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apache / thrift / 4a280d56cca90296228ca29c7c582fa423d74e1f / . / compiler / cpp / src / thrift / generate / t_dart_generator.cc
blob: 00550438ed21c9efe75460167c164a062da1ef1e [file] [log] [blame]
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
#include <sstream>
#include <string>
#include <fstream>
#include <iostream>
#include <vector>
#include <cctype>
#include <sys/stat.h>
#include <stdexcept>
#include "thrift/platform.h"
#include "thrift/generate/t_oop_generator.h"
using std::map;
using std::ostream;
using std::ostringstream;
using std::string;
using std::stringstream;
using std::vector;
/**
* Use the current Thrift version for static libraries. When releasing, update
* the version in these files.
* - lib/dart/pubspec.yaml
* - test/dart/test_client/pubspec.yaml
* - tutorial/dart/client/pubspec.yaml
* - tutorial/dart/console_client/pubspec.yaml
* - tutorial/dart/server/pubspec.yaml
* See https://thrift.apache.org/docs/committers/HowToVersion
*/
static const string dart_thrift_version = THRIFT_VERSION;
/* forward declarations */
string initial_caps_to_underscores(string name);
/**
* Dart code generator
*
*/
class t_dart_generator : public t_oop_generator {
public:
t_dart_generator(t_program* program,
const std::map<std::string, std::string>& parsed_options,
const std::string& option_string)
: t_oop_generator(program) {
(void)option_string;
std::map<std::string, std::string>::const_iterator iter;
library_name_ = "";
library_prefix_ = "";
package_prefix_ = "";
pubspec_lib_ = "";
for( iter = parsed_options.begin(); iter != parsed_options.end(); ++iter) {
if( iter->first.compare("library_name") == 0) {
library_name_ = (iter->second);
} else if( iter->first.compare("library_prefix") == 0) {
library_prefix_ = (iter->second) + ".";
package_prefix_ = replace_all(library_prefix_, ".", "/");
} else if( iter->first.compare("pubspec_lib") == 0) {
pubspec_lib_ = (iter->second);
} else {
throw "unknown option dart:" + iter->first;
}
}
out_dir_base_ = "gen-dart";
}
void scope_up(std::ostream& out, std::string prefix=" ") {
out << prefix << "{" << '\n';
indent_up();
}
void scope_down(std::ostream& out, std::string postfix="\n") {
indent_down();
indent(out) << "}" << postfix;
}
string replace_all(string contents, string search, string repl) {
string str(contents);
size_t slen = search.length();
size_t rlen = repl.length();
size_t incr = (rlen > 0) ? rlen : 1;
if (slen > 0) {
size_t found = str.find(search);
while ((found != string::npos) && (found < str.length())) {
str.replace(found, slen, repl);
found = str.find(search, found + incr);
}
}
return str;
}
/**
* Init and close methods
*/
void init_generator() override;
void close_generator() override;
std::string display_name() const override;
void export_class_to_library(string file_name, string class_name);
void generate_dart_library();
void generate_dart_pubspec();
void generate_consts(std::vector<t_const*> consts) override;
/**
* Program-level generation functions
*/
void generate_typedef(t_typedef* ttypedef) override;
void generate_enum(t_enum* tenum) override;
void generate_struct(t_struct* tstruct) override;
void generate_xception(t_struct* txception) override;
void generate_service(t_service* tservice) override;
void print_const_value(std::ostream& out,
std::string name,
t_type* type,
t_const_value* value,
bool in_static,
bool defval = false);
std::string render_const_value(ostream& out,
std::string name,
t_type* type,
t_const_value* value);
/**
* Service-level generation functions
*/
void generate_dart_struct(t_struct* tstruct, bool is_exception);
void generate_dart_struct_definition(std::ostream& out,
t_struct* tstruct,
bool is_xception = false,
bool is_result = false,
string export_file_name = "");
void generate_dart_struct_reader(std::ostream& out, t_struct* tstruct);
void generate_dart_validator(std::ostream& out, t_struct* tstruct);
void generate_dart_struct_result_writer(std::ostream& out, t_struct* tstruct);
void generate_dart_struct_writer(std::ostream& out, t_struct* tstruct);
void generate_dart_struct_tostring(std::ostream& out, t_struct* tstruct);
std::string get_dart_type_string(t_type* type);
void generate_generic_field_getters(std::ostream& out, t_struct* tstruct);
void generate_generic_field_setters(std::ostream& out, t_struct* tstruct);
void generate_generic_isset_method(std::ostream& out, t_struct* tstruct);
void generate_dart_bean_boilerplate(std::ostream& out, t_struct* tstruct);
void generate_function_helpers(t_function* tfunction);
std::string init_value(t_field* tfield);
std::string get_cap_name(std::string name);
std::string get_member_name(std::string name);
std::string get_args_class_name(std::string name);
std::string get_result_class_name(std::string name);
std::string get_file_name(std::string name);
std::string get_constants_class_name(std::string name);
std::string generate_isset_check(t_field* field);
std::string generate_isset_check(std::string field);
void generate_isset_set(ostream& out, t_field* field);
void generate_service_interface(t_service* tservice);
void generate_service_helpers(t_service* tservice);
void generate_service_client(t_service* tservice);
void generate_service_server(t_service* tservice);
void generate_process_function(t_service* tservice, t_function* tfunction);
/**
* Serialization constructs
*/
void generate_deserialize_field(std::ostream& out, t_field* tfield, std::string prefix = "");
void generate_deserialize_struct(std::ostream& out, t_struct* tstruct, std::string prefix = "");
void generate_deserialize_container(std::ostream& out, t_type* ttype, std::string prefix = "");
void generate_deserialize_set_element(std::ostream& out, t_set* tset, std::string prefix = "");
void generate_deserialize_map_element(std::ostream& out, t_map* tmap, std::string prefix = "");
void generate_deserialize_list_element(std::ostream& out,
t_list* tlist,
std::string prefix = "");
void generate_serialize_field(std::ostream& out, t_field* tfield, std::string prefix = "");
void generate_serialize_struct(std::ostream& out, t_struct* tstruct, std::string prefix = "");
void generate_serialize_container(std::ostream& out, t_type* ttype, std::string prefix = "");
void generate_serialize_map_element(std::ostream& out,
t_map* tmap,
std::string iter,
std::string map);
void generate_serialize_set_element(std::ostream& out, t_set* tmap, std::string iter);
void generate_serialize_list_element(std::ostream& out, t_list* tlist, std::string iter);
void generate_dart_doc(std::ostream& out, t_doc* tdoc);
void generate_dart_doc(std::ostream& out, t_function* tdoc);
/**
* Helper rendering functions
*/
std::string find_library_name(t_program* program);
std::string dart_library(string file_name);
std::string service_imports();
std::string dart_thrift_imports();
std::string type_name(t_type* ttype);
std::string base_type_name(t_base_type* tbase);
std::string declare_field(t_field* tfield, bool init = false);
std::string function_signature(t_function* tfunction);
std::string argument_list(t_struct* tstruct);
std::string type_to_enum(t_type* ttype);
std::string get_ttype_class_name(t_type* ttype);
bool type_can_be_null(t_type* ttype) {
ttype = get_true_type(ttype);
return ttype->is_container() || ttype->is_struct() || ttype->is_xception()
|| ttype->is_string();
}
vector<std::string> split(const string& s, char delim) {
vector<std::string> elems;
stringstream ss(s);
string item;
while (getline(ss, item, delim)) {
elems.push_back(item);
}
return elems;
}
std::string constant_name(std::string name);
private:
ofstream_with_content_based_conditional_update f_service_;
std::string library_name_;
std::string library_prefix_;
std::string package_prefix_;
std::string pubspec_lib_;
std::string base_dir_;
std::string src_dir_;
std::string library_exports_;
};
/**
* Prepares for file generation by opening up the necessary file output
* streams.
