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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.

 *

 * Contains some contributions under the Thrift Software License.

 * Please see doc/old-thrift-license.txt in the Thrift distribution for

 * details.

 */

#include <string>

#include <fstream>

#include <iostream>

#include <vector>

#include <stdlib.h>

#include <boost/tokenizer.hpp>

#include <sys/stat.h>

#include <sys/types.h>

#include <sstream>

#include "platform.h"

#include "t_oop_generator.h"

using namespace std;

/**

 * Smalltalk code generator.

 *

 */

class t_st_generator : public t_oop_generator {

 public:

  t_st_generator(

      t_program* program,

      const std::map<std::string, std::string>& parsed_options,

      const std::string& option_string)

    : t_oop_generator(program)

  {

    out_dir_base_ = "gen-st";

  }

  /**

   * 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);

  void generate_class_side_definition ();

  void generate_force_consts ();

  std::string render_const_value(t_type* type, t_const_value* value);

  /**

   * Struct generation code

   */

  void generate_st_struct (std::ofstream& out, t_struct* tstruct, bool is_exception);

  void generate_accessors   (std::ofstream& out, t_struct* tstruct);

  /**

   * Service-level generation functions

   */

  void generate_service_client    (t_service* tservice);

  void generate_send_method (t_function* tfunction);

  void generate_recv_method (t_function* tfunction);

  std::string map_reader (t_map *tmap);

  std::string list_reader (t_list *tlist);

  std::string set_reader (t_set *tset);

  std::string struct_reader (t_struct *tstruct, std::string clsName);

  std::string map_writer (t_map *tmap, std::string name);

  std::string list_writer (t_list *tlist, std::string name);

  std::string set_writer (t_set *tset, std::string name);

  std::string struct_writer (t_struct *tstruct, std::string fname);

  std::string write_val (t_type *t, std::string fname);

  std::string read_val (t_type *t);

  /**

   * Helper rendering functions

   */

  std::string st_autogen_comment();

  void st_class_def(std::ofstream &out, std::string name);

  void st_method(std::ofstream &out, std::string cls, std::string name);

  void st_method(std::ofstream &out, std::string cls, std::string name, std::string category);

  void st_close_method(std::ofstream &out);

  void st_class_method(std::ofstream &out, std::string cls, std::string name);

  void st_class_method(std::ofstream &out, std::string cls, std::string name, std::string category);

  void st_setter(std::ofstream &out, std::string cls, std::string name, std::string type);

  void st_getter(std::ofstream &out, std::string cls, std::string name);

  void st_accessors(std::ofstream &out, std::string cls, std::string name, std::string type);

  std::string class_name();

  std::string client_class_name();

  std::string prefix(std::string name);

  std::string declare_field(t_field* tfield);

  std::string sanitize(std::string s);

  std::string type_name(t_type* ttype);

  std::string function_signature(t_function* tfunction);

  std::string argument_list(t_struct* tstruct);

  std::string function_types_comment(t_function* fn);

  std::string type_to_enum(t_type* ttype);

  std::string a_type(t_type* type);

  bool is_vowel(char c);

  std::string temp_name();

  std::string generated_category();

 private:

  /**

   * File streams

   */

  int temporary_var;

  std::ofstream f_;

};

/**

 * Prepares for file generation by opening up the necessary file output

 * streams.

 *

 * @param tprogram The program to generate

 */

void t_st_generator::init_generator() {

  // Make output directory

  MKDIR(get_out_dir().c_str());

  temporary_var = 0;

  // Make output file

  string f_name = get_out_dir()+"/"+program_name_+".st";

  f_.open(f_name.c_str());

  // Print header

  f_ << st_autogen_comment() << endl;

  st_class_def(f_, program_name_);

  generate_class_side_definition();

  //Generate enums

  vector<t_enum*> enums = program_->get_enums();

  vector<t_enum*>::iterator en_iter;

  for (en_iter = enums.begin(); en_iter != enums.end(); ++en_iter) {

    generate_enum(*en_iter);

