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t_js_generator.cc
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t_js_generator.cc
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/*
* 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 <map>
#include <string>
#include <fstream>
#include <iostream>
#include <vector>
#include <list>
#include <cassert>
#include <stdlib.h>
#include <sys/stat.h>
#include <sstream>
#include "thrift/platform.h"
#include "thrift/version.h"
using std::map;
using std::ofstream;
using std::ostringstream;
using std::string;
using std::stringstream;
using std::vector;
static const string endl = "\n"; // avoid ostream << std::endl flushes
#include "thrift/generate/t_oop_generator.h"
/**
* JS code generator.
*/
class t_js_generator : public t_oop_generator {
public:
t_js_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;
gen_node_ = false;
gen_jquery_ = false;
gen_ts_ = false;
bool with_ns_ = false;
for( iter = parsed_options.begin(); iter != parsed_options.end(); ++iter) {
if( iter->first.compare("node") == 0) {
gen_node_ = true;
} else if( iter->first.compare("jquery") == 0) {
gen_jquery_ = true;
} else if( iter->first.compare("ts") == 0) {
gen_ts_ = true;
} else if( iter->first.compare("with_ns") == 0) {
with_ns_ = true;
} else {
throw "unknown option js:" + iter->first;
}
}
if (gen_node_ && gen_ts_) {
throw "Invalid switch: [-gen js:node,ts] options not compatible";
}
if (gen_node_ && gen_jquery_) {
throw "Invalid switch: [-gen js:node,jquery] options not compatible, try: [-gen js:node -gen "
"js:jquery]";
}
if (!gen_node_ && with_ns_) {
throw "Invalid switch: [-gen js:with_ns] is only valid when using node.js";
}
if (gen_node_) {
out_dir_base_ = "gen-nodejs";
no_ns_ = !with_ns_;
} else {
out_dir_base_ = "gen-js";
no_ns_ = false;
}
escape_['\''] = "\\'";
}
/**
* Init and close methods
*/
void init_generator();
void close_generator();
/**
* Program-level generation functions
*/
void generate_typedef(t_typedef* ttypedef);
void generate_enum(t_enum* tenum);
void generate_const(t_const* tconst);
void generate_struct(t_struct* tstruct);
void generate_xception(t_struct* txception);
void generate_service(t_service* tservice);
std::string render_recv_throw(std::string var);
std::string render_recv_return(std::string var);
std::string render_const_value(t_type* type, t_const_value* value);
/**
* Structs!
*/
void generate_js_struct(t_struct* tstruct, bool is_exception);
void generate_js_struct_definition(std::ofstream& out,
t_struct* tstruct,
bool is_xception = false,
bool is_exported = true);
void generate_js_struct_reader(std::ofstream& out, t_struct* tstruct);
void generate_js_struct_writer(std::ofstream& out, t_struct* tstruct);
void generate_js_function_helpers(t_function* tfunction);
/**
* Service-level generation functions
*/
void generate_service_helpers(t_service* tservice);
void generate_service_interface(t_service* tservice);
void generate_service_rest(t_service* tservice);
void generate_service_client(t_service* tservice);
void generate_service_processor(t_service* tservice);
void generate_process_function(t_service* tservice, t_function* tfunction);
/**
* Serialization constructs
*/
void generate_deserialize_field(std::ofstream& out,
t_field* tfield,
std::string prefix = "",
bool inclass = false);
void generate_deserialize_struct(std::ofstream& out, t_struct* tstruct, std::string prefix = "");
void generate_deserialize_container(std::ofstream& out, t_type* ttype, std::string prefix = "");
void generate_deserialize_set_element(std::ofstream& out, t_set* tset, std::string prefix = "");
void generate_deserialize_map_element(std::ofstream& out, t_map* tmap, std::string prefix = "");
void generate_deserialize_list_element(std::ofstream& out,
t_list* tlist,
std::string prefix = "");
