Mercurial > dive4elements > river
comparison flys-artifacts/src/main/java/de/intevation/flys/utils/EpsilonComparator.java @ 3011:ab81ffd1343e
FixA: Reactivated rewrite of the outlier checks.
flys-artifacts/trunk@4576 c6561f87-3c4e-4783-a992-168aeb5c3f6f
| author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
|---|---|
| date | Mon, 04 Jun 2012 16:44:56 +0000 |
| parents | |
| children | 0330bff1b382 |
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| 3010:05a3fe8800b3 | 3011:ab81ffd1343e |
|---|---|
| 1 package de.intevation.flys.utils; | |
| 2 | |
| 3 import java.io.Serializable; | |
| 4 | |
| 5 import java.util.Comparator; | |
| 6 | |
| 7 public class EpsilonComparator | |
| 8 implements Serializable, Comparator<Double> | |
| 9 { | |
| 10 public static final double EPSILON = 1e-5; | |
| 11 | |
| 12 public static final EpsilonComparator INSTANCE = | |
| 13 new EpsilonComparator(EPSILON); | |
| 14 | |
| 15 protected double epsilon; | |
| 16 | |
| 17 public EpsilonComparator() { | |
| 18 this(EPSILON); | |
| 19 } | |
| 20 | |
| 21 public EpsilonComparator(double epsilon) { | |
| 22 this.epsilon = Math.abs(epsilon); | |
| 23 } | |
| 24 | |
| 25 private static final double value(Double x) { | |
| 26 return x != null ? x.doubleValue() : 0.0; | |
| 27 } | |
| 28 | |
| 29 @Override | |
| 30 public int compare(Double a, Double b) { | |
| 31 double diff = value(a) - value(b); | |
| 32 if (diff < epsilon) return -1; | |
| 33 return diff > epsilon ? +1 : 0; | |
| 34 } | |
| 35 } | |
| 36 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |