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Extractor.cpp

//
// Extractor.cpp
//
// $Id: //poco/1.3/Data/SQLite/src/Extractor.cpp#2 $
//
// Library: SQLite
// Package: SQLite
// Module:  Extractor
//
// Copyright (c) 2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// Permission is hereby granted, free of charge, to any person or organization
// obtaining a copy of the software and accompanying documentation covered by
// this license (the "Software") to use, reproduce, display, distribute,
// execute, and transmit the Software, and to prepare derivative works of the
// Software, and to permit third-parties to whom the Software is furnished to
// do so, all subject to the following:
// 
// The copyright notices in the Software and this entire statement, including
// the above license grant, this restriction and the following disclaimer,
// must be included in all copies of the Software, in whole or in part, and
// all derivative works of the Software, unless such copies or derivative
// works are solely in the form of machine-executable object code generated by
// a source language processor.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//


#include "Poco/Data/SQLite/Extractor.h"
#include "Poco/Data/SQLite/Utility.h"
#include "Poco/Data/BLOB.h"
#include "Poco/Data/DataException.h"
#include "Poco/Exception.h"
#include "sqlite3.h"
#include <cstdlib>


namespace Poco {
namespace Data {
namespace SQLite {


Extractor::Extractor(sqlite3_stmt* pStmt):
      _pStmt(pStmt)
{
}


00057 Extractor::~Extractor()
{
}


00062 bool Extractor::extract(std::size_t pos, Poco::Int32& val)
{
      if (isNull(pos))
            return false;
      val = sqlite3_column_int(_pStmt, (int) pos);
      return true;
}


00071 bool Extractor::extract(std::size_t pos, Poco::Int64& val)
{
      if (isNull(pos))
            return false;
      val = sqlite3_column_int64(_pStmt, (int) pos);
      return true;
}


00080 bool Extractor::extract(std::size_t pos, double& val)
{
      if (isNull(pos))
            return false;
      val = sqlite3_column_double(_pStmt, (int) pos);
      return true;
}


00089 bool Extractor::extract(std::size_t pos, std::string& val)
{
      if (isNull(pos))
            return false;
      const char *pBuf = reinterpret_cast<const char*>(sqlite3_column_text(_pStmt, (int) pos));
      if (!pBuf)
            val.clear();
      else
            val = std::string(pBuf);
      return true;
}


00102 bool Extractor::extract(std::size_t pos, Poco::Data::BLOB& val)
{
      if (isNull(pos))
            return false;
      int size = sqlite3_column_bytes(_pStmt, (int) pos);
      const char* pTmp = reinterpret_cast<const char*>(sqlite3_column_blob(_pStmt, (int) pos));
      val = Poco::Data::BLOB(pTmp, size);
      return true;
}


00113 bool Extractor::extract(std::size_t pos, Poco::Int8& val)
{
      if (isNull(pos))
            return false;
      val = sqlite3_column_int(_pStmt, (int) pos);
      return true;
}


00122 bool Extractor::extract(std::size_t pos, Poco::UInt8& val)
{
      if (isNull(pos))
            return false;
      val = sqlite3_column_int(_pStmt, (int) pos);
      return true;
}


00131 bool Extractor::extract(std::size_t pos, Poco::Int16& val)
{
      if (isNull(pos))
            return false;
      val = sqlite3_column_int(_pStmt, (int) pos);
      return true;
}


00140 bool Extractor::extract(std::size_t pos, Poco::UInt16& val)
{
      if (isNull(pos))
            return false;
      val = sqlite3_column_int(_pStmt, (int) pos);
      return true;
}


00149 bool Extractor::extract(std::size_t pos, Poco::UInt32& val)
{
      if (isNull(pos))
            return false;
      val = sqlite3_column_int(_pStmt, (int) pos);
      return true;
}


00158 bool Extractor::extract(std::size_t pos, Poco::UInt64& val)
{
      if (isNull(pos))
            return false;
      val = sqlite3_column_int64(_pStmt, (int) pos);
      return true;
}


00167 bool Extractor::extract(std::size_t pos, bool& val)
{
      if (isNull(pos))
            return false;
      val = (0 != sqlite3_column_int(_pStmt, (int) pos));
      return true;
}


00176 bool Extractor::extract(std::size_t pos, float& val)
{
      if (isNull(pos))
            return false;
      val = static_cast<float>(sqlite3_column_double(_pStmt, (int) pos));
      return true;
}


00185 bool Extractor::extract(std::size_t pos, char& val)
{
      if (isNull(pos)) return false;
      val = sqlite3_column_int(_pStmt, (int) pos);
      return true;
}


00193 bool Extractor::extract(std::size_t pos, Poco::Any& val)
{
      if (isNull(pos)) return false;

      bool ret = false;

      switch (Utility::getColumnType(_pStmt, pos))
      {
      case MetaColumn::FDT_BOOL:
      {
            bool i = false;
            ret = extract(pos, i); 
            val = i;
            break;
      }
      case MetaColumn::FDT_INT8:
      {
            Poco::Int8 i = 0;
            ret = extract(pos, i); 
            val = i;
            break;
      }
      case MetaColumn::FDT_UINT8:
      {
            Poco::UInt8 i = 0;
            ret = extract(pos, i); 
            val = i;
            break;
      }
      case MetaColumn::FDT_INT16:
      {
            Poco::Int16 i = 0;
            ret = extract(pos, i); 
            val = i;
            break;
      }
      case MetaColumn::FDT_UINT16:
      {
            Poco::UInt16 i = 0;
            ret = extract(pos, i); 
            val = i;
            break;
      }
      case MetaColumn::FDT_INT32:
      {
            Poco::Int32 i = 0;
            ret = extract(pos, i); 
            val = i;
            break;
      }
      case MetaColumn::FDT_UINT32:
      {
            Poco::UInt32 i = 0;
            ret = extract(pos, i); 
            val = i;
            break;
      }
      case MetaColumn::FDT_INT64:
      {
            Poco::Int64 i = 0;
            ret = extract(pos, i); 
            val = i;
            break;
      }
      case MetaColumn::FDT_UINT64:
      {
            Poco::UInt64 i = 0;
            ret = extract(pos, i); 
            val = i;
            break;
      }
      case MetaColumn::FDT_STRING:
      {
            std::string s;
            ret = extract(pos, s); 
            val = s;
            break;
      }
      case MetaColumn::FDT_DOUBLE:
      {
            double d(0.0);
            ret = extract(pos, d); 
            val = d;
            break;
      }
      case MetaColumn::FDT_FLOAT:
      {
            float f(0.0);
            ret = extract(pos, f); 
            val = f;
            break;
      }
      case MetaColumn::FDT_BLOB:
      {
            BLOB b;
            ret = extract(pos, b); 
            val = b;
            break;
      }
      default:
            throw Poco::Data::UnknownTypeException("Unknown type during extraction");
      }

      return ret;
}


00300 bool Extractor::isNull(std::size_t pos)
{
      return sqlite3_column_type(_pStmt, (int) pos) == SQLITE_NULL;
}


} } } // namespace Poco::Data::SQLite

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