Mercurial > dive4elements > river

annotate flys-backend/src/main/java/de/intevation/flys/importer/ValueKey.java @ 4255:670e98f5a441

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Fixed leak while merging facets. The ThemeList that is used by OutputHelper to sort the Facets for an Output now uses a list to store the ManagedFacets. The correct order is made up by sorting the List using Collections.sort() function of the Java JDK. Therfore, the ManagedFacet class implements the Comparable interface. The return value of its compareTo(other) method depends on the value of the 'position' field.
author Ingo Weinzierl <weinzierl.ingo@googlemail.com>
date Thu, 25 Oct 2012 14:01:46 +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