Merge remote-tracking branch 'simonstrator/tm/vehicular-services'

src/de/tud/kom/p2psim/impl/vehicular/DefaultVehicleInformationComponent.java

+/*
+ * Copyright (c) 2005-2010 KOM – Multimedia Communications Lab
+ *
+ * This file is part of PeerfactSim.KOM.
+ *
+ * PeerfactSim.KOM 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
+ * any later version.
+ *
+ * PeerfactSim.KOM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with PeerfactSim.KOM.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+package de.tud.kom.p2psim.impl.vehicular;
+
+import java.util.List;
+import java.util.Set;
+
+import de.tudarmstadt.maki.simonstrator.api.Host;
+import de.tudarmstadt.maki.simonstrator.api.common.graph.INodeID;
+import de.tudarmstadt.maki.simonstrator.api.component.ComponentNotAvailableException;
+import de.tudarmstadt.maki.simonstrator.api.component.sensor.route.Route;
+import de.tudarmstadt.maki.simonstrator.api.component.sis.SiSComponent;
+import de.tudarmstadt.maki.simonstrator.api.component.sis.SiSDataCallback;
+import de.tudarmstadt.maki.simonstrator.api.component.sis.SiSInfoProperties;
+import de.tudarmstadt.maki.simonstrator.api.component.sis.SiSInformationProvider.SiSProviderHandle;
+import de.tudarmstadt.maki.simonstrator.api.component.sis.exception.InformationNotAvailableException;
+import de.tudarmstadt.maki.simonstrator.api.component.sis.type.SiSTypes;
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.VehicleInformationComponent;
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.api.SimulationSetupExtractor;
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.api.VehicleController;
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.roadnetwork.RoadNetworkEdge;
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.roadnetwork.RoadNetworkRoute;
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.roadnetwork.exception.NoAdditionalRouteAvailableException;
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.roadnetwork.exception.NoExitAvailableException;
+
+public class DefaultVehicleInformationComponent implements VehicleInformationComponent {
+
+	private Host host;
+
+	private VehicleController controller;
+	private SimulationSetupExtractor extractor;
+
+	private String vehicleID;
+
+	public DefaultVehicleInformationComponent(Host host, VehicleController controller, SimulationSetupExtractor extractor, boolean pRouteKnown) {
+		this.host = host;
+
+		this.controller = controller;
+		this.extractor = extractor;
+
+		try {
+			SiSComponent siSComponent = getHost().getComponent(SiSComponent.class);
+			siSComponent.provide().nodeState(SiSTypes.ROAD_EDGE, new SiSDataCallback<RoadNetworkEdge>() {
+
+				@Override
+				public RoadNetworkEdge getValue(INodeID pNodeID,
+						SiSProviderHandle pProviderHandle)
+								throws InformationNotAvailableException {
+					if (pNodeID == getHost().getId()) {
+						if (isValid()) {
+							RoadNetworkRoute route = getCurrentRoute();
+							if (route != null) {
+								return route.getStart();
+							}
+						}
+					}
+					return null;
+				}
+
+				@Override
+				public Set<INodeID> getObservedNodes() {
+					return INodeID.getSingleIDSet(getHost().getId());
+				}
+
+				@Override
+				public SiSInfoProperties getInfoProperties() {
+					return new SiSInfoProperties();
+				}
+
+			});
+
+			siSComponent.provide().nodeState(SiSTypes.HEADING, new SiSDataCallback<Double>() {
+
+				@Override
+				public Double getValue(INodeID pNodeID,
+						SiSProviderHandle pProviderHandle)
+								throws InformationNotAvailableException {
+					if (pNodeID == getHost().getId()) {
+						if (isValid()) {
+							return controller.getVehicleHeading(vehicleID);
+						}
+					}
+					return null;
+				}
+
+				@Override
+				public Set<INodeID> getObservedNodes() {
+					return INodeID.getSingleIDSet(getHost().getId());
+				}
+
+				@Override
+				public SiSInfoProperties getInfoProperties() {
+					return new SiSInfoProperties();
+				}
+
+			});
+
+			if (pRouteKnown) {
+				siSComponent.provide().nodeState(SiSTypes.ROUTE, new SiSDataCallback<RoadNetworkRoute>() {
+
+					@Override
+					public RoadNetworkRoute getValue(INodeID pNodeID,
+							SiSProviderHandle pProviderHandle)
+									throws InformationNotAvailableException {
+						if (pNodeID == getHost().getId()) {
+							if (isValid()) {
+								return getCurrentRoute();
+							}
+						}
+						return null;
+					}
+
+					@Override
+					public Set<INodeID> getObservedNodes() {
+						return INodeID.getSingleIDSet(getHost().getId());
+					}
+
+					@Override
+					public SiSInfoProperties getInfoProperties() {
+						return new SiSInfoProperties();
+					}
+
+				});
+			}
+		} catch (ComponentNotAvailableException e) {
+			// Nothing to do!
+		}
+	}
+
+	@Override
+	public void setVehicleID(String pVehicleID) {
+		vehicleID = pVehicleID;
+	}
+
+	@Override
+	public void resetVehicleID() {
+		vehicleID = null;
+	}
+
+	@Override
+	public void initialize() {
+		// TODO Auto-generated method stub
+
+	}
+
+	@Override
+	public void shutdown() {
+		// TODO Auto-generated method stub
+
+	}
+
+	@Override
+	public Host getHost() {
+		return host;
+	}
+
+	@Override
+	public RoadNetworkRoute getCurrentRoute() {
+		return controller.getCurrentRoute(vehicleID);
+	}
+
+	@Override
+	public boolean changeCurrentRoute(RoadNetworkRoute pRoute) {
+		controller.rerouteVehicle(vehicleID, pRoute);
+		return true;
+	}
+
+	@Override
+	public RoadNetworkRoute findNewRoute() {
+		try {
+			return controller.findNewRoute(vehicleID);
+		} catch (NoAdditionalRouteAvailableException e) {
+			return null;
+		}
+	}
+
+	@Override
+	public RoadNetworkRoute findNewRoute(List<RoadNetworkEdge> pEdgesToAvoid,
+			boolean pKeepDestination) {
+		try {
+			return controller.findNewRoute(vehicleID, pEdgesToAvoid, pKeepDestination);
+		} catch (NoAdditionalRouteAvailableException
+				| NoExitAvailableException e) {
+			return null;
+		}
+	}
+
+	@Override
+	public boolean isValid() {
+		return vehicleID != null;
+	}
+
+	@Override
+	public void stopVehicle() {
+		controller.stopVehicle(vehicleID);
+	}
+
+	@Override
+	public double getCurrentSpeed() {
+		return controller.getVehicleSpeed(vehicleID);
+	}
+
+	@Override
+	public void addRouteListener(RouteListener listener) {
+		throw new UnsupportedOperationException();
+	}
+
+	@Override
+	public void removeRouteListener(RouteListener listener) {
+		throw new UnsupportedOperationException();
+	}
+
+	@Override
+	public void addRouteSegmentListener(RouteSegmentListener listener) {
+		throw new UnsupportedOperationException();
+	}
+
+	@Override
+	public void removeRouteSegmentListener(RouteSegmentListener listener) {
+		throw new UnsupportedOperationException();
+	}
+
+	@Override
+	public Route getRoute() {
+		throw new UnsupportedOperationException();
+	}
+
+}

