Mercurial > dive4elements > river
comparison flys-backend/src/main/java/de/intevation/flys/utils/EpsilonComparator.java @ 4735:94b39073f0f7
Moved EpsilonComparator to utils package becaus its not only useful for TIM parsing. Used EpsilonComparator in DA60 and DA66 case. Maybe TODO: Use in PRF, too.
| author | Sascha L. Teichmann <teichmann@intevation.de> |
|---|---|
| date | Tue, 01 Jan 2013 13:54:08 +0100 |
| parents | flys-backend/src/main/java/de/intevation/flys/importer/parsers/tim/EpsilonComparator.java@7fdddc6ba296 |
| children |
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| 4734:0b4e1a493045 | 4735:94b39073f0f7 |
|---|---|
| 1 package de.intevation.flys.utils; | |
| 2 | |
| 3 import java.util.Comparator; | |
| 4 | |
| 5 public class EpsilonComparator implements Comparator<Double> | |
| 6 { | |
| 7 public static final double EPSILON = 1e-4; | |
| 8 | |
| 9 public static final EpsilonComparator CMP = new EpsilonComparator(EPSILON); | |
| 10 | |
| 11 private double epsilon; | |
| 12 | |
| 13 public EpsilonComparator(double epsilon) { | |
| 14 this.epsilon = epsilon; | |
| 15 } | |
| 16 | |
| 17 @Override | |
| 18 public int compare(Double a, Double b) { | |
| 19 double diff = a - b; | |
| 20 if (diff < -epsilon) return -1; | |
| 21 if (diff > epsilon) return +1; | |
| 22 return 0; | |
| 23 } | |
| 24 } | |
| 25 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |