Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/access/RangeAccess.java @ 5779:ebec12def170

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Datacage: Add a pool of builders to make it multi threadable. XML DOM is not thread safe. Therefore the old implementation only allowed one thread to use the builder at a time. As the complexity of the configuration has increased over time this has become a bottleneck of the whole application because it took quiet some time to build a result. Furthermore the builder code path is visited very frequent. So many concurrent requests were piled up resulting in long waits for the users. To mitigate this problem a round robin pool of builders is used now. Each of the pooled builders has an independent copy of the XML template and can be run in parallel. The number of builders is determined by the system property 'flys.datacage.pool.size'. It defaults to 4.
author Sascha L. Teichmann <teichmann@intevation.de>
date Sun, 21 Apr 2013 12:48:09 +0200
parents 3b12c890b0b2
children
rev   line source
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1 package de.intevation.flys.artifacts.access;
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2
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3 import org.apache.log4j.Logger;
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4
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5 import gnu.trove.TDoubleArrayList;
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6 import de.intevation.artifacts.CallContext;
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7 import de.intevation.flys.artifacts.FLYSArtifact;
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8 import de.intevation.flys.artifacts.WINFOArtifact;
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9
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10 import de.intevation.flys.utils.FLYSUtils;
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11
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12
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13 /** For the moment, light-weight wrapper around FLYSUtils. */
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14 // TODO employ 'Caching' like other Accesses, remove usage of FLYSUtils.
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15 public class RangeAccess
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16 extends RiverAccess
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17 {
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18 private static Logger logger = Logger.getLogger(RangeAccess.class);
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19
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20 private CallContext context;
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21
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22 public static enum KM_MODE { RANGE, LOCATIONS, NONE };
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23
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24 double[] kmRange;
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26 Double from;
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28 Double to;
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29
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30 Double step;
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31
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32 private KM_MODE mode;
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33
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34
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35 public RangeAccess(FLYSArtifact artifact, CallContext context) {
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36 super(artifact);
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37 this.context = context;
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38 }
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39
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40
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41 /** Evaluate the ld_mode data of artifact. */
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42 public KM_MODE getKmRangeMode() {
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43 if (mode != null) {
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44 return mode;
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45 }
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46 String modeData = getString("ld_mode");
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47
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48 if (modeData == null || modeData.length() == 0) {
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49 mode = KM_MODE.NONE;
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50 }
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51 else if (modeData.equals("distance")) {
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52 mode = KM_MODE.RANGE;
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53 }
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54 else if (modeData.equals("locations")) {
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55 mode = KM_MODE.LOCATIONS;
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56 }
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57 else {
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58 mode = KM_MODE.NONE;
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59 }
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60
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61 return mode;
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62 }
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63
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64 /**
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65 * Return sorted array of locations at which stuff was calculated
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66 * (from ld_locations data), null if not parameterized this way.
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67 */
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68 public double[] getLocations() {
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69 String locationStr = getString("ld_locations");
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70
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71 if (locationStr == null || locationStr.length() == 0) {
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72 if (getArtifact() instanceof WINFOArtifact) {
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73 WINFOArtifact winfo = (WINFOArtifact) getArtifact();
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74 if (winfo.getReferenceStartKm() != null && winfo.getReferenceEndKms() != null) {
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75 return new double[]
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76 {
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77 winfo.getReferenceStartKm().doubleValue(),
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78 winfo.getReferenceEndKms()[0]
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79 };
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80 }
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81 else if (winfo.getReferenceStartKm() != null) {
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82 return new double[]
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83 {
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84 winfo.getReferenceStartKm().doubleValue(),
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85 winfo.getReferenceStartKm().doubleValue()
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86 };
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87 }
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88 }
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89 return null;
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90 }
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91
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92 String[] tmp = locationStr.split(" ");
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93 TDoubleArrayList locations = new TDoubleArrayList();
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94
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95 for (String l: tmp) {
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96 try {
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97 locations.add(Double.parseDouble(l));
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98 }
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99 catch (NumberFormatException nfe) {
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100 logger.debug(nfe.getLocalizedMessage(), nfe);
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101 }
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102 }
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103
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104 locations.sort();
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105
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106 return locations.toNativeArray();
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107 }
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108
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109
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110 /** Return ld_from data (in km). */
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111 public double getFrom() {
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112 if (from == null) {
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113 from = getDouble("ld_from");
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114 }
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115
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116 if (logger.isDebugEnabled()) {
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117 logger.debug("from: '" + from + "'");
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118 }
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119
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120 return from.doubleValue();
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121 }
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122
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123
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124 /** Return ld_to data (in km). */
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d5d2faf14522 BedHeightQualityAccess, RangeAccess: Refactored, moved getFrom/To to RangeAccess.