src/de/tud/kom/p2psim/impl/vehicular/caching/DefaultCachingComponent.java

+/*
+ * Copyright (c) 2005-2010 KOM – Multimedia Communications Lab
+ *
+ * This file is part of Simonstrator.KOM.
+ *
+ * Simonstrator.KOM 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
+ * any later version.
+ *
+ * PeerfactSim.KOM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with PeerfactSim.KOM.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+package de.tud.kom.p2psim.impl.vehicular.caching;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import de.tudarmstadt.maki.simonstrator.api.Host;
+import de.tudarmstadt.maki.simonstrator.api.component.ComponentNotAvailableException;
+import de.tudarmstadt.maki.simonstrator.api.component.network.NetInterface;
+import de.tudarmstadt.maki.simonstrator.api.component.network.NetworkComponent.NetInterfaceName;
+import de.tudarmstadt.maki.simonstrator.api.component.sensor.environment.data.VectoralProperty;
+import de.tudarmstadt.maki.simonstrator.api.component.transport.ConnectivityListener;
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.VehicleInformationComponent;
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.caching.CachingComponent;
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.caching.decision.CacheDecisionStrategy;
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.caching.invalidation.CacheInvalidationStrategy;
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.caching.replacement.CacheReplacementStrategy;
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.information.AvailableInformationAttributes;
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.information.JamInformation;
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.information.PointInformation;
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.information.RoadInformation;
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.roadnetwork.RoadNetwork;
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.roadnetwork.RoadNetworkEdge;
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.roadnetwork.RoadNetworkRoute;
+
+public class DefaultCachingComponent
+implements CachingComponent, ConnectivityListener {
+	private Map<Class<? extends Object>, List<PointInformation>> _cache = new HashMap<>();
+
+	private Map<Integer, Integer> _lastColorValues = new HashMap<>();
+
+	private Host _host;
+
+	private CacheInvalidationStrategy _invalidationStrategy;
+
+	private CacheReplacementStrategy _replacementStrategy;
+
+	private CacheDecisionStrategy _decisionStrategy;
+
+	private double[] informationRatios = new double[] {1, 0.75, 0.5, 0.25, 0};
+
+	public DefaultCachingComponent(Host pHost,
+			CacheInvalidationStrategy pInvalidationStrategy,
+			CacheReplacementStrategy pReplacementStrategy,
+			CacheDecisionStrategy pDecisionStrategy) {
+		_host = pHost;
+
+		if (_host != null) {
+			_host.getNetworkComponent().getByName(NetInterfaceName.WIFI)
+			.addConnectivityListener(this);
+		}
+
+		_invalidationStrategy = pInvalidationStrategy;
+		_replacementStrategy = pReplacementStrategy;
+		_decisionStrategy = pDecisionStrategy;
+	}
+
+	@Override
+	public <T extends PointInformation> List<T> getDecidedCacheEntries(
+			Class<T> pCacheEntryClass) {
+		List<T> cacheEntries = getCacheEntries(pCacheEntryClass);
+
+		if (cacheEntries == null) {
+			return null;
+		}
+
+		Map<Object, List<PointInformation>> similarCacheEntries = new HashMap<>();
+
+		for (T t : cacheEntries) {
+			Object position = getEdgeOrPosition(t);
+			
+			if (!similarCacheEntries.containsKey(position)) {
+				similarCacheEntries.put(position, new ArrayList<>());
+			}
+			similarCacheEntries.get(position).add(t);
+		}
+
+		List<T> decidedInformation = new ArrayList<>();
+		for (List<PointInformation> similarEntries : similarCacheEntries
+				.values()) {
+			PointInformation correctInformation = _decisionStrategy
+					.decideOnCorrectInformation(similarEntries);
+			decidedInformation.add((T) correctInformation);
+		}
+
+		return decidedInformation;
+	}
+
+	@Override
+	public <T extends PointInformation> List<T> getCacheEntries(
+			Class<T> pCacheEntryClass) {
+		if (_cache.containsKey(pCacheEntryClass)) {
+			List<? extends PointInformation> cacheEntries = _cache
+					.get(pCacheEntryClass);
+			List<T> results = new ArrayList<>();
+
+			for (int i = 0; i < cacheEntries.size(); i++) {
+				PointInformation object = cacheEntries.get(i);
+				if (_invalidationStrategy.checkInformation(object)) {
+					cacheEntries.remove(i--);
+					continue;
+				}
+				results.add((T) object);
+			}
+
+			return results;
+		}
+		return null;
+	}
+
+	@Override
+	public <T extends PointInformation> boolean containsEntry(T pCacheEntry) {
+		if (_cache.containsKey(pCacheEntry)) {
+			List<? extends Object> cacheEntries = _cache.get(pCacheEntry);
+			return cacheEntries.contains(pCacheEntry);
+		}
+		return false;
+	}
+
+	@Override
+	public <T extends PointInformation> void storeCacheEntry(T pCacheEntry) {
+		if (!_cache.containsKey(pCacheEntry.getClass())) {
+			_cache.put(pCacheEntry.getClass(), new ArrayList<>());
+		}
+
+		List<PointInformation> entries = _cache.get(pCacheEntry.getClass());
+		entries.add(pCacheEntry);
+	}
+
+	@Override
+	public void initialize() {
+		_cache.clear();
+	}
+
+	@Override
+	public void shutdown() {
+	}
+
+	@Override
+	public Host getHost() {
+		return _host;
+	}
+
+	@Override
+	public void wentOnline(Host pHost, NetInterface pNetInterface) {
+		_cache.clear();
+	}
+
+	@Override
+	public void wentOffline(Host pHost, NetInterface pNetInterface) {
+
+	}
+
+	@Override
+	public void clear() {
+		_cache.clear();
+	}
+
+	public Object getEdgeOrPosition(PointInformation information) {
+		if (information.hasAttribute(AvailableInformationAttributes.EDGE)) {
+			return information
+					.getAttribute(AvailableInformationAttributes.EDGE);
+		} else if (information instanceof RoadInformation) {
+		    return ((RoadInformation) information).getEdge();
+		} else {
+			return information.getLocation();
+		}
+	}
+
+	public CacheDecisionStrategy getDecisionStrategy() {
+		return _decisionStrategy;
+	}
+
+	@Override
+	public String getNodeDescription() {
+		return "    " + getHost().getId();
+	}
+
+	@Override
+	public int getNodeColorDimensions() {
+		return 2;
+	}
+
+	@Override
+	public String[] getNodeColorDimensionDescriptions() {
+		return new String[] {"Route Information", "Number of jam information"};
+	}
+
+	@Override
+	public String[] getNodeColorDescriptions(int pDimension) {
+		if (pDimension == 0) {
+			String[] labels = new String[informationRatios.length];
+			for (int i = 0; i < informationRatios.length; i++) {
+				labels[i] = informationRatios[i] * 100 + "%";
+			}
+			return labels;
+		} else if (pDimension == 1) {
+			String[] numbers = new String[10];
+			for (int i = 0; i < numbers.length; i++) {
+				numbers[i] = String.valueOf(i);
+			}
+			return numbers;
+		}
+		return new String[0];
+	}
+
+	@Override
+	public int getNodeColor(int pDimension) {
+		if (pDimension == 0) {
+			List<JamInformation> decidedCacheEntries = getDecidedCacheEntries(JamInformation.class);
+			try {
+				VehicleInformationComponent vehicleInformationComponent = getHost().getComponent(VehicleInformationComponent.class);
+				if (vehicleInformationComponent.isValid()) {
+					RoadNetworkRoute currentRoute = vehicleInformationComponent.getCurrentRoute();
+					if (currentRoute != null) {
+						int count = 0;
+						int active = 0;
+						for (RoadNetworkEdge edge : currentRoute.getRoute()) {
+							if (edge.isActive()) {
+								if (decidedCacheEntries != null) {
+									for (JamInformation jamInformation : decidedCacheEntries) {
+										if (jamInformation.getEdge().equals(edge) && jamInformation.getValue()) {
+											count++;
+											break;
+										}
+									}
+								}
+								active++;
+							}
+						}
+						if (active != 0) {
+							double ratio = count / ((double) active);
+							for (int i = 0; i < informationRatios.length; i++) {
+								if (informationRatios[i] <= ratio) {
+									_lastColorValues.put(pDimension, i);
+									break;
+								}
+							}
+						} else {
+							_lastColorValues.put(pDimension, 0);
+						}
+					}
+				}
+			} catch (ComponentNotAvailableException e) {
+			}
+			if (_lastColorValues.containsKey(pDimension)) {
+				return _lastColorValues.get(pDimension);
+			}
+			return 0;
+		}
+		if (pDimension == 1) {
+			List<JamInformation> decidedCacheEntries = getDecidedCacheEntries(JamInformation.class);
+			if (decidedCacheEntries != null) {
+				_lastColorValues.put(pDimension, decidedCacheEntries.size());
+			}
+			if (_lastColorValues.containsKey(pDimension)) {
+				return Math.min(9, _lastColorValues.get(pDimension));
+			}
+			return 0;
+		}
+		return 0;
+	}
+
+	@Override
+	public boolean isActive() {
+		return getHost().getNetworkComponent().getByName(NetInterfaceName.MOBILE).isUp()
+				|| getHost().getNetworkComponent().getByName(NetInterfaceName.WIFI).isUp();
+	}
+}

src/de/tud/kom/p2psim/impl/vehicular/caching/decision/AveragingCacheDecisionStrategy.java

