public ExpandClauseParser(IOpenApiTypeHandler binder, string value,
IDictionary <PropertyInfo, ExpandClause> clauses, ModelStateDictionary modelStateDictionary)
{
_parser = new QueryExpressionParser(value, binder);
_clauses = clauses;
_modelStateDictionary = modelStateDictionary;
}
public static object ReadObject(
JsonElement obj,
IOpenApiType itemType,
Type itemClrType,
IOpenApiTypeHandler typeHandler,
bool objectAsDelta = false)
{
if (itemType == null)
{
throw new SerializationException("Cannot deserialize unknown type.");
}
var properties = obj.EnumerateObject().ToDictionary(p => p.Name, p => p.Value);
if (properties.TryGetValue("@odata.type", out var type) && type.ValueKind == JsonValueKind.String)
{
var typeName = type.GetString();
var actualType = typeHandler.ResolveType(typeName);
if (actualType == null)
{
throw new SerializationException($"No type with identifier '{typeName}' found");
}
if (!itemClrType.IsAssignableFrom(actualType.ClrType))
{
throw new SerializationException($"Type '{typeName}' is not assignable to '{itemType.JsonName}'");
}
itemType = actualType;
itemClrType = actualType.ClrType;
}
var instance = objectAsDelta
? Activator.CreateInstance(typeof(Delta <>).MakeGenericType(itemClrType))
: Activator.CreateInstance(itemClrType);
foreach (var member in properties)
{
if (itemType.TryGetProperty(member.Key, out var property))
{
var propertyType = typeHandler.ResolveType(property.ClrProperty.PropertyType);
var value = ReadValue(member.Value,
propertyType,
property.ClrProperty.PropertyType,
typeHandler,
objectAsDelta);
// TODO: check for components in the model binding area which help us here
// many conversions (string -> enum,date,timespan) etc. do not work like this.
property.SetValue(instance, value);
}
else
{
// TODO: how do we want to treat unknown props? fail or ignore?
}
}
return(instance);
}
public static void WriteArray(
Utf8JsonWriter writer,
IEnumerable resultItems,
IOpenApiType itemType,
SelectClause selectClause,
IOpenApiTypeHandler typeHandler,
JsonSerializerOptions options)
{
writer.WriteStartArray();
foreach (var item in resultItems)
{
WriteValue(writer, itemType, item, selectClause, typeHandler, options);
}
writer.WriteEndArray();
}
public static void WriteObject(
Utf8JsonWriter writer,
IOpenApiType itemType,
object item,
SelectClause selectClause,
IOpenApiTypeHandler typeHandler,
JsonSerializerOptions options)
{
if (item == null)
{
writer.WriteNullValue();
}
else
{
writer.WriteStartObject();
var actualType = typeHandler.ResolveType(item.GetType());
var needsType = itemType == null || !itemType.Equals(actualType);
if (needsType)
{
writer.WriteString("@odata.type", actualType.JsonName);
}
foreach (var property in actualType.Properties)
{
SelectClause subClause = null;
if (selectClause == null ||
selectClause.SelectClauses?.TryGetValue(property.ClrProperty, out subClause) == true ||
selectClause.IsStarSelect)
{
var key = options.PropertyNamingPolicy.ConvertName(property.JsonName);
writer.WritePropertyName(JsonEncodedText.Encode(key));
WriteValue(writer,
typeHandler.ResolveType(property.ClrProperty.PropertyType),
property.GetValue(item),
subClause,
typeHandler,
options);
}
}
writer.WriteEndObject();
}
}
public static object ReadValue(
JsonElement value,
IOpenApiType valueType,
Type valueClrType,
IOpenApiTypeHandler typeHandler,
bool objectsAsDelta = false)
{
switch (value.ValueKind)
{
case JsonValueKind.Object:
if (valueType == null &&
ReflectionHelper.ImplementsDictionary(valueClrType, out var dictKeyType, out var dictValueType))
{
var dictionary = Activator.CreateInstance(valueClrType);
var indexer = valueClrType.GetProperties()
.FirstOrDefault(p => IsDictionaryIndexer(p, dictKeyType, dictValueType));
if (indexer == null)
{
throw new SerializationException(
"Could not find dictionary indexer for deserializing object");
}
