/*
  Copyright (C) 2019-2024  Sutou Kouhei <kou@clear-code.com>

  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.

  This library is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
*/

#include "grn_cast.h"
#include "grn_float.h"
#include "grn_geo.h"
#include "grn_pat.h"
#include "grn_str.h"

#include <groonga/bulk.hpp>

#if defined(GRN_WITH_RAPIDJSON) || defined(GRN_WITH_SIMDJSON)
#  include "grn_db.h"
#  include <groonga/smart_obj.hpp>

#  include <limits>
#  include <string>
#  include <vector>
#endif

#ifdef GRN_WITH_SIMDJSON
#  include <simdjson.h>
#elif defined(GRN_WITH_RAPIDJSON)
#  define RAPIDJSON_NAMESPACE grn_rapidjson
#  include <rapidjson/document.h>
#  include <rapidjson/memorystream.h>
#endif

#if defined(GRN_WITH_RAPIDJSON) || defined(GRN_WITH_SIMDJSON)
namespace {
  grn_rc
  json_to_weight_uvector_add(grn_ctx *ctx,
                             grn_caster *caster,
                             grn_obj *table,
                             const char *key,
                             size_t size,
                             float weight)
  {
    uint32_t missing_mode = (caster->flags & GRN_OBJ_MISSING_MASK);
    grn_id id = GRN_ID_NIL;
    grn::TextBulk key_bulk(ctx, GRN_OBJ_DO_SHALLOW_COPY);
    GRN_TEXT_SET(ctx, *key_bulk, key, size);
    grn_table_add_options options;
    memset(&options, 0, sizeof(grn_table_add_options));
    options.ignore_empty_normalized_key = true;
    if (size == 0) {
      options.ignored = true;
    } else {
      if (missing_mode == GRN_OBJ_MISSING_ADD) {
        id = grn_table_add_by_key(ctx, table, *key_bulk, &options);
      } else {
        id = grn_table_get_by_key(ctx, table, *key_bulk);
      }
    }
    if (id == GRN_ID_NIL && !options.ignored) {
      uint32_t invalid_mode = (caster->flags & GRN_OBJ_INVALID_MASK);
      if (invalid_mode != GRN_OBJ_INVALID_ERROR) {
        ERRCLR(ctx);
      }
      grn_caster element_caster = {
        *key_bulk,
        caster->dest,
        caster->flags,
        caster->target,
      };
      CAST_FAILED(&element_caster);
      if (ctx->rc == GRN_SUCCESS) {
        if (missing_mode != GRN_OBJ_MISSING_NIL) {
          return GRN_SUCCESS;
        }
      } else {
        ERRCLR(ctx);
        return GRN_SUCCESS;
      }
    }
    return grn_uvector_add_element_record(ctx, caster->dest, id, weight);
  }

  class Array {
  public:
    Array(grn_ctx *ctx) : ctx_(ctx), values_() {}

    ~Array()
    {
      for (auto value : values_) {
        grn_obj_close(ctx_, value);
      }
    }

    bool
    add_bool_value(const bool value)
    {
      auto bulk = grn_obj_open(ctx_, GRN_BULK, 0, GRN_DB_BOOL);
      GRN_BOOL_SET(ctx_, bulk, value);
      values_.push_back(bulk);
      return true;
    }

    bool
    add_int32_value(const int32_t value)
    {
      auto bulk = grn_obj_open(ctx_, GRN_BULK, 0, GRN_DB_INT32);
      GRN_INT32_SET(ctx_, bulk, value);
      values_.push_back(bulk);
      return true;
    }

    bool
    add_uint32_value(const uint32_t value)
    {
      auto bulk = grn_obj_open(ctx_, GRN_BULK, 0, GRN_DB_UINT32);
      GRN_UINT32_SET(ctx_, bulk, value);
      values_.push_back(bulk);
      return true;
    }

    bool
    add_int64_value(const int64_t value)
    {
      auto bulk = grn_obj_open(ctx_, GRN_BULK, 0, GRN_DB_INT64);
      GRN_INT64_SET(ctx_, bulk, value);
      values_.push_back(bulk);
      return true;
    }

    bool
    add_uint64_value(const uint64_t value)
    {
      auto bulk = grn_obj_open(ctx_, GRN_BULK, 0, GRN_DB_UINT64);
      GRN_UINT64_SET(ctx_, bulk, value);
      values_.push_back(bulk);
      return true;
    }

    bool
    add_double_value(const double value)
    {
      auto bulk = grn_obj_open(ctx_, GRN_BULK, 0, GRN_DB_FLOAT);
      GRN_FLOAT_SET(ctx_, bulk, value);
      values_.push_back(bulk);
      return true;
    }

    bool
    add_string_value(std::string_view value)
    {
      auto bulk = grn_obj_open(ctx_, GRN_BULK, 0, GRN_DB_TEXT);
      GRN_TEXT_SET(ctx_, bulk, value.data(), value.size());
      values_.push_back(bulk);
      return true;
    }

    bool
    add_record_value(grn_id domain, grn_id id)
    {
      auto bulk = grn_obj_open(ctx_, GRN_BULK, 0, domain);
      GRN_RECORD_SET(ctx_, bulk, id);
      values_.push_back(bulk);
      return true;
    }

    const std::vector<grn_obj *> &
    values() const
    {
      return values_;
    }

  private:
    grn_ctx *ctx_;
    std::vector<grn_obj *> values_;
  };

  class Record {
  public:
    Record(grn_ctx *ctx, grn_obj *table)
      : ctx_(ctx),
        table_(table),
        _id_index_(std::numeric_limits<size_t>::max()),
        _key_index_(std::numeric_limits<size_t>::max()),
        _id_(GRN_ID_NIL),
        keys_(),
        values_()
    {
    }

    ~Record()
    {
      for (auto value : values_) {
        grn_obj_close(ctx_, value);
      }
    }

    bool
    add_to_table(grn_caster *caster, grn_id *added_id)
    {
      uint32_t missing_mode = (caster->flags & GRN_OBJ_MISSING_MASK);
      if (have__id()) {
        if (_id_ == GRN_ID_NIL) {
          *added_id = GRN_ID_NIL;
        } else {
          if (grn_table_at(ctx_, table_, _id_) == _id_) {
            *added_id = _id_;
          } else {
            *added_id = GRN_ID_NIL;
          }
        }
      } else if (have__key()) {
        auto _key = get_value(_key_index_);
        if (missing_mode == GRN_OBJ_MISSING_ADD) {
          *added_id = grn_table_add_by_key(ctx_, table_, _key, nullptr);
        } else {
          *added_id = grn_table_get_by_key(ctx_, table_, _key);
        }
      } else {
        if (grn_obj_is_table_with_key(ctx_, table_)) {
          return false;
        }
        if (missing_mode == GRN_OBJ_MISSING_ADD) {
          *added_id = grn_table_add(ctx_, table_, nullptr, 0, nullptr);
        }
      }
      if (*added_id == GRN_ID_NIL) {
        if ((caster->flags & GRN_OBJ_INVALID_MASK) == GRN_OBJ_INVALID_ERROR) {
          return false;
        }
        if (missing_mode == GRN_OBJ_MISSING_IGNORE) {
          return true;
        }
      }
      for (size_t i = 0; i < keys_.size(); ++i) {
        if (have__id() && i == _id_index_) {
          continue;
        }
        if (have__key() && i == _key_index_) {
          continue;
        }
        const auto &column_name = keys_[i];
        auto column =
          grn_obj_column(ctx_, table_, column_name.data(), column_name.size());
        if (!column) {
          return false;
        }
        grn::SharedObj shared_column(ctx_, column);
        const auto &value = values_[i];
        grn_obj_set_value(ctx_, column, *added_id, value, GRN_OBJ_SET);
        if (ctx_->rc != GRN_SUCCESS) {
          return false;
        }
      }
      return true;
    }

    bool
    add_key(std::string_view key)
    {
      if (key == GRN_COLUMN_NAME_ID) {
        if (_id_index_ != std::numeric_limits<size_t>::max()) {
          return false;
        }
        if (_key_index_ != std::numeric_limits<size_t>::max()) {
          return false;
        }
        _id_index_ = keys_.size();
      } else if (key == GRN_COLUMN_NAME_KEY) {
        if (_id_index_ != std::numeric_limits<size_t>::max()) {
          return false;
        }
        if (_key_index_ != std::numeric_limits<size_t>::max()) {
          return false;
        }
        _key_index_ = keys_.size();
      }
      keys_.push_back(std::string(key));
      return true;
    }

    bool
    add_bool_value(const bool value)
    {
      if (_id_index_ == keys_.size() - 1) {
        return false;
      }
      auto bulk = grn_obj_open(ctx_, GRN_BULK, 0, GRN_DB_BOOL);
      GRN_BOOL_SET(ctx_, bulk, value);
      values_.push_back(bulk);
      return true;
    }

    bool
    add_int32_value(const int32_t value)
    {
      if (_id_index_ == keys_.size() - 1) {
        if (value == 0) {
          return false;
        }
        _id_ = value;
      }
      auto bulk = grn_obj_open(ctx_, GRN_BULK, 0, GRN_DB_INT32);
      GRN_INT32_SET(ctx_, bulk, value);
      values_.push_back(bulk);
      return true;
    }

    bool
    add_uint32_value(const uint32_t value)
    {
      if (_id_index_ == keys_.size() - 1) {
        if (value == 0) {
          return false;
        }
        _id_ = value;
      }
      auto bulk = grn_obj_open(ctx_, GRN_BULK, 0, GRN_DB_UINT32);
      GRN_UINT32_SET(ctx_, bulk, value);
      values_.push_back(bulk);
      return true;
    }

    bool
    add_int64_value(const int64_t value)
    {
      if (_id_index_ == keys_.size() - 1) {
        if (value == 0) {
          return false;
        }
        _id_ = value;
      }
      auto bulk = grn_obj_open(ctx_, GRN_BULK, 0, GRN_DB_INT64);
      GRN_INT64_SET(ctx_, bulk, value);
      values_.push_back(bulk);
      return true;
    }

    bool
    add_uint64_value(const uint64_t value)
    {
      if (_id_index_ == keys_.size() - 1) {
        if (value == 0) {
          return false;
        }
        _id_ = value;
      }
      auto bulk = grn_obj_open(ctx_, GRN_BULK, 0, GRN_DB_UINT64);
      GRN_UINT64_SET(ctx_, bulk, value);
      values_.push_back(bulk);
      return true;
    }

    bool
    add_double_value(const double value)
    {
      if (_id_index_ == keys_.size() - 1) {
        return false;
      }
      auto bulk = grn_obj_open(ctx_, GRN_BULK, 0, GRN_DB_FLOAT);
      GRN_FLOAT_SET(ctx_, bulk, value);
      values_.push_back(bulk);
      return true;
    }

    bool
    add_string_value(std::string_view value)
    {
      if (_id_index_ == keys_.size() - 1) {
        return false;
      }
      auto bulk = grn_obj_open(ctx_, GRN_BULK, 0, GRN_DB_TEXT);
      GRN_TEXT_SET(ctx_, bulk, value.data(), value.size());
      values_.push_back(bulk);
      return true;
    }

    bool
    add_record_value(grn_id domain, grn_id id)
    {
      if (_id_index_ == keys_.size() - 1) {
        return false;
      }
      auto bulk = grn_obj_open(ctx_, GRN_BULK, 0, domain);
      GRN_RECORD_SET(ctx_, bulk, id);
      values_.push_back(bulk);
      return true;
    }

    bool
    add_array_value(const Array *array)
    {
      if (_id_index_ == keys_.size() - 1) {
        return false;
      }
      auto vector = grn_obj_open(ctx_, GRN_VECTOR, 0, GRN_ID_NIL);
      values_.push_back(vector);
      for (auto value : array->values()) {
        grn_vector_add_element(ctx_,
                               vector,
                               GRN_BULK_HEAD(value),
                               GRN_BULK_VSIZE(value),
                               0,
                               value->header.domain);
      }
      return true;
    }

    grn_obj *
    table() const
    {
      return table_;
    }

    grn_id
    id() const
    {
      return _id_;
    }

    bool
    have__id() const
    {
      return _id_index_ != std::numeric_limits<size_t>::max();
    }

    size_t
    _id_index() const
    {
      return _id_index_;
    }

    bool
    have__key() const
    {
      return _key_index_ != std::numeric_limits<size_t>::max();
    }

    size_t
    _key_index() const
    {
      return _key_index_;
    }

    const std::string &
    get_key(size_t i) const
    {
      return keys_[i];
    }

    grn_obj *
    get_value(size_t i)
    {
      return values_[i];
    }

  private:
    grn_ctx *ctx_;
    grn_obj *table_;
    size_t _id_index_;
    size_t _key_index_;
    grn_id _id_;
    std::vector<std::string> keys_;
    std::vector<grn_obj *> values_;
  };

#  ifdef GRN_WITH_RAPIDJSON
  struct Int8Handler : public RAPIDJSON_NAMESPACE::BaseReaderHandler<> {
    grn_ctx *ctx_;
    grn_caster *caster_;

    Int8Handler(grn_ctx *ctx, grn_caster *caster) : ctx_(ctx), caster_(caster)
    {
    }

    bool
    Default()
    {
      return false;
    }

    bool
    Int(int value)
    {
      GRN_INT8_PUT(ctx_, caster_->dest, value);
      return true;
    }

    bool
    Uint(unsigned int value)
    {
      return Int(value);
    }

    bool
    Int64(int64_t value)
    {
      return Int(value);
    }

    bool
    Uint64(uint64_t value)
    {
      return Int(value);
    }
  };

  struct UInt8Handler : public RAPIDJSON_NAMESPACE::BaseReaderHandler<> {
    grn_ctx *ctx_;
    grn_caster *caster_;

    UInt8Handler(grn_ctx *ctx, grn_caster *caster) : ctx_(ctx), caster_(caster)
    {
    }

    bool
    Default()
    {
      return false;
    }

    bool
    Int(int value)
    {
      return Uint(value);
    }

    bool
    Uint(unsigned int value)
    {
      GRN_UINT8_PUT(ctx_, caster_->dest, value);
      return true;
    }

    bool
    Int64(int64_t value)
    {
      return Uint(value);
    }

    bool
    Uint64(uint64_t value)
    {
      return Uint(value);
    }
  };

  struct Int16Handler : public RAPIDJSON_NAMESPACE::BaseReaderHandler<> {
    grn_ctx *ctx_;
    grn_caster *caster_;

    Int16Handler(grn_ctx *ctx, grn_caster *caster) : ctx_(ctx), caster_(caster)
    {
    }

    bool
    Default()
    {
      return false;
    }

    bool
    Int(int value)
    {
      GRN_INT16_PUT(ctx_, caster_->dest, value);
      return true;
    }

    bool
    Uint(unsigned int value)
    {
      return Int(value);
    }

    bool
    Int64(int64_t value)
    {
      return Int(value);
    }

    bool
    Uint64(uint64_t value)
    {
      return Int(value);
    }
  };

  struct UInt16Handler : public RAPIDJSON_NAMESPACE::BaseReaderHandler<> {
    grn_ctx *ctx_;
    grn_caster *caster_;

    UInt16Handler(grn_ctx *ctx, grn_caster *caster) : ctx_(ctx), caster_(caster)
    {
    }

    bool
    Default()
    {
      return false;
    }

    bool
    Int(int value)
    {
      return Uint(value);
    }

    bool
    Uint(unsigned int value)
    {
      GRN_UINT16_PUT(ctx_, caster_->dest, value);
      return true;
    }

    bool
    Int64(int64_t value)
    {
      return Uint(value);
    }

    bool
    Uint64(uint64_t value)
    {
      return Uint(value);
    }
  };

  struct Int32Handler : public RAPIDJSON_NAMESPACE::BaseReaderHandler<> {
    grn_ctx *ctx_;
    grn_caster *caster_;

    Int32Handler(grn_ctx *ctx, grn_caster *caster) : ctx_(ctx), caster_(caster)
    {
    }

    bool
    Default()
    {
      return false;
    }

    bool
    Int(int value)
    {
      GRN_INT32_PUT(ctx_, caster_->dest, value);
      return true;
    }

    bool
    Uint(unsigned int value)
    {
      return Int(value);
    }

    bool
    Int64(int64_t value)
    {
      return Int(value);
    }

    bool
    Uint64(uint64_t value)
    {
      return Int(value);
    }
  };

  struct UInt32Handler : public RAPIDJSON_NAMESPACE::BaseReaderHandler<> {
    grn_ctx *ctx_;
    grn_caster *caster_;

    UInt32Handler(grn_ctx *ctx, grn_caster *caster) : ctx_(ctx), caster_(caster)
    {
    }

    bool
    Default()
    {
      return false;
    }

    bool
    Int(int value)
    {
      return Uint(value);
    }

    bool
    Uint(unsigned int value)
    {
      GRN_UINT32_PUT(ctx_, caster_->dest, value);
      return true;
    }

    bool
    Int64(int64_t value)
    {
      return Uint(value);
    }

    bool
    Uint64(uint64_t value)
    {
      return Uint(value);
    }
  };

  struct Int64Handler : public RAPIDJSON_NAMESPACE::BaseReaderHandler<> {
    grn_ctx *ctx_;
    grn_caster *caster_;

    Int64Handler(grn_ctx *ctx, grn_caster *caster) : ctx_(ctx), caster_(caster)
    {
    }

    bool
    Default()
    {
      return false;
    }

    bool
    Int(int value)
    {
      return Int64(value);
    }

    bool
    Uint(unsigned int value)
    {
      return Int64(value);
    }

    bool
    Int64(int64_t value)
    {
      GRN_INT64_PUT(ctx_, caster_->dest, value);
      return true;
    }

    bool
    Uint64(uint64_t value)
    {
      return Int64(value);
    }
  };

  struct UInt64Handler : public RAPIDJSON_NAMESPACE::BaseReaderHandler<> {
    grn_ctx *ctx_;
    grn_caster *caster_;

    UInt64Handler(grn_ctx *ctx, grn_caster *caster) : ctx_(ctx), caster_(caster)
    {
    }

    bool
    Default()
    {
      return false;
    }

    bool
    Int(int value)
    {
      return Uint64(value);
    }

    bool
    Uint(unsigned int value)
    {
      return Uint64(value);
    }

    bool
    Int64(int64_t value)
    {
      return Uint64(value);
    }

    bool
    Uint64(uint64_t value)
    {
      GRN_UINT64_PUT(ctx_, caster_->dest, value);
      return true;
    }
  };

  struct FloatHandler : public RAPIDJSON_NAMESPACE::BaseReaderHandler<> {
    grn_ctx *ctx_;
    grn_caster *caster_;

    FloatHandler(grn_ctx *ctx, grn_caster *caster) : ctx_(ctx), caster_(caster)
    {
    }

    bool
    Default()
    {
      return false;
    }

    bool
    Int(int value)
    {
      return Double(value);
    }

    bool
    Uint(unsigned int value)
    {
      return Double(value);
    }

    bool
    Int64(int64_t value)
    {
      return Double(value);
    }

    bool
    Uint64(uint64_t value)
    {
      return Double(value);
    }

    bool
    Double(double value)
    {
      GRN_FLOAT_PUT(ctx_, caster_->dest, value);
      return true;
    }
  };

  struct Float32Handler : public RAPIDJSON_NAMESPACE::BaseReaderHandler<> {
    grn_ctx *ctx_;
    grn_caster *caster_;

    Float32Handler(grn_ctx *ctx, grn_caster *caster)
      : ctx_(ctx),
        caster_(caster)
    {
    }

    bool
    Default()
    {
      return false;
    }

    bool
    Int(int value)
    {
      return Double(value);
    }

    bool
    Uint(unsigned int value)
    {
      return Double(value);
    }

    bool
    Int64(int64_t value)
    {
      return Double(value);
    }

    bool
    Uint64(uint64_t value)
    {
      return Double(value);
    }

    bool
    Double(double value)
    {
      GRN_FLOAT32_PUT(ctx_, caster_->dest, value);
      return true;
    }
  };

  struct TableWeightHandler : public RAPIDJSON_NAMESPACE::BaseReaderHandler<> {
    TableWeightHandler(grn_ctx *ctx, grn_caster *caster)
      : ctx_(ctx),
        caster_(caster),
        table_(grn_ctx_at(ctx, caster->dest->header.domain)),
        weight_(0.0)
    {
    }

    ~TableWeightHandler() { grn_obj_unref(ctx_, table_); }

    bool
    Default()
    {
      return false;
    }

    bool
    String(const char *data, size_t size, bool copy)
    {
      auto rc =
        json_to_weight_uvector_add(ctx_, caster_, table_, data, size, weight_);
      return rc == GRN_SUCCESS;
    }

    bool
    Int(int value)
    {
      weight_ = value;
      return true;
    }

    bool
    Uint(unsigned int value)
    {
      weight_ = value;
      return true;
    }

    bool
    Double(double value)
    {
      weight_ = value;
      return true;
    }

  private:
    grn_ctx *ctx_;
    grn_caster *caster_;
    grn_obj *table_;
    float weight_;
  };

  class TableHandler : public RAPIDJSON_NAMESPACE::BaseReaderHandler<> {
  public:
    TableHandler(grn_ctx *ctx, grn_caster *caster)
      : ctx_(ctx),
        caster_(caster),
        table_stack_(),
        record_stack_(),
        array_stack_(),
        container_type_stack_()
    {
      table_stack_.push_back(grn_ctx_at(ctx, caster_->dest->header.domain));
    }