*
* @param tprogram The program to generate
*/
void t_dart_generator::init_generator() {
MKDIR(get_out_dir().c_str());
if (library_name_.empty()) {
library_name_ = find_library_name(program_);
}
string subdir = get_out_dir() + "/" + library_name_;
MKDIR(subdir.c_str());
base_dir_ = subdir;
if (library_prefix_.empty()) {
subdir += "/lib";
MKDIR(subdir.c_str());
subdir += "/src";
MKDIR(subdir.c_str());
src_dir_ = subdir;
} else {
src_dir_ = base_dir_;
}
}
string t_dart_generator::find_library_name(t_program* program) {
string name = program->get_namespace("dart");
if (name.empty()) {
name = program->get_name();
}
name = replace_all(name, ".", "_");
name = replace_all(name, "-", "_");
return name;
}
/**
* The Dart library
*
* @return String of the library, e.g. "library myservice;"
*/
string t_dart_generator::dart_library(string file_name) {
string out = "library " + library_prefix_ + library_name_;
if (!file_name.empty()) {
if (library_prefix_.empty()) {
out += ".src." + file_name;
} else {
out += "." + file_name;
}
}
return out + ";\n";
}
/**
* Prints imports for services
*
* @return List of imports for services
*/
string t_dart_generator::service_imports() {
return string("import 'dart:async';") + "\n";
}
/**
* Prints standard dart imports
*
* @return List of imports necessary for thrift
*/
string t_dart_generator::dart_thrift_imports() {
string imports = string("import 'dart:typed_data' show Uint8List;") + "\n" +
string("import 'package:thrift/thrift.dart';") + "\n";
// add import for this library
if (package_prefix_.empty()) {
imports += "import 'package:" + library_name_ + "/" + library_name_ + ".dart';" + "\n";
} else {
imports += "import 'package:" + package_prefix_ + library_name_ + ".dart';" + "\n";
}
// add imports for included thrift files
const vector<t_program*>& includes = program_->get_includes();
for (auto include : includes) {
string include_name = find_library_name(include);
string named_import = "t_" + include_name;
if (package_prefix_.empty()) {
imports += "import 'package:" + include_name + "/" + include_name + ".dart' as " + named_import + ";" + "\n";
} else {
imports += "import 'package:" + package_prefix_ + include_name + ".dart' as " + named_import + ";" + "\n";
}
}
return imports;
}
/**
* Not used
*/
void t_dart_generator::close_generator() {
generate_dart_library();
if (library_prefix_.empty()) {
generate_dart_pubspec();
}
}
void t_dart_generator::generate_dart_library() {
string f_library_name;
if (library_prefix_.empty()) {
f_library_name = base_dir_ + "/lib/" + library_name_ + ".dart";
} else {
f_library_name = get_out_dir() + "/" + library_name_ + ".dart";
}
ofstream_with_content_based_conditional_update f_library;
f_library.open(f_library_name.c_str());
f_library << autogen_comment() << '\n';
f_library << "library " << library_prefix_ << library_name_ << ";" << '\n' << '\n';
f_library << library_exports_;
f_library.close();
}
void t_dart_generator::export_class_to_library(string file_name, string class_name) {
string subdir;
if (library_prefix_.empty()) {
subdir = "src";
} else {
subdir = library_name_;
}
library_exports_ += "export '" + subdir + "/" + file_name + ".dart' show " + class_name + ";" + "\n";
}
void t_dart_generator::generate_dart_pubspec() {
string f_pubspec_name = base_dir_ + "/pubspec.yaml";
ofstream_with_content_based_conditional_update f_pubspec;
f_pubspec.open(f_pubspec_name.c_str());
indent(f_pubspec) << "name: " << library_name_ << '\n';
indent(f_pubspec) << "version: 0.0.1" << '\n';
indent(f_pubspec) << "description: Autogenerated by Thrift Compiler" << '\n';
f_pubspec << '\n';
indent(f_pubspec) << "environment:" << '\n';
indent_up();
indent(f_pubspec) << "sdk: '>=1.24.3 <3.0.0'" << '\n';
indent_down();
f_pubspec << '\n';
indent(f_pubspec) << "dependencies:" << '\n';
indent_up();
if (pubspec_lib_.empty()) {
// default to relative path within working directory, which works for tests
indent(f_pubspec) << "thrift: # ^" << dart_thrift_version << '\n';
indent_up();
indent(f_pubspec) << "path: ../../../../lib/dart" << '\n';
indent_down();
} else {
const vector<std::string> lines = split(pubspec_lib_, '|');
for (const auto & line : lines) {
indent(f_pubspec) << line << '\n';
}
}
// add included thrift files as dependencies
const vector<t_program*>& includes = program_->get_includes();
for (auto include : includes) {
string include_name = find_library_name(include);
indent(f_pubspec) << include_name << ":" << '\n';
indent_up();
indent(f_pubspec) << "path: ../" << include_name << '\n';
indent_down();
}
indent_down();
f_pubspec << '\n';
f_pubspec.close();
}
/**
* Not used
*
* @param ttypedef The type definition
*/
void t_dart_generator::generate_typedef(t_typedef* ttypedef) {
(void)ttypedef;
}
/**
* Enums are a class with a set of static constants.
*
* @param tenum The enumeration
*/
void t_dart_generator::generate_enum(t_enum* tenum) {
// Make output file
string file_name = get_file_name(tenum->get_name());
string f_enum_name = src_dir_ + "/" + file_name + ".dart";
ofstream_with_content_based_conditional_update f_enum;
f_enum.open(f_enum_name.c_str());
// Comment and add library
f_enum << autogen_comment() << dart_library(file_name) << '\n';
string class_name = tenum->get_name();
export_class_to_library(file_name, class_name);
f_enum << "class " << class_name;
scope_up(f_enum);
vector<t_enum_value*> constants = tenum->get_constants();
vector<t_enum_value*>::iterator c_iter;
for (c_iter = constants.begin(); c_iter != constants.end(); ++c_iter) {
int value = (*c_iter)->get_value();
indent(f_enum) << "static const int " << (*c_iter)->get_name() << " = " << value << ";"
<< '\n';
}
// Create a static Set with all valid values for this enum
f_enum << '\n';
indent(f_enum) << "static final Set<int> VALID_VALUES = new Set.from([" << '\n';
indent_up();
bool firstValue = true;
for (c_iter = constants.begin(); c_iter != constants.end(); ++c_iter) {
// populate set
indent(f_enum) << (firstValue ? "" : ", ");
f_enum << (*c_iter)->get_name() << '\n';
firstValue = false;
}
indent_down();
indent(f_enum) << "]);" << '\n';
indent(f_enum) << "static final Map<int, String> VALUES_TO_NAMES = {" << '\n';
indent_up();
firstValue = true;
for (c_iter = constants.begin(); c_iter != constants.end(); ++c_iter) {
indent(f_enum) << (firstValue ? "" : ", ");
f_enum << (*c_iter)->get_name() << ": '" << (*c_iter)->get_name() << "'" << '\n';
firstValue = false;
}
indent_down();
indent(f_enum) << "};" << '\n';
scope_down(f_enum); // end class
f_enum.close();
}
/**
* Generates a class that holds all the constants.
*/
void t_dart_generator::generate_consts(std::vector<t_const*> consts) {
if (consts.empty()) {
return;
}
string class_name = get_constants_class_name(program_name_);
string file_name = get_file_name(class_name);
string f_consts_name = src_dir_ + "/" + file_name + ".dart";
ofstream_with_content_based_conditional_update f_consts;
f_consts.open(f_consts_name.c_str());
// Print header
f_consts << autogen_comment() << dart_library(file_name) << '\n';
f_consts << dart_thrift_imports() << '\n';
export_class_to_library(file_name, class_name);
indent(f_consts) << "class " << class_name;
scope_up(f_consts);
vector<t_const*>::iterator c_iter;
for (c_iter = consts.begin(); c_iter != consts.end(); ++c_iter) {
print_const_value(f_consts,
(*c_iter)->get_name(),
(*c_iter)->get_type(),
(*c_iter)->get_value(),
false);
f_consts << '\n';
}
scope_down(f_consts);
f_consts.close();
}
void t_dart_generator::print_const_value(std::ostream& out,
string name,
t_type* type,
t_const_value* value,
bool in_static,
bool defval) {
type = get_true_type(type);
indent(out);
if (!defval) {
out << (in_static ? "var " : "static final ");
}
if (type->is_base_type()) {
if (!defval) {
out << type_name(type) << " ";
}
string v2 = render_const_value(out, name, type, value);
out << name;
out << " = " << v2 << ";" << '\n' << '\n';
} else if (type->is_enum()) {
if (!defval) {
out << type_name(type) << " ";
}
out << name;
out << " = " << value->get_integer() << ";" << '\n' << '\n';
} else if (type->is_struct() || type->is_xception()) {
const vector<t_field*>& fields = ((t_struct*)type)->get_members();
vector<t_field*>::const_iterator f_iter;
const map<t_const_value*, t_const_value*, t_const_value::value_compare>& val = value->get_map();
map<t_const_value*, t_const_value*, t_const_value::value_compare>::const_iterator v_iter;
out << type_name(type) << " " << name << " = new " << type_name(type) << "()";
indent_up();
for (v_iter = val.begin(); v_iter != val.end(); ++v_iter) {
t_type* field_type = nullptr;
for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
if ((*f_iter)->get_name() == v_iter->first->get_string()) {
field_type = (*f_iter)->get_type();
}
}
if (field_type == nullptr) {
throw "type error: " + type->get_name() + " has no field " + v_iter->first->get_string();
}
string val = render_const_value(out, name, field_type, v_iter->second);
out << '\n';
indent(out) << ".." << v_iter->first->get_string() << " = " << val;
}
indent_down();
out << ";" << '\n';
} else if (type->is_map()) {
if (!defval) {
out << type_name(type) << " ";
}
out << name << " =";
scope_up(out);
t_type* ktype = ((t_map*)type)->get_key_type();
t_type* vtype = ((t_map*)type)->get_val_type();
const map<t_const_value*, t_const_value*, t_const_value::value_compare>& val = value->get_map();
map<t_const_value*, t_const_value*, t_const_value::value_compare>::const_iterator v_iter;
for (v_iter = val.begin(); v_iter != val.end(); ++v_iter) {
string key = render_const_value(out, name, ktype, v_iter->first);
string val = render_const_value(out, name, vtype, v_iter->second);
indent(out) << key << ": " << val << "," << '\n';
}
scope_down(out, string(";") + "\n");
out << '\n';
} else if (type->is_list() || type->is_set()) {
if (!defval) {
out << type_name(type) << " ";
}
out << name << " = ";
t_type* etype;
if (type->is_list()) {
out << "[" << '\n';
etype = ((t_list*)type)->get_elem_type();
} else {
out << "new " << type_name(type) << ".from([" << '\n';
etype = ((t_set*)type)->get_elem_type();
}
const vector<t_const_value*>& val = value->get_list();
vector<t_const_value*>::const_iterator v_iter;
indent_up();
for (v_iter = val.begin(); v_iter != val.end(); ++v_iter) {
string val = render_const_value(out, name, etype, *v_iter);
indent(out) << val << "," << '\n';
}
indent_down();
if (type->is_list()) {
indent(out) << "];" << '\n';
} else {
indent(out) << "]);" << '\n';
}
} else {
throw "compiler error: no const of type " + type->get_name();
}
}
string t_dart_generator::render_const_value(ostream& out,
string name,
t_type* type,
t_const_value* value) {
(void)name;
type = get_true_type(type);
std::ostringstream render;
if (type->is_base_type()) {
t_base_type::t_base tbase = ((t_base_type*)type)->get_base();
switch (tbase) {
case t_base_type::TYPE_STRING:
render << "'" << get_escaped_string(value) << "'";
break;
case t_base_type::TYPE_BOOL:
render << ((value->get_integer() > 0) ? "true" : "false");
break;
case t_base_type::TYPE_I8:
case t_base_type::TYPE_I16:
case t_base_type::TYPE_I32:
case t_base_type::TYPE_I64:
render << value->get_integer();
break;
case t_base_type::TYPE_DOUBLE:
if (value->get_type() == t_const_value::CV_INTEGER) {
render << value->get_integer();
} else {
render << value->get_double();
}
break;
default:
throw "compiler error: no const of base type " + t_base_type::t_base_name(tbase);
}
} else if (type->is_enum()) {
render << value->get_integer();
} else {
string t = tmp("tmp");
print_const_value(out, t, type, value, true);
out << '\n';
render << t;
}
return render.str();
}
/**
* Generates a struct definition for a thrift data type. This is a class
* with data members, read(), write(), and an inner Isset class.
