Moderate.cpp

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/* ============================================================
 *
 * This file is a part of CCA project
 *
 * Copyright (C) 2011 by Arne Nordmann <anordman at cor-lab dot uni-bielefeld dot de>
 *
 * This file may be licensed under the terms of the
 * GNU Lesser General Public License Version 3 (the ``LGPL''),
 * or (at your option) any later version.
 *
 * Software distributed under the License is distributed
 * on an ``AS IS'' basis, WITHOUT WARRANTY OF ANY KIND, either
 * express or implied. See the LGPL for the specific language
 * governing rights and limitations.
 *
 * You should have received a copy of the LGPL along with this
 * program. If not, go to http://www.gnu.org/licenses/lgpl.html
 * or write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The development of this software was supported by:
 *   CoR-Lab, Research Institute for Cognition and Robotics
 *     Bielefeld University
 *
 * ============================================================ */

#include "Moderate.h"

#include <vector>
#include <numeric>
#include <sstream>
#include <iostream>

using namespace std;
using namespace boost;

namespace cca {

StrategyPtr Moderate::timeout(unsigned int timeout) {
    return StrategyPtr(new Moderate(timeout));
}

StrategyPtr Moderate::noTimeout() {
    return StrategyPtr(new Moderate(0));
}

Moderate::Moderate(unsigned int tout) :
        ProcessingStrategy("Moderate", true, true), ticks(0), tout(tout),
                logger(
                        rsc::logging::Logger::getLogger(
                                "cca.processing.moderate")) {

}

bool Moderate::processOnTick() const {
    RSCTRACE(logger, "Moderate::processOnTick()");
    if (this->tout > 0) {
        ++this->ticks;
        if (this->ticks == this->tout) {
            this->ticks = 0;
            RSCDEBUG(logger, "Moderate::processOnTick() yes, do process");
            return true;
        }
    }
    return false;
}

bool Moderate::processOnInputs(
        ProcessingStrategy::NamedInputPorts inputs) const {
    RSCTRACE(logger, "Moderate::processOnInputs()");
    if ((this->tout > 0) && (this->ticks >= this->tout)) {
        this->ticks = 0;
        RSCDEBUG(logger, "Moderate::processOnInputs() yes, do process");
        return true;
    }

    for (ProcessingStrategy::NamedInputPorts::const_iterator i = inputs.begin();
            i != inputs.end(); ++i) {
        if (i->second->empty() || !i->second->newItem()) {
            return false;
        } else {
            RSCTRACE(logger,
                    "Moderate::processOnInputs() New item in "+i->first);
        }
    }

    this->ticks = 0;
    RSCDEBUG(logger, "Moderate::processOnInputs() yes, do process");
    return true;
}

string Moderate::print() const {
    ostringstream outstream(ostringstream::out);
    outstream.precision(3); // Precision when printing double values
    outstream << "<" << this->name;
    if (this->tout > 0) {
        outstream << " (timeout after " << this->tout << " ticks)";
    } else {
        outstream << " (no timeout)";
    }
    outstream << ">";
    return outstream.str();
}

}