MultitaskCompositeMachine.h

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/*
 * This program 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.
 *
 * Copyright (C) 2012 Sergey Lisitsyn
 */

#ifndef  MULTITASKCOMPOSITEMACHINE_H_
#define  MULTITASKCOMPOSITEMACHINE_H_

#include <shogun/lib/config.h>
#include <shogun/machine/Machine.h>
#include <shogun/features/DotFeatures.h>
#include <shogun/transfer/multitask/TaskRelation.h>
#include <shogun/transfer/multitask/TaskGroup.h>
#include <shogun/transfer/multitask/TaskTree.h>
#include <shogun/transfer/multitask/Task.h>

#include <vector>
#include <set>

using namespace std;

namespace shogun
{
class CMultitaskCompositeMachine : public CMachine
{

    public:
        MACHINE_PROBLEM_TYPE(PT_BINARY)

        
        CMultitaskCompositeMachine();

        CMultitaskCompositeMachine(
             CMachine* machine, CFeatures* training_data, 
             CLabels* training_labels, CTaskGroup* task_group);

        virtual ~CMultitaskCompositeMachine();

        virtual const char* get_name() const 
        {
            return "MultitaskCompositeMachine";
        }

        int32_t get_current_task() const;

        void set_current_task(int32_t task);

        CTaskGroup* get_task_group() const;

        void set_task_group(CTaskGroup* task_group);

        virtual bool supports_locking() const { return true; }

        virtual void post_lock(CLabels* labels, CFeatures* features);

        virtual bool train_locked(SGVector<index_t> indices);

        virtual CBinaryLabels* apply_locked_binary(SGVector<index_t> indices);

        virtual void set_features(CFeatures* features)
        {
            SG_REF(features);
            SG_UNREF(m_features);
            m_features = features;
        }

        virtual CFeatures* get_features() const
        { 
            SG_REF(m_features);
            return m_features;
        }
        
        virtual void set_machine(CMachine* machine)
        {
            SG_REF(machine);
            SG_UNREF(m_machine);
            m_machine = machine;
        }

        virtual CMachine* get_machine() const
        { 
            SG_REF(m_machine);
            return m_machine;
        }

        virtual float64_t apply_one(int32_t vec_idx);

    protected:

        virtual bool train_machine(CFeatures* data=NULL);

    private:

        void register_parameters();

    protected:

        CMachine* m_machine;

        CFeatures* m_features;

        int32_t m_current_task;

        CTaskGroup* m_task_group;

        CDynamicObjectArray* m_task_machines;

        vector< set<index_t> > m_tasks_indices;

};
}
#endif