*
* @param tstruct The struct definition
*/
void t_dart_generator::generate_struct(t_struct* tstruct) {
generate_dart_struct(tstruct, false);
}
/**
* Exceptions are structs, but they inherit from Exception
*
* @param tstruct The struct definition
*/
void t_dart_generator::generate_xception(t_struct* txception) {
generate_dart_struct(txception, true);
}
/**
* Dart struct definition.
*
* @param tstruct The struct definition
*/
void t_dart_generator::generate_dart_struct(t_struct* tstruct, bool is_exception) {
string file_name = get_file_name(tstruct->get_name());
string f_struct_name = src_dir_ + "/" + file_name + ".dart";
ofstream_with_content_based_conditional_update f_struct;
f_struct.open(f_struct_name.c_str());
f_struct << autogen_comment() << dart_library(file_name) << '\n';
string imports;
f_struct << dart_thrift_imports() << '\n';
generate_dart_struct_definition(f_struct, tstruct, is_exception, false, file_name);
f_struct.close();
}
/**
* Dart struct definition. This has various parameters, as it could be
* generated standalone or inside another class as a helper. If it
* is a helper than it is a static class.
*
* @param tstruct The struct definition
* @param is_exception Is this an exception?
* @param in_class If inside a class, needs to be static class
* @param is_result If this is a result it needs a different writer
*/
void t_dart_generator::generate_dart_struct_definition(ostream& out,
t_struct* tstruct,
bool is_exception,
bool is_result,
string export_file_name) {
generate_dart_doc(out, tstruct);
string class_name = tstruct->get_name();
if (!export_file_name.empty()) {
export_class_to_library(export_file_name, class_name);
}
indent(out) << "class " << class_name << " ";
out << "implements TBase";
if (is_exception) {
out << ", Exception ";
}
scope_up(out);
indent(out) << "static final TStruct _STRUCT_DESC = new TStruct(\"" << class_name
<< "\");" << '\n';
// Members are public for -dart, private for -dartbean
const vector<t_field*>& members = tstruct->get_members();
vector<t_field*>::const_iterator m_iter;
for (m_iter = members.begin(); m_iter != members.end(); ++m_iter) {
indent(out) << "static final TField _" << constant_name((*m_iter)->get_name())
<< "_FIELD_DESC = new TField(\"" << (*m_iter)->get_name() << "\", "
<< type_to_enum((*m_iter)->get_type()) << ", " << (*m_iter)->get_key() << ");"
<< '\n';
}
out << '\n';
for (m_iter = members.begin(); m_iter != members.end(); ++m_iter) {
generate_dart_doc(out, *m_iter);
indent(out) << type_name((*m_iter)->get_type()) + " _"
<< get_member_name((*m_iter)->get_name()) << init_value(*m_iter) << ";" << '\n';
indent(out) << "static const int " << upcase_string((*m_iter)->get_name())
<< " = " << (*m_iter)->get_key() << ";" << '\n';
}
out << '\n';
// Inner Isset class
if (members.size() > 0) {
for (m_iter = members.begin(); m_iter != members.end(); ++m_iter) {
if (!type_can_be_null((*m_iter)->get_type())) {
string field_name = get_member_name((*m_iter)->get_name());
indent(out) << "bool __isset_" << field_name << " = false;" << '\n';
}
}
}
out << '\n';
// Default constructor
indent(out) << tstruct->get_name() << "()";
scope_up(out);
for (m_iter = members.begin(); m_iter != members.end(); ++m_iter) {
t_type* t = get_true_type((*m_iter)->get_type());
if ((*m_iter)->get_value() != nullptr) {
print_const_value(out,
"this." + get_member_name((*m_iter)->get_name()),
t,
(*m_iter)->get_value(),
true,
true);
}
}
scope_down(out);
out << '\n';
generate_dart_bean_boilerplate(out, tstruct);
generate_generic_field_getters(out, tstruct);
generate_generic_field_setters(out, tstruct);
generate_generic_isset_method(out, tstruct);
generate_dart_struct_reader(out, tstruct);
if (is_result) {
generate_dart_struct_result_writer(out, tstruct);
} else {
generate_dart_struct_writer(out, tstruct);
}
generate_dart_struct_tostring(out, tstruct);
generate_dart_validator(out, tstruct);
scope_down(out);
out << '\n';
}
/**
* Generates a function to read all the fields of the struct.
*
* @param tstruct The struct definition
*/
void t_dart_generator::generate_dart_struct_reader(ostream& out, t_struct* tstruct) {
indent(out) << "read(TProtocol iprot)";
scope_up(out);
const vector<t_field*>& fields = tstruct->get_members();
vector<t_field*>::const_iterator f_iter;
// Declare stack tmp variables and read struct header
indent(out) << "TField field;" << '\n';
indent(out) << "iprot.readStructBegin();" << '\n';
// Loop over reading in fields
indent(out) << "while (true)";
scope_up(out);
// Read beginning field marker
indent(out) << "field = iprot.readFieldBegin();" << '\n';
// Check for field STOP marker and break
indent(out) << "if (field.type == TType.STOP)";
scope_up(out);
indent(out) << "break;" << '\n';
scope_down(out);
// Switch statement on the field we are reading
indent(out) << "switch (field.id)";
scope_up(out);
// Generate deserialization code for known cases
for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
indent(out) << "case " << upcase_string((*f_iter)->get_name()) << ":" << '\n';
indent_up();
indent(out) << "if (field.type == " << type_to_enum((*f_iter)->get_type()) << ")";
scope_up(out);
generate_deserialize_field(out, *f_iter, "this.");
generate_isset_set(out, *f_iter);
scope_down(out, " else");
scope_up(out);
indent(out) << "TProtocolUtil.skip(iprot, field.type);" << '\n';
scope_down(out);
indent(out) << "break;" << '\n';
indent_down();
}
// In the default case we skip the field
indent(out) << "default:" << '\n';
indent_up();
indent(out) << "TProtocolUtil.skip(iprot, field.type);" << '\n';
indent(out) << "break;" << '\n';
indent_down();
scope_down(out);
// Read field end marker
indent(out) << "iprot.readFieldEnd();" << '\n';
scope_down(out);
indent(out) << "iprot.readStructEnd();" << '\n' << '\n';
// in non-beans style, check for required fields of primitive type
// (which can be checked here but not in the general validate method)
indent(out) << "// check for required fields of primitive type, which can't be "
"checked in the validate method" << '\n';
for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
if ((*f_iter)->get_req() == t_field::T_REQUIRED && !type_can_be_null((*f_iter)->get_type())) {
string field_name = get_member_name((*f_iter)->get_name());
indent(out) << "if (!__isset_" << field_name << ")";
scope_up(out);
indent(out) << " throw new TProtocolError(TProtocolErrorType.UNKNOWN, \"Required field '"
<< field_name
<< "' was not found in serialized data! Struct: \" + toString());" << '\n';
scope_down(out, "\n\n");
}
}
// performs various checks (e.g. check that all required fields are set)
indent(out) << "validate();" << '\n';
scope_down(out, "\n\n");
}
// generates dart method to perform various checks
// (e.g. check that all required fields are set)
void t_dart_generator::generate_dart_validator(ostream& out, t_struct* tstruct) {
indent(out) << "validate()";
scope_up(out);
const vector<t_field*>& fields = tstruct->get_members();
vector<t_field*>::const_iterator f_iter;
indent(out) << "// check for required fields" << '\n';
for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
if ((*f_iter)->get_req() == t_field::T_REQUIRED) {
string field_name = get_member_name((*f_iter)->get_name());
if (type_can_be_null((*f_iter)->get_type())) {
indent(out) << "if (" << field_name << " == null)";
scope_up(out);
indent(out) << "throw new TProtocolError(TProtocolErrorType.UNKNOWN, \"Required field '"
<< field_name << "' was not present! Struct: \" + toString());"
<< '\n';
scope_down(out);
} else {
indent(out) << "// alas, we cannot check '" << field_name
<< "' because it's a primitive and you chose the non-beans generator." << '\n';
}
}
}
// check that fields of type enum have valid values
indent(out) << "// check that fields of type enum have valid values" << '\n';
for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
t_field* field = (*f_iter);
t_type* type = field->get_type();
// if field is an enum, check that its value is valid
if (type->is_enum()) {
string field_name = get_member_name(field->get_name());
indent(out) << "if (" << generate_isset_check(field) << " && !" << get_ttype_class_name(type)
<< ".VALID_VALUES.contains(" << field_name << "))";
scope_up(out);
indent(out) << "throw new TProtocolError(TProtocolErrorType.UNKNOWN, \"The field '"
<< field_name << "' has been assigned the invalid value "
<< "$" << field_name << "\");" << '\n';
scope_down(out);
}
}
scope_down(out, "\n\n");
}
/**
* Generates a function to write all the fields of the struct
*
* @param tstruct The struct definition
*/
void t_dart_generator::generate_dart_struct_writer(ostream& out, t_struct* tstruct) {
out << indent() << "write(TProtocol oprot)";
scope_up(out);
const vector<t_field*>& fields = tstruct->get_sorted_members();
vector<t_field*>::const_iterator f_iter;
// performs various checks (e.g. check that all required fields are set)
indent(out) << "validate();" << '\n' << '\n';
indent(out) << "oprot.writeStructBegin(_STRUCT_DESC);" << '\n';
for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
string field_name = get_member_name((*f_iter)->get_name());
bool could_be_unset = (*f_iter)->get_req() == t_field::T_OPTIONAL;
if (could_be_unset) {
indent(out) << "if (" << generate_isset_check(*f_iter) << ")";
scope_up(out);
}
bool null_allowed = type_can_be_null((*f_iter)->get_type());
if (null_allowed) {
indent(out) << "if (this." << field_name << " != null)";
scope_up(out);
}
indent(out) << "oprot.writeFieldBegin(_" << constant_name((*f_iter)->get_name())
<< "_FIELD_DESC);" << '\n';
// Write field contents
generate_serialize_field(out, *f_iter, "this.");
// Write field closer
indent(out) << "oprot.writeFieldEnd();" << '\n';
if (null_allowed) {
scope_down(out);
}
if (could_be_unset) {
scope_down(out);
}
}
// Write the struct map
indent(out) << "oprot.writeFieldStop();" << '\n' << indent() << "oprot.writeStructEnd();"
<< '\n';
scope_down(out, "\n\n");
}
/**
* Generates a function to write all the fields of the struct,
* which is a function result. These fields are only written
* if they are set in the Isset array, and only one of them
* can be set at a time.
