Mercurial > dive4elements > river
comparison backend/src/main/java/org/dive4elements/river/importer/ValueKey.java @ 7730:e1b831fe435a slt-simplify-cross-sections
Merged default into slt-simplify-cross-sections branch and updated package and class names.
| author | Tom Gottfried <tom@intevation.de> |
|---|---|
| date | Mon, 20 Jan 2014 14:04:20 +0100 |
| parents | 4c3ccf2b0304 |
| children |
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| 5084:ca45dd039b54 | 7730:e1b831fe435a |
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| 1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde | |
| 2 * Software engineering by Intevation GmbH | |
| 3 * | |
| 4 * This file is Free Software under the GNU AGPL (>=v3) | |
| 5 * and comes with ABSOLUTELY NO WARRANTY! Check out the | |
| 6 * documentation coming with Dive4Elements River for details. | |
| 7 */ | |
| 8 | |
| 9 package org.dive4elements.river.importer; | |
| 10 | |
| 11 import java.math.BigDecimal; | |
| 12 | |
| 13 import java.util.Comparator; | |
| 14 | |
| 15 public class ValueKey | |
| 16 { | |
| 17 public static final double EPSILON = 1e-6; | |
| 18 | |
| 19 public static final Comparator<ValueKey> EPSILON_COMPARATOR = | |
| 20 new Comparator<ValueKey>() | |
| 21 { | |
| 22 public int compare(ValueKey x, ValueKey y) { | |
| 23 int cmp = ValueKey.compare(x.a, y.a); | |
| 24 if (cmp != 0) return cmp; | |
| 25 return ValueKey.compare(x.b, y.b); | |
| 26 } | |
| 27 }; | |
| 28 | |
| 29 public static int compare(BigDecimal a, BigDecimal b) { | |
| 30 if (a == null && b == null) return 0; | |
| 31 if (a != null && b == null) return +1; | |
| 32 if (a == null && b != null) return -1; | |
| 33 | |
| 34 double diff = a.doubleValue() - b.doubleValue(); | |
| 35 if (diff < -EPSILON) return -1; | |
| 36 return diff > EPSILON ? +1 : 0; | |
| 37 } | |
| 38 | |
| 39 protected BigDecimal a; | |
| 40 protected BigDecimal b; | |
| 41 | |
| 42 public ValueKey() { | |
| 43 } | |
| 44 | |
| 45 public ValueKey(BigDecimal a, BigDecimal b) { | |
| 46 this.a = a; | |
| 47 this.b = b; | |
| 48 } | |
| 49 | |
| 50 @Override | |
| 51 public int hashCode() { | |
| 52 return ((a != null ? a.hashCode() : 0) << 16) | |
| 53 | (b != null ? b.hashCode() : 0); | |
| 54 } | |
| 55 | |
| 56 @Override | |
| 57 public boolean equals(Object other) { | |
| 58 if (!(other instanceof ValueKey)) { | |
| 59 return false; | |
| 60 } | |
| 61 ValueKey o = (ValueKey)other; | |
| 62 return !( | |
| 63 (a == null && o.a != null) | |
| 64 || (a != null && o.a == null) | |
| 65 || (a != null && !a.equals(o.a)) | |
| 66 || (b == null && o.b != null) | |
| 67 || (b != null && o.b == null) | |
| 68 || (b != null && !b.equals(o.b))); | |
| 69 } | |
| 70 } | |
| 71 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |