Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/ZoomScale.java @ 4771:e21acb4f5c62

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Simplified code.
author Sascha L. Teichmann <teichmann@intevation.de>
date Sat, 05 Jan 2013 12:13:16 +0100
parents e8c6fbed889b
children
rev   line source
4618
e8c6fbed889b New class storing configuration about zoom dependent filter levels.
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1 package de.intevation.flys.artifacts.model;
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2
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3 import java.util.HashMap;
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4 import java.util.Map;
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5 import java.util.Set;
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6 import java.util.TreeMap;
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7
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8 import org.apache.log4j.Logger;
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9
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10 import de.intevation.flys.artifacts.math.Linear;
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11
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12
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13 public class ZoomScale
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14 {
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15 private static Logger logger = Logger.getLogger(ZoomScale.class);
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16
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17 private HashMap<String, TreeMap<Double, Double>> rivers;
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18
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19 public ZoomScale() {
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20 this.rivers = new HashMap<String, TreeMap<Double, Double>>();
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21 }
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22
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23 public ZoomScale(String river) {
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24 this();
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25 rivers.put(river, new TreeMap<Double, Double>());
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26 }
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27
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28 public double getRadius(String river, double lower, double upper) {
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29 double range = Math.abs(upper) - Math.abs(lower);
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30 TreeMap<Double, Double> ranges = rivers.get(river);
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31 if (ranges == null) {
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32 return 0.001;
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33 }
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34 Map.Entry<Double, Double> next = ranges.higherEntry(range);
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35 Map.Entry<Double, Double> prev = ranges.lowerEntry(range);
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36 double x0 = 0d;
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37 double x1 = 0d;
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38 double y0 = 0d;
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39 double y1 = 0d;
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40 if (prev == null && next != null) {
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41 x1 = next.getKey();
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42 y1 = next.getValue();
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43 }
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44 else if (prev != null && next == null) {
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45 return prev.getValue();
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46 }
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47 else {
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48 x0 = prev.getKey();
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49 x1 = next.getKey();
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50 y0 = prev.getValue();
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51 y1 = next.getValue();
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52 }
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53 return Linear.linear(range, x0, x1, y0, y1);
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54 }
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55
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56 public void addRiver(String river) {
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57 if (!this.rivers.containsKey(river)) {
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58 this.rivers.put(river, new TreeMap<Double, Double>());
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59 }
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60 }
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61
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62 public Set<String> getRivers() {
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63 return this.rivers.keySet();
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64 }
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65
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66 public void addRange(String river, double range, double radius) {
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67 if (this.rivers.containsKey(river)) {
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68 this.rivers.get(river).put(range, radius);
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69 }
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70 else {
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71 this.rivers.put(river, new TreeMap<Double, Double>());
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72 this.rivers.get(river).put(range, radius);
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73 }
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74 }
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75 }
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