void generate_serialize_field(std::ofstream& out, t_field* tfield, std::string prefix = "");
void generate_serialize_struct(std::ofstream& out, t_struct* tstruct, std::string prefix = "");
void generate_serialize_container(std::ofstream& out, t_type* ttype, std::string prefix = "");
void generate_serialize_map_element(std::ofstream& out,
t_map* tmap,
std::string kiter,
std::string viter);
void generate_serialize_set_element(std::ofstream& out, t_set* tmap, std::string iter);
void generate_serialize_list_element(std::ofstream& out, t_list* tlist, std::string iter);
/**
* Helper rendering functions
*/
std::string js_includes();
std::string render_includes();
std::string declare_field(t_field* tfield, bool init = false, bool obj = false);
std::string function_signature(t_function* tfunction,
std::string prefix = "",
bool include_callback = false);
std::string argument_list(t_struct* tstruct, bool include_callback = false);
std::string type_to_enum(t_type* ttype);
std::string make_valid_nodeJs_identifier(std::string const& name);
std::string autogen_comment() {
return std::string("//\n") + "// Autogenerated by Thrift Compiler (" + THRIFT_VERSION + ")\n"
+ "//\n" + "// DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING\n"
+ "//\n";
}
t_type* get_contained_type(t_type* t);
std::vector<std::string> js_namespace_pieces(t_program* p) {
std::string ns = p->get_namespace("js");
std::string::size_type loc;
std::vector<std::string> pieces;
if (no_ns_) {
return pieces;
}
if (ns.size() > 0) {
while ((loc = ns.find(".")) != std::string::npos) {
pieces.push_back(ns.substr(0, loc));
ns = ns.substr(loc + 1);
}
}
if (ns.size() > 0) {
pieces.push_back(ns);
}
return pieces;
}
std::string js_type_namespace(t_program* p) {
if (gen_node_) {
if (p != NULL && p != program_) {
return make_valid_nodeJs_identifier(p->get_name()) + "_ttypes.";
}
return "ttypes.";
}
return js_namespace(p);
}
std::string js_export_namespace(t_program* p) {
if (gen_node_) {
return "exports.";
}
return js_namespace(p);
}
bool has_js_namespace(t_program* p) {
if (no_ns_) {
return false;
}
std::string ns = p->get_namespace("js");
return (ns.size() > 0);
}
std::string js_namespace(t_program* p) {
if (no_ns_) {
return "";
}
std::string ns = p->get_namespace("js");
if (ns.size() > 0) {
ns += ".";
}
return ns;
}
/**
* TypeScript Definition File helper functions
*/
string ts_function_signature(t_function* tfunction, bool include_callback);
string ts_get_type(t_type* type);
/**
* Special indentation for TypeScript Definitions because of the module.
* Returns the normal indentation + " " if a module was defined.
* @return string
*/
string ts_indent() { return indent() + (!ts_module_.empty() ? " " : ""); }
/**
* Returns "declare " if no module was defined.
* @return string
*/
string ts_declare() { return (ts_module_.empty() ? "declare " : ""); }
/**
* Returns "?" if the given field is optional.
* @param t_field The field to check
* @return string
*/
string ts_get_req(t_field* field) { return (field->get_req() == t_field::T_OPTIONAL ? "?" : ""); }
/**
* Returns the documentation, if the provided documentable object has one.
* @param t_doc The object to get the documentation from
* @return string The documentation
*/
string ts_print_doc(t_doc* tdoc) {
string result = endl;
if (tdoc->has_doc()) {
std::stringstream doc(tdoc->get_doc());
string item;
result += ts_indent() + "/**" + endl;
while (std::getline(doc, item)) {
result += ts_indent() + " * " + item + endl;
}
result += ts_indent() + " */" + endl;
}
return result;
}
private:
/**
* True if we should generate NodeJS-friendly RPC services.
*/
bool gen_node_;
/**
* True if we should generate services that use jQuery ajax (async/sync).
*/
bool gen_jquery_;
/**
* True if we should generate a TypeScript Definition File for each service.