var dictValueApiType = typeHandler.ResolveType(dictValueType);
foreach (var prop in value.EnumerateObject())
{
var dictValue = ReadValue(prop.Value,
dictValueApiType,
dictValueType,
typeHandler,
false);
indexer.SetValue(dictionary,
dictValue,
new object[]
{
prop.Name
});
}
return(dictionary);
}
else
{
return(ReadObject(value, valueType, valueClrType, typeHandler, objectsAsDelta));
}
protected T Deserialize <T>(string json, IOpenApiTypeHandler typeHandler = null)
{
if (typeHandler == null)
{
typeHandler = new DefaultOpenApiTypeHandler();
}
var jsonSerializerOptions = new JsonSerializerOptions
{
PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
Converters =
{
new OpenApiQueryDeltaConverterFactory(typeHandler),
new OpenApiQueryResultConverterFactory(typeHandler),
new OpenApiQuerySingleResultConverterFactory(typeHandler)
}
};
return(JsonSerializer.Deserialize <T>(json, jsonSerializerOptions));
}
public static void WriteDictionary(
Utf8JsonWriter writer,
IDictionary value,
IOpenApiType valueType,
IOpenApiTypeHandler typeHandler,
JsonSerializerOptions options)
{
writer.WriteStartObject();
foreach (DictionaryEntry dictionaryEntry in value)
{
var key = options.DictionaryKeyPolicy != null
? options.DictionaryKeyPolicy.ConvertName(dictionaryEntry.Key.ToString())
: dictionaryEntry.Key.ToString();
writer.WritePropertyName(JsonEncodedText.Encode(key));
WriteValue(writer, valueType, dictionaryEntry.Value, null, typeHandler, options);
}
writer.WriteEndObject();
}
public OpenApiQueryResultConverterFactory(IOpenApiTypeHandler typeHandler)
{
_typeHandler = typeHandler;
}
public OpenApiQuerySingleResultConverter(IOpenApiTypeHandler typeHandler)
{
_typeHandler = typeHandler;
}
public OpenApiOptionsSetup(IOpenApiTypeHandler typeHandler)
{
_typeHandler = typeHandler;
}
public SelectClauseParser(IOpenApiTypeHandler binder, string value)
{
_parser = new QueryExpressionParser(value, binder);
}
public QueryExpressionParser(string raw, IOpenApiTypeHandler binder)
{
_value = raw;
_binder = binder;
Init();
}
public OrderByClauseParser(IOpenApiTypeHandler binder, string value, IList <OrderByClause> clauses)
{
_parser = new QueryExpressionParser(value, binder);
_clauses = clauses;
}
public OpenApiQueryApplyResultConverter(IOpenApiTypeHandler typeHandler)
{
_typeHandler = typeHandler;
}
public OpenApiQueryDeltaConverterFactory(IOpenApiTypeHandler typeHandler)
{
_typeHandler = typeHandler;
}
public static void WriteValue(
Utf8JsonWriter writer,
IOpenApiType itemType,
object item,
SelectClause subClause,
IOpenApiTypeHandler typeHandler,
JsonSerializerOptions options)
{
switch (item)
{
// we must handle dictionaries, enumerables etc on our own for proper nested object handling
// maybe we find a better way to utilize the JsonSerializer.Serialize directly without loosing the proper type handling
case string s:
// string is an IEnumerable and needs to be handled special to avoid serialization as array
writer.WriteStringValue(s);
break;
case Delta d:
JsonSerializer.Serialize(writer, d, d.GetType(), options);
break;
case IDictionary c:
if (ReflectionHelper.ImplementsDictionary(c.GetType(), out _, out var valueType))
{
WriteDictionary(writer,
c,
typeHandler.ResolveType(valueType), // use static types for polymorphism
typeHandler,
options);
}
else
{
WriteDictionary(writer, c, null, typeHandler, options);
}
break;
case IEnumerable v:
if (ReflectionHelper.ImplementsEnumerable(v.GetType(), out var enumerableItemType))
{
WriteArray(writer,
v,
typeHandler.ResolveType(enumerableItemType),
subClause,
typeHandler,
options);
}
else
{
WriteArray(writer, v, null, subClause, typeHandler, options);
}
break;
default:
if (itemType == null)
{
// not handled by OpenApiQuery
JsonSerializer.Serialize(writer, item, options);
}
else
{
WriteObject(writer, itemType, item, subClause, typeHandler, options);
}
break;
}
}
