private static JProperty ReadProperty([Nullable(1)] JsonReader r, JsonLoadSettings settings, IJsonLineInfo lineInfo, [Nullable(1)] JContainer parent)
{
DuplicatePropertyNameHandling duplicatePropertyNameHandling = (settings != null) ? settings.DuplicatePropertyNameHandling : DuplicatePropertyNameHandling.Replace;
JObject jobject = (JObject)parent;
string text = r.Value.ToString();
JProperty jproperty = jobject.Property(text, StringComparison.Ordinal);
if (jproperty != null)
{
if (duplicatePropertyNameHandling == DuplicatePropertyNameHandling.Ignore)
{
return(null);
}
if (duplicatePropertyNameHandling == DuplicatePropertyNameHandling.Error)
{
throw JsonReaderException.Create(r, "Property with the name '{0}' already exists in the current JSON object.".FormatWith(CultureInfo.InvariantCulture, text));
}
}
JProperty jproperty2 = new JProperty(text);
jproperty2.SetLineInfo(lineInfo, settings);
if (jproperty == null)
{
parent.Add(jproperty2);
}
else
{
jproperty.Replace(jproperty2);
}
return(jproperty2);
}
/// <summary>
/// Initializes a new instance of the <see cref="JsonObject"/> class representing the empty object.
/// </summary>
/// <param name="duplicatePropertyNameHandling">Specifies the way of handling duplicate property names.</param>
/// <exception cref="ArgumentException">
/// Provided manner of handling duplicates does not exist.
/// </exception>
public JsonObject(DuplicatePropertyNameHandling duplicatePropertyNameHandling = DuplicatePropertyNameHandling.Replace)
{
if ((uint)duplicatePropertyNameHandling > (uint)DuplicatePropertyNameHandling.Error)
{
throw new ArgumentOutOfRangeException(SR.InvalidDuplicatePropertyNameHandling);
}
_dictionary = new Dictionary <string, JsonNode>();
_duplicatePropertyNameHandling = duplicatePropertyNameHandling;
}
private JsonObject ReadObject(ref Utf8JsonReader reader, JsonSerializerOptions options)
{
DuplicatePropertyNameHandling duplicatePropertyNameHandling = options.GetDuplicatePropertyNameHandling();
JsonObject obj = new JsonObject();
while (reader.Read() && reader.TokenType != JsonTokenType.EndObject)
{
if (reader.TokenType != JsonTokenType.PropertyName)
{
throw new JsonException();
}
string?propertyName = reader.GetString();
if (propertyName == null)
{
throw new JsonException("Property name cannot be null");
}
reader.Read();
JsonNode propertyValue = Read(ref reader, typeof(JsonNode), options);
switch (duplicatePropertyNameHandling)
{
case DuplicatePropertyNameHandling.Replace:
obj[propertyName] = propertyValue;
break;
case DuplicatePropertyNameHandling.Ignore:
if (!obj.ContainsProperty(propertyName))
{
obj.Add(propertyName, propertyValue);
}
break;
case DuplicatePropertyNameHandling.Error:
if (!obj.ContainsProperty(propertyName))
{
obj.Add(propertyName, propertyValue);
}
else
{
throw new JsonException($"Duplicate property '{propertyName}'");
}
break;
}
}
return(obj);
}
public void ReadDuplicateKey(DuplicatePropertyNameHandling duplicatePropertyNameHandling, string expectedValue, Type expectedExceptionType)
{
JsonSerializerOptions options = new JsonSerializerOptions().SetupExtensions();
options.SetDuplicatePropertyNameHandling(duplicatePropertyNameHandling);
const string json = @"{""key"":""foo"",""key"":""bar""}";
Dictionary <string, string> expected = new Dictionary <string, string>
{
["key"] = expectedValue,
};
Helper.TestRead <Dictionary <string, string> >(json, expected, options, expectedExceptionType);
}
private static void AddToParent(
KeyValuePair <string, JsonNode> nodePair,
ref Stack <KeyValuePair <string, JsonNode> > currentNodes,
ref JsonNode toReturn,
DuplicatePropertyNameHandling duplicatePropertyNameHandling = DuplicatePropertyNameHandling.Replace)
{
if (currentNodes.Any())
{