*/
bool gen_ts_;
/**
* The name of the defined module(s), for TypeScript Definition Files.
*/
string ts_module_;
/**
* True if we should not generate namespace objects for node.
*/
bool no_ns_;
/**
* File streams
*/
std::ofstream f_types_;
std::ofstream f_service_;
std::ofstream f_types_ts_;
std::ofstream f_service_ts_;
};
/**
* Prepares for file generation by opening up the necessary file output
* streams.
*
* @param tprogram The program to generate
*/
void t_js_generator::init_generator() {
// Make output directory
MKDIR(get_out_dir().c_str());
string outdir = get_out_dir();
// Make output file(s)
string f_types_name = outdir + program_->get_name() + "_types.js";
f_types_.open(f_types_name.c_str());
if (gen_ts_) {
string f_types_ts_name = outdir + program_->get_name() + "_types.d.ts";
f_types_ts_.open(f_types_ts_name.c_str());
}
// Print header
f_types_ << autogen_comment();
if (gen_node_ && no_ns_) {
f_types_ << "\"use strict\";" << endl << endl;
}
f_types_ << js_includes() << endl << render_includes() << endl;
if (gen_ts_) {
f_types_ts_ << autogen_comment() << endl;
}
if (gen_node_) {
f_types_ << "var ttypes = module.exports = {};" << endl;
}
string pns;
// setup the namespace
// TODO should the namespace just be in the directory structure for node?
vector<string> ns_pieces = js_namespace_pieces(program_);
if (ns_pieces.size() > 0) {
for (size_t i = 0; i < ns_pieces.size(); ++i) {
pns += ((i == 0) ? "" : ".") + ns_pieces[i];
f_types_ << "if (typeof " << pns << " === 'undefined') {" << endl;
f_types_ << " " << pns << " = {};" << endl;
f_types_ << "}" << endl;
}
if (gen_ts_) {
ts_module_ = pns;
f_types_ts_ << "declare module " << ts_module_ << " {";
}
}
}
/**
* Prints standard js imports
*/
string t_js_generator::js_includes() {
if (gen_node_) {
return string(
"var thrift = require('thrift');\n"
"var Thrift = thrift.Thrift;\n"
"var Q = thrift.Q;\n");
}
return "";
}
/**
* Renders all the imports necessary for including another Thrift program
*/
string t_js_generator::render_includes() {
string result = "";
if (gen_node_) {
const vector<t_program*>& includes = program_->get_includes();
for (size_t i = 0; i < includes.size(); ++i) {
result += "var " + make_valid_nodeJs_identifier(includes[i]->get_name()) + "_ttypes = require('./" + includes[i]->get_name()
+ "_types');\n";
}
if (includes.size() > 0) {
result += "\n";
}
}
return result;
}
/**
* Close up (or down) some filez.
*/
void t_js_generator::close_generator() {
// Close types file(s)
f_types_.close();
if (gen_ts_) {
if (!ts_module_.empty()) {
f_types_ts_ << "}";
}
f_types_ts_.close();
}
}
/**
* Generates a typedef. This is not done in JS, types are all implicit.
*
* @param ttypedef The type definition
*/
void t_js_generator::generate_typedef(t_typedef* ttypedef) {
(void)ttypedef;
}
/**
* Generates code for an enumerated type. Since define is expensive to lookup
* in JS, we use a global array for this.
