Mercurial > dive4elements > river

annotate flys-backend/src/main/java/de/intevation/flys/importer/ValueKey.java @ 4254:33b15ac17fd1

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Only create and add GaugePanel when necessary The GaugePanel isn't created always and only show if WINFO and a river is selected now. It is only created on demand. Therefore all access to the GaugePanel is abstraced via methods that check if the GaugePanel is null before accessing it's methods.
author Björn Ricks <bjoern.ricks@intevation.de>
date Thu, 25 Oct 2012 13:58:53 +0200
parents 6dc847194625
children
rev   line source
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1 package de.intevation.flys.importer;
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2
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3 import java.math.BigDecimal;
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4
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5 import java.util.Comparator;
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6
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7 public class ValueKey
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8 {
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9 public static final double EPSILON = 1e-6;
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10
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11 public static final Comparator<ValueKey> EPSILON_COMPARATOR =
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12 new Comparator<ValueKey>()
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13 {
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14 public int compare(ValueKey x, ValueKey y) {
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15 int cmp = ValueKey.compare(x.a, y.a);
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16 if (cmp != 0) return cmp;
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17 return ValueKey.compare(x.b, y.b);
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18 }
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19 };
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20
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21 public static int compare(BigDecimal a, BigDecimal b) {
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22 if (a == null && b == null) return 0;
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23 if (a != null && b == null) return +1;
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24 if (a == null && b != null) return -1;
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25
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26 double diff = a.doubleValue() - b.doubleValue();
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27 if (diff < -EPSILON) return -1;
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28 return diff > EPSILON ? +1 : 0;
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29 }
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30
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31 protected BigDecimal a;
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32 protected BigDecimal b;
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33
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34 public ValueKey() {
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35 }
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36
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37 public ValueKey(BigDecimal a, BigDecimal b) {
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38 this.a = a;
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39 this.b = b;
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40 }
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41
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42 @Override
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43 public int hashCode() {
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44 return ((a != null ? a.hashCode() : 0) << 16)
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45 | (b != null ? b.hashCode() : 0);
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46 }
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47
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48 @Override
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49 public boolean equals(Object other) {
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50 if (!(other instanceof ValueKey)) {
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51 return false;
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52 }
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53 ValueKey o = (ValueKey)other;
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54 return !(
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55 (a == null && o.a != null)
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56 || (a != null && o.a == null)
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57 || (a != null && !a.equals(o.a))
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58 || (b == null && o.b != null)
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59 || (b != null && o.b == null)
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60 || (b != null && !b.equals(o.b)));
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61 }
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62 }
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63 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org