.Write(escapedKey, value, writer);
}
}
private static void WriteExtensionData(Utf8JsonWriter writer, ref WriteStackFrame frame)
{
DictionaryEntry entry = ((IDictionaryEnumerator)frame.Enumerator).Entry;
if (entry.Value is JsonElement element)
{
Debug.Assert(entry.Key is string);
string propertyName = (string)entry.Key;
element.WriteProperty(propertyName, writer);
}
else
{
ThrowHelper.ThrowInvalidOperationException_SerializationDataExtensionPropertyInvalid(frame.JsonClassInfo, entry.Value.GetType());
}
}
public void Push()
{
if (_continuationCount == 0)
{
if (_count == 0)
{
// Performance optimization: reuse the first stackframe on the first push operation.
// NB need to be careful when making writes to Current _before_ the first `Push`
// operation is performed.
_count = 1;
}
else
{
JsonTypeInfo jsonTypeInfo = Current.GetNestedJsonTypeInfo();
JsonNumberHandling?numberHandling = Current.NumberHandling;
EnsurePushCapacity();
_stack[_count - 1] = Current;
Current = default;
_count++;
Current.JsonTypeInfo = jsonTypeInfo;
Current.JsonPropertyInfo = jsonTypeInfo.PropertyInfoForTypeInfo;
// Allow number handling on property to win over handling on type.
Current.NumberHandling = numberHandling ?? Current.JsonPropertyInfo.NumberHandling;
}
}
else
{
// We are re-entering a continuation, adjust indices accordingly
if (_count++ > 0)
{
Current = _stack[_count - 1];
}
// check if we are done
if (_continuationCount == _count)
{
_continuationCount = 0;
}
}
#if DEBUG
// Ensure the method is always exercised in debug builds.
_ = PropertyPath();
#endif
}
public void Push()
{
if (_continuationCount == 0)
{
if (_count == 0)
{
// The first stack frame is held in Current.
_count = 1;
}
else
{
JsonTypeInfo jsonTypeInfo = Current.GetPolymorphicJsonPropertyInfo().RuntimeTypeInfo;
JsonNumberHandling?numberHandling = Current.NumberHandling;
AddCurrent();
Current.Reset();
Current.JsonTypeInfo = jsonTypeInfo;
Current.DeclaredJsonPropertyInfo = jsonTypeInfo.PropertyInfoForTypeInfo;
// Allow number handling on property to win over handling on type.
Current.NumberHandling = numberHandling ?? Current.DeclaredJsonPropertyInfo.NumberHandling;
}
}
else if (_continuationCount == 1)
{
// No need for a push since there is only one stack frame.
Debug.Assert(_count == 1);
_continuationCount = 0;
}
else
{
// A continuation, adjust the index.
Current = _previous[_count - 1];
// Check if we are done.
if (_count == _continuationCount)
{
_continuationCount = 0;
}
else
{
_count++;
}
}
}
public void Push()
{
if (_continuationCount == 0)
{
if (_count == 0)
{
// The first stack frame is held in Current.
_count = 1;
}
else
{
JsonTypeInfo jsonTypeInfo = Current.GetPolymorphicJsonPropertyInfo().RuntimeTypeInfo;
JsonNumberHandling?numberHandling = Current.NumberHandling;
EnsurePushCapacity();
_stack[_count - 1] = Current;
Current = default;
_count++;
Current.JsonTypeInfo = jsonTypeInfo;
Current.DeclaredJsonPropertyInfo = jsonTypeInfo.PropertyInfoForTypeInfo;
// Allow number handling on property to win over handling on type.
Current.NumberHandling = numberHandling ?? Current.DeclaredJsonPropertyInfo.NumberHandling;
}
}
else
{
// We are re-entering a continuation, adjust indices accordingly
if (_count++ > 0)
{
Current = _stack[_count - 1];
}
// check if we are done
if (_continuationCount == _count)
{
_continuationCount = 0;
}
}
#if DEBUG
// Ensure the method is always exercised in debug builds.
_ = PropertyPath();
#endif
}
public override void Write(ref WriteStackFrame current, Utf8JsonWriter writer)
{
Debug.Assert(ShouldSerialize);
if (current.Enumerator != null)
{
// Forward the setter to the value-based JsonPropertyInfo.
JsonPropertyInfo propertyInfo = ElementClassInfo.GetPolicyProperty();
propertyInfo.WriteEnumerable(ref current, writer);
}
else
{
TProperty?value;
if (IsPropertyPolicy)
{
value = (TProperty?)current.CurrentValue;
}
else
{
value = Get(current.CurrentValue);
}
if (value == null)
{
Debug.Assert(EscapedName.HasValue);
if (!IgnoreNullValues)
{
writer.WriteNull(EscapedName.Value);
}
}
else if (ValueConverter != null)
{
if (EscapedName.HasValue)
{
ValueConverter.Write(EscapedName.Value, value.GetValueOrDefault(), writer);
}
else
{
ValueConverter.Write(value.GetValueOrDefault(), writer);
}
}
}
}
protected override void OnWriteDictionary(ref WriteStackFrame current, Utf8JsonWriter writer)
{
Debug.Assert(Converter != null && current.CollectionEnumerator != null);
string? key = null;
TProperty?value = null;
if (current.CollectionEnumerator is IEnumerator <KeyValuePair <string, TProperty?> > enumerator)
{
key = enumerator.Current.Key;
value = enumerator.Current.Value;
}
else
{
if (((DictionaryEntry)current.CollectionEnumerator.Current !).Key is string keyAsString)
{
key = keyAsString;
value = (TProperty?)((DictionaryEntry)current.CollectionEnumerator.Current).Value;
}
public void Push()
{
if (_continuationCount == 0)
{
if (_count == 0)
{
// The first stack frame is held in Current.
_count = 1;
}
else
{
JsonClassInfo jsonClassInfo = Current.GetPolymorphicJsonPropertyInfo().RuntimeClassInfo;
AddCurrent();
Current.Reset();
Current.JsonClassInfo = jsonClassInfo;
Current.DeclaredJsonPropertyInfo = jsonClassInfo.PropertyInfoForClassInfo;
}
}
else if (_continuationCount == 1)
{
// No need for a push since there is only one stack frame.
Debug.Assert(_count == 1);
_continuationCount = 0;
}
else
{
// A continuation, adjust the index.
Current = _previous[_count - 1];
// Check if we are done.
if (_count == _continuationCount)
{
_continuationCount = 0;
}
else
{
_count++;
}
}
}
public void Pop(bool success)
{
Debug.Assert(_count > 0);
if (!success)
{
// Check if we need to initialize the continuation.
if (_continuationCount == 0)
{
if (_count == 1 && _indexOffset > 0)
{
// No need to copy any frames here.
_continuationCount = 1;
_count = 0;
return;
}
// Need to push the Current frame to the stack,
// ensure that we have sufficient capacity.
EnsurePushCapacity();
_continuationCount = _count--;
}
else if (--_count == 0 && _indexOffset > 0)
{
// reached the root, no need to copy frames.