  }

}

string t_st_generator::class_name() {

  return capitalize(program_name_);

}

string t_st_generator::prefix(string class_name) {

  string prefix = program_->get_namespace("smalltalk.prefix");

  string name = capitalize(class_name);

  name = prefix.empty() ? name : (prefix + name);

  return name;

}

string t_st_generator::client_class_name() {

  return capitalize(service_name_) + "Client";

}

/**

 * Autogen'd comment

 */

string t_st_generator::st_autogen_comment() {

  return

    std::string("'") +

    "Autogenerated by Thrift\n" +

    "\n" +

    "DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING\n" +

    "'!\n";

}

void t_st_generator::generate_force_consts() {

  f_ << prefix(class_name()) << " enums keysAndValuesDo: [:k :v | " <<

    prefix(class_name()) << " enums at: k put: v value].!" << endl;

  f_ << prefix(class_name()) << " constants keysAndValuesDo: [:k :v | " <<

    prefix(class_name()) << " constants at: k put: v value].!" << endl;

}

void t_st_generator::close_generator() {

  generate_force_consts();

  f_.close();

}

string t_st_generator::generated_category() {

  string cat = program_->get_namespace("smalltalk.category");

  // For compatibility with the Thrift grammar, the category must

  // be punctuated by dots.  Replaces them with dashes here.

  for (string::iterator iter = cat.begin(); iter != cat.end(); ++iter) {

    if (*iter == '.') {

      *iter = '-';

    }

  }

  return cat.size() ? cat : "Generated-" + class_name();

}

/**

 * Generates a typedef. This is not done in Smalltalk, types are all implicit.

 *

 * @param ttypedef The type definition

 */

void t_st_generator::generate_typedef(t_typedef* ttypedef) {}

void t_st_generator::st_class_def(std::ofstream &out, string name) {

  out << "Object subclass: #" << prefix(name) << endl;

  indent_up();

  out << indent() << "instanceVariableNames: ''" << endl <<

    indent() << "classVariableNames: ''" << endl <<

    indent() << "poolDictionaries: ''" << endl <<

    indent() << "category: '" << generated_category() << "'!" << endl << endl;

}

void t_st_generator::st_method(std::ofstream &out, string cls, string name) {

  st_method(out, cls, name, "as yet uncategorized");

}

void t_st_generator::st_class_method(std::ofstream &out, string cls, string name) {

  st_method(out, cls + " class", name);

}

void t_st_generator::st_class_method(std::ofstream &out, string cls, string name, string category) {

  st_method(out, cls, name, category);

}

void t_st_generator::st_method(std::ofstream &out, string cls, string name, string category) {

  char timestr[50];

  time_t rawtime;

  struct tm *tinfo;

  time(&rawtime);

  tinfo = localtime(&rawtime);

  strftime(timestr, 50, "%m/%d/%Y %H:%M", tinfo);

  out << "!" << prefix(cls) <<

    " methodsFor: '"+category+"' stamp: 'thrift " << timestr << "'!\n" <<

    name << endl;

  indent_up();

  out << indent();

}

void t_st_generator::st_close_method(std::ofstream &out) {

  out << "! !" << endl << endl;

  indent_down();

}

void t_st_generator::st_setter(std::ofstream &out, string cls, string name, string type = "anObject") {

  st_method(out, cls, name + ": " + type);

  out << name << " := " + type;

  st_close_method(out);

}

void t_st_generator::st_getter(std::ofstream &out, string cls, string name) {

  st_method(out, cls, name + "");

  out << "^ " << name;

  st_close_method(out);

}

void t_st_generator::st_accessors(std::ofstream &out, string cls, string name, string type = "anObject") {

  st_setter(out, cls, name, type);

  st_getter(out, cls, name);

}

void t_st_generator::generate_class_side_definition() {

  f_ << prefix(class_name()) << " class" << endl <<

    "\tinstanceVariableNames: 'constants enums'!" << endl << endl;

  st_accessors(f_, class_name() + " class", "enums");

  st_accessors(f_, class_name() + " class", "constants");

  f_ << prefix(class_name()) << " enums: Dictionary new!" << endl;

  f_ << prefix(class_name()) << " constants: Dictionary new!" << endl;

  f_ << endl;

}

/**

 * Generates code for an enumerated type. Done using a class to scope

 * the values.