*
* @param tenum The enumeration
*/
void t_js_generator::generate_enum(t_enum* tenum) {
f_types_ << js_type_namespace(tenum->get_program()) << tenum->get_name() << " = {" << endl;
if (gen_ts_) {
f_types_ts_ << ts_print_doc(tenum) << ts_indent() << ts_declare() << "enum "
<< tenum->get_name() << " {" << endl;
}
indent_up();
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();
if (gen_ts_) {
f_types_ts_ << ts_indent() << (*c_iter)->get_name() << " = " << value << "," << endl;
// add 'value: key' in addition to 'key: value' for TypeScript enums
f_types_ << indent() << "'" << value << "' : '" << (*c_iter)->get_name() << "'," << endl;
}
f_types_ << indent() << "'" << (*c_iter)->get_name() << "' : " << value;
if (c_iter != constants.end() - 1) {
f_types_ << ",";
}
f_types_ << endl;
}
indent_down();
f_types_ << "};" << endl;
if (gen_ts_) {
f_types_ts_ << ts_indent() << "}" << endl;
}
}
/**
* Generate a constant value
*/
void t_js_generator::generate_const(t_const* tconst) {
t_type* type = tconst->get_type();
string name = tconst->get_name();
t_const_value* value = tconst->get_value();
f_types_ << js_type_namespace(program_) << name << " = ";
f_types_ << render_const_value(type, value) << ";" << endl;
if (gen_ts_) {
f_types_ts_ << ts_print_doc(tconst) << ts_indent() << ts_declare() << "var " << name << ": "
<< ts_get_type(type) << ";" << endl;
}
}
/**
* Prints the value of a constant with the given type. Note that type checking
* is NOT performed in this function as it is always run beforehand using the
* validate_types method in main.cc
*/
string t_js_generator::render_const_value(t_type* type, t_const_value* value) {
std::ostringstream out;
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_STRING:
out << "'" << get_escaped_string(value) << "'";
break;
case t_base_type::TYPE_BOOL:
out << (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:
out << value->get_integer();
break;
case t_base_type::TYPE_DOUBLE:
if (value->get_type() == t_const_value::CV_INTEGER) {
out << value->get_integer();
} else {
out << 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()) {
out << value->get_integer();
} else if (type->is_struct() || type->is_xception()) {
out << "new " << js_type_namespace(type->get_program()) << type->get_name() << "({" << endl;
indent_up();
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*>& val = value->get_map();
map<t_const_value*, t_const_value*>::const_iterator v_iter;
for (v_iter = val.begin(); v_iter != val.end(); ++v_iter) {
t_type* field_type = NULL;
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 == NULL) {
throw "type error: " + type->get_name() + " has no field " + v_iter->first->get_string();
}
if (v_iter != val.begin())
out << ",";
out << render_const_value(g_type_string, v_iter->first);
out << " : ";
out << render_const_value(field_type, v_iter->second);
}
out << "})";
} else if (type->is_map()) {
t_type* ktype = ((t_map*)type)->get_key_type();
t_type* vtype = ((t_map*)type)->get_val_type();
out << "{" << endl;
indent_up();
const map<t_const_value*, t_const_value*>& val = value->get_map();
map<t_const_value*, t_const_value*>::const_iterator v_iter;
for (v_iter = val.begin(); v_iter != val.end(); ++v_iter) {
if (v_iter != val.begin())
out << "," << endl;
out << indent() << render_const_value(ktype, v_iter->first);
out << " : ";
out << render_const_value(vtype, v_iter->second);
}
indent_down();
out << endl << "}";
} else if (type->is_list() || type->is_set()) {
t_type* etype;
if (type->is_list()) {
etype = ((t_list*)type)->get_elem_type();
} else {
etype = ((t_set*)type)->get_elem_type();
}
out << "[";
const vector<t_const_value*>& val = value->get_list();
vector<t_const_value*>::const_iterator v_iter;
for (v_iter = val.begin(); v_iter != val.end(); ++v_iter) {
if (v_iter != val.begin())
out << ",";
out << render_const_value(etype, *v_iter);
}
out << "]";
}
return out.str();
}
/**
* Make a struct
*/
void t_js_generator::generate_struct(t_struct* tstruct) {
generate_js_struct(tstruct, false);
}
/**
* Generates a struct definition for a thrift exception. Basically the same
* as a struct but extends the Exception class.
*
* @param txception The struct definition
*/
void t_js_generator::generate_xception(t_struct* txception) {
generate_js_struct(txception, true);
}
/**
* Structs can be normal or exceptions.