+/*
+ * Copyright (c) 2005-2010 KOM – Multimedia Communications Lab
+ *
+ * This file is part of PeerfactSim.KOM.
+ *
+ * PeerfactSim.KOM 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
+ * any later version.
+ *
+ * PeerfactSim.KOM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with PeerfactSim.KOM.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+package de.tud.kom.p2psim.impl.vehicular.caching.decision;
+
+import java.util.List;
+
+import de.tudarmstadt.maki.simonstrator.api.component.sensor.environment.data.NumericVectoralProperty;
+import de.tudarmstadt.maki.simonstrator.api.component.sensor.environment.data.jam.VectoralJamProperty;
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.caching.decision.CacheDecisionStrategy;
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.information.PointInformation;
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.information.RoadInformation;
+
+public class AveragingCacheDecisionStrategy implements CacheDecisionStrategy {
+
+	@Override
+	public <T extends PointInformation> T decideOnCorrectInformation(
+			List<T> pSimilarPointInformation) {
+		if (pSimilarPointInformation.size() == 1) {
+			T decision = pSimilarPointInformation.get(0);
+			return decision;
+		} else if (pSimilarPointInformation.size() == 0) {
+			return null;
+		}
+		
+		double sum = 0;
+		double count = 0;
+		
+		NumericVectoralProperty cloned = null;
+		
+		for (T t : pSimilarPointInformation) {
+			RoadInformation roadInformation = ((RoadInformation) t);
+			
+			NumericVectoralProperty property = (NumericVectoralProperty) roadInformation.getValue();
+			if (cloned == null) {
+				cloned = property.clone();
+			}
+			
+			sum += property.getMostProbableValue();
+			count++;
+		}
+
+		double value = sum / count;
+		
+		if (cloned instanceof VectoralJamProperty) {
+			((VectoralJamProperty) cloned).setSpeed(((int)(value / VectoralJamProperty.SCALING)) * VectoralJamProperty.SCALING);
+		} else {
+			throw new AssertionError("Unknown data type " + cloned.getClass().getSimpleName());
+		}
+
+		return (T) new RoadInformation(cloned);
+	}
+
+}

src/de/tud/kom/p2psim/impl/vehicular/caching/decision/CacheDecisionStrategyType.java

+/*
+ * Copyright (c) 2005-2010 KOM – Multimedia Communications Lab
+ *
+ * This file is part of PeerfactSim.KOM.
+ *
+ * PeerfactSim.KOM 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
+ * any later version.
+ *
+ * PeerfactSim.KOM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with PeerfactSim.KOM.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+package de.tud.kom.p2psim.impl.vehicular.caching.decision;
+
+import java.lang.reflect.Constructor;
+import java.lang.reflect.InvocationTargetException;
+import java.util.HashMap;
+import java.util.Map;
+
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.caching.decision.CacheDecisionStrategy;
+
+public enum CacheDecisionStrategyType {
+	DEFAULT(NewestCacheDecisionStrategy.class), NEWEST(NewestCacheDecisionStrategy.class), MAJORITY(MajorityVotingCacheDecisionStrategy.class), AVERAGING(AveragingCacheDecisionStrategy.class), TTL(TTLbasedCacheDecisionStrategy.class), OPTIMAL(OptimalCacheDecisionStrategy.class), RANDOM(RandomCacheDecisionStrategy.class), TTL_VECTOR(TTLbasedVectoralCacheDecisionStrategy.class), MAJORITY_VECTOR(MajorityVotingVectoralCacheDecisionStrategy.class);
+
+	private final Class<? extends CacheDecisionStrategy> decisionStrategy;
+	private final Map<String, String> params = new HashMap<>();
+
+	private CacheDecisionStrategyType(final Class<? extends CacheDecisionStrategy> decisionStrategy) {
+		this.decisionStrategy = decisionStrategy;
+	}
+
+	public CacheDecisionStrategy getDecisionStrategy() {
+		try {
+			try {
+				Constructor<? extends CacheDecisionStrategy> constructor = decisionStrategy.getConstructor(Map.class);
+				return constructor.newInstance(params);
+			} catch (NoSuchMethodException | SecurityException | IllegalArgumentException | InvocationTargetException e) {
+				return decisionStrategy.newInstance();
+			}
+		} catch (InstantiationException | IllegalAccessException e) {
+			throw new AssertionError(e);
+		}
+	}
+
+	public void addAttribute(String pKey, String pValue) {
+		params.put(pKey, pValue);
+	}
+}

src/de/tud/kom/p2psim/impl/vehicular/caching/decision/MajorityVotingCacheDecisionStrategy.java

+/*
+ * Copyright (c) 2005-2010 KOM – Multimedia Communications Lab
+ *
+ * This file is part of PeerfactSim.KOM.
+ *
+ * PeerfactSim.KOM 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
+ * any later version.
+ *
+ * PeerfactSim.KOM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with PeerfactSim.KOM.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+package de.tud.kom.p2psim.impl.vehicular.caching.decision;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.caching.decision.CacheDecisionStrategy;
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.information.PointInformation;
+
+public class MajorityVotingCacheDecisionStrategy implements CacheDecisionStrategy {
+
+	@Override
+	public <T extends PointInformation> T decideOnCorrectInformation(
+			List<T> pSimilarPointInformation) {
+		Map<Object, Integer> voting = new HashMap<>();
+		for (T t : pSimilarPointInformation) {
+			if (!voting.containsKey(t.getValue())) {
+				voting.put(t.getValue(), 0);
+			}
+
+			voting.put(t.getValue(), voting.get(t.getValue()) + 1);
+		}
+
+		Entry<Object, Integer> maxEntry = null;
+		for (Entry<Object, Integer> entry : voting.entrySet()) {
+			if (maxEntry == null) {
+				maxEntry = entry;
+			}
+
+			if (maxEntry.getValue() < entry.getValue()) {
+				maxEntry = entry;
+			}
+		}
+
+		long maxTimestamp = 0;
+		T maxFitting = null;
+		for (T t : pSimilarPointInformation) {
+			long timestamp = t.getDetectionDate();
+
+			if (t.getValue().equals(maxEntry.getKey()) && timestamp > maxTimestamp) {
+				maxTimestamp = timestamp;
+				maxFitting = t;
+			}
+		}
+
+		return maxFitting;
+	}
+
+}

src/de/tud/kom/p2psim/impl/vehicular/caching/decision/MajorityVotingVectoralCacheDecisionStrategy.java

+/*
+ * Copyright (c) 2005-2010 KOM – Multimedia Communications Lab
+ *
+ * This file is part of PeerfactSim.KOM.
+ *
+ * PeerfactSim.KOM 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
+ * any later version.
+ *
+ * PeerfactSim.KOM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with PeerfactSim.KOM.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+package de.tud.kom.p2psim.impl.vehicular.caching.decision;
+
+import java.util.List;
+
+import de.tudarmstadt.maki.simonstrator.api.Time;
+import de.tudarmstadt.maki.simonstrator.api.component.sensor.environment.data.TemporalDependencyMatrix;
+import de.tudarmstadt.maki.simonstrator.api.component.sensor.environment.data.VectoralProperty;
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.caching.decision.CacheDecisionStrategy;
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.information.AvailableInformationAttributes;
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.information.PointInformation;
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.information.RoadInformation;
+
+public class MajorityVotingVectoralCacheDecisionStrategy implements CacheDecisionStrategy {
+	private static final long SCALING = Time.SECOND;
+
+	@Override
+	public <T extends PointInformation> T decideOnCorrectInformation(
+			List<T> pSimilarPointInformation) {
+		VectoralProperty currentProperty = null;
+		
+		long minTimestamp = Long.MAX_VALUE;
+		long maxTimestamp = 0;
+		for (T t : pSimilarPointInformation) {
+			long timestamp = t.getDetectionDate();
+
+			if (timestamp < minTimestamp) {
+				minTimestamp = timestamp;
+			}
+			if (timestamp > maxTimestamp) {
+				maxTimestamp = timestamp;
+			}
+		}
+		
+		for (T t : pSimilarPointInformation) {
+			RoadInformation roadInformation = ((RoadInformation) t);
+			
+			VectoralProperty property = (VectoralProperty) roadInformation.getValue();
+			
+			TemporalDependencyMatrix dependencyMatrix = property.getDependencyMatrix();
+			
+			VectoralProperty agedProperty = property.age((maxTimestamp - property.getDetectionDate()) / SCALING, dependencyMatrix);
+			if (currentProperty != null) {
+				currentProperty = currentProperty.combine(agedProperty);
+			} else {
+				currentProperty = agedProperty;
+			}
+		}
+		
+		TemporalDependencyMatrix dependencyMatrix = currentProperty.getDependencyMatrix();
+		
+		VectoralProperty agedProperty = currentProperty.age((Time.getCurrentTime() - maxTimestamp) / SCALING, dependencyMatrix);
+		
+		RoadInformation roadInformation = new RoadInformation(agedProperty);
+		
+		copyAttributes((RoadInformation) pSimilarPointInformation.get(0), roadInformation);
+		
+		return (T) roadInformation;
+	}
+
+	/**
+	 * @param pT
+	 * @param pRoadInformation
+	 */
+	private void copyAttributes(RoadInformation pSrc, RoadInformation pDest) {
+		for (AvailableInformationAttributes attribute : pSrc.getAvailableAttributes()) {
+			pDest.setAttribute(attribute, pSrc.getAttribute(attribute));
+		}
+	}
+
+}

src/de/tud/kom/p2psim/impl/vehicular/caching/decision/NewestCacheDecisionStrategy.java