 *

 * @param tenum The enumeration

 */

void t_st_generator::generate_enum(t_enum* tenum) {

  string cls_name = program_name_ + capitalize(tenum->get_name());

  f_ << prefix(class_name()) << " enums at: '" << tenum->get_name() << "' put: [" <<

    "(Dictionary new " << endl;

  vector<t_enum_value*> constants = tenum->get_constants();

  vector<t_enum_value*>::iterator c_iter;

  int value = -1;

  for (c_iter = constants.begin(); c_iter != constants.end(); ++c_iter) {

    if ((*c_iter)->has_value()) {

      value = (*c_iter)->get_value();

    } else {

      ++value;

    }

    f_ << "\tat: '" << (*c_iter)->get_name() << "' put: " << value << ";" << endl;

  }

  f_ << "\tyourself)]!" << endl << endl;

}

/**

 * Generate a constant value

 */

void t_st_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_ << prefix(class_name()) << " constants at: '" << name << "' put: [" <<

    render_const_value(type, value) << "]!" << endl << 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_st_generator::render_const_value(t_type* type, t_const_value* value) {

  type = get_true_type(type);

  std::ostringstream out;

  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_BYTE:

    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()) {

    indent(out) << value->get_integer();

  } else if (type->is_struct() || type->is_xception()) {

    out << "(" << capitalize(type->get_name()) << " new " << 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();

      }

      out << indent() << v_iter->first->get_string() << ": " <<

        render_const_value(field_type, v_iter->second) << ";" << endl;

    }

    out << indent() << "yourself)";

    indent_down();

  } else if (type->is_map()) {

    t_type* ktype = ((t_map*)type)->get_key_type();

    t_type* vtype = ((t_map*)type)->get_val_type();

    out << "(Dictionary new" << endl;

    indent_up();

    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) {

      out << indent() << indent();

      out << "at: " << render_const_value(ktype, v_iter->first);

      out << " put: ";

      out << render_const_value(vtype, v_iter->second);

      out << ";" << endl;

    }

    out << indent() << indent() << "yourself)";

    indent_down();

    indent_down();

  } 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();

    }

    if (type->is_set()) {

      out << "(Set new" << endl;

    } else {

      out << "(OrderedCollection new" << endl;

    }

    indent_up();

    indent_up();

    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) {

      out << indent() << indent();

      out << "add: " << render_const_value(etype, *v_iter);

      out << ";" << endl;

    }

    out << indent() << indent() << "yourself)";

    indent_down();

    indent_down();

  } else {

    throw "CANNOT GENERATE CONSTANT FOR TYPE: " + type->get_name();

  }

  return out.str();

}

/**

 * Generates a Smalltalk struct

 */

void t_st_generator::generate_struct(t_struct* tstruct) {

  generate_st_struct(f_, 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_st_generator::generate_xception(t_struct* txception) {

  generate_st_struct(f_, txception, true);

}

/**

 * Generates a smalltalk class to represent a struct

 */

void t_st_generator::generate_st_struct(std::ofstream& out, t_struct* tstruct, bool is_exception = false) {

  const vector<t_field*>& members = tstruct->get_members();

  vector<t_field*>::const_iterator m_iter;

  if (is_exception)

    out << "Error";

  else

    out << "Object";

  out << " subclass: #" << prefix(type_name(tstruct)) << endl <<

    "\tinstanceVariableNames: '";

  if (members.size() > 0) {

    for (m_iter = members.begin(); m_iter != members.end(); ++m_iter) {

      if (m_iter != members.begin()) out << " ";

      out << sanitize((*m_iter)->get_name());