*/
void t_js_generator::generate_js_struct(t_struct* tstruct, bool is_exception) {
generate_js_struct_definition(f_types_, tstruct, is_exception);
}
/**
* Return type of contained elements for a container type. For maps
* this is type of value (keys are always strings in js)
*/
t_type* t_js_generator::get_contained_type(t_type* t) {
t_type* etype;
if (t->is_list()) {
etype = ((t_list*)t)->get_elem_type();
} else if (t->is_set()) {
etype = ((t_set*)t)->get_elem_type();
} else {
etype = ((t_map*)t)->get_val_type();
}
return etype;
}
/**
* Generates a struct definition for a thrift data type. This is nothing in JS
* where the objects are all just associative arrays (unless of course we
* decide to start using objects for them...)
*
* @param tstruct The struct definition
*/
void t_js_generator::generate_js_struct_definition(ofstream& out,
t_struct* tstruct,
bool is_exception,
bool is_exported) {
const vector<t_field*>& members = tstruct->get_members();
vector<t_field*>::const_iterator m_iter;
if (gen_node_) {
string prefix = has_js_namespace(tstruct->get_program()) ? js_namespace(tstruct->get_program()) : "var ";
if (is_exported) {
out << prefix << tstruct->get_name() << " = "
<< "module.exports." << tstruct->get_name() << " = function(args) {" << endl;
} else {
out << prefix << tstruct->get_name() << " = function(args) {"
<< endl;
}
} else {
out << js_namespace(tstruct->get_program()) << tstruct->get_name() << " = function(args) {"
<< endl;
if (gen_ts_) {
f_types_ts_ << ts_print_doc(tstruct) << ts_indent() << ts_declare() << "class "
<< tstruct->get_name() << (is_exception ? " extends Thrift.TException" : "")
<< " {" << endl;
}
}
indent_up();
if (gen_node_ && is_exception) {
out << indent() << "Thrift.TException.call(this, \"" << js_namespace(tstruct->get_program())
<< tstruct->get_name() << "\");" << endl;
out << indent() << "this.name = \"" << js_namespace(tstruct->get_program())
<< tstruct->get_name() << "\";" << endl;
}
// members with arguments
for (m_iter = members.begin(); m_iter != members.end(); ++m_iter) {
string dval = declare_field(*m_iter, false, true);
t_type* t = get_true_type((*m_iter)->get_type());
if ((*m_iter)->get_value() != NULL && !(t->is_struct() || t->is_xception())) {
dval = render_const_value((*m_iter)->get_type(), (*m_iter)->get_value());
out << indent() << "this." << (*m_iter)->get_name() << " = " << dval << ";" << endl;
} else {
out << indent() << dval << ";" << endl;
}
if (gen_ts_) {
f_types_ts_ << ts_indent() << (*m_iter)->get_name() << ": "
<< ts_get_type((*m_iter)->get_type()) << ";" << endl;
}
}
// Generate constructor from array
if (members.size() > 0) {
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() != NULL && (t->is_struct() || t->is_xception())) {
indent(out) << "this." << (*m_iter)->get_name() << " = "
<< render_const_value(t, (*m_iter)->get_value()) << ";" << endl;
}
}
// Early returns for exceptions
for (m_iter = members.begin(); m_iter != members.end(); ++m_iter) {
t_type* t = get_true_type((*m_iter)->get_type());
if (t->is_xception()) {
out << indent() << "if (args instanceof " << js_type_namespace(t->get_program())
<< t->get_name() << ") {" << endl << indent() << indent() << "this."