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125 public double getTo() {
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126 if (to == null) {
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127 to = getDouble("ld_to");
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128 }
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129
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130 if (logger.isDebugEnabled()) {
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131 logger.debug("to: '" + to + "'");
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132 }
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133
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134 return to.doubleValue();
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135 }
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136
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137
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138 /** Step width for calculation. */
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139 public Double getStep() {
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140
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141 if (step == null) {
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142 step = getDouble("ld_step");
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143 }
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144
f8217f1fef2e ExtremeAccess, RangeAccess and callers: Refactored, moved getStep to RangeAccess.
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145 if (logger.isDebugEnabled()) {
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146 logger.debug("step: '" + step + "'");
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147 }
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148
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149 return step;
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150 }
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151
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152
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153 /**
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154 * Get min and max kilometer, independent of parametization
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155 * (ld_from/to vs ld_locations).
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156 */
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157 public double[] getKmRange() {
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a0949259181e RangeAccess.getKmRange: Extracted from FLYSUtils.
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158 // TODO store kmRange in field.
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159 switch (getKmRangeMode()) {
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160 case RANGE: {
a0949259181e RangeAccess.getKmRange: Extracted from FLYSUtils.
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161 return getKmFromTo();
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162 }
a0949259181e RangeAccess.getKmRange: Extracted from FLYSUtils.
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163
a0949259181e RangeAccess.getKmRange: Extracted from FLYSUtils.
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164 case LOCATIONS: {
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diff changeset
165 double[] locs = getLocations();
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166 // if no locations, nPE.
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diff changeset
167 if (locs == null) {
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diff changeset
168 logger.warn("no locations to get km range from.");
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diff changeset
169 return new double[] { Double.NaN, Double.NaN };
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170 }
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diff changeset
171 return new double[] { locs[0], locs[locs.length-1] };
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172 }
a0949259181e RangeAccess.getKmRange: Extracted from FLYSUtils.
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173
a0949259181e RangeAccess.getKmRange: Extracted from FLYSUtils.
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diff changeset
174 case NONE: {
a0949259181e RangeAccess.getKmRange: Extracted from FLYSUtils.
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diff changeset
175 double[] locs = getLocations();
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diff changeset
176 if (locs != null) {
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diff changeset
177 return new double[] { locs[0], locs[locs.length-1] };
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178 }
a0949259181e RangeAccess.getKmRange: Extracted from FLYSUtils.
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diff changeset
179 else {
a0949259181e RangeAccess.getKmRange: Extracted from FLYSUtils.
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diff changeset
180 return getKmFromTo();
a0949259181e RangeAccess.getKmRange: Extracted from FLYSUtils.
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diff changeset
181 }
a0949259181e RangeAccess.getKmRange: Extracted from FLYSUtils.
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diff changeset
182 }
a0949259181e RangeAccess.getKmRange: Extracted from FLYSUtils.
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diff changeset
183 }
a0949259181e RangeAccess.getKmRange: Extracted from FLYSUtils.
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184
a0949259181e RangeAccess.getKmRange: Extracted from FLYSUtils.
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diff changeset
185 return new double[] { Double.NaN, Double.NaN };
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186 }
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187
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188
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diff changeset
189 public double[] getKmFromTo() {
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diff changeset
190 return FLYSUtils.getKmFromTo(this.getArtifact());
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parents:
diff changeset
191 }
1fea4243721c Add stubs for GaugeAccess and RangeAccess, for they do not get lost.
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diff changeset
192 }
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diff changeset
193 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org