    }

  }

  out << "'\n" <<

    "\tclassVariableNames: ''\n" <<

    "\tpoolDictionaries: ''\n" <<

    "\tcategory: '" << generated_category() << "'!\n\n";

  generate_accessors(out, tstruct);

}

bool t_st_generator::is_vowel(char c) {

  switch(tolower(c)) {

    case 'a': case 'e': case 'i': case 'o': case 'u':

    return true;

  }

  return false;

}

string t_st_generator::a_type(t_type* type) {

  string prefix;

  if (is_vowel(type_name(type)[0]))

    prefix = "an";

  else

    prefix = "a";

  return prefix + capitalize(type_name(type));

}

void t_st_generator::generate_accessors(std::ofstream& out, t_struct* tstruct) {

  const vector<t_field*>& members = tstruct->get_members();

  vector<t_field*>::const_iterator m_iter;

  string type;

  string prefix;

  if (members.size() > 0) {

    for (m_iter = members.begin(); m_iter != members.end(); ++m_iter) {

      st_accessors(out,

                   capitalize(type_name(tstruct)),

                   sanitize((*m_iter)->get_name()),

                   a_type((*m_iter)->get_type()));

    }

    out << endl;

  }

}

/**

 * Generates a thrift service.

 *

 * @param tservice The service definition

 */

void t_st_generator::generate_service(t_service* tservice) {

  generate_service_client(tservice);

  // generate_service_server(tservice);

}

string t_st_generator::temp_name() {

  std::ostringstream out;

  out << "temp" << temporary_var++;

  return out.str();

}

string t_st_generator::map_writer(t_map *tmap, string fname) {

  std::ostringstream out;

  string key = temp_name();

  string val = temp_name();

  out << "[oprot writeMapBegin: (TMap new keyType: " << type_to_enum(tmap->get_key_type()) <<

    "; valueType: " << type_to_enum(tmap->get_val_type()) << "; size: " << fname << " size)." << endl;

  indent_up();

  out << indent() << fname << " keysAndValuesDo: [:" << key << " :" << val << " |" << endl;

  indent_up();

  out << indent() << write_val(tmap->get_key_type(), key) << "." << endl <<

    indent() << write_val(tmap->get_val_type(), val);

  indent_down();

  out << "]." << endl <<

    indent() << "oprot writeMapEnd] value";

  indent_down();

  return out.str();

}

string t_st_generator::map_reader(t_map *tmap) {

  std::ostringstream out;

  string desc = temp_name();

  string val = temp_name();

  out << "[|" << desc << " " << val << "| " << endl;

  indent_up();

  out << indent() << desc << " := iprot readMapBegin." << endl <<

    indent() << val << " := Dictionary new." << endl <<

    indent() << desc << " size timesRepeat: [" << endl;

  indent_up();

  out << indent() << val << " at: " << read_val(tmap->get_key_type()) <<

    " put: " << read_val(tmap->get_val_type());

  indent_down();

  out << "]." << endl <<

    indent() << "iprot readMapEnd." << endl <<

  indent() << val << "] value";

  indent_down();

  return out.str();

}

string t_st_generator::list_writer(t_list *tlist, string fname) {

  std::ostringstream out;

  string val = temp_name();

  out << "[oprot writeListBegin: (TList new elemType: " <<

    type_to_enum(tlist->get_elem_type()) << "; size: " << fname << " size)." << endl;

  indent_up();

  out << indent() << fname << " do: [:" << val << "|" << endl;

  indent_up();

  out << indent() << write_val(tlist->get_elem_type(), val) << endl;

  indent_down();

  out << "]." << endl <<

    indent() << "oprot writeListEnd] value";

  indent_down();

  return out.str();