    ~TableHandler()
    {
      for (auto table : table_stack_) {
        grn_obj_unref(ctx_, table);
      }
    }

    bool
    Default()
    {
      return false;
    }

    bool
    StartObject()
    {
      // Top level must be array.
      if (container_type_stack_.size() == 0) {
        return false;
      }
      // TODO: Nested object isn't supported yet.
      // Resolve the current key as a column name and find the target table.
      if (container_type_stack_.size() == 2) {
        return false;
      }
      container_type_stack_.push_back(ContainerType::OBJECT);
      const auto table = table_stack_.back();
      record_stack_.emplace_back(ctx_, table);
      return true;
    }

    bool
    Key(const char *data, size_t size, bool copy)
    {
      auto record = &(record_stack_.back());
      return record->add_key(std::string_view(data, size));
    }

    bool
    EndObject(size_t n)
    {
      auto record = &(record_stack_.back());
      auto table = record->table();
      grn_id domain = DB_OBJ(table)->id;
      grn_id id = GRN_ID_NIL;
      if (!record->add_to_table(caster_, &id)) {
        return false;
      }
      record_stack_.pop_back();
      container_type_stack_.pop_back();
      if (id == GRN_ID_NIL) {
        return true;
      }
      bool success = add_value(
        [&](Record *record) {
          record->add_record_value(domain, id);
          return true;
        },
        [&](Array *array) {
          array->add_record_value(domain, id);
          return true;
        });
      return success;
    }

    bool
    StartArray()
    {
      container_type_stack_.push_back(ContainerType::ARRAY);
      array_stack_.emplace_back(ctx_);
      return true;
    }

    bool
    EndArray(size_t n)
    {
      auto array = &(array_stack_.back());
      container_type_stack_.pop_back();
      if (container_type_stack_.empty()) {
        uint32_t missing_mode = (caster_->flags & GRN_OBJ_MISSING_MASK);
        for (auto value : array->values()) {
          grn_id id = GRN_ID_NIL;
          if (value->header.domain == caster_->dest->header.domain) {
            id = GRN_RECORD_VALUE(value);
          } else {
            grn_obj casted_value;
            GRN_RECORD_INIT(&casted_value,
                            GRN_BULK,
                            caster_->dest->header.domain);
            grn_caster value_caster = {
              value,
              &casted_value,
              caster_->flags,
              caster_->target,
            };
            auto rc = grn_caster_cast(ctx_, &value_caster);
            if (rc == GRN_SUCCESS && GRN_BULK_VSIZE(&casted_value) > 0) {
              id = GRN_RECORD_VALUE(&casted_value);
            }
            GRN_OBJ_FIN(ctx_, &casted_value);
          }
          if (id == GRN_ID_NIL) {
            if (ctx_->rc == GRN_SUCCESS) {
              if (missing_mode != GRN_OBJ_MISSING_NIL) {
                continue;
              }
            } else {
              ERRCLR(ctx_);
              continue;
            }
          }
          auto rc = grn_uvector_add_element_record(ctx_, caster_->dest, id, 0);
          if (rc != GRN_SUCCESS) {
            return false;
          }
        }
        return true;
      } else {
        const auto container_type = container_type_stack_.back();
        switch (container_type) {
        case ContainerType::OBJECT:
          {
            auto record = &(record_stack_.back());
            record->add_array_value(array);
            return true;
          }
        case ContainerType::ARRAY:
          // Nested array isn't supported.
          return false;
        default:
          return false;
        }
      }
      array_stack_.pop_back();
      return true;
    }

    bool
    Bool(bool value)
    {
      return add_value(
        [&](Record *record) {
          record->add_bool_value(value);
          return true;
        },
        [&](Array *array) {
          array->add_bool_value(value);
          return true;
        });
    }

    bool
    Int(int value)
    {
      return add_value(
        [&](Record *record) {
          record->add_int32_value(value);
          return true;
        },
        [&](Array *array) {
          array->add_int32_value(value);
          return true;
        });
    }

    bool
    Uint(unsigned int value)
    {
      return add_value(
        [&](Record *record) {
          record->add_uint32_value(value);
          return true;
        },
        [&](Array *array) {
          array->add_uint32_value(value);
          return true;
        });
    }

    bool
    Int64(int value)
    {
      return add_value(
        [&](Record *record) {
          record->add_int64_value(value);
          return true;
        },
        [&](Array *array) {
          array->add_int64_value(value);
          return true;
        });
    }

    bool
    Uint64(unsigned int value)
    {
      return add_value(
        [&](Record *record) {
          record->add_uint64_value(value);
          return true;
        },
        [&](Array *array) {
          array->add_uint64_value(value);
          return true;
        });
    }

    bool
    Double(double value)
    {
      return add_value(
        [&](Record *record) {
          record->add_double_value(value);
          return true;
        },
        [&](Array *array) {
          array->add_double_value(value);
          return true;
        });
    }

    bool
    String(const char *data, size_t size, bool copy)
    {
      return add_value(
        [&](Record *record) {
          record->add_string_value(std::string_view(data, size));
          return true;
        },
        [&](Array *array) {
          array->add_string_value(std::string_view(data, size));
          return true;
        });
    }

  private:
    template <typename ObjectAddValue, typename ArrayAddValue>
    bool
    add_value(ObjectAddValue object_add_value, ArrayAddValue array_add_value)
    {
      const auto container_type = container_type_stack_.back();
      switch (container_type) {
      case ContainerType::OBJECT:
        {
          auto record = &(record_stack_.back());
          return object_add_value(record);
        }
      case ContainerType::ARRAY:
        {
          auto array = &(array_stack_.back());
          return array_add_value(array);
        }
      default:
        return false;
      }
    }

    enum class ContainerType {
      OBJECT,
      ARRAY,
    };

    grn_ctx *ctx_;
    grn_caster *caster_;
    std::vector<grn_obj *> table_stack_;
    std::vector<Record> record_stack_;
    std::vector<Array> array_stack_;
    std::vector<ContainerType> container_type_stack_;
  };

  struct TextHandler : public RAPIDJSON_NAMESPACE::BaseReaderHandler<> {
    grn_ctx *ctx_;
    grn_caster *caster_;

    TextHandler(grn_ctx *ctx, grn_caster *caster) : ctx_(ctx), caster_(caster)
    {
    }

    bool
    Default()
    {
      return false;
    }

    bool
    String(const char *data, size_t size, bool copy)
    {
      grn_vector_add_element_float(ctx_,
                                   caster_->dest,
                                   data,
                                   size,
                                   0.0,
                                   GRN_DB_SHORT_TEXT);
      return true;
    }
  };
#  endif

  bool
  json_maybe_container(const char *json, size_t length)
  {
    const char *start = json;
    const char *end = json + length;
    for (; start < end; start++) {
      bool is_whitespace = false;
      switch (start[0]) {
      case ' ':
      case '\n':
      case '\r':
      case '\t':
        is_whitespace = true;
        break;
      default:
        break;
      }
      if (!is_whitespace) {
        break;
      }
    }
    if (start >= end) {
      return false;
    }
    switch (start[0]) {
    case '[':
    case '{':
      return true;
    default:
      return false;
    }
  }

#  ifdef GRN_WITH_SIMDJSON
  template <typename Document>
  grn_rc
  cast_text_to_uvector_simdjson_int64(grn_ctx *ctx,
                                      grn_caster *caster,
                                      Document &document)
  {
    simdjson::ondemand::array array;
    auto error = document.get_array().get(array);
    if (error != simdjson::SUCCESS) {
      return GRN_INVALID_ARGUMENT;
    }
    for (auto value : array) {
      int64_t int64_value;
      auto error = value.get_int64().get(int64_value);
      if (error != simdjson::SUCCESS) {
        return GRN_INVALID_ARGUMENT;
      }
      auto rc = grn::bulk::put(ctx, caster->dest, int64_value);
      if (rc != GRN_SUCCESS) {
        return rc;
      }
    }
    return GRN_SUCCESS;
  }

  template <typename Document>
  grn_rc
  cast_text_to_uvector_simdjson_uint64(grn_ctx *ctx,
                                       grn_caster *caster,
                                       Document &document)
  {
    simdjson::ondemand::array array;
    if (document.get_array().get(array) != simdjson::SUCCESS) {
      return GRN_INVALID_ARGUMENT;
    }
    for (auto value : array) {
      uint64_t uint64_value;
      if (value.get_uint64().get(uint64_value) != simdjson::SUCCESS) {
        return GRN_INVALID_ARGUMENT;
      }
      auto rc = grn::bulk::put(ctx, caster->dest, uint64_value);
      if (rc != GRN_SUCCESS) {
        return rc;
      }
    }
    return GRN_SUCCESS;
  }

  template <typename Document>
  grn_rc
  cast_text_to_uvector_simdjson_double(grn_ctx *ctx,
                                       grn_caster *caster,
                                       Document &document)
  {
    simdjson::ondemand::array array;
    if (document.get_array().get(array) != simdjson::SUCCESS) {
      return GRN_INVALID_ARGUMENT;
    }
    for (auto value : array) {
      double double_value;
      auto error = value.get_double().get(double_value);
      if (error != simdjson::SUCCESS) {
        return GRN_INVALID_ARGUMENT;
      }
      auto rc = grn::bulk::put(ctx, caster->dest, double_value);
      if (rc != GRN_SUCCESS) {
        return rc;
      }
    }
    return GRN_SUCCESS;
  }

  template <typename Document>
  grn_rc
  cast_text_to_uvector_simdjson_reference_weight(grn_ctx *ctx,
                                                 grn_caster *caster,
                                                 Document &document)
  {
    grn::SharedObj domain(ctx, caster->dest->header.domain);
    if (!grn_obj_is_table_with_key(ctx, domain.get())) {
      return GRN_INVALID_ARGUMENT;
    }

    simdjson::ondemand::array array;
    simdjson::ondemand::object object;
    if (document.get_array().get(array) == simdjson::SUCCESS) {
      for (auto value : array) {
        simdjson::ondemand::object object;
        auto error = value.get_object().get(object);
        if (error != simdjson::SUCCESS) {
          return GRN_INVALID_ARGUMENT;
        }
        for (auto field : object) {
          std::string_view name;
          if (field.unescaped_key().get(name) != simdjson::SUCCESS) {
            return GRN_INVALID_ARGUMENT;
          }
          double weight;
          if (field.value().get_double().get(weight) != simdjson::SUCCESS) {
            return GRN_INVALID_ARGUMENT;
          }
          auto rc = json_to_weight_uvector_add(ctx,
                                               caster,
                                               domain.get(),
                                               name.data(),
                                               name.length(),
                                               weight);
          if (rc != GRN_SUCCESS) {
            return rc;
          }
        }
      }
      return GRN_SUCCESS;
    } else if (document.get_object().get(object) == simdjson::SUCCESS) {
      for (auto field : object) {
        std::string_view name;
        if (field.unescaped_key().get(name) != simdjson::SUCCESS) {
          return GRN_INVALID_ARGUMENT;
        }
        double weight;
        if (field.value().get_double().get(weight) != simdjson::SUCCESS) {
          return GRN_INVALID_ARGUMENT;
        }
        auto rc = json_to_weight_uvector_add(ctx,
                                             caster,
                                             domain.get(),
                                             name.data(),
                                             name.length(),
                                             weight);
        if (rc != GRN_SUCCESS) {
          return rc;
        }
      }
      return GRN_SUCCESS;
    } else {
      return GRN_INVALID_ARGUMENT;
    }
  }

