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[C#] support Json Serialization (#5752)

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* support json serialization

* fix invalid json format.
* string must be written with double quotes.
* remove commma after the last object member.

* fix indent

* Revert "fix invalid json format."

This reverts commit d6820ed50c.

* quated string value.

* add cs-gen-json-serializer flag.

* fix preprocessor indent

* ENABLE_JSON_SERIALIZATION -> ENABLE_JSON_SERIALIZATION_TEST

* share TestBuffer method

* remove ENABLE_JSON_SERIALIZATION

* remove duplicated test data

* [windows] add nuget restore and copy test data.

* [docker mono] share msbuild settings with windows. add nuget restore and copy test data.

* add some note for json api.
This commit is contained in:
mugisoba
2020-02-11 10:43:36 +09:00
committed by GitHub
parent 8f56990f6c
commit 173e10fdf1
43 changed files with 680 additions and 42 deletions
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161
src/idl_gen_csharp.cpp
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@@ -271,6 +271,11 @@ class CSharpGenerator : public BaseGenerator {
// That, and Java Enums are expensive, and not universally liked.
GenComment(enum_def.doc_comment, code_ptr, &comment_config);
if (opts.cs_gen_json_serializer && opts.generate_object_based_api) {
code +=
"[Newtonsoft.Json.JsonConverter(typeof(Newtonsoft.Json.Converters."
"StringEnumConverter))]\n";
}
// In C# this indicates enumeration values can be treated as bit flags.
if (enum_def.attributes.Lookup("bit_flags")) {
code += "[System.FlagsAttribute]\n";
@@ -1274,6 +1279,89 @@ class CSharpGenerator : public BaseGenerator {
code += " }\n";
code += " }\n";
code += "}\n\n";
// JsonConverter
if (opts.cs_gen_json_serializer) {
if (enum_def.attributes.Lookup("private")) {
code += "internal ";
} else {
code += "public ";
}
code += "class " + union_name +
"_JsonConverter : Newtonsoft.Json.JsonConverter {\n";
code += " public override bool CanConvert(System.Type objectType) {\n";
code += " return objectType == typeof(" + union_name +
") || objectType == typeof(System.Collections.Generic.List<" +
union_name + ">);\n";
code += " }\n";
code +=
" public override void WriteJson(Newtonsoft.Json.JsonWriter writer, "
"object value, "
"Newtonsoft.Json.JsonSerializer serializer) {\n";
code += " var _olist = value as System.Collections.Generic.List<" +
union_name + ">;\n";
code += " if (_olist != null) {\n";
code += " writer.WriteStartArray();\n";
code +=
" foreach (var _o in _olist) { this.WriteJson(writer, _o, "
"serializer); }\n";
code += " writer.WriteEndArray();\n";
code += " } else {\n";
code += " this.WriteJson(writer, value as " + union_name +
", serializer);\n";
code += " }\n";
code += " }\n";
code += " public void WriteJson(Newtonsoft.Json.JsonWriter writer, " +
union_name +
" _o, "
"Newtonsoft.Json.JsonSerializer serializer) {\n";
code += " if (_o == null) return;\n";
code += " serializer.Serialize(writer, _o.Value);\n";
code += " }\n";
code +=
" public override object ReadJson(Newtonsoft.Json.JsonReader "
"reader, "
"System.Type objectType, "
"object existingValue, Newtonsoft.Json.JsonSerializer serializer) "
"{\n";
code +=
" var _olist = existingValue as System.Collections.Generic.List<" +
union_name + ">;\n";
code += " if (_olist != null) {\n";
code += " for (var _j = 0; _j < _olist.Count; ++_j) {\n";
code += " reader.Read();\n";
code +=
" _olist[_j] = this.ReadJson(reader, _olist[_j], "
"serializer);\n";
code += " }\n";
code += " reader.Read();\n";
code += " return _olist;\n";
code += " } else {\n";
code += " return this.ReadJson(reader, existingValue as " +