}

string t_st_generator::list_reader(t_list *tlist) {

  std::ostringstream out;

  string desc = temp_name();

  string val = temp_name();

  out << "[|" << desc << " " << val << "| " << desc << " := iprot readListBegin." << endl;

  indent_up();

  out << indent() << val << " := OrderedCollection new." << endl <<

    indent() << desc << " size timesRepeat: [" << endl;

  indent_up();

  out << indent() << val << " add: " << read_val(tlist->get_elem_type());

  indent_down();

  out << "]." << endl <<

    indent() << "iprot readListEnd." << endl <<

  indent() << val << "] value";

  indent_down();

  return out.str();

}

string t_st_generator::set_writer(t_set *tset, string fname) {

  std::ostringstream out;

  string val = temp_name();

  out << "[oprot writeSetBegin: (TSet new elemType: " << type_to_enum(tset->get_elem_type()) <<

    "; size: " << fname << " size)." << endl;

  indent_up();

  out << indent() << fname << " do: [:" << val << "|" << endl;

  indent_up();

  out << indent() << write_val(tset->get_elem_type(), val) << endl;

  indent_down();

  out << "]." << endl <<

    indent() << "oprot writeSetEnd] value";

  indent_down();

  return out.str();

}

string t_st_generator::set_reader(t_set *tset) {

  std::ostringstream out;

  string desc = temp_name();

  string val = temp_name();

  out << "[|" << desc << " " << val << "| " << desc << " := iprot readSetBegin." << endl;

  indent_up();

  out << indent() << val << " := Set new." << endl <<

    indent() << desc << " size timesRepeat: [" << endl;

  indent_up();

  out << indent() << val << " add: " << read_val(tset->get_elem_type());

  indent_down();

  out << "]." << endl <<

    indent() << "iprot readSetEnd." << endl <<

  indent() << val << "] value";

  indent_down();

  return out.str();

}

string t_st_generator::struct_writer(t_struct *tstruct, string sname) {

  std::ostringstream out;

  const vector<t_field*>& fields = tstruct->get_sorted_members();

  vector<t_field*>::const_iterator fld_iter;

  out << "[oprot writeStructBegin: " <<

    "(TStruct new name: '" + tstruct->get_name() +"')." << endl;

  indent_up();

  for (fld_iter = fields.begin(); fld_iter != fields.end(); ++fld_iter) {

    bool optional = (*fld_iter)->get_req() == t_field::T_OPTIONAL;

    string fname = (*fld_iter)->get_name();

    string accessor = sname + " " + sanitize(fname);

    if (optional) {

      out << indent() << accessor << " ifNotNil: [" << endl;

      indent_up();

    }

    out << indent() << "oprot writeFieldBegin: (TField new name: '" << fname <<

      "'; type: " << type_to_enum((*fld_iter)->get_type()) <<

      "; id: " << (*fld_iter)->get_key() << ")." << endl;

    out << indent() << write_val((*fld_iter)->get_type(), accessor) << "." << endl <<

      indent() << "oprot writeFieldEnd";

    if (optional) {

      out << "]";

      indent_down();

    }

    out << "." << endl;

  }

  out << indent() << "oprot writeFieldStop; writeStructEnd] value";

  indent_down();

  return out.str();

}

string t_st_generator::struct_reader(t_struct *tstruct, string clsName = "") {

  std::ostringstream out;

  const vector<t_field*>& fields = tstruct->get_members();

  vector<t_field*>::const_iterator fld_iter;

  string val = temp_name();

  string desc = temp_name();

  string found = temp_name();

  if (clsName.size() == 0) {

    clsName = tstruct->get_name();

  }

  out << "[|" << desc << " " << val << "|" << endl;

  indent_up();

  //This is nasty, but without it we'll break things by prefixing TResult.