  template <typename Document>
  grn_rc
  cast_text_to_uvector_simdjson_reference(grn_ctx *ctx,
                                          grn_caster *caster,
                                          Document &document)
  {
    const uint32_t missing_mode = (caster->flags & GRN_OBJ_MISSING_MASK);

    simdjson::ondemand::array array;
    if (document.get_array().get(array) != simdjson::SUCCESS) {
      return GRN_INVALID_ARGUMENT;
    }

    grn::SharedObj domain(ctx, caster->dest->header.domain);
    for (auto value : array) {
      grn_obj grn_value;
      GRN_VOID_INIT(&grn_value);
      grn::UniqueObj unique_grn_value(ctx, &grn_value);
      std::string_view string_value;
      uint64_t uint64_value;
      int64_t int64_value;
      simdjson::ondemand::object object;
      if (value.get_string().get(string_value) == simdjson::SUCCESS) {
        grn_obj_reinit(ctx,
                       &grn_value,
                       GRN_DB_SHORT_TEXT,
                       GRN_OBJ_DO_SHALLOW_COPY);
        GRN_TEXT_SET(ctx,
                     &grn_value,
                     string_value.data(),
                     string_value.length());
      } else if (value.get_uint64().get(uint64_value) == simdjson::SUCCESS) {
        grn_obj_reinit(ctx, &grn_value, GRN_DB_UINT64, 0);
        GRN_UINT64_SET(ctx, &grn_value, uint64_value);
      } else if (value.get_int64().get(int64_value) == simdjson::SUCCESS) {
        grn_obj_reinit(ctx, &grn_value, GRN_DB_INT64, 0);
        GRN_INT64_SET(ctx, &grn_value, int64_value);
      } else if (value.get_object().get(object) == simdjson::SUCCESS) {
      } else {
        return GRN_INVALID_ARGUMENT;
      }

      if (grn_value.header.domain == GRN_DB_VOID) {
        // TODO: Nested object isn't supported yet.
        Record record(ctx, domain.get());
        for (auto field : object) {
          std::string_view name;
          if (field.unescaped_key().get(name) != simdjson::SUCCESS) {
            return GRN_INVALID_ARGUMENT;
          }
          if (!record.add_key(name)) {
            return GRN_INVALID_ARGUMENT;
          }
          auto value = field.value();
          bool bool_value;
          int64_t int64_value;
          uint64_t uint64_value;
          double double_value;
          std::string_view string_value;
          if (value.get_bool().get(bool_value) == simdjson::SUCCESS) {
            record.add_bool_value(bool_value);
          } else if (value.get_int64().get(int64_value) == simdjson::SUCCESS) {
            record.add_int64_value(int64_value);
          } else if (value.get_uint64().get(uint64_value) ==
                     simdjson::SUCCESS) {
            record.add_uint64_value(uint64_value);
          } else if (value.get_double().get(double_value) ==
                     simdjson::SUCCESS) {
            record.add_double_value(double_value);
          } else if (value.get_string().get(string_value) ==
                     simdjson::SUCCESS) {
            record.add_string_value(string_value);
          } else {
            return GRN_INVALID_ARGUMENT;
          }
        }
        grn_id id = GRN_ID_NIL;
        if (!record.add_to_table(caster, &id)) {
          return GRN_INVALID_ARGUMENT;
        }
        if (id != GRN_ID_NIL) {
          auto rc = grn_uvector_add_element_record(ctx, caster->dest, id, 0);
          if (rc != GRN_SUCCESS) {
            return rc;
          }
        }
      } else {
        if (grn_obj_is_table_with_key(ctx, domain.get())) {
          grn_obj casted_value;
          GRN_RECORD_INIT(&casted_value, GRN_BULK, caster->dest->header.domain);
          grn::UniqueObj unique_casted_value(ctx, &casted_value);
          grn_caster value_caster = {
            &grn_value,
            &casted_value,
            caster->flags,
            caster->target,
          };
          auto rc = grn_caster_cast(ctx, &value_caster);
          grn_id id = GRN_ID_NIL;
          if (rc == GRN_SUCCESS && GRN_BULK_VSIZE(&casted_value) > 0) {
            id = GRN_RECORD_VALUE(&casted_value);
          }
          if (id == GRN_ID_NIL) {
            if (ctx->rc == GRN_SUCCESS) {
              if (missing_mode != GRN_OBJ_MISSING_NIL) {
                continue;
              }
            } else {
              ERRCLR(ctx);
              continue;
            }
          }
          rc = grn_uvector_add_element_record(ctx, caster->dest, id, 0);
          if (rc != GRN_SUCCESS) {
            return rc;
          }
        } else {
          if (grn_value.header.domain != GRN_DB_UINT64) {
            return GRN_INVALID_ARGUMENT;
          }
          auto rc = grn_uvector_add_element_record(ctx,
                                                   caster->dest,
                                                   GRN_UINT64_VALUE(&grn_value),
                                                   0);
          if (rc != GRN_SUCCESS) {
            return rc;
          }
        }
      }
    }

    return GRN_SUCCESS;
  }

  grn_rc
  cast_text_to_uvector_simdjson(grn_ctx *ctx, grn_caster *caster)
  {
    auto rc = grn_bulk_reserve(ctx, caster->src, simdjson::SIMDJSON_PADDING);
    if (rc != GRN_SUCCESS) {
      return rc;
    }

    simdjson::ondemand::parser parser;
    auto document = parser.iterate(GRN_TEXT_VALUE(caster->src),
                                   GRN_TEXT_LEN(caster->src),
                                   GRN_BULK_WSIZE(caster->src));
    if (document.error() != simdjson::SUCCESS) {
      return GRN_INVALID_ARGUMENT;
    }

    switch (caster->dest->header.domain) {
    case GRN_DB_INT8:
    case GRN_DB_INT16:
    case GRN_DB_INT32:
    case GRN_DB_INT64:
      return cast_text_to_uvector_simdjson_int64(ctx, caster, document);
    case GRN_DB_UINT8:
    case GRN_DB_UINT16:
    case GRN_DB_UINT32:
    case GRN_DB_UINT64:
      return cast_text_to_uvector_simdjson_uint64(ctx, caster, document);
    case GRN_DB_FLOAT32:
    case GRN_DB_FLOAT:
      return cast_text_to_uvector_simdjson_double(ctx, caster, document);
    default:
      if (grn_obj_is_weight_uvector(ctx, caster->dest)) {
        return cast_text_to_uvector_simdjson_reference_weight(ctx,
                                                              caster,
                                                              document);
      } else {
        return cast_text_to_uvector_simdjson_reference(ctx, caster, document);
      }
    }
  }
#  endif

#  ifdef GRN_WITH_RAPIDJSON
  template <typename Handler>
  grn_rc
  json_to_uvector_rapidjson(grn_ctx *ctx,
                            RAPIDJSON_NAMESPACE::Document *document,
                            grn_caster *caster)
  {
    Handler handler(ctx, caster);
    if (document->IsArray()) {
      auto n = document->Size();
      for (size_t i = 0; i < n; ++i) {
        const auto &element = (*document)[i];
        if (!element.Accept(handler)) {
          return GRN_INVALID_ARGUMENT;
        }
      }
      return GRN_SUCCESS;
    } else if (document->IsObject()) {
      for (auto member = document->MemberBegin();
           member != document->MemberEnd();
           ++member) {
        if (!member->name.IsString()) {
          return GRN_INVALID_ARGUMENT;
        }
        if (!member->value.IsNumber()) {
          return GRN_INVALID_ARGUMENT;
        }
        if (!member->value.Accept(handler)) {
          return GRN_INVALID_ARGUMENT;
        }
        if (!member->name.Accept(handler)) {
          return GRN_INVALID_ARGUMENT;
        }
      }
      return GRN_SUCCESS;
    } else {
      return GRN_INVALID_ARGUMENT;
    }
  }

  grn_rc
  cast_text_to_uvector_rapidjson(grn_ctx *ctx, grn_caster *caster)
  {
    RAPIDJSON_NAMESPACE::Document document;
    RAPIDJSON_NAMESPACE::MemoryStream stream(GRN_TEXT_VALUE(caster->src),
                                             GRN_TEXT_LEN(caster->src));
    document.ParseStream(stream);
    if (document.HasParseError()) {
      return GRN_INVALID_ARGUMENT;
    }

    switch (caster->dest->header.domain) {
    case GRN_DB_INT8:
      return json_to_uvector_rapidjson<Int8Handler>(ctx, &document, caster);
    case GRN_DB_UINT8:
      return json_to_uvector_rapidjson<UInt8Handler>(ctx, &document, caster);
    case GRN_DB_INT16:
      return json_to_uvector_rapidjson<Int16Handler>(ctx, &document, caster);
    case GRN_DB_UINT16:
      return json_to_uvector_rapidjson<UInt16Handler>(ctx, &document, caster);
    case GRN_DB_INT32:
      return json_to_uvector_rapidjson<Int32Handler>(ctx, &document, caster);
    case GRN_DB_UINT32:
      return json_to_uvector_rapidjson<UInt32Handler>(ctx, &document, caster);
    case GRN_DB_INT64:
      return json_to_uvector_rapidjson<Int64Handler>(ctx, &document, caster);
    case GRN_DB_UINT64:
      return json_to_uvector_rapidjson<UInt64Handler>(ctx, &document, caster);
    case GRN_DB_FLOAT:
      return json_to_uvector_rapidjson<FloatHandler>(ctx, &document, caster);
    case GRN_DB_FLOAT32:
      return json_to_uvector_rapidjson<Float32Handler>(ctx, &document, caster);
    default:
      {
        grn_rc rc = GRN_INVALID_ARGUMENT;
        auto domain = grn_ctx_at(ctx, caster->dest->header.domain);
        if (grn_obj_is_weight_uvector(ctx, caster->dest)) {
          if (grn_obj_is_table_with_key(ctx, domain)) {
            rc = json_to_uvector_rapidjson<TableWeightHandler>(ctx,
                                                               &document,
                                                               caster);
          }
        } else {
          TableHandler handler(ctx, caster);
          if (document.Accept(handler)) {
            rc = GRN_SUCCESS;
          }
        }
        grn_obj_unref(ctx, domain);
        return rc;
      }
    }
  }
#  endif

  grn_rc
  cast_text_to_uvector(grn_ctx *ctx, grn_caster *caster)
  {
    if (!json_maybe_container(GRN_TEXT_VALUE(caster->src),
                              GRN_TEXT_LEN(caster->src))) {
      return GRN_INVALID_ARGUMENT;
    }