KeyValuePair <string, JsonNode> parentPair = currentNodes.Peek();
// Parent needs to be JsonObject or JsonArray
Debug.Assert(parentPair.Value is JsonObject || parentPair.Value is JsonArray);
if (parentPair.Value is JsonObject jsonObject)
{
Debug.Assert(nodePair.Key != null);
// Handle duplicate properties accordingly to duplicatePropertyNameHandling:
if (duplicatePropertyNameHandling == DuplicatePropertyNameHandling.Replace)
{
jsonObject[nodePair.Key] = nodePair.Value;
}
else if (jsonObject._dictionary.ContainsKey(nodePair.Key))
{
if (duplicatePropertyNameHandling == DuplicatePropertyNameHandling.Error)
{
throw new ArgumentException(SR.JsonObjectDuplicateKey);
}
Debug.Assert(duplicatePropertyNameHandling == DuplicatePropertyNameHandling.Ignore);
}
else
{
jsonObject.Add(nodePair);
}
}
else if (parentPair.Value is JsonArray jsonArray)
{
Debug.Assert(nodePair.Key == null);
jsonArray.Add(nodePair.Value);
}
}
else
{
toReturn = nodePair.Value;
}
}
private static void TestDuplicates(DuplicatePropertyNameHandling duplicatePropertyNameHandling, string previousValue, string newValue, string expectedValue, bool useDefaultCtor = false)
{
JsonObject jsonObject = useDefaultCtor ? new JsonObject() : new JsonObject(duplicatePropertyNameHandling);
jsonObject.Add("property", new JsonString(previousValue));
Assert.Equal(previousValue, ((JsonString)jsonObject["property"]).Value);
jsonObject.Add("property", new JsonString(newValue));
Assert.Equal(expectedValue, ((JsonString)jsonObject["property"]).Value);
// with indexer, property should change no matter which duplicates handling option is chosen:
jsonObject["property"] = (JsonString)"indexer value";
Assert.Equal("indexer value", (JsonString)jsonObject["property"]);
}
private static void PrintJson(string header, DuplicatePropertyNameHandling duplicateFlag)
{
try
{
Console.WriteLine();
Console.WriteLine("---" + header + "---");
JsonLoadSettings jsonLoadSettings = (duplicateFlag == DuplicatePropertyNameHandling.Replace)
? null
: new JsonLoadSettings {
DuplicatePropertyNameHandling = duplicateFlag
};
JToken jToken = JToken.Parse(data, jsonLoadSettings);
Console.WriteLine(jToken.ToString(Formatting.Indented));
Console.WriteLine();
}
catch (JsonReaderException jsonReaderException)
{
Console.WriteLine("Exception thrown: " + jsonReaderException.Message);
}
}
/// <summary>
/// Initializes a new instance of the <see cref="JsonObject"/> class representing provided set of JSON properties.
/// </summary>
/// <param name="jsonProperties">>Properties to represent as a JSON object.</param>
/// <param name="duplicatePropertyNameHandling">Specifies the way of handling duplicate property names.</param>
/// <exception cref="ArgumentException">
/// Provided collection contains duplicates if handling duplicates is set to <see cref="DuplicatePropertyNameHandling.Error"/>.
/// </exception>
public JsonObject(
IEnumerable <KeyValuePair <string, JsonNode> > jsonProperties,
DuplicatePropertyNameHandling duplicatePropertyNameHandling = DuplicatePropertyNameHandling.Replace)
: this(duplicatePropertyNameHandling)
=> AddRange(jsonProperties);
public static void SetDuplicatePropertyNameHandling(this JsonSerializerOptions options, DuplicatePropertyNameHandling duplicatePropertyNameHandling)
{
options.GetState().DuplicatePropertyNameHandling = duplicatePropertyNameHandling;
}
public static void TestDuplicatesReplaceAndIgnore(DuplicatePropertyNameHandling duplicatePropertyNameHandling, string previousValue, string newValue, string expectedValue, bool useDefaultCtor = false)
{
TestDuplicates(duplicatePropertyNameHandling, previousValue, newValue, expectedValue, useDefaultCtor);
}
/// <summary>
/// Initializes a new instance of the <see cref="JsonLoadSettings"/> class.