  string name = ((capitalize(clsName) == "TResult") ? capitalize(clsName) : prefix(clsName));

  out << indent() << val << " := " << name << " new." << endl;

  out << indent() << "iprot readStructBegin." << endl <<

    indent() << "[" << desc << " := iprot readFieldBegin." << endl <<

    indent() << desc << " type = TType stop] whileFalse: [|" << found << "|" << endl;

  indent_up();

  for (fld_iter = fields.begin(); fld_iter != fields.end(); ++fld_iter) {

    out << indent() << desc << " id = " << (*fld_iter)->get_key() <<

      " ifTrue: [" << endl;

    indent_up();

    out << indent() << found << " := true." << endl <<

      indent() << val << " " << sanitize((*fld_iter)->get_name()) << ": " <<

      read_val((*fld_iter)->get_type());

    indent_down();

    out << "]." << endl;

  }

  out << indent() << found << " ifNil: [iprot skip: " << desc << " type]]." << endl;

  indent_down();

  out << indent() << "oprot readStructEnd." << endl <<

    indent() << val << "] value";

  indent_down();

  return out.str();

}

string t_st_generator::write_val(t_type *t, string fname) {

  t = get_true_type(t);

  if (t->is_base_type()) {

    t_base_type::t_base tbase = ((t_base_type*) t)->get_base();

    switch(tbase) {

    case t_base_type::TYPE_DOUBLE:

      return "iprot writeDouble: " + fname + " asFloat";

      break;

    case t_base_type::TYPE_BYTE:

    case t_base_type::TYPE_I16:

    case t_base_type::TYPE_I32:

    case t_base_type::TYPE_I64:

      return "iprot write" + capitalize(type_name(t)) + ": " + fname + " asInteger";

    default:

      return "iprot write" + capitalize(type_name(t)) + ": " + fname;

    }

  } else if (t->is_map()) {

    return map_writer((t_map*) t, fname);

  } else if (t->is_struct() || t->is_xception()) {

    return struct_writer((t_struct*) t, fname);

  } else if (t->is_list()) {

    return list_writer((t_list*) t, fname);

  } else if (t->is_set()) {

    return set_writer((t_set*) t, fname);

  } else if (t->is_enum()) {

    return "iprot writeI32: " + fname;

  } else {

    throw "Sorry, I don't know how to write this: " + type_name(t);

  }

}

string t_st_generator::read_val(t_type *t) {

  t = get_true_type(t);

  if (t->is_base_type()) {

    return "iprot read" + capitalize(type_name(t));

  } else if (t->is_map()) {

    return map_reader((t_map*) t);

  } else if (t->is_struct() || t->is_xception()) {

    return struct_reader((t_struct*) t);

  } else if (t->is_list()) {

    return list_reader((t_list*) t);

  } else if (t->is_set()) {

    return set_reader((t_set*) t);

  } else if (t->is_enum()) {

    return "iprot readI32";

  } else {

    throw "Sorry, I don't know how to read this: " + type_name(t);

  }

}

void t_st_generator::generate_send_method(t_function* function) {

  string funname = function->get_name();

  string signature = function_signature(function);

  t_struct* arg_struct = function->get_arglist();

  const vector<t_field*>& fields = arg_struct->get_members();

  vector<t_field*>::const_iterator fld_iter;

  st_method(f_, client_class_name(), "send" + capitalize(signature));

  f_ << "oprot writeMessageBegin:" << endl;

  indent_up();

  f_ << indent() << "(TCallMessage new" << endl;

  indent_up();

  f_ << indent() << "name: '" << funname << "'; " << endl <<

    indent() << "seqid: self nextSeqid)." << endl;

  indent_down();

  indent_down();

  f_ << indent() << "oprot writeStructBegin: " <<

    "(TStruct new name: '" + capitalize(function->get_name()) + "_args')." << endl;

  for (fld_iter = fields.begin(); fld_iter != fields.end(); ++fld_iter) {

    string fname = (*fld_iter)->get_name();

    f_ << indent() << "oprot writeFieldBegin: (TField new name: '" << fname <<

      "'; type: " << type_to_enum((*fld_iter)->get_type()) <<

      "; id: " << (*fld_iter)->get_key() << ")." << endl;

    f_ << indent() << write_val((*fld_iter)->get_type(), fname) << "." << endl <<

      indent() << "oprot writeFieldEnd." << endl;