#  ifdef GRN_WITH_SIMDJSON
    return cast_text_to_uvector_simdjson(ctx, caster);
#  elif defined(GRN_WITH_RAPIDJSON)
    return cast_text_to_uvector_rapidjson(ctx, caster);
#  endif
  }

#  ifdef GRN_WITH_SIMDJSON
  grn_rc
  cast_text_to_text_vector_simdjson(grn_ctx *ctx, grn_caster *caster)
  {
    auto rc = grn_bulk_reserve(ctx, caster->src, simdjson::SIMDJSON_PADDING);
    if (rc != GRN_SUCCESS) {
      return rc;
    }
    simdjson::ondemand::parser parser;
    auto document = parser.iterate(GRN_TEXT_VALUE(caster->src),
                                   GRN_TEXT_LEN(caster->src),
                                   GRN_BULK_WSIZE(caster->src));
    simdjson::ondemand::array array;
    auto error = document.get_array().get(array);
    if (error == simdjson::SUCCESS) {
      for (auto value : array) {
        std::string_view text;
        error = value.get_string().get(text);
        if (error != simdjson::SUCCESS) {
          return GRN_INVALID_ARGUMENT;
        }
        rc = grn_vector_add_element_float(ctx,
                                          caster->dest,
                                          text.data(),
                                          text.length(),
                                          0.0,
                                          GRN_DB_SHORT_TEXT);
        if (rc != GRN_SUCCESS) {
          return rc;
        }
      }
      return GRN_SUCCESS;
    } else {
      return GRN_INVALID_ARGUMENT;
    }
  }
#  endif

#  ifdef GRN_WITH_RAPIDJSON
  grn_rc
  cast_text_to_text_vector_rapidjson(grn_ctx *ctx, grn_caster *caster)
  {
    RAPIDJSON_NAMESPACE::Document document;
    RAPIDJSON_NAMESPACE::MemoryStream stream(GRN_TEXT_VALUE(caster->src),
                                             GRN_TEXT_LEN(caster->src));
    document.ParseStream(stream);
    if (document.HasParseError()) {
      return GRN_INVALID_ARGUMENT;
    }

    TextHandler handler(ctx, caster);
    if (document.IsArray()) {
      auto n = document.Size();
      for (size_t i = 0; i < n; ++i) {
        const auto &element = document[i];
        if (!element.Accept(handler)) {
          return GRN_INVALID_ARGUMENT;
        }
      }
      return GRN_SUCCESS;
    } else {
      return GRN_INVALID_ARGUMENT;
    }
  }
#  endif

  grn_rc
  cast_text_to_text_vector(grn_ctx *ctx, grn_caster *caster)
  {
#  ifdef GRN_WITH_SIMDJSON
    return cast_text_to_text_vector_simdjson(ctx, caster);
#  elif defined(GRN_WITH_RAPIDJSON)
    return cast_text_to_text_vector_rapidjson(ctx, caster);
#  endif
  }
} // namespace
#endif

// NOTE: We may need to change the following current design:
//
// This is called for a whole value of a scalar column and an element
// value of a vector column.
//
// If this is called for a whole value of a scalar column, an error is
// reported as both of an error log and an return value with
// GRN_OBJ_INVALID_ERROR.
//
// If this is called for an element value for a vector column, an
// error is reported as only an error log with
// GRN_OBJ_INVALID_ERROR. Return value is GRN_SUCCESS.
//
// Calling a cast function only for a whole value may be better for
// consistent implementation but there are custom cast processes in
// load.c and arrow.cpp for a vector value. We can reconsider the
// current design later.
static inline grn_rc
grn_caster_cast_to_record(grn_ctx *ctx, grn_caster *caster)
{
  grn_rc rc = GRN_SUCCESS;

  grn_obj *table = grn_ctx_at(ctx, caster->dest->header.domain);
  if (!GRN_OBJ_TABLEP(table)) {
    grn_obj_unref(ctx, table);
    return GRN_FUNCTION_NOT_IMPLEMENTED;
  }

  uint32_t missing_mode = (caster->flags & GRN_OBJ_MISSING_MASK);
  uint32_t invalid_mode = (caster->flags & GRN_OBJ_INVALID_MASK);
  grn_id id = GRN_ID_NIL;
  if (table->header.type != GRN_TABLE_NO_KEY) {
    grn_obj *p_key = caster->src;
    grn_obj key;
    GRN_OBJ_INIT(&key, GRN_BULK, 0, table->header.domain);
    if (!grn_type_id_is_compatible(ctx,
                                   caster->src->header.domain,
                                   table->header.domain)) {
      grn_caster key_caster = {
        caster->src,
        &key,
        caster->flags,
        caster->target,
      };
      rc = grn_caster_cast(ctx, &key_caster);
      p_key = &key;
    }
    if (rc == GRN_SUCCESS) {
      if (GRN_BULK_VSIZE(p_key) > 0) {
        grn_table_add_options options;
        memset(&options, 0, sizeof(grn_table_add_options));
        options.ignore_empty_normalized_key = true;
        if (missing_mode == GRN_OBJ_MISSING_ADD) {
          id = grn_table_add_by_key(ctx, table, p_key, &options);
        } else {
          id = grn_table_get_by_key(ctx, table, p_key);
        }
        if (id == GRN_ID_NIL && !options.ignored) {
          if (invalid_mode == GRN_OBJ_INVALID_ERROR) {
            rc = GRN_INVALID_ARGUMENT;
            bool called_from_grn_obj_cast = (caster->target == NULL);
            if (missing_mode != GRN_OBJ_MISSING_ADD &&
                !called_from_grn_obj_cast /* For backward compatibility */) {
              CAST_FAILED(caster);
              ERRCLR(ctx);
            }
          } else {
            ERRCLR(ctx);
            if (missing_mode == GRN_OBJ_MISSING_NIL) {
              GRN_RECORD_SET(ctx, caster->dest, GRN_ID_NIL);
            }
            CAST_FAILED(caster);
          }
        } else {
          GRN_RECORD_SET(ctx, caster->dest, id);
        }
      } else {
        if (missing_mode != GRN_OBJ_MISSING_IGNORE) {
          GRN_RECORD_SET(ctx, caster->dest, GRN_ID_NIL);
        }
      }
    }
    GRN_OBJ_FIN(ctx, &key);
  } else {
    grn_obj record_id;
    GRN_UINT32_INIT(&record_id, 0);
    grn_caster record_caster = {
      caster->src,
      &record_id,
      caster->flags,
      caster->target,
    };
    rc = grn_caster_cast(ctx, &record_caster);
    if (rc == GRN_SUCCESS) {
      bool valid = true;
      if (GRN_BULK_VSIZE(&record_id) == 0) {
        if (missing_mode == GRN_OBJ_MISSING_NIL) {
          id = GRN_ID_NIL;
        } else {
          valid = false;
        }
      } else {
        id = GRN_UINT32_VALUE(&record_id);
        if (!(GRN_ID_NIL < id && id <= GRN_ID_MAX &&
              grn_table_at(ctx, table, id) == id)) {
          valid = false;
        }
      }
      if (valid) {
        GRN_RECORD_SET(ctx, caster->dest, id);
      } else {
        CAST_FAILED(caster);
        rc = ctx->rc;
      }
    }
  }

  grn_obj_unref(ctx, table);

  return rc;
}

static inline grn_rc
grn_caster_cast_bool(grn_ctx *ctx, grn_caster *caster)
{
  grn_rc rc = GRN_SUCCESS;

  switch (caster->dest->header.domain) {
  case GRN_DB_BOOL:
    GRN_BOOL_SET(ctx, caster->dest, GRN_BOOL_VALUE(caster->src));
    break;
  case GRN_DB_INT8:
    GRN_INT8_SET(ctx, caster->dest, GRN_BOOL_VALUE(caster->src));
    break;
  case GRN_DB_UINT8:
    GRN_UINT8_SET(ctx, caster->dest, GRN_BOOL_VALUE(caster->src));
    break;
  case GRN_DB_INT16:
    GRN_INT16_SET(ctx, caster->dest, GRN_BOOL_VALUE(caster->src));
    break;
  case GRN_DB_UINT16:
    GRN_UINT16_SET(ctx, caster->dest, GRN_BOOL_VALUE(caster->src));
    break;
  case GRN_DB_INT32:
    GRN_INT32_SET(ctx, caster->dest, GRN_BOOL_VALUE(caster->src));
    break;
  case GRN_DB_UINT32:
    GRN_UINT32_SET(ctx, caster->dest, GRN_BOOL_VALUE(caster->src));
    break;
  case GRN_DB_INT64:
    GRN_INT64_SET(ctx, caster->dest, GRN_BOOL_VALUE(caster->src));
    break;
  case GRN_DB_UINT64:
    GRN_UINT64_SET(ctx, caster->dest, GRN_BOOL_VALUE(caster->src));
    break;
  case GRN_DB_FLOAT32:
    GRN_FLOAT32_SET(ctx, caster->dest, GRN_BOOL_VALUE(caster->src));
    break;
  case GRN_DB_FLOAT:
    GRN_FLOAT_SET(ctx, caster->dest, GRN_BOOL_VALUE(caster->src));
    break;
  case GRN_DB_TIME:
    GRN_TIME_SET(ctx, caster->dest, GRN_BOOL_VALUE(caster->src));
    break;
  case GRN_DB_SHORT_TEXT:
  case GRN_DB_TEXT:
  case GRN_DB_LONG_TEXT:
    {
      const char *bool_text;
      bool_text = GRN_BOOL_VALUE(caster->src) ? "true" : "false";
      GRN_TEXT_PUTS(ctx, caster->dest, bool_text);
    }
    break;
  case GRN_DB_TOKYO_GEO_POINT:
  case GRN_DB_WGS84_GEO_POINT:
    rc = GRN_INVALID_ARGUMENT;
    break;
  default:
    rc = grn_caster_cast_to_record(ctx, caster);
    break;
  }
  return rc;
}

namespace {
  template <typename NUMERIC>
  grn_rc
  num2time(grn_ctx *ctx, grn_caster *caster, NUMERIC value)
  {
    switch (caster->src->header.domain) {
    case GRN_DB_TIME:
    case GRN_DB_FLOAT32:
    case GRN_DB_FLOAT:
      return grn::bulk::put<NUMERIC>(ctx, caster->dest, value);
    default:
      return grn::bulk::put<int64_t>(ctx,
                                     caster->dest,
                                     static_cast<int64_t>(value) *
                                       GRN_TIME_USEC_PER_SEC);
    }
  }

  template <typename FLOATING_POINT, typename NUMERIC>
  std::enable_if_t<std::is_floating_point_v<FLOATING_POINT>, grn_rc>
  num2float(grn_ctx *ctx, grn_caster *caster, NUMERIC value)
  {
    if (caster->src->header.domain == GRN_DB_TIME) {
      return grn::bulk::put<FLOATING_POINT>(ctx,
                                            caster->dest,
                                            static_cast<FLOATING_POINT>(value) /
                                              GRN_TIME_USEC_PER_SEC);
    } else {
      return grn::bulk::put<FLOATING_POINT>(ctx, caster->dest, value);
    }
  }