<< (*m_iter)->get_name() << " = args;" << endl << indent() << indent() << "return;"
<< endl << indent() << "}" << endl;
}
}
out << indent() << "if (args) {" << endl;
if (gen_ts_) {
f_types_ts_ << endl << ts_indent() << "constructor(args?: { ";
}
for (m_iter = members.begin(); m_iter != members.end(); ++m_iter) {
t_type* t = get_true_type((*m_iter)->get_type());
out << indent() << indent() << "if (args." << (*m_iter)->get_name() << " !== undefined && args." << (*m_iter)->get_name() << " !== null) {"
<< endl << indent() << indent() << indent() << "this." << (*m_iter)->get_name();
if (t->is_struct()) {
out << (" = new " + js_type_namespace(t->get_program()) + t->get_name() +
"(args."+(*m_iter)->get_name() +");");
out << endl;
} else if (t->is_container()) {
t_type* etype = get_contained_type(t);
string copyFunc = t->is_map() ? "Thrift.copyMap" : "Thrift.copyList";
string type_list = "";
while (etype->is_container()) {
if (type_list.length() > 0) {
type_list += ", ";
}
type_list += etype->is_map() ? "Thrift.copyMap" : "Thrift.copyList";
etype = get_contained_type(etype);
}
if (etype->is_struct()) {
if (type_list.length() > 0) {
type_list += ", ";
}
type_list += js_type_namespace(etype->get_program()) + etype->get_name();
}
else {
if (type_list.length() > 0) {
type_list += ", ";
}
type_list += "null";
}
out << (" = " + copyFunc + "(args." + (*m_iter)->get_name() +
", [" + type_list + "]);");
out << endl;
} else {
out << " = args." << (*m_iter)->get_name() << ";" << endl;
}
if (!(*m_iter)->get_req()) {
out << indent() << indent() << "} else {" << endl << indent() << indent() << indent()
<< "throw new Thrift.TProtocolException(Thrift.TProtocolExceptionType.UNKNOWN, "
"'Required field " << (*m_iter)->get_name() << " is unset!');" << endl;
}
out << indent() << indent() << "}" << endl;
if (gen_ts_) {
f_types_ts_ << (*m_iter)->get_name() << ts_get_req(*m_iter) << ": "
<< ts_get_type((*m_iter)->get_type()) << "; ";
}
}
out << indent() << "}" << endl;
if (gen_ts_) {
f_types_ts_ << "});" << endl;
}
}
indent_down();
out << "};" << endl;
if (gen_ts_) {
f_types_ts_ << ts_indent() << "}" << endl;
}
if (is_exception) {
out << "Thrift.inherits(" << js_namespace(tstruct->get_program()) << tstruct->get_name()
<< ", Thrift.TException);" << endl;
out << js_namespace(tstruct->get_program()) << tstruct->get_name() << ".prototype.name = '"
<< tstruct->get_name() << "';" << endl;
} else {
// init prototype
out << js_namespace(tstruct->get_program()) << tstruct->get_name() << ".prototype = {};"
<< endl;
}
generate_js_struct_reader(out, tstruct);
generate_js_struct_writer(out, tstruct);
}
/**
* Generates the read() method for a struct
*/
void t_js_generator::generate_js_struct_reader(ofstream& out, t_struct* tstruct) {
const vector<t_field*>& fields = tstruct->get_members();
vector<t_field*>::const_iterator f_iter;
out << js_namespace(tstruct->get_program()) << tstruct->get_name()
<< ".prototype.read = function(input) {" << endl;
indent_up();
indent(out) << "input.readStructBegin();" << endl;
// Loop over reading in fields
indent(out) << "while (true)" << endl;
scope_up(out);
indent(out) << "var ret = input.readFieldBegin();" << endl;
indent(out) << "var fname = ret.fname;" << endl;
indent(out) << "var ftype = ret.ftype;" << endl;
indent(out) << "var fid = ret.fid;" << endl;
// Check for field STOP marker and break
indent(out) << "if (ftype == Thrift.Type.STOP) {" << endl;
indent_up();
indent(out) << "break;" << endl;
indent_down();
indent(out) << "}" << endl;
if (!fields.empty()) {
// Switch statement on the field we are reading
indent(out) << "switch (fid)" << endl;
scope_up(out);
// Generate deserialization code for known cases
