Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/utils/FLYSUtils.java @ 1105:adb52a2005e7

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Moved code to extract the river srid defined in the global configuration into FLYSUtils. flys-artifacts/trunk@2608 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Tue, 30 Aug 2011 08:09:52 +0000
parents af73f196eccc
children 7398280b11a0
rev   line source
1095
f465785ed1ae Refactored the code to fetch the km range/locations into a utility class.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
1 package de.intevation.flys.utils;
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2
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3 import java.util.HashMap;
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4 import java.util.Map;
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5
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6 import javax.xml.xpath.XPathConstants;
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parents: 1099
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7
adb52a2005e7 Moved code to extract the river srid defined in the global configuration into FLYSUtils.
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8 import org.w3c.dom.Document;
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9
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10 import gnu.trove.TDoubleArrayList;
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11
1105
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parents: 1099
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12 import de.intevation.artifacts.common.utils.Config;
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13 import de.intevation.artifacts.common.utils.XMLUtils;
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14
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15 import de.intevation.flys.artifacts.FLYSArtifact;
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16 import de.intevation.flys.artifacts.model.RiverFactory;
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17 import de.intevation.flys.model.River;
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18
f465785ed1ae Refactored the code to fetch the km range/locations into a utility class.
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19 public class FLYSUtils {
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20
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21 public static enum KM_MODE { RANGE, LOCATIONS, NONE };
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22
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23 public static final String XPATH_RIVER_PROJECTION =
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24 "/artifact-database/floodmap/river[@name=$name]/srid/@value";
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25
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26
f465785ed1ae Refactored the code to fetch the km range/locations into a utility class.
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27 private FLYSUtils() {
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28 }
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29
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30
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31 public static KM_MODE getKmRangeMode(FLYSArtifact flys) {
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32 String mode = flys.getDataAsString("ld_mode");
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33
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34 if (mode == null || mode.length() == 0) {
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35 return KM_MODE.NONE;
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36 }
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37 else if (mode.equals("distance")) {
f465785ed1ae Refactored the code to fetch the km range/locations into a utility class.
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38 return KM_MODE.RANGE;
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39 }
f465785ed1ae Refactored the code to fetch the km range/locations into a utility class.
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40 else if (mode.equals("locations")) {
f465785ed1ae Refactored the code to fetch the km range/locations into a utility class.
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41 return KM_MODE.LOCATIONS;
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42 }
f465785ed1ae Refactored the code to fetch the km range/locations into a utility class.
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43 else {
f465785ed1ae Refactored the code to fetch the km range/locations into a utility class.
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44 return KM_MODE.NONE;
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45 }
f465785ed1ae Refactored the code to fetch the km range/locations into a utility class.
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46 }
f465785ed1ae Refactored the code to fetch the km range/locations into a utility class.
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47
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48
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49 public static double[] getKmRange(FLYSArtifact flys) {
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50 switch (getKmRangeMode(flys)) {
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51 case RANGE: {
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52 return getKmFromTo(flys);
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53 }
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54
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55 case LOCATIONS: {
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56 double[] locs = getLocations(flys);
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57 return new double[] { locs[0], locs[locs.length-1] };
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58 }
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59
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60 case NONE: {
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61 double[] locs = getLocations(flys);
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62 if (locs != null) {
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63 return new double[] { locs[0], locs[locs.length-1] };
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64 }
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65 else {
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66 return getKmFromTo(flys);
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67 }
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68 }
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69 }
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70
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71 return new double[] { Double.NaN, Double.NaN };
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72 }
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73
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74
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75 public static double[] getKmFromTo(FLYSArtifact flys) {
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76 String strFrom = flys.getDataAsString("ld_from");
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77 String strTo = flys.getDataAsString("ld_to");
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78
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79 if (strFrom == null || strTo == null) {
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80 return null;
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81 }
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82
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83 try {
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84 return new double[] {
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85 Double.parseDouble(strFrom),
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86 Double.parseDouble(strTo) };
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87 }
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88 catch (NumberFormatException nfe) {
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89 return null;
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90 }
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91 }
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92
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93
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94 public static double[] getLocations(FLYSArtifact flys) {
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95 String locationStr = flys.getDataAsString("ld_locations");
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96
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97 if (locationStr == null || locationStr.length() == 0) {
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98 return null;
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99 }
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100
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101 String[] tmp = locationStr.split(" ");
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102 TDoubleArrayList locations = new TDoubleArrayList();
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103
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104 for (String l: tmp) {
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105 try {
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106 locations.add(Double.parseDouble(l));
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107 }
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108 catch (NumberFormatException nfe) {
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109 }
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110 }
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111
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112 locations.sort();
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113
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114 return locations.toNativeArray();
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115 }
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116
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117
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118 /**
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119 * Returns the selected River object based on the 'river' data that might
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120 * have been inserted by the user.
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121 *
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122 * @return the selected River or null if no river has been chosen yet.
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123 */
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124 public static River getRiver(FLYSArtifact flys) {
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125 String sRiver = flys.getDataAsString("river");
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126
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127 return (sRiver != null)
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128 ? RiverFactory.getRiver(sRiver)
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129 : null;
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130 }
1105
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131
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132
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133 /**
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134 * Extracts the SRID defined in the global configuration for the river
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135 * specified in <i>artifact</i>.
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136 *
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137 * @param artifact The FLYSArtifact that stores the name of the river.
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138 *
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139 * @return the SRID as string (e.g. "31466").
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140 */
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141 public static String getRiverSrid(FLYSArtifact artifact) {
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142 String river = artifact.getDataAsString("river");
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143
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144 if (river == null || river.length() == 0) {
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145 return null;
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146 }
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147
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148 Map<String, String> variables = new HashMap<String, String>(1);
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149 variables.put("name", river);
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150
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151 Document cfg = Config.getConfig();
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152
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153 return (String) XMLUtils.xpath(
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154 cfg,
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155 XPATH_RIVER_PROJECTION,
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156 XPathConstants.STRING,
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157 null,
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158 variables);
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159 }
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160 }
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161 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
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