*
* @param tstruct The struct definition
*/
void t_dart_generator::generate_dart_struct_result_writer(ostream& out, t_struct* tstruct) {
indent(out) << "write(TProtocol oprot)";
scope_up(out);
const vector<t_field*>& fields = tstruct->get_sorted_members();
vector<t_field*>::const_iterator f_iter;
indent(out) << "oprot.writeStructBegin(_STRUCT_DESC);" << '\n' << '\n';
bool first = true;
for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
if (first) {
first = false;
indent(out) << "if ";
} else {
out << " else if ";
}
out << "(this." << generate_isset_check(*f_iter) << ")";
scope_up(out);
indent(out) << "oprot.writeFieldBegin(_" << constant_name((*f_iter)->get_name())
<< "_FIELD_DESC);" << '\n';
// Write field contents
generate_serialize_field(out, *f_iter, "this.");
// Write field closer
indent(out) << "oprot.writeFieldEnd();" << '\n';
scope_down(out, "");
}
out << '\n';
// Write the struct map
indent(out) << "oprot.writeFieldStop();" << '\n' << indent()
<< "oprot.writeStructEnd();" << '\n';
scope_down(out, "\n\n");
}
void t_dart_generator::generate_generic_field_getters(std::ostream& out,
t_struct* tstruct) {
// create the getter
indent(out) << "getFieldValue(int fieldID)";
scope_up(out);
indent(out) << "switch (fieldID)";
scope_up(out);
const vector<t_field*>& fields = tstruct->get_members();
vector<t_field*>::const_iterator f_iter;
for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
t_field* field = *f_iter;
std::string field_name = get_member_name(field->get_name());
indent(out) << "case " << upcase_string(field_name) << ":" << '\n';
indent_up();
indent(out) << "return this." << field_name << ";" << '\n';
indent_down();
}
indent(out) << "default:" << '\n';
indent_up();
indent(out) << "throw new ArgumentError(\"Field $fieldID doesn't exist!\");" << '\n';
indent_down();
scope_down(out); // switch
scope_down(out, "\n\n"); // method
}
void t_dart_generator::generate_generic_field_setters(std::ostream& out,
t_struct* tstruct) {
// create the setter
indent(out) << "setFieldValue(int fieldID, Object value)";
scope_up(out);
indent(out) << "switch (fieldID)";
scope_up(out);
// build up the bodies of both the getter and setter at once
const vector<t_field*>& fields = tstruct->get_members();
vector<t_field*>::const_iterator f_iter;
for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
t_field* field = *f_iter;
std::string field_name = get_member_name(field->get_name());
indent(out) << "case " << upcase_string(field_name) << ":" << '\n';
indent_up();
indent(out) << "if (value == null)";
scope_up(out);
indent(out) << "unset" << get_cap_name(field_name) << "();" << '\n';
scope_down(out, " else");
scope_up(out);
indent(out) << "this." << field_name << " = value;" << '\n';
scope_down(out);
indent(out) << "break;" << '\n';
indent_down();
out << '\n';
}
indent(out) << "default:" << '\n';
indent_up();
indent(out) << "throw new ArgumentError(\"Field $fieldID doesn't exist!\");" << '\n';
indent_down();
scope_down(out); // switch
scope_down(out, "\n\n"); // method
}
// Creates a generic isSet method that takes the field number as argument
void t_dart_generator::generate_generic_isset_method(std::ostream& out, t_struct* tstruct) {
const vector<t_field*>& fields = tstruct->get_members();
vector<t_field*>::const_iterator f_iter;
// create the isSet method
indent(out) << "// Returns true if field corresponding to fieldID is set (has been assigned a "
"value) and false otherwise" << '\n';
indent(out) << "bool isSet(int fieldID)";
scope_up(out);
indent(out) << "switch (fieldID)";
scope_up(out);
for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
t_field* field = *f_iter;
indent(out) << "case " << upcase_string(field->get_name()) << ":" << '\n';
indent_up();
indent(out) << "return " << generate_isset_check(field) << ";" << '\n';
indent_down();
}
indent(out) << "default:" << '\n';
indent_up();
indent(out) << "throw new ArgumentError(\"Field $fieldID doesn't exist!\");" << '\n';
indent_down();
scope_down(out); // switch
scope_down(out, "\n\n"); // method
}
/**
* Generates a set of Dart Bean boilerplate functions (setters, getters, etc.)
* for the given struct.
*
* @param tstruct The struct definition
*/
void t_dart_generator::generate_dart_bean_boilerplate(ostream& out,
t_struct* tstruct) {
const vector<t_field*>& fields = tstruct->get_members();
vector<t_field*>::const_iterator f_iter;
for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
t_field* field = *f_iter;
t_type* type = get_true_type(field->get_type());
std::string field_name = get_member_name(field->get_name());
std::string cap_name = get_cap_name(field_name);
indent(out) << "// " << field_name << '\n';
// Simple getter
generate_dart_doc(out, field);
indent(out) << type_name(type) << " get " << field_name << " => this._" << field_name << ";" << '\n' << '\n';
// Simple setter
generate_dart_doc(out, field);
indent(out) << "set " << field_name << "(" << type_name(type) << " " << field_name << ")";
scope_up(out);
indent(out) << "this._" << field_name << " = " << field_name << ";" << '\n';
generate_isset_set(out, field);
scope_down(out, "\n\n");
// isSet method
indent(out) << "bool is" << get_cap_name("set") << cap_name << "()";
if (type_can_be_null(type)) {
out << " => this." << field_name << " != null;" << '\n' << '\n';
} else {
out << " => this.__isset_" << field_name << ";" << '\n' << '\n';
}
// Unsetter
indent(out) << "unset" << cap_name << "()";
scope_up(out);
if (type_can_be_null(type)) {
indent(out) << "this." << field_name << " = null;" << '\n';
} else {
indent(out) << "this.__isset_" << field_name << " = false;" << '\n';
}
scope_down(out, "\n\n");
}
}
/**
* Generates a toString() method for the given struct
*
* @param tstruct The struct definition
*/
void t_dart_generator::generate_dart_struct_tostring(ostream& out,
t_struct* tstruct) {
indent(out) << "String toString()";
scope_up(out);
indent(out) << "StringBuffer ret = new StringBuffer(\""
<< tstruct->get_name() << "(\");" << '\n' << '\n';
const vector<t_field*>& fields = tstruct->get_members();
vector<t_field*>::const_iterator f_iter;
bool first = true;
for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
bool could_be_unset = (*f_iter)->get_req() == t_field::T_OPTIONAL;
if (could_be_unset) {
indent(out) << "if (" << generate_isset_check(*f_iter) << ")";
scope_up(out);
}
t_field* field = (*f_iter);
std::string field_name = get_member_name(field->get_name());
if (!first) {
indent(out) << "ret.write(\", \");" << '\n';
}
indent(out) << "ret.write(\"" << field_name << ":\");" << '\n';
bool can_be_null = type_can_be_null(field->get_type());
if (can_be_null) {
indent(out) << "if (this." << field_name << " == null)";
scope_up(out);
indent(out) << "ret.write(\"null\");" << '\n';
scope_down(out, " else");
scope_up(out);
}
if (field->get_type()->is_binary()) {
indent(out) << "ret.write(\"BINARY\");" << '\n';
} else if (field->get_type()->is_enum()) {
indent(out) << "String " << field_name << "_name = "
<< get_ttype_class_name(field->get_type())
<< ".VALUES_TO_NAMES[this." << field_name << "];" << '\n';
indent(out) << "if (" << field_name << "_name != null)";
scope_up(out);
indent(out) << "ret.write(" << field_name << "_name);" << '\n';
indent(out) << "ret.write(\" (\");" << '\n';
scope_down(out);
indent(out) << "ret.write(this." << field_name << ");" << '\n';
indent(out) << "if (" << field_name << "_name != null)";
scope_up(out);
indent(out) << "ret.write(\")\");" << '\n';
scope_down(out);
} else {
indent(out) << "ret.write(this." << field_name << ");" << '\n';
}
if (can_be_null) {
scope_down(out);
}
if (could_be_unset) {
scope_down(out);
}
out << '\n';
first = false;
}
indent(out) << "ret.write(\")\");" << '\n' << '\n';
indent(out) << "return ret.toString();" << '\n';
scope_down(out, "\n\n");
}
/**
* Returns a string with the dart representation of the given thrift type
* (e.g. for the type struct it returns "TType.STRUCT")
*/
std::string t_dart_generator::get_dart_type_string(t_type* type) {
if (type->is_list()) {
return "TType.LIST";
} else if (type->is_map()) {
return "TType.MAP";
} else if (type->is_set()) {
return "TType.SET";
} else if (type->is_struct() || type->is_xception()) {
return "TType.STRUCT";
} else if (type->is_enum()) {
return "TType.I32";
} else if (type->is_typedef()) {
return get_dart_type_string(((t_typedef*)type)->get_type());
} else if (type->is_base_type()) {
switch (((t_base_type*)type)->get_base()) {
case t_base_type::TYPE_VOID:
return "TType.VOID";
break;
case t_base_type::TYPE_STRING:
return "TType.STRING";
break;
case t_base_type::TYPE_BOOL:
return "TType.BOOL";
break;
case t_base_type::TYPE_I8:
return "TType.BYTE";
break;
case t_base_type::TYPE_I16:
return "TType.I16";
break;
case t_base_type::TYPE_I32:
return "TType.I32";
break;
case t_base_type::TYPE_I64:
return "TType.I64";
break;
case t_base_type::TYPE_DOUBLE:
return "TType.DOUBLE";
break;
default:
throw std::runtime_error("Unknown thrift type \"" + type->get_name()
+ "\" passed to t_dart_generator::get_dart_type_string!");
break; // This should never happen!