for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
indent(out) << "case " << (*f_iter)->get_key() << ":" << endl;
indent(out) << "if (ftype == " << type_to_enum((*f_iter)->get_type()) << ") {" << endl;
indent_up();
generate_deserialize_field(out, *f_iter, "this.");
indent_down();
indent(out) << "} else {" << endl;
indent(out) << " input.skip(ftype);" << endl;
out << indent() << "}" << endl << indent() << "break;" << endl;
}
if (fields.size() == 1) {
// pseudo case to make jslint happy
indent(out) << "case 0:" << endl;
indent(out) << " input.skip(ftype);" << endl;
indent(out) << " break;" << endl;
}
// In the default case we skip the field
indent(out) << "default:" << endl;
indent(out) << " input.skip(ftype);" << endl;
scope_down(out);
} else {
indent(out) << "input.skip(ftype);" << endl;
}
indent(out) << "input.readFieldEnd();" << endl;
scope_down(out);
indent(out) << "input.readStructEnd();" << endl;
indent(out) << "return;" << endl;
indent_down();
out << indent() << "};" << endl << endl;
}
/**
* Generates the write() method for a struct
*/
void t_js_generator::generate_js_struct_writer(ofstream& out, t_struct* tstruct) {
string name = tstruct->get_name();
const vector<t_field*>& fields = tstruct->get_members();
vector<t_field*>::const_iterator f_iter;
out << js_namespace(tstruct->get_program()) << tstruct->get_name()
<< ".prototype.write = function(output) {" << endl;
indent_up();
indent(out) << "output.writeStructBegin('" << name << "');" << endl;
for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
out << indent() << "if (this." << (*f_iter)->get_name() << " !== null && this."
<< (*f_iter)->get_name() << " !== undefined) {" << endl;
indent_up();
indent(out) << "output.writeFieldBegin("
<< "'" << (*f_iter)->get_name() << "', " << type_to_enum((*f_iter)->get_type())
<< ", " << (*f_iter)->get_key() << ");" << endl;
// Write field contents
generate_serialize_field(out, *f_iter, "this.");
indent(out) << "output.writeFieldEnd();" << endl;
indent_down();
indent(out) << "}" << endl;
}
out << indent() << "output.writeFieldStop();" << endl << indent() << "output.writeStructEnd();"
<< endl;
out << indent() << "return;" << endl;
indent_down();
out << indent() << "};" << endl << endl;
}
/**
* Generates a thrift service.
*
* @param tservice The service definition
*/
void t_js_generator::generate_service(t_service* tservice) {
string f_service_name = get_out_dir() + service_name_ + ".js";
f_service_.open(f_service_name.c_str());
if (gen_ts_) {
string f_service_ts_name = get_out_dir() + service_name_ + ".d.ts";
f_service_ts_.open(f_service_ts_name.c_str());
}
f_service_ << autogen_comment();
if (gen_node_ && no_ns_) {
f_service_ << "\"use strict\";" << endl << endl;
}
f_service_ << js_includes() << endl << render_includes() << endl;
if (gen_ts_) {
if (tservice->get_extends() != NULL) {
f_service_ts_ << "/// <reference path=\"" << tservice->get_extends()->get_name()
<< ".d.ts\" />" << endl;
}
f_service_ts_ << autogen_comment() << endl;
if (!ts_module_.empty()) {
f_service_ts_ << "declare module " << ts_module_ << " {";
}
}
if (gen_node_) {
if (tservice->get_extends() != NULL) {
f_service_ << "var " << tservice->get_extends()->get_name() << " = require('./"
<< tservice->get_extends()->get_name() << "');" << endl << "var "
<< tservice->get_extends()->get_name()
<< "Client = " << tservice->get_extends()->get_name() << ".Client;" << endl
<< "var " << tservice->get_extends()->get_name()
<< "Processor = " << tservice->get_extends()->get_name() << ".Processor;" << endl;
}
f_service_ << "var ttypes = require('./" + program_->get_name() + "_types');" << endl;
}
generate_service_helpers(tservice);
generate_service_interface(tservice);