#ifdef GRN_HAVE_BFLOAT16
  template <typename FLOATING_POINT, typename NUMERIC>
  std::enable_if_t<std::is_same_v<FLOATING_POINT, grn_bfloat16> &&
                     std::is_same_v<NUMERIC, grn_bfloat16>,
                   grn_rc>
  num2float(grn_ctx *ctx, grn_caster *caster, NUMERIC value)
  {
    if (caster->src->header.domain == GRN_DB_TIME) {
      return grn::bulk::put<FLOATING_POINT>(ctx,
                                            caster->dest,
                                            grn_bfloat32_to_float32(value) /
                                              GRN_TIME_USEC_PER_SEC);
    } else {
      return grn::bulk::put<FLOATING_POINT>(ctx, caster->dest, value);
    }
  }

  template <typename FLOATING_POINT, typename NUMERIC>
  std::enable_if_t<std::is_same_v<FLOATING_POINT, grn_bfloat16> &&
                     !std::is_same_v<NUMERIC, grn_bfloat16>,
                   grn_rc>
  num2float(grn_ctx *ctx, grn_caster *caster, NUMERIC value)
  {
    if (caster->src->header.domain == GRN_DB_TIME) {
      return grn::bulk::put<FLOATING_POINT>(
        ctx,
        caster->dest,
        grn::numeric::to_bfloat16(static_cast<double>(value) /
                                  GRN_TIME_USEC_PER_SEC));
    } else {
      return grn::bulk::put<NUMERIC>(ctx, caster->dest, value);
    }
  }
#endif

  template <typename NUMERIC>
  std::enable_if_t<std::is_integral_v<NUMERIC> && std::is_signed_v<NUMERIC>,
                   grn_rc>
  num2text(grn_ctx *ctx, grn_caster *caster, NUMERIC value)
  {
    return grn_text_lltoa(ctx, caster->dest, value);
  }

  template <typename NUMERIC>
  std::enable_if_t<std::is_integral_v<NUMERIC> && !std::is_signed_v<NUMERIC>,
                   grn_rc>
  num2text(grn_ctx *ctx, grn_caster *caster, NUMERIC value)
  {
    return grn_text_ulltoa(ctx, caster->dest, value);
  }

  template <typename NUMERIC>
  std::enable_if_t<std::is_same_v<NUMERIC, float>, grn_rc>
  num2text(grn_ctx *ctx, grn_caster *caster, NUMERIC value)
  {
    return grn_text_f32toa(ctx, caster->dest, value);
  }

  template <typename NUMERIC>
  std::enable_if_t<std::is_same_v<NUMERIC, double>, grn_rc>
  num2text(grn_ctx *ctx, grn_caster *caster, NUMERIC value)
  {
    return grn_text_ftoa(ctx, caster->dest, value);
  }

  template <typename SOURCE>
  grn_rc
  num2dest_bulk(grn_ctx *ctx, grn_caster *caster)
  {
    switch (caster->dest->header.domain) {
    case GRN_DB_BOOL:
      return grn::bulk::put<SOURCE>(
        ctx,
        caster->dest,
        grn::bulk::get<SOURCE>(ctx, caster->src, 0));
    case GRN_DB_INT8:
      return grn::bulk::put<int8_t>(
        ctx,
        caster->dest,
        grn::bulk::get<SOURCE>(ctx, caster->src, 0));
    case GRN_DB_UINT8:
      return grn::bulk::put<uint8_t>(
        ctx,
        caster->dest,
        grn::bulk::get<SOURCE>(ctx, caster->src, 0));
    case GRN_DB_INT16:
      return grn::bulk::put<int16_t>(
        ctx,
        caster->dest,
        grn::bulk::get<SOURCE>(ctx, caster->src, 0));
    case GRN_DB_UINT16:
      return grn::bulk::put<uint16_t>(
        ctx,
        caster->dest,
        grn::bulk::get<SOURCE>(ctx, caster->src, 0));
    case GRN_DB_INT32:
      return grn::bulk::put<int32_t>(
        ctx,
        caster->dest,
        grn::bulk::get<SOURCE>(ctx, caster->src, 0));
    case GRN_DB_UINT32:
      return grn::bulk::put<uint32_t>(
        ctx,
        caster->dest,
        grn::bulk::get<SOURCE>(ctx, caster->src, 0));
    case GRN_DB_INT64:
      return grn::bulk::put<int64_t>(
        ctx,
        caster->dest,
        grn::bulk::get<SOURCE>(ctx, caster->src, 0));
    case GRN_DB_UINT64:
      return grn::bulk::put<uint64_t>(
        ctx,
        caster->dest,
        grn::bulk::get<SOURCE>(ctx, caster->src, 0));
    case GRN_DB_TIME:
      return num2time(ctx, caster, grn::bulk::get<SOURCE>(ctx, caster->src, 0));
#ifdef GRN_HAVE_BFLOAT16
    case GRN_DB_BFLOAT16:
      return num2float<grn_bfloat16>(
        ctx,
        caster,
        grn::bulk::get<SOURCE>(ctx, caster->src, 0));
#endif
    case GRN_DB_FLOAT32:
      return num2float<float>(ctx,
                              caster,
                              grn::bulk::get<SOURCE>(ctx, caster->src, 0));
    case GRN_DB_FLOAT:
      return num2float<double>(ctx,
                               caster,
                               grn::bulk::get<SOURCE>(ctx, caster->src, 0));
    case GRN_DB_SHORT_TEXT:
    case GRN_DB_TEXT:
    case GRN_DB_LONG_TEXT:
      return num2text(ctx, caster, grn::bulk::get<SOURCE>(ctx, caster->src, 0));
    case GRN_DB_TOKYO_GEO_POINT:
    case GRN_DB_WGS84_GEO_POINT:
      return GRN_INVALID_ARGUMENT;
    default:
      return grn_caster_cast_to_record(ctx, caster);
    }
  }

  template <typename SOURCE>
  grn_rc
  num2dest(grn_ctx *ctx, grn_caster *caster)
  {
    switch (caster->src->header.type) {
    case GRN_BULK:
      return num2dest_bulk<SOURCE>(ctx, caster);
    case GRN_UVECTOR:
      {
        grn_obj sub_src;
        GRN_VALUE_FIX_SIZE_INIT(&sub_src, 0, caster->src->header.domain);
        grn_caster sub_caster = {
          &sub_src,
          caster->dest,
          caster->flags,
          caster->target,
        };
        auto raw_values =
          reinterpret_cast<SOURCE *>(GRN_BULK_HEAD(caster->src));
        auto n = GRN_BULK_VSIZE(caster->src) / sizeof(SOURCE);
        grn_rc rc = GRN_SUCCESS;
        for (size_t i = 0; i < n && rc == GRN_SUCCESS; i++) {
          auto raw_value = raw_values[i];
          GRN_TEXT_SET(ctx, &sub_src, &raw_value, sizeof(SOURCE));
          rc = num2dest_bulk<SOURCE>(ctx, &sub_caster);
        }
        GRN_OBJ_FIN(ctx, &sub_src);
        return rc;
      }
    default:
      return GRN_FUNCTION_NOT_IMPLEMENTED;
    }
  }
} // namespace

#define TEXT2DEST(type, tonum, setvalue)                                       \
  do {                                                                         \
    const char *cur, *str = GRN_TEXT_VALUE(caster->src);                       \
    const char *str_end = GRN_BULK_CURR(caster->src);                          \
    type i = tonum(str, str_end, &cur);                                        \
    if (cur == str_end) {                                                      \
      setvalue(ctx, caster->dest, i);                                          \
    } else if (cur != str) {                                                   \
      const char *rest;                                                        \
      grn_obj buf;                                                             \
      GRN_VOID_INIT(&buf);                                                     \
      rc = grn_aton(ctx, str, str_end, &rest, &buf);                           \
      if (rc == GRN_SUCCESS) {                                                 \
        if (rest == str_end) {                                                 \
          grn_caster number_caster = {                                         \
            &buf,                                                              \
            caster->dest,                                                      \
            caster->flags,                                                     \
            caster->target,                                                    \
          };                                                                   \
          rc = grn_caster_cast(ctx, &number_caster);                           \
        } else {                                                               \
          rc = GRN_INVALID_ARGUMENT;                                           \
        }                                                                      \
      }                                                                        \
      GRN_OBJ_FIN(ctx, &buf);                                                  \
    } else {                                                                   \
      rc = GRN_INVALID_ARGUMENT;                                               \
    }                                                                          \
  } while (0)