}
} else {
throw std::runtime_error(
"Unknown thrift type \"" + type->get_name()
+ "\" passed to t_dart_generator::get_dart_type_string!"); // This should never happen!
}
}
void t_dart_generator::generate_service(t_service* tservice) {
string file_name = get_file_name(service_name_);
string f_service_name = src_dir_ + "/" + file_name + ".dart";
f_service_.open(f_service_name.c_str());
f_service_ << autogen_comment() << dart_library(file_name) << '\n';
f_service_ << service_imports() << dart_thrift_imports() << '\n';
f_service_ << '\n';
generate_service_interface(tservice);
generate_service_client(tservice);
generate_service_server(tservice);
generate_service_helpers(tservice);
f_service_.close();
}
/**
* Generates a service interface definition.
*
* @param tservice The service to generate a header definition for
*/
void t_dart_generator::generate_service_interface(t_service* tservice) {
string extends_iface = "";
if (tservice->get_extends() != nullptr) {
extends_iface = " extends " + get_ttype_class_name(tservice->get_extends());
}
generate_dart_doc(f_service_, tservice);
string class_name = service_name_;
export_class_to_library(get_file_name(service_name_), class_name);
indent(f_service_) << "abstract class " << class_name << extends_iface;
scope_up(f_service_);
vector<t_function*> functions = tservice->get_functions();
vector<t_function*>::iterator f_iter;
for (f_iter = functions.begin(); f_iter != functions.end(); ++f_iter) {
f_service_ << '\n';
generate_dart_doc(f_service_, *f_iter);
indent(f_service_) << function_signature(*f_iter) << ";" << '\n';
}
scope_down(f_service_, "\n\n");
}
/**
* Generates structs for all the service args and return types
*
* @param tservice The service
*/
void t_dart_generator::generate_service_helpers(t_service* tservice) {
vector<t_function*> functions = tservice->get_functions();
vector<t_function*>::iterator f_iter;
for (f_iter = functions.begin(); f_iter != functions.end(); ++f_iter) {
t_struct* ts = (*f_iter)->get_arglist();
generate_dart_struct_definition(f_service_, ts, false, false);
generate_function_helpers(*f_iter);
}
}
/**
* Generates a service client definition.
*
* @param tservice The service to generate a server for.
*/
void t_dart_generator::generate_service_client(t_service* tservice) {
string extends = "";
string extends_client = "";
if (tservice->get_extends() != nullptr) {
extends = get_ttype_class_name(tservice->get_extends());
extends_client = " extends " + extends + "Client";
}
string class_name = service_name_ + "Client";
export_class_to_library(get_file_name(service_name_), class_name);
indent(f_service_) << "class " << class_name << extends_client
<< " implements " << service_name_;
scope_up(f_service_);
f_service_ << '\n';
indent(f_service_) << class_name << "(TProtocol iprot, [TProtocol oprot = null])";
if (!extends.empty()) {
indent_up();
f_service_ << '\n';
indent(f_service_) << ": super(iprot, oprot);" << '\n';
indent_down();
} else {
scope_up(f_service_);
indent(f_service_) << "_iprot = iprot;" << '\n';
indent(f_service_) << "_oprot = (oprot == null) ? iprot : oprot;" << '\n';
scope_down(f_service_);
}
f_service_ << '\n';
if (extends.empty()) {
indent(f_service_) << "TProtocol _iprot;" << '\n' << '\n';
indent(f_service_) << "TProtocol get iprot => _iprot;" << '\n' << '\n';
indent(f_service_) << "TProtocol _oprot;" << '\n' << '\n';
indent(f_service_) << "TProtocol get oprot => _oprot;" << '\n' << '\n';
indent(f_service_) << "int _seqid = 0;" << '\n' << '\n';
indent(f_service_) << "int get seqid => _seqid;" << '\n' << '\n';
indent(f_service_) << "int nextSeqid() => ++_seqid;" << '\n' << '\n';
}
// Generate client method implementations
vector<t_function*> functions = tservice->get_functions();
vector<t_function*>::const_iterator f_iter;
for (f_iter = functions.begin(); f_iter != functions.end(); ++f_iter) {
// Open function
indent(f_service_) << function_signature(*f_iter) << " async";
scope_up(f_service_);
// Get the struct of function call params
t_struct* arg_struct = (*f_iter)->get_arglist();
string argsname = get_args_class_name((*f_iter)->get_name());
vector<t_field*>::const_iterator fld_iter;
const vector<t_field*>& fields = arg_struct->get_members();
// Serialize the request
indent(f_service_) << "oprot.writeMessageBegin(new TMessage(\"" << (*f_iter)->get_name() << "\", "
<< ((*f_iter)->is_oneway() ? "TMessageType.ONEWAY" : "TMessageType.CALL")
<< ", nextSeqid()));" << '\n';
indent(f_service_) << argsname << " args = new " << argsname << "();" << '\n';
for (fld_iter = fields.begin(); fld_iter != fields.end(); ++fld_iter) {
string arg_field_name = get_member_name((*fld_iter)->get_name());
indent(f_service_) << "args." << arg_field_name << " = "
<< arg_field_name << ";" << '\n';
}
indent(f_service_) << "args.write(oprot);" << '\n';
indent(f_service_) << "oprot.writeMessageEnd();" << '\n' << '\n';
indent(f_service_) << "await oprot.transport.flush();" << '\n' << '\n';
if (!(*f_iter)->is_oneway()) {
indent(f_service_) << "TMessage msg = iprot.readMessageBegin();" << '\n';
indent(f_service_) << "if (msg.type == TMessageType.EXCEPTION)";
scope_up(f_service_);
indent(f_service_) << "TApplicationError error = TApplicationError.read(iprot);" << '\n';
indent(f_service_) << "iprot.readMessageEnd();" << '\n';
indent(f_service_) << "throw error;" << '\n';
scope_down(f_service_, "\n\n");
string result_class = get_result_class_name((*f_iter)->get_name());
indent(f_service_) << result_class << " result = new " << result_class << "();" << '\n';
indent(f_service_) << "result.read(iprot);" << '\n';
indent(f_service_) << "iprot.readMessageEnd();" << '\n';
// Careful, only return _result if not a void function
if (!(*f_iter)->get_returntype()->is_void()) {
indent(f_service_) << "if (result." << generate_isset_check("success") << ")";
scope_up(f_service_);
indent(f_service_) << "return result.success;" << '\n';
scope_down(f_service_, "\n\n");
}
t_struct* xs = (*f_iter)->get_xceptions();
const std::vector<t_field*>& xceptions = xs->get_members();
vector<t_field*>::const_iterator x_iter;
for (x_iter = xceptions.begin(); x_iter != xceptions.end(); ++x_iter) {
string result_field_name = get_member_name((*x_iter)->get_name());
indent(f_service_) << "if (result." << result_field_name << " != null)";
scope_up(f_service_);
indent(f_service_) << "throw result." << result_field_name << ";" << '\n';
scope_down(f_service_);
}
// If you get here it's an exception, unless a void function
if ((*f_iter)->get_returntype()->is_void()) {
indent(f_service_) << "return;" << '\n';
} else {
indent(f_service_) << "throw new TApplicationError(TApplicationErrorType.MISSING_RESULT, \""
<< (*f_iter)->get_name() << " failed: unknown result\");" << '\n';
}
}
scope_down(f_service_, "\n\n");
}
scope_down(f_service_, "\n\n");
}
/**
* Generates a service server definition.
*
* @param tservice The service to generate a server for.
