com.github.rinde.rinsim.core.pdptw.RandomVehicle.java Source code

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Here is the source code for com.github.rinde.rinsim.core.pdptw.RandomVehicle.java

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/*
 * Copyright (C) 2011-2015 Rinde van Lon, iMinds-DistriNet, KU Leuven
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.github.rinde.rinsim.core.pdptw;

import static com.google.common.collect.Lists.newArrayList;

import java.util.Collection;
import java.util.Set;

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

import com.github.rinde.rinsim.core.TimeLapse;
import com.github.rinde.rinsim.core.model.pdp.PDPModel;
import com.github.rinde.rinsim.core.model.pdp.PDPModel.ParcelState;
import com.github.rinde.rinsim.core.model.pdp.Parcel;
import com.github.rinde.rinsim.core.model.road.RoadModel;
import com.google.common.base.Optional;
import com.google.common.collect.ImmutableSet;

public class RandomVehicle extends DefaultVehicle {
    private Optional<RoadModel> rm;
    private Optional<PDPModel> pm;
    private final RandomGenerator rng;
    private Optional<Parcel> target;

    public RandomVehicle(VehicleDTO dto, long seed) {
        super(dto);
        rng = new MersenneTwister(seed);
        rm = Optional.absent();
        pm = Optional.absent();
        target = Optional.absent();
    }

    @Override
    protected void tickImpl(TimeLapse time) {
        if (!time.hasTimeLeft()) {
            return;
        }
        if (!target.isPresent()) {
            target = findTarget();
        }

        if (target.isPresent()) {
            if (pm.get().containerContains(this, target.get())) {
                if (rm.get().getPosition(this).equals(target.get().getDestination())) {
                    pm.get().deliver(this, target.get(), time);
                } else {
                    rm.get().moveTo(this, target.get().getDestination(), time);
                }
            } else {
                if (pm.get().getParcelState(target.get()) != ParcelState.AVAILABLE) {
                    // somebody got there first
                    target = Optional.absent();
                } else if (rm.get().equalPosition(this, target.get())) {
                    pm.get().pickup(this, target.get(), time);
                } else {
                    rm.get().moveTo(this, target.get(), time);
                }
            }
        } else {
            final Set<DefaultDepot> depots = rm.get().getObjectsOfType(DefaultDepot.class);
            if (!depots.isEmpty()) {
                rm.get().moveTo(this, depots.iterator().next(), time);
            }
        }
    }

    Optional<Parcel> findTarget() {
        final Collection<Parcel> available = pm.get().getParcels(ParcelState.AVAILABLE);
        final ImmutableSet<Parcel> contents = pm.get().getContents(this);
        if (available.isEmpty() && contents.isEmpty()) {
            return Optional.absent();
        }
        boolean pickup;
        if (!available.isEmpty() && !contents.isEmpty()) {
            pickup = rng.nextBoolean();
        } else {
            pickup = !available.isEmpty();
        }
        if (pickup) {
            return Optional.of(newArrayList(available).get(rng.nextInt(available.size())));
        } else {
            return Optional.of(contents.asList().get(rng.nextInt(contents.size())));
        }
    }

    @Override
    public void initRoadPDP(RoadModel pRoadModel, PDPModel pPdpModel) {
        rm = Optional.of(pRoadModel);
        pm = Optional.of(pPdpModel);
    }
}