Merge branch 'master' of ssh://git@dev.kom.e-technik.tu-darmstadt.de/maki/simonstrator-peerfact.git

src/de/tud/kom/p2psim/impl/topology/placement/JSONPlacement.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.topology.placement;
+
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.util.List;
+import java.util.Vector;
+
+import org.apache.commons.io.IOUtils;
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import de.tud.kom.p2psim.api.topology.TopologyComponent;
+import de.tud.kom.p2psim.api.topology.placement.PlacementModel;
+import de.tud.kom.p2psim.impl.topology.PositionVector;
+import de.tud.kom.p2psim.impl.topology.movement.modularosm.GPSCalculation;
+
+/**
+ * Generates attraction points out of real data from OSM.
+ * 
+ * @author Nils Richerzhagen
+ * @version 1.0, Feb 22, 2016
+ */
+public class JSONPlacement implements PlacementModel {
+
+	private PositionVector worldDimensions;
+	
+	private List<PositionVector> placements;
+	
+	private String placementJsonFile;
+	private double latLeft; //Values from -90 to 90; always smaller than latRight
+	private double latRight; //Values from -90 to 90
+	private double lonLeft; //Values from -180 to 180; Always smaller than lonRight
+	private double lonRight; //Values from -180 to 180
+
+	/**
+	 * You have to set a json-file, which has set some POIs
+	 * Sample-query for "bar"-POIs in Darmstadt (Bounding Box from [49.4813, 8.5590] to [49.9088, 8,7736]:
+		http://overpass-api.de/api/interpreter?data=%5Bout:json%5D;node%5Bamenity=bar%5D%2849%2E4813%2C8%2E5590%2C49%2E9088%2C8%2E7736%29%3Bout%3B	 
+	 */
+	public JSONPlacement() {
+		placements = new Vector<PositionVector>();
+		
+		latLeft = GPSCalculation.getLatLower();
+		latRight = GPSCalculation.getLatUpper();
+		lonLeft = GPSCalculation.getLonLeft();
+		lonRight = GPSCalculation.getLonRight();
+	}
+	
+	/**
+	 * Projects the gps coordinates in the given gps window to the world-coordinates given in world-dimensions
+	 * @param lat
+	 * @param lon
+	 * @return The projected position in world-dimensions
+	 */
+	private PositionVector transformGPSWindowToOwnWorld(double lat, double lon) {
+		double x = worldDimensions.getX() * (lon - lonLeft)/(lonRight - lonLeft);
+		//Invert the y value, because in Java Swing we start drawing in the upper left corner instead in the lower left one
+		double y = worldDimensions.getY() - worldDimensions.getY() * (lat - latLeft)/(latRight - latLeft);
+		return new PositionVector(x, y);
+	}
+	
+	private void getPlacements() {
+		if(placements.size() == 0) {
+			String poiString = "";
+			JSONArray allPOI = null;
+			FileInputStream inputStream;
+			try {
+				inputStream = new FileInputStream(placementJsonFile);
+				poiString = IOUtils.toString(inputStream);
+				JSONObject poiData = new JSONObject(poiString);
+				allPOI = poiData.getJSONArray("elements");
+			} catch (FileNotFoundException e) {
+				e.printStackTrace();
+		    } catch (IOException e) {
+				e.printStackTrace();
+			} catch (JSONException e) {
+				e.printStackTrace();
+			}
+			
+			if(allPOI != null) {
+				for(int i = 0; i < allPOI.length(); i++) {
+					try {
+						String barname = allPOI.getJSONObject(i).getJSONObject("tags").getString("name");
+						double lat = allPOI.getJSONObject(i).getDouble("lat");
+						double lon = allPOI.getJSONObject(i).getDouble("lon");
+						if(lat > latLeft && lat < latRight &&
+								lon > lonLeft && lon < lonRight){
+							placements.add(transformGPSWindowToOwnWorld(lat, lon));
+						}
+					}
+					catch (JSONException e) {
+						//This bar had no name defined, so there was an error. Not so bad
+					}
+				}
+			}
+		}				
+	}
+	
+	public void setPlacementJsonFile(String placementJsonFile) {
+		this.placementJsonFile = placementJsonFile;
+	}
+	
+	
+	@Override
+	public void addComponent(TopologyComponent comp) {
+		if(worldDimensions == null){
+			worldDimensions = comp.getTopology().getWorldDimensions();
+		}
+		getPlacements();
+	}
+
+	@Override
+	public PositionVector place(TopologyComponent comp) {
+		return placements.remove(0);
+	}
+
+}