*/
void t_dart_generator::generate_service_server(t_service* tservice) {
// Generate the dispatch methods
vector<t_function*> functions = tservice->get_functions();
vector<t_function*>::iterator f_iter;
// typedef
indent(f_service_) << "typedef void ProcessFunction(int seqid, TProtocol iprot, TProtocol oprot);" << '\n' << '\n';
// Extends stuff
string extends = "";
string extends_processor = "";
if (tservice->get_extends() != nullptr) {
extends = get_ttype_class_name(tservice->get_extends());
extends_processor = " extends " + extends + "Processor";
}
// Generate the header portion
string class_name = service_name_ + "Processor";
export_class_to_library(get_file_name(service_name_), class_name);
indent(f_service_) << "class " << class_name << extends_processor << " implements TProcessor";
scope_up(f_service_);
indent(f_service_) << class_name << "(" << service_name_ << " iface)";
if (!extends.empty()) {
indent_up();
f_service_ << '\n';
indent(f_service_) << ": super(iface)";
indent_down();
}
scope_up(f_service_);
if (extends.empty()) {
indent(f_service_) << "iface_ = iface;" << '\n';
}
for (f_iter = functions.begin(); f_iter != functions.end(); ++f_iter) {
indent(f_service_) << "PROCESS_MAP[\"" << (*f_iter)->get_name()
<< "\"] = " << get_member_name((*f_iter)->get_name()) << ";" << '\n';
}
scope_down(f_service_, "\n\n");
indent(f_service_) << service_name_ << " iface_;" << '\n';
if (extends.empty()) {
indent(f_service_) << "final Map<String, ProcessFunction> PROCESS_MAP = {};" << '\n';
}
f_service_ << '\n';
// Generate the server implementation
indent(f_service_) << "bool process(TProtocol iprot, TProtocol oprot)";
scope_up(f_service_);
indent(f_service_) << "TMessage msg = iprot.readMessageBegin();" << '\n';
indent(f_service_) << "ProcessFunction fn = PROCESS_MAP[msg.name];" << '\n';
indent(f_service_) << "if (fn == null)";
scope_up(f_service_);
indent(f_service_) << "TProtocolUtil.skip(iprot, TType.STRUCT);" << '\n';
indent(f_service_) << "iprot.readMessageEnd();" << '\n';
indent(f_service_) << "TApplicationError x = new TApplicationError(TApplicationErrorType.UNKNOWN_METHOD, "
"\"Invalid method name: '\"+msg.name+\"'\");" << '\n';
indent(f_service_) << "oprot.writeMessageBegin(new TMessage(msg.name, TMessageType.EXCEPTION, msg.seqid));" << '\n';
indent(f_service_) << "x.write(oprot);" << '\n';
indent(f_service_) << "oprot.writeMessageEnd();" << '\n';
indent(f_service_) << "oprot.transport.flush();" << '\n';
indent(f_service_) << "return true;" << '\n';
scope_down(f_service_);
indent(f_service_) << "fn(msg.seqid, iprot, oprot);" << '\n';
indent(f_service_) << "return true;" << '\n';
scope_down(f_service_, "\n\n"); // process function
// Generate the process subfunctions
for (f_iter = functions.begin(); f_iter != functions.end(); ++f_iter) {
generate_process_function(tservice, *f_iter);
}
scope_down(f_service_, "\n\n"); // class
}
/**
* Generates a struct and helpers for a function.
*
* @param tfunction The function
*/
void t_dart_generator::generate_function_helpers(t_function* tfunction) {
if (tfunction->is_oneway()) {
return;
}
t_struct result(program_, get_result_class_name(tfunction->get_name()));
t_field success(tfunction->get_returntype(), "success", 0);
if (!tfunction->get_returntype()->is_void()) {
result.append(&success);
}
t_struct* xs = tfunction->get_xceptions();
const vector<t_field*>& fields = xs->get_members();
vector<t_field*>::const_iterator f_iter;
for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
result.append(*f_iter);
}
generate_dart_struct_definition(f_service_, &result, false, true);
}
/**
* Generates a process function definition.
*
* @param tfunction The function to write a dispatcher for
*/
void t_dart_generator::generate_process_function(t_service* tservice, t_function* tfunction) {
(void)tservice;
bool await_result = (!tfunction->is_oneway() && !tfunction->get_returntype()->is_void());
indent(f_service_) << get_member_name(tfunction->get_name()) << "(int seqid, TProtocol iprot, TProtocol oprot)";
if (await_result) {
f_service_ << " async";
}
scope_up(f_service_);
string argsname = get_args_class_name(tfunction->get_name());
string resultname = get_result_class_name(tfunction->get_name());
indent(f_service_) << argsname << " args = new " << argsname << "();" << '\n';
indent(f_service_) << "args.read(iprot);" << '\n';
indent(f_service_) << "iprot.readMessageEnd();" << '\n';
t_struct* xs = tfunction->get_xceptions();
const std::vector<t_field*>& xceptions = xs->get_members();
vector<t_field*>::const_iterator x_iter;
if (!tfunction->is_oneway()) {
indent(f_service_) << resultname << " result = new " << resultname << "();" << '\n';
}
if (!tfunction->is_oneway() && xceptions.size() > 0) {
indent(f_service_) << "try";
scope_up(f_service_);
}
// Generate the function call
t_struct* arg_struct = tfunction->get_arglist();
const std::vector<t_field*>& fields = arg_struct->get_members();
vector<t_field*>::const_iterator f_iter;
f_service_ << indent();
if (await_result) {
f_service_ << "result.success = await ";
}
f_service_ << "iface_." << get_member_name(tfunction->get_name()) << "(";
bool first = true;
for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
if (first) {
first = false;
} else {
f_service_ << ", ";
}
f_service_ << "args." << get_member_name((*f_iter)->get_name());
}
f_service_ << ");" << '\n';
if (!tfunction->is_oneway() && xceptions.size() > 0) {
for (x_iter = xceptions.begin(); x_iter != xceptions.end(); ++x_iter) {
string result_field_name = get_member_name((*x_iter)->get_name());
scope_down(f_service_, "");
f_service_ << " on " << type_name((*x_iter)->get_type())
<< " catch(" << result_field_name << ")";
scope_up(f_service_);
if (!tfunction->is_oneway()) {
indent(f_service_) << "result." << result_field_name << " = "
<< result_field_name << ";" << '\n';
}
}
scope_down(f_service_, " ");
f_service_ << "catch (th)";
scope_up(f_service_);
indent(f_service_) << "// Internal error" << '\n';
indent(f_service_) << "TApplicationError x = new "
"TApplicationError(TApplicationErrorType.INTERNAL_ERROR, \"Internal error processing "
<< tfunction->get_name() << "\");" << '\n';
indent(f_service_) << "oprot.writeMessageBegin(new TMessage(\"" << tfunction->get_name()
<< "\", TMessageType.EXCEPTION, seqid));" << '\n';
indent(f_service_) << "x.write(oprot);" << '\n';
indent(f_service_) << "oprot.writeMessageEnd();" << '\n';
indent(f_service_) << "oprot.transport.flush();" << '\n';
indent(f_service_) << "return;" << '\n';
scope_down(f_service_);
}
if (tfunction->is_oneway()) {
indent(f_service_) << "return;" << '\n';
} else {
indent(f_service_) << "oprot.writeMessageBegin(new TMessage(\"" << tfunction->get_name()
<< "\", TMessageType.REPLY, seqid));" << '\n';
indent(f_service_) << "result.write(oprot);" << '\n';
indent(f_service_) << "oprot.writeMessageEnd();" << '\n';
indent(f_service_) << "oprot.transport.flush();" << '\n';
}
scope_down(f_service_, "\n\n");
}
/**
* Deserializes a field of any type.