  }

  f_ << indent() << "oprot writeFieldStop; writeStructEnd; writeMessageEnd." << endl;

  f_ << indent() << "oprot transport flush";

  st_close_method(f_);

}

// We only support receiving TResult structures (so this won't work on the server side)

void t_st_generator::generate_recv_method(t_function* function) {

  string funname = function->get_name();

  string signature = function_signature(function);

  t_struct result(program_, "TResult");

  t_field success(function->get_returntype(), "success", 0);

  result.append(&success);

  t_struct* xs = function->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) {

    // duplicate the field, but call it "exception"... we don't need a dynamic name

    t_field *exception = new t_field((*f_iter)->get_type(), "exception", (*f_iter)->get_key());

    result.append(exception);

  }

  st_method(f_, client_class_name(), "recv" + capitalize(funname));

  f_ << "| f msg res | " << endl <<

    indent() << "msg := oprot readMessageBegin." << endl <<

    indent() << "self validateRemoteMessage: msg." << endl <<

    indent() << "res := " << struct_reader(&result) << "." << endl <<

    indent() << "oprot readMessageEnd." << endl <<

    indent() << "oprot transport flush." << endl <<

    indent() << "res exception ifNotNil: [res exception signal]." << endl <<

    indent() << "^ res";

  st_close_method(f_);

}

string t_st_generator::function_types_comment(t_function* fn) {

  std::ostringstream out;

  const vector<t_field*>& fields = fn->get_arglist()->get_members();

  vector<t_field*>::const_iterator f_iter;

  out << "\"";

  for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {

    out << (*f_iter)->get_name() << ": " << type_name((*f_iter)->get_type());

    if ((f_iter + 1) != fields.end()) {

      out << ", ";

    }

  }

  out << "\"";

  return out.str();

}

/**

 * Generates a service client definition.

 *

 * @param tservice The service to generate a server for.

 */

void t_st_generator::generate_service_client(t_service* tservice) {

  string extends = "";

  string extends_client = "TClient";

  vector<t_function*> functions = tservice->get_functions();

  vector<t_function*>::iterator f_iter;

  if (tservice->get_extends() != NULL) {

    extends = type_name(tservice->get_extends());

    extends_client = extends + "Client";

  }

  f_ << extends_client << " subclass: #" << prefix(client_class_name()) << endl <<

    "\tinstanceVariableNames: ''\n" <<

    "\tclassVariableNames: ''\n" <<

    "\tpoolDictionaries: ''\n" <<

    "\tcategory: '" << generated_category() << "'!\n\n";

  for (f_iter = functions.begin(); f_iter != functions.end(); ++f_iter) {

    string funname = (*f_iter)->get_name();

    string signature = function_signature(*f_iter);

    st_method(f_, client_class_name(), signature);

    f_ << function_types_comment(*f_iter) << endl <<

      indent() << "self send" << capitalize(signature) << "." << endl;

    if (!(*f_iter)->is_oneway()) {

      f_ << indent() << "^ self recv" << capitalize(funname) << " success " << endl;

    }

    st_close_method(f_);

    generate_send_method(*f_iter);

    if (!(*f_iter)->is_oneway()) {

      generate_recv_method(*f_iter);

    }

  }

}

string t_st_generator::sanitize(string s) {

  std::ostringstream out;

  bool underscore = false;

  for (unsigned int i = 0; i < s.size(); i++) {

    if (s[i] == '_') {

      underscore = true;

      continue;

    }

    if (underscore) {

      out << (char) toupper(s[i]);

      underscore = false;

      continue;

    }

    out << s[i];

  }

  return out.str();

}

/**

 * Renders a function signature of the form 'type name(args)'

 *

 * @param tfunction Function definition

 * @return String of rendered function definition

 */

string t_st_generator::function_signature(t_function* tfunction) {

  return tfunction->get_name() + capitalize(argument_list(tfunction->get_arglist()));

}

/**

 * Renders a field list

 */

string t_st_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 += " ";