+/*
+ * Copyright (c) 2005-2010 KOM – Multimedia Communications Lab
+ *
+ * This file is part of PeerfactSim.KOM.
+ *
+ * PeerfactSim.KOM 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
+ * any later version.
+ *
+ * PeerfactSim.KOM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with PeerfactSim.KOM.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+package de.tud.kom.p2psim.impl.vehicular.caching.decision;
+
+import java.util.List;
+
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.caching.decision.CacheDecisionStrategy;
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.information.PointInformation;
+
+public class NewestCacheDecisionStrategy implements CacheDecisionStrategy {
+
+	@Override
+	public <T extends PointInformation> T decideOnCorrectInformation(
+			List<T> pSimilarPointInformation) {
+		long newestDetectionTime = 0;
+		T chosenInformation = null;
+		for (T t : pSimilarPointInformation) {
+			if (t.getDetectionDate() > newestDetectionTime) {
+				newestDetectionTime = t.getDetectionDate();
+				chosenInformation = t;
+			}
+		}
+		return chosenInformation;
+	}
+
+}

src/de/tud/kom/p2psim/impl/vehicular/caching/decision/OptimalCacheDecisionStrategy.java

+/*
+ * Copyright (c) 2005-2010 KOM – Multimedia Communications Lab
+ *
+ * This file is part of PeerfactSim.KOM.
+ *
+ * PeerfactSim.KOM 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
+ * any later version.
+ *
+ * PeerfactSim.KOM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with PeerfactSim.KOM.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+package de.tud.kom.p2psim.impl.vehicular.caching.decision;
+
+import java.util.List;
+
+import de.tudarmstadt.maki.simonstrator.api.Time;
+import de.tudarmstadt.maki.simonstrator.api.component.sensor.environment.data.VectoralProperty;
+import de.tudarmstadt.maki.simonstrator.api.component.sensor.environment.data.jam.JamProperty;
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.caching.decision.CacheDecisionStrategy;
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.information.AvailableInformationAttributes;
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.information.PointInformation;
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.roadnetwork.RoadNetworkEdge;
+
+public class OptimalCacheDecisionStrategy implements CacheDecisionStrategy {
+	public OptimalCacheDecisionStrategy() {
+	}
+
+	@Override
+	public <T extends PointInformation> T decideOnCorrectInformation(
+			List<T> pSimilarPointInformation) {
+		if (pSimilarPointInformation.size() == 1) {
+			T decision = pSimilarPointInformation.get(0);
+			return decision;
+		} else if (pSimilarPointInformation.size() == 0) {
+			return null;
+		}
+		
+		RoadNetworkEdge edge = (RoadNetworkEdge) pSimilarPointInformation.get(0).getAttribute(AvailableInformationAttributes.EDGE);
+		
+		double actualSpeed = edge.getCurrentSpeed();
+		
+		JamProperty jamProperty = edge.getJamProperty();
+
+		long maxTimestamp;
+		if (jamProperty != null) {
+			maxTimestamp = jamProperty.getDetectionDate();
+		} else {
+			maxTimestamp = -1;
+		}
+
+		double difference = Double.MAX_VALUE;
+		T maxFitting = null;
+		for (T t : pSimilarPointInformation) {
+			long timestamp = t.getDetectionDate();
+
+			Object currentValue = t.getValue();
+			if (currentValue instanceof VectoralProperty) {
+				currentValue = ((VectoralProperty) currentValue).getMostProbableValue();
+			}
+			
+			if (timestamp >= maxTimestamp) {
+				if (currentValue.equals(actualSpeed)) {
+					maxFitting = t;
+					difference = 0;
+				} else if (currentValue instanceof Number && Math.abs(((Number)currentValue).doubleValue() - actualSpeed) < difference) {
+					maxFitting = t;
+					difference = Math.abs(((Number)currentValue).doubleValue() - actualSpeed);
+				}
+			}
+		}
+
+		if (maxFitting == null) {
+			maxTimestamp = -1;
+
+			for (T t : pSimilarPointInformation) {
+				long timestamp = t.getDetectionDate();
+
+				if (timestamp >= maxTimestamp) {
+					maxTimestamp = timestamp;
+					maxFitting = t;
+				}
+			}
+		}
+
+		return maxFitting;
+	}
+}

src/de/tud/kom/p2psim/impl/vehicular/caching/decision/RandomCacheDecisionStrategy.java

+/*
+ * Copyright (c) 2005-2010 KOM – Multimedia Communications Lab
+ *
+ * This file is part of PeerfactSim.KOM.
+ *
+ * PeerfactSim.KOM 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
+ * any later version.
+ *
+ * PeerfactSim.KOM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with PeerfactSim.KOM.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+package de.tud.kom.p2psim.impl.vehicular.caching.decision;
+
+import java.util.List;
+import java.util.Random;
+
+import de.tudarmstadt.maki.simonstrator.api.Randoms;
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.caching.decision.CacheDecisionStrategy;
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.information.PointInformation;
+
+public class RandomCacheDecisionStrategy implements CacheDecisionStrategy {
+	private Random _random = Randoms.getRandom(getClass());
+
+	public RandomCacheDecisionStrategy() {
+	}
+
+	@Override
+	public <T extends PointInformation> T decideOnCorrectInformation(
+			List<T> pSimilarPointInformation) {
+		if (pSimilarPointInformation.size() == 1) {
+			T decision = pSimilarPointInformation.get(0);
+			return decision;
+		} else if (pSimilarPointInformation.size() == 0) {
+			return null;
+		}
+
+		return pSimilarPointInformation.get(_random.nextInt(pSimilarPointInformation.size()));
+	}
+}

src/de/tud/kom/p2psim/impl/vehicular/caching/decision/TTLbasedCacheDecisionStrategy.java

