/*
 * 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.
 */

#ifndef T_FIELD_H
#define T_FIELD_H

#include <string>
#include <boost/lexical_cast.hpp>

#include "t_doc.h"

// Forward declare for xsd_attrs
class t_struct;

/**
 * Class to represent a field in a thrift structure. A field has a data type,
 * a symbolic name, and a numeric identifier.
 *
 */
class t_field : public t_doc {
 public:
  t_field(t_type* type, std::string name) :
    type_(type),
    name_(name),
    key_(0),
    value_(NULL),
    xsd_optional_(false),
    xsd_nillable_(false),
    xsd_attrs_(NULL) {}

  t_field(t_type* type, std::string name, int32_t key) :
    type_(type),
    name_(name),
    key_(key),
    req_(T_OPT_IN_REQ_OUT),
    value_(NULL),
    xsd_optional_(false),
    xsd_nillable_(false),
    xsd_attrs_(NULL) {}

  ~t_field() {}

  t_type* get_type() const {
    return type_;
  }

  const std::string& get_name() const {
    return name_;
  }

  int32_t get_key() const {
    return key_;
  }

  enum e_req {
    T_REQUIRED,
    T_OPTIONAL,
    T_OPT_IN_REQ_OUT,
  };

  void set_req(e_req req) {
    req_ = req;
  }

  e_req get_req() const {
    return req_;
  }

  void set_value(t_const_value* value) {
    value_ = value;
  }

  t_const_value* get_value() {
    return value_;
  }

  void set_xsd_optional(bool xsd_optional) {
    xsd_optional_ = xsd_optional;
  }

  bool get_xsd_optional() const {
    return xsd_optional_;
  }

  void set_xsd_nillable(bool xsd_nillable) {
    xsd_nillable_ = xsd_nillable;
  }

  bool get_xsd_nillable() const {
    return xsd_nillable_;
  }

  void set_xsd_attrs(t_struct* xsd_attrs) {
    xsd_attrs_ = xsd_attrs;
  }

  t_struct* get_xsd_attrs() {
    return xsd_attrs_;
  }

  // This is not the same function as t_type::get_fingerprint_material,
  // but it does the same thing.
  std::string get_fingerprint_material() const {
    return boost::lexical_cast<std::string>(key_) + ":" +
      ((req_ == T_OPTIONAL) ? "opt-" : "") +
      type_->get_fingerprint_material();
  }

  /**
   * Comparator to sort fields in ascending order by key.
   * Make this a functor instead of a function to help GCC inline it.
   * The arguments are (const) references to const pointers to const t_fields.
   */
  struct key_compare {
    bool operator()(t_field const * const & a, t_field const * const & b) {
      return a->get_key() < b->get_key();
    }
  };


 private:
  t_type* type_;
  std::string name_;
  int32_t key_;
  e_req req_;
  t_const_value* value_;

  bool xsd_optional_;
  bool xsd_nillable_;
  t_struct* xsd_attrs_;

};

#endif