*
* @param tfield The field
* @param prefix The variable name or container for this field
*/
void t_dart_generator::generate_deserialize_field(ostream& out, t_field* tfield, string prefix) {
t_type* type = get_true_type(tfield->get_type());
string field_name = get_member_name(tfield->get_name());
if (type->is_void()) {
throw "CANNOT GENERATE DESERIALIZE CODE FOR void TYPE: " + prefix + field_name;
}
string name = prefix + field_name;
if (type->is_struct() || type->is_xception()) {
generate_deserialize_struct(out, (t_struct*)type, name);
} else if (type->is_container()) {
generate_deserialize_container(out, type, name);
} else if (type->is_base_type() || type->is_enum()) {
indent(out) << name << " = iprot.";
if (type->is_base_type()) {
t_base_type::t_base tbase = ((t_base_type*)type)->get_base();
switch (tbase) {
case t_base_type::TYPE_VOID:
throw "compiler error: cannot serialize void field in a struct: " + name;
break;
case t_base_type::TYPE_STRING:
if (type->is_binary()) {
out << "readBinary();";
} else {
out << "readString();";
}
break;
case t_base_type::TYPE_BOOL:
out << "readBool();";
break;
case t_base_type::TYPE_I8:
out << "readByte();";
break;
case t_base_type::TYPE_I16:
out << "readI16();";
break;
case t_base_type::TYPE_I32:
out << "readI32();";
break;
case t_base_type::TYPE_I64:
out << "readI64();";
break;
case t_base_type::TYPE_DOUBLE:
out << "readDouble();";
break;
default:
throw "compiler error: no Dart name for base type " + t_base_type::t_base_name(tbase);
}
} else if (type->is_enum()) {
out << "readI32();";
}
out << '\n';
} else {
printf("DO NOT KNOW HOW TO DESERIALIZE FIELD '%s' TYPE '%s'\n",
field_name.c_str(),
type_name(type).c_str());
}
}
/**
* Generates an unserializer for a struct, invokes read()
*/
void t_dart_generator::generate_deserialize_struct(ostream& out, t_struct* tstruct, string prefix) {
indent(out) << prefix << " = new " << type_name(tstruct) << "();" << '\n';
indent(out) << prefix << ".read(iprot);" << '\n';
}
/**
* Deserializes a container by reading its size and then iterating
*/
void t_dart_generator::generate_deserialize_container(ostream& out, t_type* ttype, string prefix) {
indent(out);
scope_up(out, "");
string obj;
if (ttype->is_map()) {
obj = tmp("_map");
} else if (ttype->is_set()) {
obj = tmp("_set");
} else if (ttype->is_list()) {
obj = tmp("_list");
}
// Declare variables, read header
if (ttype->is_map()) {
indent(out) << "TMap " << obj << " = iprot.readMapBegin();" << '\n';
} else if (ttype->is_set()) {
indent(out) << "TSet " << obj << " = iprot.readSetBegin();" << '\n';
} else if (ttype->is_list()) {
indent(out) << "TList " << obj << " = iprot.readListBegin();" << '\n';
}
indent(out) << prefix << " = new " << type_name(ttype) << "();" << '\n';
// For loop iterates over elements
string i = tmp("_i");
indent(out) << "for (int " << i << " = 0; " << i << " < " << obj << ".length"
<< "; "
<< "++" << i << ")";
scope_up(out);
if (ttype->is_map()) {
generate_deserialize_map_element(out, (t_map*)ttype, prefix);
} else if (ttype->is_set()) {
generate_deserialize_set_element(out, (t_set*)ttype, prefix);
} else if (ttype->is_list()) {
generate_deserialize_list_element(out, (t_list*)ttype, prefix);
}
scope_down(out);
// Read container end
if (ttype->is_map()) {
indent(out) << "iprot.readMapEnd();" << '\n';
} else if (ttype->is_set()) {
indent(out) << "iprot.readSetEnd();" << '\n';
} else if (ttype->is_list()) {
indent(out) << "iprot.readListEnd();" << '\n';
}
scope_down(out);
}
/**
* Generates code to deserialize a map
*/
void t_dart_generator::generate_deserialize_map_element(ostream& out, t_map* tmap, string prefix) {
string key = tmp("_key");
string val = tmp("_val");
t_field fkey(tmap->get_key_type(), key);
t_field fval(tmap->get_val_type(), val);
indent(out) << declare_field(&fkey) << '\n';
indent(out) << declare_field(&fval) << '\n';
generate_deserialize_field(out, &fkey);
generate_deserialize_field(out, &fval);
indent(out) << prefix << "[" << key << "] = " << val << ";" << '\n';
}
/**
* Deserializes a set element
*/
void t_dart_generator::generate_deserialize_set_element(ostream& out, t_set* tset, string prefix) {
string elem = tmp("_elem");
t_field felem(tset->get_elem_type(), elem);
indent(out) << declare_field(&felem) << '\n';
generate_deserialize_field(out, &felem);
indent(out) << prefix << ".add(" << elem << ");" << '\n';
}
/**
* Deserializes a list element
*/
void t_dart_generator::generate_deserialize_list_element(ostream& out,
t_list* tlist,
string prefix) {
string elem = tmp("_elem");
t_field felem(tlist->get_elem_type(), elem);
indent(out) << declare_field(&felem) << '\n';
generate_deserialize_field(out, &felem);
indent(out) << prefix << ".add(" << elem << ");" << '\n';
}
/**
* Serializes a field of any type.
*
* @param tfield The field to serialize
* @param prefix Name to prepend to field name
*/
void t_dart_generator::generate_serialize_field(ostream& out, t_field* tfield, string prefix) {
t_type* type = get_true_type(tfield->get_type());
string field_name = get_member_name(tfield->get_name());
// Do nothing for void types
if (type->is_void()) {
throw "CANNOT GENERATE SERIALIZE CODE FOR void TYPE: " + prefix + field_name;
}
if (type->is_struct() || type->is_xception()) {
generate_serialize_struct(out, (t_struct*)type, prefix + field_name);
} else if (type->is_container()) {
generate_serialize_container(out, type, prefix + field_name);
} else if (type->is_base_type() || type->is_enum()) {
string name = prefix + field_name;
indent(out) << "oprot.";
if (type->is_base_type()) {
t_base_type::t_base tbase = ((t_base_type*)type)->get_base();
switch (tbase) {
case t_base_type::TYPE_VOID:
throw "compiler error: cannot serialize void field in a struct: " + name;
break;
case t_base_type::TYPE_STRING:
if (type->is_binary()) {
out << "writeBinary(" << name << ");";
} else {
out << "writeString(" << name << ");";
}
break;
case t_base_type::TYPE_BOOL:
out << "writeBool(" << name << ");";
break;
case t_base_type::TYPE_I8:
out << "writeByte(" << name << ");";
break;
case t_base_type::TYPE_I16:
out << "writeI16(" << name << ");";
break;
case t_base_type::TYPE_I32:
out << "writeI32(" << name << ");";
break;
case t_base_type::TYPE_I64:
out << "writeI64(" << name << ");";
break;
case t_base_type::TYPE_DOUBLE:
out << "writeDouble(" << name << ");";
break;
default:
throw "compiler error: no Dart name for base type " + t_base_type::t_base_name(tbase);
}
} else if (type->is_enum()) {
out << "writeI32(" << name << ");";
}
out << '\n';
} else {
printf("DO NOT KNOW HOW TO SERIALIZE FIELD '%s%s' TYPE '%s'\n",
prefix.c_str(),
field_name.c_str(),
type_name(type).c_str());
}
}
/**
* Serializes all the members of a struct.
*
* @param tstruct The struct to serialize
* @param prefix String prefix to attach to all fields
*/
void t_dart_generator::generate_serialize_struct(ostream& out, t_struct* tstruct, string prefix) {
(void)tstruct;
indent(out) << prefix << ".write(oprot);" << '\n';
}
/**
* Serializes a container by writing its size then the elements.
*
* @param ttype The type of container
* @param prefix String prefix for fields
*/
void t_dart_generator::generate_serialize_container(ostream& out, t_type* ttype, string prefix) {
indent(out);
scope_up(out, "");
if (ttype->is_map()) {
string iter = tmp("_key");
indent(out) << "oprot.writeMapBegin(new TMap(" << type_to_enum(((t_map*)ttype)->get_key_type())
<< ", " << type_to_enum(((t_map*)ttype)->get_val_type()) << ", " << prefix << ".length));"
<< '\n';
} else if (ttype->is_set()) {
indent(out) << "oprot.writeSetBegin(new TSet(" << type_to_enum(((t_set*)ttype)->get_elem_type())
<< ", " << prefix << ".length));" << '\n';
} else if (ttype->is_list()) {
indent(out) << "oprot.writeListBegin(new TList("
<< type_to_enum(((t_list*)ttype)->get_elem_type()) << ", " << prefix << ".length));"
<< '\n';
}
string iter = tmp("elem");
if (ttype->is_map()) {
indent(out) << "for (var " << iter << " in " << prefix << ".keys)";
} else if (ttype->is_set() || ttype->is_list()) {
indent(out) << "for (var " << iter << " in " << prefix << ")";
}
scope_up(out);
if (ttype->is_map()) {
generate_serialize_map_element(out, (t_map*)ttype, iter, prefix);
} else if (ttype->is_set()) {
generate_serialize_set_element(out, (t_set*)ttype, iter);
} else if (ttype->is_list()) {
generate_serialize_list_element(out, (t_list*)ttype, iter);
}
scope_down(out);
if (ttype->is_map()) {
indent(out) << "oprot.writeMapEnd();" << '\n';
} else if (ttype->is_set()) {
indent(out) << "oprot.writeSetEnd();" << '\n';
} else if (ttype->is_list()) {
indent(out) << "oprot.writeListEnd();" << '\n';
}
scope_down(out);
}
/**
* Serializes the members of a map.
*/
void t_dart_generator::generate_serialize_map_element(ostream& out,
t_map* tmap,
string iter,
string map) {
t_field kfield(tmap->get_key_type(), iter);
generate_serialize_field(out, &kfield, "");
t_field vfield(tmap->get_val_type(), map + "[" + iter + "]");
generate_serialize_field(out, &vfield, "");
}
/**
* Serializes the members of a set.
*/
void t_dart_generator::generate_serialize_set_element(ostream& out, t_set* tset, string iter) {
t_field efield(tset->get_elem_type(), iter);
generate_serialize_field(out, &efield, "");
}
/**
* Serializes the members of a list.
*/
void t_dart_generator::generate_serialize_list_element(ostream& out, t_list* tlist, string iter) {
t_field efield(tlist->get_elem_type(), iter);
generate_serialize_field(out, &efield, "");
}
/**
* Returns a Dart type name
*
* @param ttype The type
* @return Dart type name, i.e. Map<Key, Value>
*/
string t_dart_generator::type_name(t_type* ttype) {
ttype = get_true_type(ttype);
if (ttype->is_base_type()) {
return base_type_name((t_base_type*)ttype);
} else if (ttype->is_enum()) {
return "int";
} else if (ttype->is_map()) {
t_map* tmap = (t_map*)ttype;
return "Map<" + type_name(tmap->get_key_type()) + ", "
+ type_name(tmap->get_val_type()) + ">";
} else if (ttype->is_set()) {
t_set* tset = (t_set*)ttype;
return "Set<" + type_name(tset->get_elem_type()) + ">";
} else if (ttype->is_list()) {
t_list* tlist = (t_list*)ttype;
return "List<" + type_name(tlist->get_elem_type()) + ">";
}
return get_ttype_class_name(ttype);
}
/**
* Returns the Dart type that corresponds to the thrift type.