return;
}
int currentIndex = _count - _indexOffset;
_stack[currentIndex + 1] = Current;
Current = _stack[currentIndex];
}
else
{
Debug.Assert(_continuationCount == 0);
if (--_count > 0 || _indexOffset == 0)
{
Current = _stack[_count - _indexOffset];
}
}
}
protected override void OnWriteDictionary(ref WriteStackFrame current, Utf8JsonWriter writer)
{
Debug.Assert(Converter != null && current.CollectionEnumerator != null);
string key = null;
TProperty?value = null;
if (current.CollectionEnumerator is IEnumerator <KeyValuePair <string, TProperty?> > enumerator)
{
key = enumerator.Current.Key;
value = enumerator.Current.Value;
}
else if (current.IsIDictionaryConstructible || current.IsIDictionaryConstructibleProperty)
{
key = (string)((DictionaryEntry)current.CollectionEnumerator.Current).Key;
value = (TProperty?)((DictionaryEntry)current.CollectionEnumerator.Current).Value;
}
Debug.Assert(key != null);
if (value == null)
{
writer.WriteNull(key);
}
else
{
if (Options.DictionaryKeyPolicy != null)
{
key = Options.DictionaryKeyPolicy.ConvertName(key);
if (key == null)
{
ThrowHelper.ThrowInvalidOperationException_SerializerDictionaryKeyNull(Options.DictionaryKeyPolicy.GetType());
}
}
writer.WritePropertyName(key);
Converter.Write(writer, value.GetValueOrDefault(), Options);
}
}
public override void Write(ref WriteStackFrame current, Utf8JsonWriter writer)
{
Debug.Assert(current.Enumerator == null);
Debug.Assert(ShouldSerialize);
TRuntimeProperty value;
if (IsPropertyPolicy)
{
value = (TRuntimeProperty)current.CurrentValue;
}
else
{
value = (TRuntimeProperty)Get(current.CurrentValue);
}
if (value == null)
{
Debug.Assert(EscapedName.HasValue);
if (!IgnoreNullValues)
{
writer.WriteNull(EscapedName.Value);
}
}
else if (ValueConverter != null)
{
if (EscapedName.HasValue)
{
ValueConverter.Write(EscapedName.Value, value, writer);
}
else
{
ValueConverter.Write(value, writer);
}
}
}
protected override void OnWriteDictionary(ref WriteStackFrame current, Utf8JsonWriter writer)
{
JsonSerializer.WriteDictionary(Converter, Options, ref current, writer);
}
protected abstract void OnWriteEnumerable(ref WriteStackFrame current, Utf8JsonWriter writer);
protected virtual void OnWriteDictionary(ref WriteStackFrame current, Utf8JsonWriter writer)
{
}
// There are three conditions to consider for an object (primitive value, enumerable or object) being processed here:
// 1) The object type was specified as the root-level return type to a Parse\Read method.
// 2) The object is property on a parent object.
// 3) The object is an element in an enumerable.
private static bool Write(
Utf8JsonWriter writer,
int flushThreshold,
JsonSerializerOptions options,
ref WriteStack state)
{
bool finishedSerializing;
int currentDepth = writer.CurrentDepth;
try
{
do
{
WriteStackFrame current = state.Current;
switch (current.JsonClassInfo.ClassType)
{
case ClassType.Enumerable:
finishedSerializing = HandleEnumerable(current.JsonClassInfo.ElementClassInfo, options, writer, ref state);
break;
case ClassType.Value:
Debug.Assert(current.JsonPropertyInfo.ClassType == ClassType.Value);
current.JsonPropertyInfo.Write(ref state, writer);
finishedSerializing = true;
break;
case ClassType.Object:
finishedSerializing = WriteObject(options, writer, ref state);
break;
case ClassType.Dictionary:
case ClassType.IDictionaryConstructible:
finishedSerializing = HandleDictionary(current.JsonClassInfo.ElementClassInfo, options, writer, ref state);
break;
default:
Debug.Assert(state.Current.JsonClassInfo.ClassType == ClassType.Unknown);
// Treat typeof(object) as an empty object.
finishedSerializing = WriteObject(options, writer, ref state);
break;
}
if (finishedSerializing)
{
if (writer.CurrentDepth == 0 || writer.CurrentDepth == currentDepth)
{
break;
}
}
else if (writer.CurrentDepth >= options.EffectiveMaxDepth)
{
ThrowHelper.ThrowJsonException_DepthTooLarge(writer.CurrentDepth, state, options);
}
// If serialization is not yet end and we surpass beyond flush threshold return false and flush stream.
if (flushThreshold >= 0 && writer.BytesPending > flushThreshold)
{
return(false);
}
} while (true);
}
catch (InvalidOperationException ex) when(ex.Source == ThrowHelper.ExceptionSourceValueToRethrowAsJsonException)
{
ThrowHelper.ReThrowWithPath(state, ex);
}
catch (JsonException ex)
{
ThrowHelper.AddExceptionInformation(state, ex);
throw;
}
return(true);
}
