KernelSelection.cpp

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/*
 * Copyright (c) The Shogun Machine Learning Toolbox
 * Written (w) 2012-2013 Heiko Strathmann
 * Written (w) 2014 Soumyajit De
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer.
 * 2. 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.
 *
 * 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 THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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 * (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
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 */

#include <shogun/statistics/KernelSelection.h>
#include <shogun/kernel/CombinedKernel.h>
#include <shogun/statistics/KernelTwoSampleTest.h>
#include <shogun/statistics/LinearTimeMMD.h>
#include <shogun/statistics/QuadraticTimeMMD.h>

using namespace shogun;

CKernelSelection::CKernelSelection()
{
    init();
}

CKernelSelection::CKernelSelection(CKernelTwoSampleTest* estimator)
{
    init();
    set_estimator(estimator);
}

CKernelSelection::~CKernelSelection()
{
    SG_UNREF(m_estimator);
}

void CKernelSelection::init()
{
    SG_ADD((CSGObject**)&m_estimator, "estimator",
            "Underlying CKernelTwoSampleTest instance", MS_NOT_AVAILABLE);

    m_estimator=NULL;
}

void CKernelSelection::set_estimator(CKernelTwoSampleTest* estimator)
{
    REQUIRE(estimator, "No CKernelTwoSampleTest instance provided!\n");

    /* ensure that there is a combined kernel */
    CKernel* kernel=estimator->get_kernel();
    REQUIRE(kernel, "Underlying \"%s\" has no kernel set!\n",
            estimator->get_name());
    REQUIRE(kernel->get_kernel_type()==K_COMBINED, "Kernel of underlying \"%s\" "
            "is of type \"%s\" but is has to be CCombinedKernel\n",
            estimator->get_name(), kernel->get_name());
    SG_UNREF(kernel);

    SG_REF(estimator);
    SG_UNREF(m_estimator);
    m_estimator=estimator;
}

CKernelTwoSampleTest* CKernelSelection::get_estimator() const
{
    SG_REF(m_estimator);
    return m_estimator;
}