internal void InitializeConstructorParameters(JsonParameterInfoValues[] jsonParameters, bool sourceGenMode = false)
{
var parameterCache = new JsonPropertyDictionary <JsonParameterInfo>(Options.PropertyNameCaseInsensitive, jsonParameters.Length);
// Cache the lookup from object property name to JsonPropertyInfo using a case-insensitive comparer.
// Case-insensitive is used to support both camel-cased parameter names and exact matches when C#
// record types or anonymous types are used.
// The property name key does not use [JsonPropertyName] or PropertyNamingPolicy since we only bind
// the parameter name to the object property name and do not use the JSON version of the name here.
var nameLookup = new Dictionary <ParameterLookupKey, ParameterLookupValue>(PropertyCache !.Count);
foreach (KeyValuePair <string, JsonPropertyInfo?> kvp in PropertyCache.List)
{
JsonPropertyInfo jsonProperty = kvp.Value !;
string propertyName = jsonProperty.ClrName !;
ParameterLookupKey key = new(propertyName, jsonProperty.PropertyType);
ParameterLookupValue value = new(jsonProperty);
if (!JsonHelpers.TryAdd(nameLookup, key, value))
{
// More than one property has the same case-insensitive name and Type.
// Remember so we can throw a nice exception if this property is used as a parameter name.
ParameterLookupValue existing = nameLookup[key];
existing.DuplicateName = propertyName;
}
}
foreach (JsonParameterInfoValues parameterInfo in jsonParameters)
{
ParameterLookupKey paramToCheck = new(parameterInfo.Name, parameterInfo.ParameterType);
if (nameLookup.TryGetValue(paramToCheck, out ParameterLookupValue? matchingEntry))
{
if (matchingEntry.DuplicateName != null)
{
// Multiple object properties cannot bind to the same constructor parameter.
ThrowHelper.ThrowInvalidOperationException_MultiplePropertiesBindToConstructorParameters(
Type,
parameterInfo.Name !,
matchingEntry.JsonPropertyInfo.Name,
matchingEntry.DuplicateName);
}
Debug.Assert(matchingEntry.JsonPropertyInfo != null);
JsonPropertyInfo jsonPropertyInfo = matchingEntry.JsonPropertyInfo;
JsonParameterInfo jsonParameterInfo = CreateConstructorParameter(parameterInfo, jsonPropertyInfo, sourceGenMode, Options);
parameterCache.Add(jsonPropertyInfo.Name, jsonParameterInfo);
}
// It is invalid for the extension data property to bind with a constructor argument.
else if (DataExtensionProperty != null &&
StringComparer.OrdinalIgnoreCase.Equals(paramToCheck.Name, DataExtensionProperty.Name))
{
ThrowHelper.ThrowInvalidOperationException_ExtensionDataCannotBindToCtorParam(DataExtensionProperty);
}
}
ParameterCount = jsonParameters.Length;
Volatile.Write(ref ParameterCache, parameterCache);
}
// Create a parameter that is ignored at run-time. It uses the same type (typeof(sbyte)) to help
// prevent issues with unsupported types and helps ensure we don't accidently (de)serialize it.
public static JsonParameterInfo CreateIgnoredParameterPlaceholder(JsonParameterInfoValues parameterInfo, JsonPropertyInfo matchingProperty)
{
JsonParameterInfo jsonParameterInfo = matchingProperty.ConverterBase.CreateJsonParameterInfo();
jsonParameterInfo.ClrInfo = parameterInfo;
jsonParameterInfo.RuntimePropertyType = matchingProperty.RuntimePropertyType !;
jsonParameterInfo.NameAsUtf8Bytes = matchingProperty.NameAsUtf8Bytes !;
jsonParameterInfo.InitializeDefaultValue(matchingProperty);
return(jsonParameterInfo);
}
private static JsonParameterInfo CreateConstructorParameter(
JsonParameterInfoValues parameterInfo,
JsonPropertyInfo jsonPropertyInfo,
bool sourceGenMode,
JsonSerializerOptions options)
{
if (jsonPropertyInfo.IsIgnored)
{
return(JsonParameterInfo.CreateIgnoredParameterPlaceholder(parameterInfo, jsonPropertyInfo, sourceGenMode));
}
JsonConverter converter = jsonPropertyInfo.ConverterBase;
JsonParameterInfo jsonParameterInfo = converter.CreateJsonParameterInfo();
jsonParameterInfo.Initialize(parameterInfo, jsonPropertyInfo, options);
return(jsonParameterInfo);
}
/// <summary>
/// Create a parameter that is ignored at run time. It uses the same type (typeof(sbyte)) to help
/// prevent issues with unsupported types and helps ensure we don't accidently (de)serialize it.
/// </summary>
public static JsonParameterInfo CreateIgnoredParameterPlaceholder(
JsonParameterInfoValues parameterInfo,
JsonPropertyInfo matchingProperty,
bool sourceGenMode)
{
JsonParameterInfo jsonParameterInfo = new JsonParameterInfo <sbyte>();
jsonParameterInfo.ClrInfo = parameterInfo;
jsonParameterInfo.PropertyType = matchingProperty.PropertyType;
jsonParameterInfo.NameAsUtf8Bytes = matchingProperty.NameAsUtf8Bytes !;
// TODO: https://github.com/dotnet/runtime/issues/60082.
// Default value initialization for params mapping to ignored properties doesn't
// account for the default value of optional parameters. This should be fixed.
if (sourceGenMode)
{
// The <T> value in the matching JsonPropertyInfo<T> instance matches the parameter type.
jsonParameterInfo.DefaultValue = matchingProperty.DefaultValue;
}
else
{
// The <T> value in the created JsonPropertyInfo<T> instance (sbyte)
// doesn't match the parameter type, use reflection to get the default value.
Type parameterType = parameterInfo.ParameterType;
DefaultValueHolder holder;
if (matchingProperty.Options.TryGetJsonTypeInfo(parameterType, out JsonTypeInfo? typeInfo))
{
holder = typeInfo.DefaultValueHolder;
}
else
{
holder = DefaultValueHolder.CreateHolder(parameterInfo.ParameterType);
}
jsonParameterInfo.DefaultValue = holder.DefaultValue;
}
return(jsonParameterInfo);
}