static grn_rc
grn_caster_cast_text_to_bulk(grn_ctx *ctx, grn_caster *caster)
{
  grn_rc rc = GRN_SUCCESS;
  switch (caster->dest->header.domain) {
  case GRN_DB_BOOL:
    GRN_BOOL_SET(ctx, caster->dest, GRN_TEXT_LEN(caster->src) > 0);
    break;
  case GRN_DB_INT8:
    TEXT2DEST(int8_t, grn_atoi8, GRN_INT8_SET);
    break;
  case GRN_DB_UINT8:
    TEXT2DEST(uint8_t, grn_atoui8, GRN_UINT8_SET);
    break;
  case GRN_DB_INT16:
    TEXT2DEST(int16_t, grn_atoi16, GRN_INT16_SET);
    break;
  case GRN_DB_UINT16:
    TEXT2DEST(uint16_t, grn_atoui16, GRN_UINT16_SET);
    break;
  case GRN_DB_INT32:
    TEXT2DEST(int32_t, grn_atoi, GRN_INT32_SET);
    break;
  case GRN_DB_UINT32:
    TEXT2DEST(uint32_t, grn_atoui, GRN_UINT32_SET);
    break;
  case GRN_DB_TIME:
    {
      grn_timeval v;
      int len = GRN_TEXT_LEN(caster->src);
      char *str = GRN_TEXT_VALUE(caster->src);
      if (grn_str2timeval(str, len, &v)) {
        double d;
        char *end;
        grn_obj buf;
        GRN_TEXT_INIT(&buf, 0);
        GRN_TEXT_PUT(ctx, &buf, str, len);
        GRN_TEXT_PUTC(ctx, &buf, '\0');
        errno = 0;
        d = strtod(GRN_TEXT_VALUE(&buf), &end);
        if (!errno && end + 1 == GRN_BULK_CURR(&buf)) {
          v.tv_sec = d;
          v.tv_nsec = ((d - v.tv_sec) * GRN_TIME_NSEC_PER_SEC);
        } else {
          rc = GRN_INVALID_ARGUMENT;
        }
        GRN_OBJ_FIN(ctx, &buf);
      }
      GRN_TIME_SET(
        ctx,
        caster->dest,
        GRN_TIME_PACK((int64_t)v.tv_sec, GRN_TIME_NSEC_TO_USEC(v.tv_nsec)));
    }
    break;
  case GRN_DB_INT64:
    TEXT2DEST(int64_t, grn_atoll, GRN_INT64_SET);
    break;
  case GRN_DB_UINT64:
    TEXT2DEST(int64_t, grn_atoll, GRN_UINT64_SET);
    break;
#ifdef GRN_HAVE_BFLOAT16
  case GRN_DB_BFLOAT16:
#endif
  case GRN_DB_FLOAT32:
  case GRN_DB_FLOAT:
    {
      char *end;
      grn_obj buf;
      GRN_TEXT_INIT(&buf, 0);
      GRN_TEXT_PUT(ctx,
                   &buf,
                   GRN_TEXT_VALUE(caster->src),
                   GRN_TEXT_LEN(caster->src));
      GRN_TEXT_PUTC(ctx, &buf, '\0');
      errno = 0;
      if (caster->dest->header.domain == GRN_DB_FLOAT) {
        double value;
        value = strtod(GRN_TEXT_VALUE(&buf), &end);
        if (!errno && end + 1 == GRN_BULK_CURR(&buf)) {
          GRN_FLOAT_SET(ctx, caster->dest, value);
        } else {
          rc = GRN_INVALID_ARGUMENT;
        }
      } else {
        float value;
        value = strtof(GRN_TEXT_VALUE(&buf), &end);
        if (!errno && end + 1 == GRN_BULK_CURR(&buf)) {
          if (caster->dest->header.domain == GRN_DB_FLOAT32) {
            GRN_FLOAT32_SET(ctx, caster->dest, value);
          } else {
#ifdef GRN_HAVE_BFLOAT16
            grn::bulk::put(ctx, caster->dest, value);
#endif
          }
        } else {
          rc = GRN_INVALID_ARGUMENT;
        }
      }
      GRN_OBJ_FIN(ctx, &buf);
    }
    break;
  case GRN_DB_SHORT_TEXT:
  case GRN_DB_TEXT:
  case GRN_DB_LONG_TEXT:
    GRN_TEXT_PUT(ctx,
                 caster->dest,
                 GRN_TEXT_VALUE(caster->src),
                 GRN_TEXT_LEN(caster->src));
    break;
  case GRN_DB_TOKYO_GEO_POINT:
  case GRN_DB_WGS84_GEO_POINT:
    {
      int latitude, longitude;
      double degree;
      const char *cur, *str = GRN_TEXT_VALUE(caster->src);
      const char *str_end = GRN_BULK_CURR(caster->src);
      if (str == str_end) {
        GRN_GEO_POINT_SET(ctx, caster->dest, 0, 0);
      } else {
        char *end;
        grn_obj buf, *buf_p = NULL;
        latitude = grn_atoi(str, str_end, &cur);
        if (cur < str_end && cur[0] == '.') {
          GRN_TEXT_INIT(&buf, 0);
          GRN_TEXT_PUT(ctx, &buf, str, GRN_TEXT_LEN(caster->src));
          GRN_TEXT_PUTC(ctx, &buf, '\0');
          buf_p = &buf;
          errno = 0;
          degree = strtod(GRN_TEXT_VALUE(buf_p), &end);
          if (errno) {
            rc = GRN_INVALID_ARGUMENT;
          } else {
            latitude = GRN_GEO_DEGREE2MSEC(degree);
            cur = str + (end - GRN_TEXT_VALUE(buf_p));
          }
        }
        if (!rc && (cur[0] == 'x' || cur[0] == ',') && cur + 1 < str_end) {
          const char *c = cur + 1;
          longitude = grn_atoi(c, str_end, &cur);
          if (cur < str_end && cur[0] == '.') {
            if (!buf_p) {
              GRN_TEXT_INIT(&buf, 0);
              GRN_TEXT_PUT(ctx, &buf, str, GRN_TEXT_LEN(caster->src));
              GRN_TEXT_PUTC(ctx, &buf, '\0');
              buf_p = &buf;
            }
            errno = 0;
            degree = strtod(GRN_TEXT_VALUE(buf_p) + (c - str), &end);
            if (errno) {
              rc = GRN_INVALID_ARGUMENT;
            } else {
              longitude = GRN_GEO_DEGREE2MSEC(degree);
              cur = str + (end - GRN_TEXT_VALUE(buf_p));
            }
          }
          if (!rc && cur == str_end) {
            if ((GRN_GEO_MIN_LATITUDE <= latitude &&
                 latitude <= GRN_GEO_MAX_LATITUDE) &&
                (GRN_GEO_MIN_LONGITUDE <= longitude &&
                 longitude <= GRN_GEO_MAX_LONGITUDE)) {
              GRN_GEO_POINT_SET(ctx, caster->dest, latitude, longitude);
            } else {
              rc = GRN_INVALID_ARGUMENT;
            }
          } else {
            rc = GRN_INVALID_ARGUMENT;
          }
        } else {
          rc = GRN_INVALID_ARGUMENT;
        }
        if (buf_p) {
          GRN_OBJ_FIN(ctx, buf_p);
        }
      }
    }
    break;
  default:
    rc = grn_caster_cast_to_record(ctx, caster);
    break;
  }
  return rc;
}

static grn_rc
grn_caster_cast_text(grn_ctx *ctx, grn_caster *caster)
{
  grn_rc rc = GRN_SUCCESS;
  switch (caster->dest->header.type) {
  case GRN_BULK:
    rc = grn_caster_cast_text_to_bulk(ctx, caster);
    break;
  case GRN_UVECTOR:
    rc = grn_caster_cast_text_to_uvector(ctx, caster);
    break;
  default:
    rc = GRN_INVALID_ARGUMENT;
    break;
  }
  return rc;
}

static grn_rc
grn_caster_cast_record_data(grn_ctx *ctx,
                            grn_caster *caster,
                            grn_obj *src_table)
{
  grn_obj *key_accessor = grn_obj_column(ctx,
                                         src_table,
                                         GRN_COLUMN_NAME_KEY,
                                         GRN_COLUMN_NAME_KEY_LEN);
  if (!key_accessor) {
    return ctx->rc;
  }

  grn_rc rc = GRN_SUCCESS;
  grn_obj key;
  GRN_VOID_INIT(&key);
  if (grn_obj_is_vector(ctx, caster->dest)) {
    if (grn_obj_is_uvector(ctx, caster->src)) {
      uint32_t i;
      uint32_t n = grn_uvector_size(ctx, caster->src);
      for (i = 0; i < n; i++) {
        GRN_BULK_REWIND(&key);
        grn_id src_id =
          grn_uvector_get_element_record(ctx, caster->src, i, NULL);
        grn_obj_get_value(ctx, key_accessor, src_id, &key);
        if (ctx->rc != GRN_SUCCESS) {
          rc = ctx->rc;
          break;
        }
        grn_caster key_caster = {
          &key,
          caster->dest,
          caster->flags,
          caster->target,
        };
        rc = grn_caster_cast(ctx, &key_caster);
        if (rc != GRN_SUCCESS) {
          break;
        }
      }
    } else {
      if (GRN_BULK_VSIZE(caster->src) > 0) {
        grn_obj_get_value(ctx,
                          key_accessor,
                          GRN_RECORD_VALUE(caster->src),
                          &key);
        if (ctx->rc == GRN_SUCCESS) {
          grn_caster key_caster = {
            &key,
            caster->dest,
            caster->flags,
            caster->target,
          };
          rc = grn_caster_cast(ctx, &key_caster);
        } else {
          rc = ctx->rc;
        }
      }
    }
  } else {
    if (GRN_BULK_VSIZE(caster->src) > 0) {
      grn_obj_get_value(ctx, key_accessor, GRN_RECORD_VALUE(caster->src), &key);
      if (ctx->rc == GRN_SUCCESS) {
        grn_caster key_caster = {
          &key,
          caster->dest,
          caster->flags,
          caster->target,
        };
        rc = grn_caster_cast(ctx, &key_caster);
      } else {
        rc = ctx->rc;
      }
    }
  }
  GRN_OBJ_FIN(ctx, &key);

  grn_obj_unlink(ctx, key_accessor);
  return rc;
}

static grn_rc
grn_caster_cast_record_record(grn_ctx *ctx,
                              grn_caster *caster,
                              grn_obj *src_table,
                              grn_obj *dest_table)
{
  if (GRN_RECORD_VALUE(caster->src) == GRN_ID_NIL) {
    if (grn_obj_is_uvector(ctx, caster->dest)) {
      grn_uvector_add_element_record(ctx,
                                     caster->dest,
                                     GRN_RECORD_VALUE(caster->src),
                                     0.0);
    } else {
      GRN_RECORD_PUT(ctx, caster->dest, GRN_RECORD_VALUE(caster->src));
    }
    return GRN_SUCCESS;
  }

  bool get_key_optimizable =
    (!grn_obj_is_patricia_trie(ctx, src_table) ||
     !grn_pat_is_key_encoded(ctx, (grn_pat *)src_table));
  grn_obj key_buffer;
  GRN_VOID_INIT(&key_buffer);
  uint32_t key_size;
  const char *key;
  if (get_key_optimizable) {
    key =
      _grn_table_key(ctx, src_table, GRN_RECORD_VALUE(caster->src), &key_size);
  } else {
    grn_table_get_key2(ctx,
                       src_table,
                       GRN_RECORD_VALUE(caster->src),
                       &key_buffer);
    key = GRN_BULK_HEAD(&key_buffer);
    key_size = GRN_BULK_VSIZE(&key_buffer);
  }

  grn_id dest_id;
  uint32_t missing_mode = (caster->flags & GRN_OBJ_MISSING_MASK);
  if (missing_mode == GRN_OBJ_MISSING_ADD) {
    dest_id = grn_table_add(ctx, dest_table, key, key_size, NULL);
  } else {
    dest_id = grn_table_get(ctx, dest_table, key, key_size);
  }
  GRN_OBJ_FIN(ctx, &key_buffer);