+/*
+ * Copyright (c) 2005-2010 KOM – Multimedia Communications Lab
+ *
+ * This file is part of PeerfactSim.KOM.
+ *
+ * PeerfactSim.KOM 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
+ * any later version.
+ *
+ * PeerfactSim.KOM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with PeerfactSim.KOM.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+package de.tud.kom.p2psim.impl.vehicular.caching.decision;
+
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+
+import de.tudarmstadt.maki.simonstrator.api.Time;
+import de.tudarmstadt.maki.simonstrator.api.component.sensor.environment.data.RoadProperty;
+import de.tudarmstadt.maki.simonstrator.api.component.sensor.environment.data.VectoralProperty;
+import de.tudarmstadt.maki.simonstrator.api.component.sensor.environment.data.jam.VectoralJamProperty;
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.caching.decision.CacheDecisionStrategy;
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.information.AvailableInformationAttributes;
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.information.PointInformation;
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.information.RoadInformation;
+import edu.emory.mathcs.backport.java.util.Arrays;
+
+public class TTLbasedCacheDecisionStrategy implements CacheDecisionStrategy {
+	private static final long SCALING = Time.SECOND;
+
+	private static final double ACCURACY_FACTOR = 100000;
+
+	private long ttl = 300 * Time.SECOND / SCALING;
+	private double accuracy = 1;
+
+	private double costWrongKeep = 1;
+	private double costWrongChange = 1;
+
+	private Object _lastDecision = false;
+
+	public TTLbasedCacheDecisionStrategy(Map<String, String> pParams) {
+		for (Entry<String, String> param : pParams.entrySet()) {
+			switch (param.getKey()) {
+			case "ACCURACY":
+				accuracy = Double.valueOf(param.getValue());
+				break;
+			case "COST_RATIO":
+				double ratio = Double.valueOf(param.getValue());
+				costWrongChange = 2 / (ratio + 1);
+				costWrongKeep = 2 - costWrongChange;
+				break;
+			default:
+				break;
+			}
+		}
+	}
+
+	public double getCostWrongChange() {
+		return costWrongChange;
+	}
+
+	public double getCostWrongKeep() {
+		return costWrongKeep;
+	}
+
+	@Override
+	public <T extends PointInformation> T decideOnCorrectInformation(
+			List<T> pSimilarPointInformation) {
+		if (pSimilarPointInformation.size() == 1) {
+			T decision = pSimilarPointInformation.get(0);
+			_lastDecision = decision.getValue();
+			return decision;
+		} else if (pSimilarPointInformation.size() == 0) {
+			return null;
+		}
+		
+		Collections.sort(pSimilarPointInformation, new Comparator<T>() {
+
+			@Override
+			public int compare(T pArg0, T pArg1) {
+				return Long.compare(pArg0.getDetectionDate(), pArg1.getDetectionDate());
+			}
+			
+		});
+
+		long minTimestamp = Long.MAX_VALUE;
+		long maxTimestamp = 0;
+		Object value = pSimilarPointInformation.get(0).getValue();
+		boolean differentValue = false;
+		for (T t : pSimilarPointInformation) {
+			if (!t.hasAttribute(AvailableInformationAttributes.TTL)) {
+				throw new AssertionError("Unable to perform TTL-based majority voting witout TTL");
+			}
+			long timestamp = t.getDetectionDate();
+
+			if (timestamp < minTimestamp) {
+				minTimestamp = timestamp;
+			}
+			if (timestamp > maxTimestamp) {
+				maxTimestamp = timestamp;
+			}
+
+			if (!value.equals(t.getValue())) {
+				differentValue = true;
+			}
+		}
+
+		if (differentValue) {
+			long difference = maxTimestamp - minTimestamp;
+
+			if (difference == 0) {
+				return pSimilarPointInformation.get(pSimilarPointInformation.size() - 1);
+			}
+
+			double rate = difference / ((double) (pSimilarPointInformation.size() - 1) * SCALING);
+
+			long ttl = (long)pSimilarPointInformation.get(0).getAttribute(AvailableInformationAttributes.TTL) / SCALING;
+			rate = Math.min(rate, ttl / 10.0);
+
+			double b;
+			if (Boolean.FALSE.equals(_lastDecision)) {
+				b = determineB(rate, 1 - accuracy, ttl, costWrongKeep, costWrongChange);
+			} else {
+				b = determineB(rate, 1 - accuracy, ttl, costWrongChange, costWrongKeep);
+			}
+
+			Map<Object, Double> weight = new HashMap<>();
+			
+			for (T t : pSimilarPointInformation) {
+				double impact = calculateImpact(1 - accuracy, ttl, t.getDetectionDate() / SCALING, b, maxTimestamp / SCALING);
+
+				double sumImpact = 0;
+
+				Object currentValue = t.getValue();
+				
+				if (currentValue instanceof VectoralJamProperty) {
+					currentValue = ((VectoralJamProperty) currentValue).getMostProbableValue();
+				}
+
+				if (weight.containsKey(currentValue)) {
+					sumImpact = weight.get(currentValue);
+				}
+				sumImpact += impact;
+
+				weight.put(currentValue, sumImpact);
+			}
+
+			double maxWeight = -1;
+			Object maxValue = null;
+
+			for (Object key : weight.keySet()) {
+				if (weight.get(key) > maxWeight) {
+					maxWeight = weight.get(key);
+					maxValue = key;
+				}
+			}
+
+			maxTimestamp = -1;
+			T maxFitting = null;
+			for (T t : pSimilarPointInformation) {
+				long timestamp = t.getDetectionDate();
+
+				Object currentValue = t.getValue();
+				if (currentValue instanceof VectoralProperty) {
+					currentValue = ((VectoralProperty)currentValue).getMostProbableValue();
+				}
+				
+				if (currentValue.equals(maxValue) && timestamp > maxTimestamp) {
+					maxTimestamp = timestamp;
+					maxFitting = t;
+				}
+			}
+			
+			if (maxFitting.getValue() instanceof VectoralProperty) {
+				VectoralProperty vectoralProperty = ((VectoralProperty)maxFitting.getValue()).clone();
+				double[] valueProbabilities = vectoralProperty.getValueProbabilities();
+				Arrays.fill(valueProbabilities, 0);
+				
+				double sum = 0;
+				for (Object key : weight.keySet()) {
+					valueProbabilities[vectoralProperty.getIndexForValue(key)] = weight.get(key);
+					sum += weight.get(key);
+				}
+				
+				for (int i = 0; i < valueProbabilities.length; i++) {
+					valueProbabilities[i] /= sum;
+				}
+				
+				RoadInformation roadInformation = new RoadInformation(vectoralProperty);
+				roadInformation.copyAttributes((RoadInformation)maxFitting);
+				maxFitting = (T) roadInformation;
+			}
+
+			_lastDecision = maxFitting.getValue();
+
+			return maxFitting;
+		} else {
+			maxTimestamp = -1;
+			T maxFitting = null;
+			for (T t : pSimilarPointInformation) {
+				long timestamp = (long) t.getAttribute(AvailableInformationAttributes.TTL);
+
+				if (timestamp > maxTimestamp) {
+					maxTimestamp = timestamp;
+					maxFitting = t;
+				}
+			}
+
+			_lastDecision = maxFitting.getValue();
+
+			return maxFitting;
+		}
+	}
+	
+	public double calculateImpact(double errorProbability, long ttl, long time, double b, long maxTimestamp) {
+		long age = maxTimestamp - time;
+		if (errorProbability == 0) {
+			if (time == maxTimestamp) {
+				return 1;
+			} else {
+				return 0;
+			}
+		} else if (errorProbability == 1) {
+			return 1;
+		} else if (errorProbability == 0.5) {
+			return (errorProbability - 1) / ttl * age + errorProbability;
+		} else if (b == Double.NEGATIVE_INFINITY) {
+			if (time == maxTimestamp) {
+				return 1;
+			} else {
+				return 0;
+			}
+		}
+
+		return (1 - errorProbability) * (Math.exp(b * age) - Math.exp(b * ttl)) / (1 - Math.exp(b * ttl));
+	}
+
+	public double getChangeProbability(long ttl) {
+		return 1 - Math.pow(0.5, 1 / (double) ttl);
+	}
+
+	public int getOptimalMessageAmountForSwitch(double changeProbability, double errorProbability, double costSlow, double costFast) {
+		return (int) Math.round(Math.log(-changeProbability / Math.log(errorProbability) * costSlow / costFast) / Math.log(errorProbability));
+	}
+
+	public double determineB(double rate, double errorProbability, long ttl, double costSlow, double costFast) {
+		return determineB(rate, errorProbability, ttl, costSlow, costFast, 1);
+	}
+
+	public double determineB(double rate, double errorProbability, long ttl, double costSlow, double costFast, int reversed) {
+		if (errorProbability == 0 || errorProbability == 1 || errorProbability == 0.5) {
+			return Double.NaN;
+		}
+
+		double b;
+		double p_c = getChangeProbability((long) (ttl / rate));
+
+		int optimalAmount = getOptimalMessageAmountForSwitch(p_c, errorProbability, costSlow, costFast);
+
+		if (optimalAmount == 1) {
+			return Double.NEGATIVE_INFINITY;
+		}
+		
+		boolean first = true;
+
+		double leftSide;
+		double rightSide;
+
+		double step = 5;
+
+		if (errorProbability < 0.5) {
+			b = -2 * step * reversed;
+		} else {
+			b = 2 * step * reversed;
+		}
+
+		int similar = 0;
+		double lastDifference = -1;
+		do {
+			leftSide = calculateWeightingForOldState(optimalAmount, rate, errorProbability, ttl, b);
+			rightSide = calculateWeightingForNewState(optimalAmount, rate, errorProbability, ttl, b);
+			if (Math.abs(Math.round((rightSide - leftSide) * ACCURACY_FACTOR)) == lastDifference) {
+				similar++;
+			} else {
+				lastDifference = Math.abs(Math.round((rightSide - leftSide) * ACCURACY_FACTOR));
+				similar = 0;
+			}
+
+			if (Double.isNaN(leftSide) || Double.isNaN(rightSide) || similar > 100) {
+				if (reversed != -1) {
+					double determineB = determineB(rate, errorProbability, ttl, costSlow, costFast, -1);
+					if (!Double.isNaN(determineB)) {
+						return determineB;
+					} else {
+						return b;
+					}
+				} else {
+					return Double.NaN;
+				}
+			}
+
+			leftSide = Math.round(leftSide * ACCURACY_FACTOR);
+			rightSide = Math.round(rightSide * ACCURACY_FACTOR);
+
+			if (leftSide > rightSide) {
+				if (b < 0) {
+					b -= step;
+					if (!first) {
+						step *= 0.5;
+					}
+				} else {
+					b -= step;
+					step *= 0.5;
+					first = false;
+				}
+			} else if (leftSide < rightSide) {
+				if (b > 0) {
+					b += step;
+					if (!first) {
+						step *= 0.5;
+					}
+				} else {
+					b += step;
+					step *= 0.5;
+					first = false;
+				}
+			} else {
+				break;
+			}
+		} while (true);
+
+		return b;
+	}
+
+	public double calculateWeightingForOldState(int optimalMessageAmount, double rate, double errorProbability, long ttl, double b) {
+		double impact = 0;
+		for (int a = optimalMessageAmount; a < Math.max(Math.floor(ttl / rate), optimalMessageAmount + 2); a++) {
+			impact += calculateImpact(errorProbability, ttl, Time.getCurrentTime() / SCALING - (long)Math.floor(a * rate), b, Time.getCurrentTime() / SCALING);
+		}
+		return impact;
+	}
+
+	public double calculateWeightingForNewState(int optimalMessageAmount, double rate, double errorProbability, long ttl, double b) {
+		double impact = 0;
+		for (int a = 0; a < optimalMessageAmount; a++) {
+			impact += calculateImpact(errorProbability, ttl, Time.getCurrentTime() / SCALING - (long)Math.floor(a * rate), b, Time.getCurrentTime() / SCALING);
+		}
+		return impact;
+	}
+}