/// </summary>
public JsonLoadSettings()
{
_lineInfoHandling = LineInfoHandling.Load;
_commentHandling = CommentHandling.Ignore;
_duplicatePropertyNameHandling = DuplicatePropertyNameHandling.Replace;
}
/// <summary>
/// Parses a string representing JSON document into <see cref="JsonNode"/>.
/// </summary>
/// <param name="json">JSON to parse.</param>
/// <param name="options">Options to control the reader behavior during parsing.</param>
/// <param name="duplicatePropertyNameHandling">Specifies the way of handling duplicate property names.</param>
/// <returns><see cref="JsonNode"/> representation of <paramref name="json"/>.</returns>
public static JsonNode Parse(string json, JsonDocumentOptions options = default, DuplicatePropertyNameHandling duplicatePropertyNameHandling = DuplicatePropertyNameHandling.Replace)
{
Utf8JsonReader reader = new Utf8JsonReader(Encoding.UTF8.GetBytes(json), options.GetReaderOptions());
var currentNodes = new Stack <KeyValuePair <string, JsonNode> >(); // nodes currently being created
JsonNode toReturn = null;
while (reader.Read())
{
JsonTokenType tokenType = reader.TokenType;
KeyValuePair <string, JsonNode> currentPair = new KeyValuePair <string, JsonNode>();
if (currentNodes.Any())
{
currentPair = currentNodes.Peek();
}
void AddNewPair(JsonNode jsonNode, bool keepInCurrentNodes = false)
{
KeyValuePair <string, JsonNode> newProperty;
if (currentPair.Value == null)
{
// If previous token was property name,
// it was added to stack with not null name and null value,
// otherwise, this is first JsonNode added
if (currentPair.Key != null)
{
// Create as property, keep name, replace null with new JsonNode:
currentNodes.Pop();
newProperty = new KeyValuePair <string, JsonNode>(currentPair.Key, jsonNode);
}
else
{
// Add first JsonNode:
newProperty = new KeyValuePair <string, JsonNode>(null, jsonNode);
}
}
else
{
// Create as value:
newProperty = new KeyValuePair <string, JsonNode>(null, jsonNode);
}
if (keepInCurrentNodes)
{
// If after adding property, it should be kept in currentNodes, it must be JsonObject or JsonArray
Debug.Assert(jsonNode.ValueKind == JsonValueKind.Object || jsonNode.ValueKind == JsonValueKind.Array);
currentNodes.Push(newProperty);
}
else
{
AddToParent(newProperty, ref currentNodes, ref toReturn, duplicatePropertyNameHandling);
}
}
switch (tokenType)
{
case JsonTokenType.StartObject:
AddNewPair(new JsonObject(), true);
break;
case JsonTokenType.EndObject:
Debug.Assert(currentPair.Value is JsonObject);
currentNodes.Pop();
AddToParent(currentPair, ref currentNodes, ref toReturn, duplicatePropertyNameHandling);
break;
case JsonTokenType.StartArray:
AddNewPair(new JsonArray(), true);
break;
case JsonTokenType.EndArray:
Debug.Assert(currentPair.Value is JsonArray);
currentNodes.Pop();
AddToParent(currentPair, ref currentNodes, ref toReturn, duplicatePropertyNameHandling);
break;
case JsonTokenType.PropertyName:
currentNodes.Push(new KeyValuePair <string, JsonNode>(reader.GetString(), null));
break;
case JsonTokenType.Number:
AddNewPair(new JsonNumber(JsonHelpers.Utf8GetString(reader.ValueSpan)));
break;
case JsonTokenType.String:
AddNewPair(new JsonString(reader.GetString()));
break;
case JsonTokenType.True:
AddNewPair(new JsonBoolean(true));
break;
case JsonTokenType.False:
AddNewPair(new JsonBoolean(false));
break;
case JsonTokenType.Null:
AddNewPair(new JsonNull());
break;
}
}
Debug.Assert(toReturn != null);
return(toReturn);
}