union_name + ", serializer);\n";
code += " }\n";
code += " }\n";
code += " public " + union_name +
" ReadJson(Newtonsoft.Json.JsonReader reader, " + union_name +
" _o, Newtonsoft.Json.JsonSerializer serializer) {\n";
code += " if (_o == null) return null;\n";
code += " switch (_o.Type) {\n";
for (auto it = enum_def.Vals().begin(); it != enum_def.Vals().end();
++it) {
auto &ev = **it;
if (ev.union_type.base_type == BASE_TYPE_NONE) {
code += " default: break;\n";
} else {
auto type_name = GenTypeGet_ObjectAPI(ev.union_type, opts);
code += " case " + enum_def.name + "." + ev.name +
": _o.Value = serializer.Deserialize<" + type_name +
">(reader); break;\n";
}
}
code += " }\n";
code += " return _o;\n";
code += " }\n";
code += "}\n\n";
}
}
std::string GenTypeName_ObjectAPI(const std::string &name,
@@ -1794,8 +1882,62 @@ class CSharpGenerator : public BaseGenerator {
if (field.value.type.base_type == BASE_TYPE_UTYPE) continue;
if (field.value.type.element == BASE_TYPE_UTYPE) continue;
auto type_name = GenTypeGet_ObjectAPI(field.value.type, opts);
code += " public " + type_name + " " + MakeCamel(field.name, true) +
" { get; set; }\n";
auto camel_name = MakeCamel(field.name, true);
if (opts.cs_gen_json_serializer) {
if (IsUnion(field.value.type)) {
auto utype_name = WrapInNameSpace(*field.value.type.enum_def);
code +=
" [Newtonsoft.Json.JsonProperty(\"" + field.name + "_type\")]\n";
if (field.value.type.base_type == BASE_TYPE_VECTOR) {
code += " private " + utype_name + "[] " + camel_name + "Type {\n";
code += " get {\n";
code += " if (this." + camel_name + " == null) return null;\n";
code += " var _o = new " + utype_name + "[this." + camel_name +
".Count];\n";
code +=
" for (var _j = 0; _j < _o.Length; ++_j) { _o[_j] = "
"this." +
camel_name + "[_j].Type; }\n";
code += " return _o;\n";
code += " }\n";
code += " set {\n";
code += " this." + camel_name + " = new List<" + utype_name +
"Union>();\n";
code += " for (var _j = 0; _j < value.Length; ++_j) {\n";
code += " var _o = new " + utype_name + "Union();\n";
code += " _o.Type = value[_j];\n";
code += " this." + camel_name + ".Add(_o);\n";
code += " }\n";
code += " }\n";
code += " }\n";
} else {
code += " private " + utype_name + " " + camel_name + "Type {\n";
code += " get {\n";
code += " return this." + camel_name + " != null ? this." +
camel_name + ".Type : " + utype_name + ".NONE;\n";
code += " }\n";
code += " set {\n";
code += " this." + camel_name + " = new " + utype_name +
"Union();\n";
code += " this." + camel_name + ".Type = value;\n";
code += " }\n";
code += " }\n";
}
}
code += " [Newtonsoft.Json.JsonProperty(\"" + field.name + "\")]\n";
if (IsUnion(field.value.type)) {
auto union_name =
(field.value.type.base_type == BASE_TYPE_VECTOR)
? GenTypeGet_ObjectAPI(field.value.type.VectorType(), opts)
: type_name;
code += " [Newtonsoft.Json.JsonConverter(typeof(" + union_name +
"_JsonConverter))]\n";
}
if (field.attributes.Lookup("hash")) {
code += " [Newtonsoft.Json.JsonIgnore()]\n";
}
}
code += " public " + type_name + " " + camel_name + " { get; set; }\n";
}
// Generate Constructor
code += "\n";
@@ -1833,6 +1975,21 @@ class CSharpGenerator : public BaseGenerator {
}
}
code += " }\n";
// Generate Serialization
if (opts.cs_gen_json_serializer &&
parser_.root_struct_def_ == &struct_def) {
code += "\n";
code += " public static " + class_name +
" DeserializeFromJson(string jsonText) {\n";
code += " return Newtonsoft.Json.JsonConvert.DeserializeObject<" +
class_name + ">(jsonText);\n";
code += " }\n";
code += " public string SerializeToJson() {\n";
code +=
" return Newtonsoft.Json.JsonConvert.SerializeObject(this, "
"Newtonsoft.Json.Formatting.Indented);\n";
code += " }\n";
}
code += "}\n\n";
}