Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/utils/KMIndex.java @ 4269:0c766c475805

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Add Panel and Tree UI classes for dispayling the measurement station info The new ui classes are using the new extracted base class InfoPanel and InfoTree which are in common with the gauge info.
author Björn Ricks <bjoern.ricks@intevation.de>
date Fri, 26 Oct 2012 12:22:06 +0200
parents 0e8929d5e9e3
children 46511b4d8357
rev   line source
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ba62c1751f07 FixA: Added new serializable km inedx structure.
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1 package de.intevation.flys.utils;
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2
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3 import java.util.ArrayList;
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4 import java.util.Collections;
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5 import java.util.List;
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6 import java.util.Iterator;
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7
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8 import java.io.Serializable;
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9
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10 public class KMIndex<A>
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11 implements Serializable, Iterable<KMIndex.Entry<A>>
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12 {
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13 public static final double EPSILON = 1e-4;
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14
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15 public static class Entry<A>
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16 implements Serializable, Comparable<Entry<A>>
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17 {
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18 protected double km;
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19 protected A value;
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20
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21 public Entry(double km) {
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22 this.km = km;
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23 }
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24
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25 public Entry(double km, A value) {
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26 this.km = km;
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27 this.value = value;
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28 }
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29
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30 public double getKm() {
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31 return km;
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32 }
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33
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34 public A getValue() {
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35 return value;
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36 }
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37
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38 public void setValue(A value) {
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39 this.value = value;
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40 }
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41
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42 @Override
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43 public int compareTo(Entry<A> other) {
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44 double diff = km - other.km;
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45 if (diff < -EPSILON) return -1;
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46 if (diff > +EPSILON) return +1;
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47 return 0;
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48 }
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49
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50 public boolean epsilonEquals(double km) {
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51 return Math.abs(this.km - km) < EPSILON;
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52 }
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53 } // class Entry
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54
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55
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56 protected List<Entry<A>> entries;
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57
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58 public KMIndex() {
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59 this(10);
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60 }
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61
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62 public KMIndex(int capacity) {
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63 entries = new ArrayList<Entry<A>>(capacity);
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64 }
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65
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66 public void add(double km, A value) {
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67 entries.add(new Entry<A>(km, value));
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68 }
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69
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70 public void sort() {
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71 Collections.sort(entries);
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72 }
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73
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74 public Entry<A> search(double km) {
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75 for (Entry<A> entry: entries) {
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76 if (entry.epsilonEquals(km)) {
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77 return entry;
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78 }
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79 }
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80 return null;
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81 }
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82
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83 public Entry<A> binarySearch(double km) {
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84 int index = Collections.binarySearch(entries, new Entry<A>(km));
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85 return index >= 0 ? entries.get(index) : null;
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86 }
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87
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88 public Iterator<Entry<A>> iterator() {
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89 return entries.iterator();
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90 }
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91 }
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92 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org