edu.oregonstate.eecs.mcplan.sim.OptionRunner.java Source code

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Here is the source code for edu.oregonstate.eecs.mcplan.sim.OptionRunner.java

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/* LICENSE
Copyright (c) 2013-2016, Jesse Hostetler (jessehostetler@gmail.com)
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 ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (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 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

/**
 * 
 */
package edu.oregonstate.eecs.mcplan.sim;

import java.util.ArrayList;
import java.util.Collections;

import org.apache.commons.math3.random.MersenneTwister;
import org.apache.commons.math3.random.RandomGenerator;

import edu.oregonstate.eecs.mcplan.Option;
import edu.oregonstate.eecs.mcplan.Policy;
import edu.oregonstate.eecs.mcplan.UndoableAction;

/**
 * @author jhostetler
 *
 */
public class OptionRunner<S, A extends UndoableAction<S>> {
    private final SimultaneousMoveSimulator<S, A> sim_;
    private final ArrayList<Policy<S, Option<S, A>>> policies_;
    private final int T_;

    private final ArrayList<Option<S, A>> active_;
    // TODO: seed
    private final RandomGenerator rng_ = new MersenneTwister();
    private final ArrayList<OptionListener<S, A>> listeners_ = new ArrayList<OptionListener<S, A>>();

    public OptionRunner(final SimultaneousMoveSimulator<S, A> sim,
            final ArrayList<Policy<S, Option<S, A>>> policies, final int T) {
        sim_ = sim;
        policies_ = policies;
        T_ = T;
        active_ = new ArrayList<Option<S, A>>(sim_.nagents());
        Collections.fill(active_, null);
    }

    public boolean terminate(final S s, final Option<S, A> o) {
        final double beta = o.terminate(s);
        if (beta == 1.0) {
            return true;
        } else if (beta == 0.0) {
            return false;
        } else {
            return rng_.nextDouble() < beta;
        }
    }

    public void run() {
        final S s0 = sim_.state();
        for (int i = 0; i < policies_.size(); ++i) {
            final Policy<S, Option<S, A>> pi = policies_.get(i);
            pi.setState(s0, 0L);
            final Option<S, A> o = pi.getAction();
            active_.set(i, o);
            o.start(s0);
            fireOptionInitiated(s0, i, o);
        }
        fireStartState(s0);
        for (int t = 0; t < T_; ++t) {
            final ArrayList<A> actions = new ArrayList<A>(policies_.size());
            for (int i = 0; i < policies_.size(); ++i) {
                final S s = sim_.state();
                Option<S, A> option = active_.get(i);
                if (terminate(s, option)) {
                    // TODO: How to split 'control' up between option choice
                    // and action choice?
                    fireOptionTerminated(s, i, option);
                    option = policies_.get(i).getAction();
                    option.start(s);
                    fireOptionInitiated(s, i, option);
                }
                final Policy<S, A> policy = option.pi;
                System.out.println("[SimultaneousMoveRunner] Action selection: setTurn( " + i + " )");
                sim_.setTurn(i);
                policy.setState(s, t);
                firePreGetAction(i);
                final A a = policy.getAction();
                firePostGetAction(i, a);
                actions.add(a);
                System.out.println("!!! [t = " + t + "] a" + i + " = " + a.toString());
            }
            System.out.println("[SimultaneousMoveRunner] Execution: setTurn( 0 )");
            sim_.setTurn(0);
            for (final A a : actions) {
                sim_.takeAction(a);
            }
            fireActionsTaken(sim_.state());
            if (sim_.isTerminalState()) {
                break;
            }
        }
        fireEndState(sim_.state());
    }

    public void addListener(final OptionListener<S, A> listener) {
        listeners_.add(listener);
    }

    private void fireStartState(final S s) {
        final ArrayList<Policy<S, A>> Pi = new ArrayList<Policy<S, A>>();
        for (final Option<S, A> o : active_) {
            Pi.add(o.pi);
        }
        for (final OptionListener<S, A> listener : listeners_) {
            listener.startState(s, Pi);
        }
    }

    private void firePreGetAction(final int i) {
        for (final OptionListener<S, A> listener : listeners_) {
            listener.preGetAction(i);
        }
    }

    private void fireOptionTerminated(final S s, final int i, final Option<S, A> o) {
        for (final OptionListener<S, A> listener : listeners_) {
            listener.optionTerminated(s, i, o);
        }
    }

    private void fireOptionInitiated(final S s, final int i, final Option<S, A> o) {
        for (final OptionListener<S, A> listener : listeners_) {
            listener.optionInitiated(s, i, o);
        }
    }

    private void firePostGetAction(final int i, final UndoableAction<S> a) {
        for (final OptionListener<S, A> listener : listeners_) {
            listener.postGetAction(i, a);
        }
    }

    private void fireActionsTaken(final S sprime) {
        for (final OptionListener<S, A> listener : listeners_) {
            listener.onActionsTaken(sprime);
        }
    }

    private void fireEndState(final S s) {
        for (final OptionListener<S, A> listener : listeners_) {
            listener.endState(s);
        }
    }
}