*
* @param tbase The base type
*/
string t_dart_generator::base_type_name(t_base_type* type) {
t_base_type::t_base tbase = type->get_base();
switch (tbase) {
case t_base_type::TYPE_VOID:
return "void";
case t_base_type::TYPE_STRING:
if (type->is_binary()) {
return "Uint8List";
} else {
return "String";
}
case t_base_type::TYPE_BOOL:
return "bool";
case t_base_type::TYPE_I8:
case t_base_type::TYPE_I16:
case t_base_type::TYPE_I32:
case t_base_type::TYPE_I64:
return "int";
case t_base_type::TYPE_DOUBLE:
return "double";
default:
throw "compiler error: no Dart name for base type " + t_base_type::t_base_name(tbase);
}
}
/**
* Declares a field, which may include initialization as necessary.
*
* @param ttype The type
*/
string t_dart_generator::declare_field(t_field* tfield, bool init) {
string field_name = get_member_name(tfield->get_name());
string result = type_name(tfield->get_type()) + " " + field_name;
if (init) {
t_type* ttype = get_true_type(tfield->get_type());
if (ttype->is_base_type() && tfield->get_value() != nullptr) {
std:: ofstream dummy;
result += " = " + render_const_value(dummy, field_name, ttype, tfield->get_value());
} else if (ttype->is_base_type()) {
t_base_type::t_base tbase = ((t_base_type*)ttype)->get_base();
switch (tbase) {
case t_base_type::TYPE_VOID:
throw "NO T_VOID CONSTRUCT";
case t_base_type::TYPE_STRING:
result += " = null";
break;
case t_base_type::TYPE_BOOL:
result += " = false";
break;
case t_base_type::TYPE_I8:
case t_base_type::TYPE_I16:
case t_base_type::TYPE_I32:
case t_base_type::TYPE_I64:
result += " = 0";
break;
case t_base_type::TYPE_DOUBLE:
result += " = 0.0";
break;
default:
throw "compiler error: unhandled type";
}
} else if (ttype->is_enum()) {
result += " = 0";
} else if (ttype->is_container()) {
result += " = new " + type_name(ttype) + "()";
} else {
result += " = new " + type_name(ttype) + "()";
;
}
}
return result + ";";
}
/**
* Renders a function signature of the form 'type name(args)'
*
* @param tfunction Function definition
* @return String of rendered function definition
*/
string t_dart_generator::function_signature(t_function* tfunction) {
std::string arguments = argument_list(tfunction->get_arglist());
std::string returntype;
if (tfunction->get_returntype()->is_void()) {
returntype = "Future";
} else {
returntype = "Future<" + type_name(tfunction->get_returntype()) + ">";
}
std::string result = returntype + " " + get_member_name(tfunction->get_name()) +
"(" + arguments + ")";
return result;
}
/**
* Renders a comma separated field list, with type names
*/
string t_dart_generator::argument_list(t_struct* tstruct) {
string result = "";
const vector<t_field*>& fields = tstruct->get_members();
vector<t_field*>::const_iterator f_iter;
bool first = true;
for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
if (first) {
first = false;
} else {
result += ", ";
}
string field_name = get_member_name((*f_iter)->get_name());
result += type_name((*f_iter)->get_type()) + " " + field_name;
}
return result;
}
/**
* Converts the parse type to a C++ enum string for the given type.
*/
string t_dart_generator::type_to_enum(t_type* type) {
type = get_true_type(type);
if (type->is_base_type()) {
t_base_type::t_base tbase = ((t_base_type*)type)->get_base();
switch (tbase) {
case t_base_type::TYPE_VOID:
throw "NO T_VOID CONSTRUCT";
case t_base_type::TYPE_STRING:
return "TType.STRING";
case t_base_type::TYPE_BOOL:
return "TType.BOOL";
case t_base_type::TYPE_I8:
return "TType.BYTE";
case t_base_type::TYPE_I16:
return "TType.I16";
case t_base_type::TYPE_I32:
return "TType.I32";
case t_base_type::TYPE_I64:
return "TType.I64";
case t_base_type::TYPE_DOUBLE:
return "TType.DOUBLE";
default:
break;
}
} else if (type->is_enum()) {
return "TType.I32";
} else if (type->is_struct() || type->is_xception()) {
return "TType.STRUCT";
} else if (type->is_map()) {
return "TType.MAP";
} else if (type->is_set()) {
return "TType.SET";
} else if (type->is_list()) {
return "TType.LIST";
}
throw "INVALID TYPE IN type_to_enum: " + type->get_name();
}
std::string t_dart_generator::init_value(t_field* field) {
// Do not initialize optional fields
if (field->get_req() == t_field::T_OPTIONAL) {
return "";
}
t_type* ttype = field->get_type();
// Get the actual type for a typedef
if (ttype->is_typedef()) {
ttype = ((t_typedef*)ttype)->get_type();
}
// Only consider base types for default initialization
if (!ttype->is_base_type()) {
return "";
}
t_base_type::t_base tbase = ((t_base_type*)ttype)->get_base();
// Initialize bools, ints, and doubles with sane defaults
string result;
switch (tbase) {
case t_base_type::TYPE_BOOL:
result = " = false";
break;
case t_base_type::TYPE_I8:
case t_base_type::TYPE_I16:
case t_base_type::TYPE_I32:
case t_base_type::TYPE_I64:
result = " = 0";
break;
case t_base_type::TYPE_DOUBLE:
result = " = 0.0";
break;
case t_base_type::TYPE_VOID:
case t_base_type::TYPE_STRING:
result = "";
break;
default:
throw "compiler error: unhandled type";
}
return result;
}
std::string t_dart_generator::get_cap_name(std::string name) {
name[0] = toupper(name[0]);
return name;
}
std::string t_dart_generator::get_member_name(std::string name) {
name[0] = tolower(name[0]);
return name;
}
std::string t_dart_generator::get_args_class_name(std::string name) {
return name + "_args";
}
std::string t_dart_generator::get_result_class_name(std::string name) {
return name + "_result";
}
std::string t_dart_generator::get_file_name(std::string name) {
// e.g. change APIForFileIO to api_for_file_io
string ret;
const char* tmp = name.c_str();
bool is_prev_lc = true;
bool is_current_lc = tmp[0] == tolower(tmp[0]);
bool is_next_lc = false;
for (unsigned int i = 0; i < name.length(); i++) {
char lc = tolower(tmp[i]);
if (i == name.length() - 1) {
is_next_lc = false;
} else {
is_next_lc = (tmp[i+1] == tolower(tmp[i+1]));
}
if (i != 0 && !is_current_lc && (is_prev_lc || is_next_lc)) {
ret += "_";
}
ret += lc;
is_prev_lc = is_current_lc;
is_current_lc = is_next_lc;
}
return ret;
}
std::string t_dart_generator::get_constants_class_name(std::string name) {
// e.g. change my_great_model to MyGreatModelConstants
string ret;
const char* tmp = name.c_str();
bool is_prev_underscore = true;
for (unsigned int i = 0; i < name.length(); i++) {
if (tmp[i] == '_') {
is_prev_underscore = true;
} else {
if (is_prev_underscore) {
ret += toupper(tmp[i]);
} else {
ret += tmp[i];
}
is_prev_underscore = false;
}
}
return ret + "Constants";
}
string t_dart_generator::constant_name(string name) {
string constant_name;
bool is_first = true;
bool was_previous_char_upper = false;
for (char character : name) {
bool is_upper = isupper(character);
if (is_upper && !is_first && !was_previous_char_upper) {
constant_name += '_';
}
constant_name += toupper(character);
is_first = false;
was_previous_char_upper = is_upper;
}
return constant_name;
}
/**
* Emits a doc comment if the provided object has a doc in Thrift
*/
void t_dart_generator::generate_dart_doc(ostream& out, t_doc* tdoc) {
if (tdoc->has_doc()) {
generate_docstring_comment(out, "", "/// ", tdoc->get_doc(), "");
}
}
/**
* Emits a doc comment if the provided function object has a doc in Thrift
*/
void t_dart_generator::generate_dart_doc(ostream& out, t_function* tfunction) {
if (tfunction->has_doc()) {
stringstream ss;
ss << tfunction->get_doc();
const vector<t_field*>& fields = tfunction->get_arglist()->get_members();
vector<t_field*>::const_iterator p_iter;
for (p_iter = fields.begin(); p_iter != fields.end(); ++p_iter) {
t_field* p = *p_iter;
string field_name = get_member_name(p->get_name());
ss << "\n@param " << field_name;
if (p->has_doc()) {
ss << " " << p->get_doc();
}
}
generate_docstring_comment(out, "", "/// ", ss.str(), "");
}
}
std::string t_dart_generator::generate_isset_check(t_field* field) {
string field_name = get_member_name(field->get_name());
return generate_isset_check(field_name);
}
std::string t_dart_generator::generate_isset_check(std::string field_name) {
return "is" + get_cap_name("set") + get_cap_name(field_name) + "()";
}
void t_dart_generator::generate_isset_set(ostream& out, t_field* field) {
if (!type_can_be_null(field->get_type())) {
string field_name = get_member_name(field->get_name());
indent(out) << "this.__isset_" << field_name << " = true;" << '\n';
}
}
std::string t_dart_generator::get_ttype_class_name(t_type* ttype) {
if (program_ == ttype->get_program()) {
return ttype->get_name();
} else {
string named_import = "t_" + find_library_name(ttype->get_program());
return named_import + "." + ttype->get_name();
}
}
std::string t_dart_generator::display_name() const {
return "Dart";
}
THRIFT_REGISTER_GENERATOR(
dart,
"Dart",
" library_name: Optional override for library name.\n"
" library_prefix: Generate code that can be used within an existing library.\n"
" Use a dot-separated string, e.g. \"my_parent_lib.src.gen\"\n"
" pubspec_lib: Optional override for thrift lib dependency in pubspec.yaml,\n"
" e.g. \"thrift: 0.x.x\". Use a pipe delimiter to separate lines,\n"
" e.g. \"thrift:| git:| url: git@foo.com\"\n"
)