Mercurial > dive4elements > river

annotate gwt-client/src/main/java/org/dive4elements/river/client/shared/DoubleUtils.java @ 5861:172338b1407f

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GWT client: Added copyright header.
author Sascha L. Teichmann <teichmann@intevation.de>
date Sun, 28 Apr 2013 14:30:15 +0200
parents 5aa05a7a34b7
children ea9eef426962
rev   line source
5861
172338b1407f GWT client: Added copyright header.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 5838
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU AGPL (>=v3)
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the
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6 * documentation coming with Dive4Elements River for details.
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7 */
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8
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9 package org.dive4elements.river.client.shared;
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10
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11
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12 public final class DoubleUtils {
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13
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14 public static final String DEFAULT_DELIM = " ";
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16
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17 private DoubleUtils() {
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18 }
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20
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21 public static Double getDouble(String value) {
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22 try {
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23 return Double.valueOf(value);
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24 }
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25 catch (NumberFormatException nfe) {
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26 // do nothing
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27 }
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28
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29 return null;
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30 }
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32
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33 public static double[] getMinMax(String value) {
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34 return getMinMax(value, DEFAULT_DELIM);
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35 }
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38 public static double[] getMinMax(String value, String delim) {
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39 if (value == null) {
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40 return null;
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41 }
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42
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43 String[] values = value.split(delim);
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44
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45 int len = values != null ? values.length : 0;
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46 double[] mm = new double[] { Double.MAX_VALUE, -Double.MAX_VALUE };
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47
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48 for (int i = 0; i < len; i++) {
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49 Double d = getDouble(values[i]);
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50
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51 if (d != null) {
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52 mm[0] = mm[0] < d ? mm[0] : d;
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53 mm[1] = mm[1] > d ? mm[1] : d;
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54 }
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55 }
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56
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57 return mm[0] != Double.MAX_VALUE && mm[1] != -Double.MAX_VALUE
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58 ? mm
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59 : null;
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60 }
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61
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62 /** toIndex is not inclusive, fromIndex is. */
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63 static void fill(double[] array, int fromIndex, int toIndex, double val) {
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64 for (int i = fromIndex; i < toIndex; i++) {
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65 array[i] = val;
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66 }
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67 }
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68
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69 /** @see java.util.Arrays.copyOf */
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70 public static double[] copyOf(double[] toCopy, int newLen) {
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71 double[] nArray = new double[newLen];
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72
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73 if (toCopy == null) {
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74 fill(nArray, 0, nArray.length, 0d);
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75 return nArray;
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76 }
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77
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78 int goTo = (newLen < toCopy.length)
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79 ? newLen
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80 : toCopy.length;
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81
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82 for (int i = 0; i < goTo; i++) {
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83 nArray[i] = toCopy[i];
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84 }
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85 fill (nArray, goTo, nArray.length, 0d);
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86 return nArray;
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87 }
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88 }
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89 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org