src/de/tud/kom/p2psim/impl/vehicular/caching/decision/TTLbasedVectoralCacheDecisionStrategy.java

+/*
+ * Copyright (c) 2005-2010 KOM – Multimedia Communications Lab
+ *
+ * This file is part of PeerfactSim.KOM.
+ *
+ * PeerfactSim.KOM 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
+ * any later version.
+ *
+ * PeerfactSim.KOM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with PeerfactSim.KOM.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+package de.tud.kom.p2psim.impl.vehicular.caching.decision;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Comparator;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+
+import de.tudarmstadt.maki.simonstrator.api.Time;
+import de.tudarmstadt.maki.simonstrator.api.component.sensor.environment.data.TemporalDependencyMatrix;
+import de.tudarmstadt.maki.simonstrator.api.component.sensor.environment.data.VectoralProperty;
+import de.tudarmstadt.maki.simonstrator.api.component.sensor.environment.data.measurement.MeasurementDistributionTypeContainer;
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.caching.decision.CacheDecisionStrategy;
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.information.AvailableInformationAttributes;
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.information.PointInformation;
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.information.RoadInformation;
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.roadnetwork.RoadNetworkEdge;
+import edu.emory.mathcs.backport.java.util.Collections;
+
+public class TTLbasedVectoralCacheDecisionStrategy implements CacheDecisionStrategy {
+	private static final long SCALING = Time.SECOND;
+
+	private static final double ACCURACY_FACTOR = 100000;
+
+	private static final double MIN_STEP = 0.00001;
+
+	private double accuracy = 1;
+
+	private double costWrongKeep = 1;
+	private double costWrongChange = 1;
+
+	private Object _lastDecision = null;
+
+	public TTLbasedVectoralCacheDecisionStrategy(Map<String, String> pParams) {
+		for (Entry<String, String> param : pParams.entrySet()) {
+			switch (param.getKey()) {
+			case "ACCURACY":
+				accuracy = Double.valueOf(param.getValue());
+				break;
+			case "COST_RATIO":
+				double ratio = Double.valueOf(param.getValue());
+				costWrongChange = 2 / (ratio + 1);
+				costWrongKeep = 2 - costWrongChange;
+				break;
+			default:
+				break;
+			}
+		}
+	}
+
+	public double getCostWrongChange() {
+		return costWrongChange;
+	}
+
+	public double getCostWrongKeep() {
+		return costWrongKeep;
+	}
+
+	@Override
+	public <T extends PointInformation> T decideOnCorrectInformation(
+			List<T> pSimilarPointInformation) {
+		if (pSimilarPointInformation.size() == 1) {
+			T decision = pSimilarPointInformation.get(0);
+			_lastDecision = decision.getValue();
+			return decision;
+		} else if (pSimilarPointInformation.size() == 0) {
+			return null;
+		}
+		
+		Collections.sort(pSimilarPointInformation, new Comparator<T>() {
+
+			@Override
+			public int compare(T pArg0, T pArg1) {
+				return Long.compare(pArg0.getDetectionDate(), pArg1.getDetectionDate());
+			}
+			
+		});
+
+		long minTimestamp = Long.MAX_VALUE;
+		long maxTimestamp = 0;
+		Object value = pSimilarPointInformation.get(0).getValue();
+		if (value instanceof VectoralProperty) {
+			value = ((VectoralProperty) value).getMostProbableIndex();
+		}
+		boolean differentValue = false;
+		
+		List<Integer> possibleValues = new ArrayList<>();
+		
+		for (T t : pSimilarPointInformation) {
+			if (!t.hasAttribute(AvailableInformationAttributes.TTL)) {
+				throw new AssertionError("Unable to perform TTL-based majority voting witout TTL");
+			}
+			long timestamp = t.getDetectionDate();
+
+			if (timestamp < minTimestamp) {
+				minTimestamp = timestamp;
+			}
+			if (timestamp > maxTimestamp) {
+				maxTimestamp = timestamp;
+			}
+
+			Object currentValue = t.getValue();
+			if (currentValue instanceof VectoralProperty) {
+				VectoralProperty currentProperty = (VectoralProperty) currentValue;
+				currentValue = currentProperty.getMostProbableIndex();
+				
+				if (!value.equals(currentValue)) {
+					differentValue = true;
+				}
+				
+				for (int i = 0; i < currentProperty.getValueProbabilities().length; i++) {
+					if (!possibleValues.contains(i)) {
+						possibleValues.add(i);
+					}
+				}
+			}
+		}
+		
+		if (differentValue) {
+			long difference = maxTimestamp - minTimestamp;
+
+			if (difference == 0) {
+				return pSimilarPointInformation.get(pSimilarPointInformation.size() - 1);
+			}
+
+			double rate = difference / ((double) (pSimilarPointInformation.size() - 1) * SCALING);
+
+			long ttl = getTTL(pSimilarPointInformation.get(0));
+			double numberOfMessages = ttl / rate + 1;
+
+			VectoralProperty currentProperty = null;
+
+			List<Double> bValues = new ArrayList<>();
+			double b;
+			for (Integer possibleValue : possibleValues) {
+				double temp = determineB((VectoralProperty) pSimilarPointInformation.get(0).getValue(), ((RoadInformation)pSimilarPointInformation.get(0)).getEdge(), possibleValue, getChangeRate(pSimilarPointInformation.get(0), rate), rate, 1 - accuracy, numberOfMessages, costWrongKeep, costWrongChange);
+				
+				if (!Double.isNaN(temp)) {
+					bValues.add(temp);
+				}
+			}
+			
+			Collections.sort(bValues);
+			
+			if (bValues.size() > 0) {
+				if (bValues.size() % 2 == 0) {
+					b = (bValues.get(bValues.size() / 2) + bValues.get(bValues.size() / 2 - 1)) / 2.0;
+				} else {
+					b = bValues.get(bValues.size() / 2);
+				}
+			} else {
+				b = Double.NEGATIVE_INFINITY;
+			}
+			
+			int count = 0;
+			for (T t : pSimilarPointInformation) {
+				RoadInformation roadInformation = ((RoadInformation) t);
+				VectoralProperty property = (VectoralProperty) roadInformation.getValue();
+				
+				double impact = calculateImpact(1 - accuracy, numberOfMessages, (((t.getDetectionDate() - maxTimestamp) / SCALING  + ttl) / (double)ttl) * numberOfMessages, b) / (accuracy);
+
+				TemporalDependencyMatrix dependencyMatrix = property.getDependencyMatrix();
+				dependencyMatrix = modifyDependencyMatrix(dependencyMatrix.age((maxTimestamp - property.getDetectionDate()) / SCALING), impact);
+				
+ 				VectoralProperty agedProperty = property.age(1, dependencyMatrix);
+				if (currentProperty != null) {
+					currentProperty = currentProperty.combine(agedProperty);
+				} else {
+					currentProperty = agedProperty;
+				}
+			}
+			
+			if (Double.isNaN(currentProperty.getValueProbabilities()[0])) {
+				return pSimilarPointInformation.get(pSimilarPointInformation.size() - 1);
+			}
+			
+			RoadInformation roadInformation = new RoadInformation(currentProperty);
+			
+			copyAttributes((RoadInformation) pSimilarPointInformation.get(0), roadInformation);
+			
+			_lastDecision = roadInformation.getValue();
+			
+			return (T) roadInformation;
+		} else {
+			maxTimestamp = -1;
+			T maxFitting = null;
+			for (T t : pSimilarPointInformation) {
+				long timestamp = (long) t.getAttribute(AvailableInformationAttributes.TTL);
+
+				if (timestamp > maxTimestamp) {
+					maxTimestamp = timestamp;
+					maxFitting = t;
+				}
+			}
+
+			_lastDecision = maxFitting.getValue();
+
+			return maxFitting;
+		}
+	}
+
+	/**
+	 * @param pT
+	 * @return
+	 */
+	private <T extends PointInformation> double getAccuracy(T pT) {
+//		if (pT instanceof RoadInformation) {
+//			RoadInformation roadInformation = ((RoadInformation) pT);
+//			VectoralProperty property = (VectoralProperty) roadInformation.getValue();
+//			double accuracy = property.getProbabilityForIndex(property.getMostProbableIndex());
+//			return accuracy;
