metadata.cpp

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// SPDX-License-Identifier: BSD-3-Clause

/*
 * Copyright (c) 2020, Bjarne von Horn
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * * Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 * * Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 * * Neither the name of the copyright holder nor the names of its contributors
 *   may be used to endorse or promote products derived from this software
 *   without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL BJARNE VON HORN BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
#include <warehouse_ros_sqlite/metadata.h>

#include <sqlite3.h>

#include <warehouse_ros_sqlite/impl/variant.h>
#include <warehouse_ros_sqlite/utils.h>

template <typename R>
R warehouse_ros_sqlite::Metadata::doLookup(const std::string& name) const
{
  const auto res = data_.find(name);
  if (res == data_.end())
  {
    throw std::range_error("");
  }
  return boost::apply_visitor(warehouse_ros_sqlite::NullValueVisitor<R>(), res->second);
}

void warehouse_ros_sqlite::Metadata::append(const std::string& name, const std::string& val)
{
  data_[name] = val;
}
void warehouse_ros_sqlite::Metadata::append(const std::string& name, const double val)
{
  data_[name] = val;
}
void warehouse_ros_sqlite::Metadata::append(const std::string& name, const int val)
{
  data_[name] = val;
}
void warehouse_ros_sqlite::Metadata::append(const std::string& name, const bool val)
{
  data_[name] = static_cast<int>(val);
}
std::string warehouse_ros_sqlite::Metadata::lookupString(const std::string& name) const
{
  return doLookup<std::string>(name);
}
double warehouse_ros_sqlite::Metadata::lookupDouble(const std::string& name) const
{
  return doLookup<double>(name);
}
int warehouse_ros_sqlite::Metadata::lookupInt(const std::string& name) const
{
  return doLookup<int>(name);
}
bool warehouse_ros_sqlite::Metadata::lookupBool(const std::string& name) const
{
  return static_cast<bool>(doLookup<int>(name));
}
bool warehouse_ros_sqlite::Metadata::lookupField(const std::string& name) const
{
  return (data_.find(name) != data_.end());
}
std::set<std::string> warehouse_ros_sqlite::Metadata::lookupFieldNames() const
{
  std::set<std::string> ans;
  std::transform(data_.begin(), data_.end(), std::inserter(ans, ans.end()), [](const auto& it) { return it.first; });
  return ans;
}

void warehouse_ros_sqlite::Metadata::append(const std::string& name, sqlite3_stmt* stmt, int col)
{
  switch (sqlite3_column_type(stmt, col))
  {
    case SQLITE_NULL:
      data_[name] = NullValue();
      break;
    case SQLITE_BLOB:
      data_[name] =
          std::string(reinterpret_cast<const char*>(sqlite3_column_blob(stmt, col)), sqlite3_column_bytes(stmt, col));
      break;
    case SQLITE_INTEGER:
      data_[name] = sqlite3_column_int(stmt, col);
      break;
    case SQLITE_FLOAT:
      data_[name] = sqlite3_column_double(stmt, col);
      break;
    default:
      throw DatatypeMismatch("Unknown Datatype when reading Metadata from DB");
  }
}

void warehouse_ros_sqlite::Metadata::ensureColumns(sqlite3* db, const std::string& unescaped_table_name) const
{
  warehouse_ros_sqlite::EnsureColumnVisitor visitor(db, unescaped_table_name);
  for (const auto& kv : data_)
  {
    boost::apply_visitor(visitor.setColumnName(std::get<0>(kv)), std::get<1>(kv));
  }
}