Mercurial > dive4elements > river

annotate flys-client/src/main/java/de/intevation/flys/client/shared/DoubleUtils.java @ 4679:23392c25fc11

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Doc.
author Felix Wolfsteller <felix.wolfsteller@intevation.de>
date Fri, 14 Dec 2012 10:41:42 +0100
parents 51ed89b754ae
children
rev   line source
1279
af6ad7522351 Bugfix: #336 Improved determination of min/max KM values - code moved to ArtifactDescription.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
1 package de.intevation.flys.client.shared;
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2
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3
af6ad7522351 Bugfix: #336 Improved determination of min/max KM values - code moved to ArtifactDescription.
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4 public final class DoubleUtils {
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5
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6 public static final String DEFAULT_DELIM = " ";
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7
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8
af6ad7522351 Bugfix: #336 Improved determination of min/max KM values - code moved to ArtifactDescription.
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9 private DoubleUtils() {
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10 }
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11
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12
af6ad7522351 Bugfix: #336 Improved determination of min/max KM values - code moved to ArtifactDescription.
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13 public static Double getDouble(String value) {
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14 try {
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15 return Double.valueOf(value);
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16 }
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17 catch (NumberFormatException nfe) {
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18 // do nothing
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19 }
af6ad7522351 Bugfix: #336 Improved determination of min/max KM values - code moved to ArtifactDescription.
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20
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21 return null;
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22 }
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23
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24
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25 public static double[] getMinMax(String value) {
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26 return getMinMax(value, DEFAULT_DELIM);
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27 }
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28
af6ad7522351 Bugfix: #336 Improved determination of min/max KM values - code moved to ArtifactDescription.
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29
af6ad7522351 Bugfix: #336 Improved determination of min/max KM values - code moved to ArtifactDescription.
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30 public static double[] getMinMax(String value, String delim) {
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31 if (value == null) {
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32 return null;
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33 }
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34
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35 String[] values = value.split(delim);
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36
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37 int len = values != null ? values.length : 0;
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38 double[] mm = new double[] { Double.MAX_VALUE, -Double.MAX_VALUE };
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39
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40 for (int i = 0; i < len; i++) {
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41 Double d = getDouble(values[i]);
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42
af6ad7522351 Bugfix: #336 Improved determination of min/max KM values - code moved to ArtifactDescription.
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43 if (d != null) {
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44 mm[0] = mm[0] < d ? mm[0] : d;
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45 mm[1] = mm[1] > d ? mm[1] : d;
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46 }
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47 }
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48
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49 return mm[0] != Double.MAX_VALUE && mm[1] != -Double.MAX_VALUE
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50 ? mm
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51 : null;
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52 }
1616
ff8312688cd5 Added utility functions for double arrays.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
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53
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54 /** toIndex is not inclusive, fromIndex is. */
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55 static void fill(double[] array, int fromIndex, int toIndex, double val) {
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56 for (int i = fromIndex; i < toIndex; i++) {
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57 array[i] = val;
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58 }
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59 }
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60
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61 /** @see java.util.Arrays.copyOf */
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62 public static double[] copyOf(double[] toCopy, int newLen) {
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63 double[] nArray = new double[newLen];
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64
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65 if (toCopy == null) {
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66 fill(nArray, 0, nArray.length, 0d);
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67 return nArray;
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68 }
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69
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70 int goTo = (newLen < toCopy.length)
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71 ? newLen
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51ed89b754ae FLYS client: Removed trailing whitespace.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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72 : toCopy.length;
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73
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74 for (int i = 0; i < goTo; i++) {
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75 nArray[i] = toCopy[i];
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76 }
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77 fill (nArray, goTo, nArray.length, 0d);
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78 return nArray;
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79 }
1279
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parents:
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80 }
af6ad7522351 Bugfix: #336 Improved determination of min/max KM values - code moved to ArtifactDescription.
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parents:
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81 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org