+//		}
+		return this.accuracy;
+	}
+
+	private <T extends PointInformation> double getChangeRate(T pT, double pRate) {
+//		if (pT instanceof RoadInformation) {
+//			RoadInformation roadInformation = ((RoadInformation) pT);
+//			VectoralProperty property = (VectoralProperty) roadInformation.getValue();
+//			
+//			TemporalDependencyMatrix dependencyMatrix = property.getDependencyMatrix();
+//			return 1 - Math.pow(1 - dependencyMatrix.getChangeProbability(0), pRate * (SCALING / Time.SECOND));
+//		}
+		return getChangeProbability((long) (getTTL(pT) / pRate));
+	}
+
+	public <T extends PointInformation> long getTTL(
+			T pT) {
+		return (long)pT.getAttribute(AvailableInformationAttributes.TTL) / SCALING;
+	}
+
+	/**
+	 * @param pT
+	 * @param pRoadInformation
+	 */
+	private void copyAttributes(RoadInformation pSrc, RoadInformation pDest) {
+		for (AvailableInformationAttributes attribute : pSrc.getAvailableAttributes()) {
+			pDest.setAttribute(attribute, pSrc.getAttribute(attribute));
+		}
+	}
+
+	private TemporalDependencyMatrix modifyDependencyMatrix(
+			TemporalDependencyMatrix pDependencyMatrix, double pImpact) {
+		TemporalDependencyMatrix result = pDependencyMatrix.clone();
+		
+		double[][] dependencies = result.getDependencies();
+		for (int i = 0; i < dependencies.length; i++) {
+			double finalPercentages = 1.0 / dependencies[i].length;
+			
+			for (int j = 0; j < dependencies[i].length; j++) {
+				dependencies[i][j] = finalPercentages + (pDependencyMatrix.getDependencies()[i][j] - finalPercentages) * pImpact;
+			}
+		}
+		
+		return result;
+	}
+
+	public double calculateImpact(double errorProbability, double pNumberOfMessages, double pMessageNumber, double b) {
+		double age = pNumberOfMessages - pMessageNumber;
+		if (errorProbability == 0) {
+			if (pMessageNumber == pNumberOfMessages) {
+				return 1;
+			} else {
+				return 0;
+			}
+		} else if (errorProbability == 1) {
+			return 1;
+		} else if (errorProbability == 0.5 || b == 0) {
+			return (1 - errorProbability) / pNumberOfMessages * age + errorProbability;
+		} else if (b == Double.NEGATIVE_INFINITY) {
+			if (pMessageNumber == pNumberOfMessages) {
+				return 1;
+			} else {
+				return 0;
+			}
+		}
+
+		return (1 - errorProbability) * (Math.exp(b * age) - Math.exp(b * pNumberOfMessages)) / (1 - Math.exp(b * pNumberOfMessages));
+	}
+
+	public double getChangeProbability(long ttl) {
+		return 1 - Math.pow(0.5, 1 / (double) ttl);
+	}
+
+	public int getOptimalMessageAmountForSwitch(double changeProbability, double errorProbability, double costSlow, double costFast) {
+		return (int) Math.round(Math.log(-changeProbability / Math.log(errorProbability) * costSlow / costFast) / Math.log(errorProbability));
+	}
+
+	public double determineB(VectoralProperty pTemplate, RoadNetworkEdge pRoadNetworkEdge, int pPossibleValue, double change, double rate, double errorProbability, double pNumberOfMessages, double costSlow, double costFast) {
+		if (errorProbability == 0 || errorProbability == 1 || errorProbability == 0.5) {
+			return Double.NaN;
+		}
+		
+		if (_lastDecision != null) {
+			if (pPossibleValue == ((VectoralProperty)_lastDecision).getMostProbableIndex()) {
+				return Double.NaN;
+			}
+		} else {
+			if (pPossibleValue == pTemplate.getDefaultIndex()) {
+				return Double.NaN;
+			}
+		}
+		
+		double b;
+		double p_c = change;
+		
+		int optimalAmount = getOptimalMessageAmountForSwitch(p_c, errorProbability, costSlow, costFast);
+		
+		if ((int)pNumberOfMessages <= optimalAmount) {
+			return Double.POSITIVE_INFINITY;
+		}
+		
+		if (optimalAmount == 1) {
+			return Double.NEGATIVE_INFINITY;
+		}
+		
+		boolean first = true;
+		
+		double step = 10;
+		
+		if (errorProbability < 0.5) {
+			b = -1 * step;
+		} else {
+			b = 1 * step;
+		}
+		
+		do {
+			VectoralProperty valueAfterN = calculateMostProbable(pTemplate, pRoadNetworkEdge, pPossibleValue, optimalAmount, rate, errorProbability, pNumberOfMessages, b);
+			double probableValueAfterN = Double.NaN;
+			if (valueAfterN != null) {
+				probableValueAfterN = valueAfterN.getMostProbableIndex();
+			}
+			VectoralProperty valueBeforeN = calculateMostProbable(pTemplate, pRoadNetworkEdge, pPossibleValue, optimalAmount - 1, rate, errorProbability, pNumberOfMessages, b);
+			double probableValueBeforeN = Double.NaN;
+			if (valueBeforeN != null) {
+				probableValueBeforeN = valueBeforeN.getMostProbableIndex();
+			}
+			
+			if (probableValueAfterN == pPossibleValue && probableValueAfterN != probableValueBeforeN) {
+				return b;
+			}
+			
+			if (!Double.isNaN(probableValueBeforeN) && !Double.isNaN(probableValueBeforeN) && step >= MIN_STEP) {
+				if (probableValueAfterN != pPossibleValue) {
+					if (b < 0) {
+						b -= step;
+						if (!first) {
+							step *= 0.5;
+						}
+					} else {
+						b -= step;
+						step *= 0.5;
+						first = false;
+					}
+				} else if (probableValueAfterN == pPossibleValue && probableValueAfterN == probableValueBeforeN) {
+					if (b > 0) {
+						b += step;
+						if (!first) {
+							step *= 0.5;
+						}
+					} else {
+						b += step;
+						step *= 0.5;
+						first = false;
+					}
+				} else {
+					return Double.NaN;
+				}
+			} else {
+				return Double.NaN;
+			}
+		} while (true);
+	}
+
+	public VectoralProperty calculateMostProbable(VectoralProperty pTemplate, RoadNetworkEdge pRoadNetworkEdge, int pNewValue, int optimalMessageAmount, double rate, double errorProbability, double pNumberOfMessages, double b) {
+		VectoralProperty currentProperty = null;
+		
+		for (int a = optimalMessageAmount + 1; a <= pNumberOfMessages; a++) {
+			VectoralProperty jamProperty = pTemplate.clone();
+			
+			if (_lastDecision != null) {
+				jamProperty.set(((VectoralProperty)_lastDecision).getMostProbableIndex(), accuracy, MeasurementDistributionTypeContainer.getDistribution(pTemplate.getClass()));
+			} else {
+				jamProperty.set(pTemplate.getDefaultIndex(), accuracy, MeasurementDistributionTypeContainer.getDistribution(pTemplate.getClass()));
+			}
+			TemporalDependencyMatrix temporalDependencyMatrix = jamProperty.getDependencyMatrix();
+			temporalDependencyMatrix = temporalDependencyMatrix.age((long) (a * rate));
+			double impact = calculateImpact(errorProbability, pNumberOfMessages, pNumberOfMessages - a, b);
+			
+			if (Double.isNaN(impact)) {
+				return null;
+			}
+			
+			temporalDependencyMatrix = modifyDependencyMatrix(temporalDependencyMatrix, impact);
+			jamProperty = (VectoralProperty) jamProperty.age(1, temporalDependencyMatrix);
+
+			if (currentProperty != null) {
+				currentProperty = (VectoralProperty) currentProperty.combine(jamProperty);
+			} else {
+				currentProperty = jamProperty;
+			}
+		}
+		
+		for (int a = 0; a <= optimalMessageAmount; a++) {
+			VectoralProperty jamProperty = pTemplate.clone();
+			jamProperty.setGaussianWithAccuracy(pNewValue, accuracy);
+
+			TemporalDependencyMatrix temporalDependencyMatrix = jamProperty.getDependencyMatrix();
+			temporalDependencyMatrix = temporalDependencyMatrix.age((long) (a * rate));
+			double impact = calculateImpact(errorProbability, pNumberOfMessages, pNumberOfMessages - a, b);
+
+			if (Double.isNaN(impact)) {
+				return null;
+			}
+
+			temporalDependencyMatrix = modifyDependencyMatrix(temporalDependencyMatrix, impact);
+			jamProperty = (VectoralProperty) jamProperty.age(1, temporalDependencyMatrix);
+
+			if (currentProperty != null) {
+				currentProperty = (VectoralProperty) currentProperty.combine(jamProperty);
+			} else {
+				currentProperty = jamProperty;
+			}
+		}
+
+		return currentProperty;
+	}
+}

