DeclareBuilder.h

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/***************************************************************************
 *
 * Copyright (C) 2009 Cassio Neri Moreira
 *
 * This file is part of the KeyValue library.
 *
 * The KeyValue library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as published
 * by the Free Software Foundation, either version 3 of the License, or (at
 * your option) any later version.
 *
 * The KeyValue 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 General
 * Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with KeyValue. If not, see <http://www.gnu.org/licenses/>.
 *
 * If you modify this library, or any covered work, by linking or combining
 * it with Excel (or a modified version of that program), containing parts
 * covered by the terms of End-User License Agreement for Microsoft
 * Software, the licensors of KeyValue grant you additional permission to
 * convey the resulting work.
 *
 **************************************************************************/

#ifndef OBJECT_TYPE
  #error "Please, #define OBJECT_TYPE before including DeclareBuilder.h."
#endif

#ifndef TAG
  #error "Please, #define TAG before including DeclareBuilder.h."
#endif

#if defined(BUILDS_FROM_BOOL) || defined(BUILDS_FROM_DOUBLE) || \
  defined(BUILDS_FROM_PTIME) || defined(BUILDS_FROM_STRING)
  #define BUILDS_FROM_VARIANT
#endif

namespace tag {
class TAG;
}

template<>
class Builder<OBJECT_TYPE> :

  #ifdef COMMAND
    public Command
  #else
    public Processor
  #endif

  #ifdef BUILDS_FROM_BOOL
  , public BuilderFrom<OBJECT_TYPE, bool>
  #endif

  #ifdef BUILDS_FROM_DOUBLE
  , public BuilderFrom<OBJECT_TYPE, double>
  #endif

  #ifdef BUILDS_FROM_PTIME
  , public BuilderFrom<OBJECT_TYPE, ptime>
  #endif

  #ifdef BUILDS_FROM_STRING
  , public BuilderFrom<OBJECT_TYPE, string>
  #endif

  #ifdef BUILDS_FROM_VARIANT
  , public BuilderFromVariant
  #endif

  {

public:

  const char*
  getName() const;

  #ifdef KV_COMMAND
    const char*
    getCommandName() const;
  #endif

  #ifdef BUILDS_FROM_BOOL
    shared_ptr<OBJECT_TYPE>
    getObject(const bool& data) const;
  #endif

  #ifdef BUILDS_FROM_DOUBLE
    shared_ptr<OBJECT_TYPE>
    getObject(const double& data) const;
  #endif

  #ifdef BUILDS_FROM_PTIME
    shared_ptr<OBJECT_TYPE>
    getObject(const ptime& data) const;
  #endif

  #ifdef BUILDS_FROM_STRING
    shared_ptr<OBJECT_TYPE>
    getObject(const string& data) const;
  #endif

  value::Result
  getResult(const DataSet& data) const;

  shared_ptr<OBJECT_TYPE>
  getObject(const DataSet& data) const;

private:

  friend class ProcessorInstantiator<tag::TAG> ;

  Builder();

}; // class Builder

/*--------------------------------------------------------------------------
 * ProcessorInstantiator::getInstance()
 *------------------------------------------------------------------------*/

template<>
Processor&
ProcessorInstantiator<tag::TAG>::getInstance() {
  static Builder<OBJECT_TYPE> singleton;
  return singleton;
}

template<>
Processor&
ProcessorInstantiator<OBJECT_TYPE>::getInstance() {
  return ProcessorInstantiator<tag::TAG>::getInstance();
}

/*--------------------------------------------------------------------------
 * Builder::getResult()
 *------------------------------------------------------------------------*/

value::Result Builder<OBJECT_TYPE>::getResult(const DataSet& data) const {
  return getObject(data);
}

/*--------------------------------------------------------------------------
 * Builder::Builder()
 *------------------------------------------------------------------------*/

Builder<OBJECT_TYPE>::Builder() {
  util::Global<ProcessorMngr>::get()->add(this);
}

/*--------------------------------------------------------------------------
 * Macro clean-up
 *------------------------------------------------------------------------*/

#undef OBJECT_TYPE
#undef TAG

#ifdef COMMAND
#undef COMMAND
#endif

#ifdef BUILDS_FROM_BOOL
#undef BUILDS_FROM_BOOL
#endif

#ifdef BUILDS_FROM_DOUBLE
#undef BUILDS_FROM_DOUBLE
#endif

#ifdef BUILDS_FROM_PTIME
#undef BUILDS_FROM_PTIME
#endif

#ifdef BUILDS_FROM_STRING
#undef BUILDS_FROM_STRING
#endif

#ifdef BUILDS_FROM_VARIANT
#undef BUILDS_FROM_VARIANT
#endif