  if (dest_id == GRN_ID_NIL) {
    if ((caster->flags & GRN_OBJ_INVALID_MASK) == GRN_OBJ_INVALID_ERROR) {
      return GRN_INVALID_ARGUMENT;
    }
    if (missing_mode == GRN_OBJ_MISSING_IGNORE) {
      return GRN_SUCCESS;
    }
  }
  if (grn_obj_is_uvector(ctx, caster->dest)) {
    grn_uvector_add_element_record(ctx, caster->dest, dest_id, 0.0);
  } else {
    GRN_RECORD_PUT(ctx, caster->dest, dest_id);
  }
  return GRN_SUCCESS;
}

static grn_rc
grn_caster_cast_record(grn_ctx *ctx, grn_caster *caster)
{
  grn_rc rc = GRN_FUNCTION_NOT_IMPLEMENTED;
  grn_obj *src_table = NULL;
  grn_obj *dest_table = NULL;

  if (caster->src->header.domain == caster->dest->header.domain) {
    if (grn_obj_is_uvector(ctx, caster->dest)) {
      if (grn_obj_is_uvector(ctx, caster->src)) {
        uint32_t i;
        uint32_t n_elements = grn_uvector_size(ctx, caster->src);
        for (i = 0; i < n_elements; i++) {
          float weight;
          grn_id id =
            grn_uvector_get_element_record(ctx, caster->src, i, &weight);
          grn_uvector_add_element_record(ctx, caster->dest, id, weight);
        }
      } else {
        grn_uvector_add_element_record(ctx,
                                       caster->dest,
                                       GRN_RECORD_VALUE(caster->src),
                                       0.0);
      }
    } else {
      GRN_RECORD_PUT(ctx, caster->dest, GRN_RECORD_VALUE(caster->src));
    }
    rc = GRN_SUCCESS;
    goto exit;
  }

  src_table = grn_ctx_at(ctx, caster->src->header.domain);
  if (!src_table) {
    rc = GRN_INVALID_ARGUMENT;
    goto exit;
  }
  if (src_table->header.type == GRN_TABLE_NO_KEY) {
    rc = GRN_INVALID_ARGUMENT;
    goto exit;
  }

  if (grn_type_id_is_builtin(ctx, caster->dest->header.domain)) {
    rc = grn_caster_cast_record_data(ctx, caster, src_table);
  } else {
    dest_table = grn_ctx_at(ctx, caster->dest->header.domain);
    if (!dest_table) {
      rc = GRN_INVALID_ARGUMENT;
      goto exit;
    }
    if (!grn_obj_is_table_with_key(ctx, dest_table)) {
      rc = GRN_INVALID_ARGUMENT;
      goto exit;
    }

    rc = grn_caster_cast_record_record(ctx, caster, src_table, dest_table);
  }

exit:
  grn_obj_unref(ctx, src_table);
  grn_obj_unref(ctx, dest_table);

  return rc;
}

extern "C" grn_rc
grn_caster_cast_text_to_uvector(grn_ctx *ctx, grn_caster *caster)
{
  grn_rc rc = GRN_INVALID_ARGUMENT;
#if defined(GRN_WITH_RAPIDJSON) || defined(GRN_WITH_SIMDJSON)
  rc = cast_text_to_uvector(ctx, caster);
  if (rc == GRN_SUCCESS) {
    return rc;
  }
#endif

  auto domain_id = caster->dest->header.domain;
  grn_obj dest;
  GRN_VALUE_FIX_SIZE_INIT(&dest, 0, domain_id);
  grn_caster sub_caster = {
    caster->src,
    &dest,
    caster->flags,
    caster->target,
  };
  rc = grn_caster_cast(ctx, &sub_caster);
  if (rc == GRN_SUCCESS) {
    if (GRN_BULK_VSIZE(&dest) > 0) {
      grn_bulk_write(ctx,
                     caster->dest,
                     GRN_BULK_HEAD(&dest),
                     GRN_BULK_VSIZE(&dest));
      if (grn_obj_is_weight_uvector(ctx, caster->dest)) {
        GRN_FLOAT32_PUT(ctx, caster->dest, 0.0);
      }
    }
  }
  GRN_OBJ_FIN(ctx, &dest);
  return rc;
}

extern "C" grn_rc
grn_caster_cast_text_to_text_vector(grn_ctx *ctx, grn_caster *caster)
{
#if defined(GRN_WITH_RAPIDJSON) || defined(GRN_WITH_SIMDJSON)
  return cast_text_to_text_vector(ctx, caster);
#else
  return GRN_INVALID_ARGUMENT;
#endif
}

extern "C" grn_rc
grn_caster_cast(grn_ctx *ctx, grn_caster *caster)
{
  grn_rc rc = GRN_SUCCESS;
  switch (caster->src->header.domain) {
  case GRN_DB_BOOL:
    rc = grn_caster_cast_bool(ctx, caster);
    break;
  case GRN_DB_INT8:
    rc = num2dest<int8_t>(ctx, caster);
    break;
  case GRN_DB_UINT8:
    rc = num2dest<uint8_t>(ctx, caster);
    break;
  case GRN_DB_INT16:
    rc = num2dest<int16_t>(ctx, caster);
    break;
  case GRN_DB_UINT16:
    rc = num2dest<uint16_t>(ctx, caster);
    break;
  case GRN_DB_INT32:
    rc = num2dest<int32_t>(ctx, caster);
    break;
  case GRN_DB_UINT32:
    rc = num2dest<uint32_t>(ctx, caster);
    break;
  case GRN_DB_INT64:
    rc = num2dest<int64_t>(ctx, caster);
    break;
  case GRN_DB_UINT64:
    rc = num2dest<uint64_t>(ctx, caster);
    break;
  case GRN_DB_FLOAT32:
    rc = num2dest<float>(ctx, caster);
    break;
  case GRN_DB_FLOAT:
    rc = num2dest<double>(ctx, caster);
    break;
  case GRN_DB_TIME:
    rc = num2dest<int64_t>(ctx, caster);
    break;
  case GRN_DB_SHORT_TEXT:
  case GRN_DB_TEXT:
  case GRN_DB_LONG_TEXT:
    rc = grn_caster_cast_text(ctx, caster);
    break;
  case GRN_DB_TOKYO_GEO_POINT:
  case GRN_DB_WGS84_GEO_POINT:
    if (caster->src->header.domain == caster->dest->header.domain) {
      GRN_TEXT_PUT(ctx,
                   caster->dest,
                   GRN_TEXT_VALUE(caster->src),
                   GRN_TEXT_LEN(caster->src));
    } else {
      int latitude, longitude;
      double latitude_in_degree, longitude_in_degree;
      GRN_GEO_POINT_VALUE(caster->src, latitude, longitude);
      latitude_in_degree = GRN_GEO_MSEC2DEGREE(latitude);
      longitude_in_degree = GRN_GEO_MSEC2DEGREE(longitude);
      /* TokyoGeoPoint <-> WGS84GeoPoint is based on
         http://www.jalan.net/jw/jwp0200/jww0203.do

         jx: longitude in degree in Tokyo Geodetic System.
         jy: latitude in degree in Tokyo Geodetic System.
         wx: longitude in degree in WGS 84.
         wy: latitude in degree in WGS 84.

         jy = wy * 1.000106961 - wx * 0.000017467 - 0.004602017
         jx = wx * 1.000083049 + wy * 0.000046047 - 0.010041046

         wy = jy - jy * 0.00010695 + jx * 0.000017464 + 0.0046017
         wx = jx - jy * 0.000046038 - jx * 0.000083043 + 0.010040
      */
      if (caster->dest->header.domain == GRN_DB_TOKYO_GEO_POINT) {
        double wgs84_latitude_in_degree = latitude_in_degree;
        double wgs84_longitude_in_degree = longitude_in_degree;
        int tokyo_latitude, tokyo_longitude;
        double tokyo_latitude_in_degree, tokyo_longitude_in_degree;
        tokyo_latitude_in_degree = wgs84_latitude_in_degree * 1.000106961 -
                                   wgs84_longitude_in_degree * 0.000017467 -
                                   0.004602017;
        tokyo_longitude_in_degree = wgs84_longitude_in_degree * 1.000083049 +
                                    wgs84_latitude_in_degree * 0.000046047 -
                                    0.010041046;
        tokyo_latitude = GRN_GEO_DEGREE2MSEC(tokyo_latitude_in_degree);
        tokyo_longitude = GRN_GEO_DEGREE2MSEC(tokyo_longitude_in_degree);
        GRN_GEO_POINT_SET(ctx, caster->dest, tokyo_latitude, tokyo_longitude);
      } else {
        double tokyo_latitude_in_degree = latitude_in_degree;
        double tokyo_longitude_in_degree = longitude_in_degree;
        int wgs84_latitude, wgs84_longitude;
        double wgs84_latitude_in_degree, wgs84_longitude_in_degree;
        wgs84_latitude_in_degree =
          tokyo_latitude_in_degree - tokyo_latitude_in_degree * 0.00010695 +
          tokyo_longitude_in_degree * 0.000017464 + 0.0046017;
        wgs84_longitude_in_degree =
          tokyo_longitude_in_degree - tokyo_latitude_in_degree * 0.000046038 -
          tokyo_longitude_in_degree * 0.000083043 + 0.010040;
        wgs84_latitude = GRN_GEO_DEGREE2MSEC(wgs84_latitude_in_degree);
        wgs84_longitude = GRN_GEO_DEGREE2MSEC(wgs84_longitude_in_degree);
        GRN_GEO_POINT_SET(ctx, caster->dest, wgs84_latitude, wgs84_longitude);
      }
    }
    break;
  case GRN_VOID:
    rc = grn_obj_reinit(ctx,
                        caster->dest,
                        caster->dest->header.domain,
                        caster->dest->header.flags);
    break;
  default:
    if (caster->src->header.domain >= GRN_N_RESERVED_TYPES) {
      grn_obj *table;
      table = grn_ctx_at(ctx, caster->src->header.domain);
      switch (table->header.type) {
      case GRN_TABLE_HASH_KEY:
      case GRN_TABLE_PAT_KEY:
      case GRN_TABLE_DAT_KEY:
      case GRN_TABLE_NO_KEY:
        rc = grn_caster_cast_record(ctx, caster);
        break;
      default:
        rc = GRN_FUNCTION_NOT_IMPLEMENTED;
        break;
      }
    } else {
      rc = GRN_FUNCTION_NOT_IMPLEMENTED;
    }
    break;
  }
  return rc;
}

extern "C" grn_rc
grn_obj_cast(grn_ctx *ctx,
             grn_obj *src,
             grn_obj *dest,
             bool add_record_if_not_exist)
{
  uint32_t flags = 0;
  if (add_record_if_not_exist) {
    flags |= GRN_OBJ_MISSING_ADD | GRN_OBJ_INVALID_ERROR;
  } else {
    flags |= GRN_OBJ_MISSING_NIL | GRN_OBJ_INVALID_ERROR;
  }
  grn_caster caster = {
    src,
    dest,
    flags,
    NULL,
  };
  return grn_caster_cast(ctx, &caster);
}