src/de/tud/kom/p2psim/impl/vehicular/caching/invalidation/CacheInvalidationStrategyType.java

+/*
+ * Copyright (c) 2005-2010 KOM – Multimedia Communications Lab
+ *
+ * This file is part of Simonstrator.KOM.
+ *
+ * Simonstrator.KOM 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
+ * any later version.
+ *
+ * PeerfactSim.KOM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with PeerfactSim.KOM.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+package de.tud.kom.p2psim.impl.vehicular.caching.invalidation;
+
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.caching.invalidation.CacheInvalidationStrategy;
+
+public enum CacheInvalidationStrategyType {
+	DEFAULT(DefaultCacheInvalidationStrategy.class), NONE(DefaultCacheInvalidationStrategy.class), TTL(TTLBasedCacheInvalidationStrategy.class);
+
+	private final Class<? extends CacheInvalidationStrategy> replacementStrategy;
+
+	private CacheInvalidationStrategyType(final Class<? extends CacheInvalidationStrategy> replacementStrategy) {
+		this.replacementStrategy = replacementStrategy;
+	}
+
+	public CacheInvalidationStrategy getInvalidationStrategy() {
+		try {
+			return replacementStrategy.newInstance();
+		} catch (InstantiationException | IllegalAccessException e) {
+			throw new AssertionError(e);
+		}
+	}
+}

src/de/tud/kom/p2psim/impl/vehicular/caching/invalidation/DefaultCacheInvalidationStrategy.java

+/*
+ * Copyright (c) 2005-2010 KOM – Multimedia Communications Lab
+ *
+ * This file is part of PeerfactSim.KOM.
+ *
+ * PeerfactSim.KOM 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
+ * any later version.
+ *
+ * PeerfactSim.KOM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with PeerfactSim.KOM.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+package de.tud.kom.p2psim.impl.vehicular.caching.invalidation;
+
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.caching.invalidation.CacheInvalidationStrategy;
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.information.PointInformation;
+
+public class DefaultCacheInvalidationStrategy implements CacheInvalidationStrategy {
+
+	@Override
+	public boolean checkInformation(PointInformation pCachedInformation) {
+		return false;
+	}
+
+}

src/de/tud/kom/p2psim/impl/vehicular/caching/invalidation/TTLBasedCacheInvalidationStrategy.java

+/*
+ * Copyright (c) 2005-2010 KOM – Multimedia Communications Lab
+ *
+ * This file is part of PeerfactSim.KOM.
+ *
+ * PeerfactSim.KOM 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
+ * any later version.
+ *
+ * PeerfactSim.KOM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with PeerfactSim.KOM.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+package de.tud.kom.p2psim.impl.vehicular.caching.invalidation;
+
+import de.tudarmstadt.maki.simonstrator.api.Time;
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.caching.invalidation.CacheInvalidationStrategy;
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.information.AvailableInformationAttributes;
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.information.PointInformation;
+
+public class TTLBasedCacheInvalidationStrategy implements CacheInvalidationStrategy {
+
+	@Override
+	public boolean checkInformation(PointInformation pCachedInformation) {
+		if (!pCachedInformation.hasAttribute(AvailableInformationAttributes.TTL)) {
+			throw new AssertionError("Cannot use TTL caching without TTL set!");
+		}
+
+		return pCachedInformation.getDetectionDate() + (long)pCachedInformation.getAttribute(AvailableInformationAttributes.TTL) <= Time.getCurrentTime();
+	}
+
+}

src/de/tud/kom/p2psim/impl/vehicular/caching/replacement/CacheReplacementStrategyType.java

+/*
+ * Copyright (c) 2005-2010 KOM – Multimedia Communications Lab
+ *
+ * This file is part of Simonstrator.KOM.
+ *
+ * Simonstrator.KOM 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
+ * any later version.
+ *
+ * PeerfactSim.KOM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with PeerfactSim.KOM.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+package de.tud.kom.p2psim.impl.vehicular.caching.replacement;
+
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.caching.replacement.CacheReplacementStrategy;
+
+public enum CacheReplacementStrategyType {
+	DEFAULT(NoCacheReplacementStrategy.class), NONE(NoCacheReplacementStrategy.class), IMMEDIATE(ImmediateCacheReplacementStrategy.class), TTL(TTLbasedCacheReplacementStrategy.class);
+
+	private final Class<? extends CacheReplacementStrategy> replacementStrategy;
+
+	private CacheReplacementStrategyType(final Class<? extends CacheReplacementStrategy> replacementStrategy) {
+		this.replacementStrategy = replacementStrategy;
+	}
+
+	public CacheReplacementStrategy getReplacementStrategy() {
+		try {
+			return replacementStrategy.newInstance();
+		} catch (InstantiationException | IllegalAccessException e) {
+			throw new AssertionError(e);
+		}
+	}
+}

src/de/tud/kom/p2psim/impl/vehicular/caching/replacement/ImmediateCacheReplacementStrategy.java

+/*
+ * Copyright (c) 2005-2010 KOM – Multimedia Communications Lab
+ *
+ * This file is part of PeerfactSim.KOM.
+ *
+ * PeerfactSim.KOM 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
+ * any later version.
+ *
+ * PeerfactSim.KOM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with PeerfactSim.KOM.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+package de.tud.kom.p2psim.impl.vehicular.caching.replacement;
+
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.caching.replacement.CacheReplacementStrategy;
+import de.tudarmstadt.maki.simonstrator.api.component.vehicular.information.PointInformation;
+
+public class ImmediateCacheReplacementStrategy implements CacheReplacementStrategy {
+
+	@Override
+	public boolean replaceInformation(PointInformation pCachedInformation,
+			PointInformation pSensedInformation) {
+		return pSensedInformation.getDetectionDate() > pCachedInformation.getDetectionDate();
+	}
+
+}