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// -*- c++ -*-
#pragma once
#include <boost/smart_ptr/shared_ptr.hpp>
#include "moses/ThreadPool.h"
#include "moses/Manager.h"
#include "moses/HypergraphOutput.h"
#include "moses/IOWrapper.h"
#include "moses/Manager.h"
#include "moses/ChartManager.h"
#include "moses/Syntax/F2S/Manager.h"
#include "moses/Syntax/S2T/Manager.h"
#include "moses/Syntax/T2S/Manager.h"
#include <boost/shared_ptr.hpp>
#include <boost/weak_ptr.hpp>
#include <boost/make_shared.hpp>
namespace Moses
{
class InputType;
class OutputCollector;
/** Translates a sentence.
* - calls the search (Manager)
* - applies the decision rule
* - outputs best translation and additional reporting
**/
class TranslationTask : public Moses::Task
{
// no copying, no assignment
TranslationTask(TranslationTask const& other) { }
TranslationTask const&
operator=(TranslationTask const& other) { return *this; }
protected:
boost::weak_ptr<TranslationTask> m_self; // weak ptr to myself
TranslationTask() { } ;
TranslationTask(boost::shared_ptr<Moses::InputType> const& source,
boost::shared_ptr<Moses::IOWrapper> const& ioWrapper);
// Yes, the constructor is protected.
//
// TranslationTasks can only be created through the creator
// functions create(...). The creator functions set m_self to a
// weak_pointer s.t m_self.get() == this. The public member function
// self() can then be used to get a shared_ptr to the Task that
// guarantees the existence of the Task while that pointer is live.
// Depending on the use, case, that shared pointer can be kept alive
// or copied into a weak pointer that can then be used e.g. as a
// hash key for caching context-dependent information in feature
// functions. When it is time to clean up the cache, the feature
// function can determine (via a check on the weak pointer) if the
// task is still live or not, or maintain a shared_ptr to ensure the
// task stays alive till it's done with it.
public:
virtual
boost::shared_ptr<TranslationTask>
self() { return m_self.lock(); }
virtual
boost::shared_ptr<TranslationTask const>
self() const { return m_self.lock(); }
// creator functions
static boost::shared_ptr<TranslationTask> create();
static boost::shared_ptr<TranslationTask>
create(boost::shared_ptr<Moses::InputType> const& source,
boost::shared_ptr<Moses::IOWrapper> const& ioWrapper);
~TranslationTask();
/** Translate one sentence
* gets called by main function implemented at end of this source file */
virtual void Run();
private:
boost::shared_ptr<Moses::InputType> m_source;
boost::shared_ptr<Moses::IOWrapper> m_ioWrapper;
};
} //namespace
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