Mercurial > dive4elements > river
annotate artifacts/src/main/java/org/dive4elements/river/artifacts/ExternalWMSArtifact.java @ 8659:af415396d9ca
(issue1803) Use MD5 instead of a homegrown hashing algorithm
For creating a digest of the parametrization we should use an
algorithm that does not create collisions if there are small changes
in the parametrization so that wrong results are returned.
author | Andre Heinecke <andre.heinecke@intevation.de> |
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date | Thu, 02 Apr 2015 17:40:18 +0200 |
parents | e4606eae8ea5 |
children | 0a5239a1e46e |
rev | line source |
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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.artifacts; |
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10 |
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11 import java.util.ArrayList; |
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12 import java.util.List; |
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13 |
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14 import org.apache.log4j.Logger; |
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15 |
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16 import org.w3c.dom.Document; |
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17 |
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18 import org.dive4elements.artifacts.Artifact; |
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19 import org.dive4elements.artifacts.ArtifactFactory; |
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20 import org.dive4elements.artifacts.CallMeta; |
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21 |
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22 import org.dive4elements.artifactdatabase.state.DefaultOutput; |
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23 import org.dive4elements.artifactdatabase.state.Facet; |
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24 import org.dive4elements.artifactdatabase.state.State; |
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25 |
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26 import org.dive4elements.river.artifacts.states.WMSBackgroundState; |
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27 |
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28 |
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29 public class ExternalWMSArtifact extends StaticD4EArtifact { |
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30 |
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31 public static final String NAME = "external_wms"; |
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32 |
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33 private static final Logger log = |
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34 Logger.getLogger(ExternalWMSArtifact.class); |
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35 |
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36 |
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37 @Override |
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38 public String getName() { |
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39 return NAME; |
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40 } |
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41 |
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42 |
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43 @Override |
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44 public void setup( |
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45 String identifier, |
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46 ArtifactFactory factory, |
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47 Object context, |
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48 CallMeta callMeta, |
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49 Document data, |
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50 List<Class> loadFacets) |
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51 { |
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52 log.info("ExternalWMSArtifact.setup"); |
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53 |
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54 super.setup(identifier, factory, context, callMeta, data, loadFacets); |
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55 |
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56 String ids = getDatacageIDValue(data); |
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57 |
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58 if (ids != null && ids.length() > 0) { |
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59 addStringData("ids", ids); |
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60 } |
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61 else { |
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62 throw new IllegalArgumentException("No attribute 'ids' found!"); |
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63 } |
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64 |
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65 List<Facet> fs = new ArrayList<Facet>(); |
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66 |
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67 WMSBackgroundState s = (WMSBackgroundState) getCurrentState(context); |
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68 s.computeInit(this, hash(), context, callMeta, fs); |
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69 |
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70 if (!fs.isEmpty()) { |
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71 addFacets(getCurrentStateId(), fs); |
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72 } |
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73 } |
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74 |
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75 |
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76 @Override |
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77 protected void initialize( |
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78 Artifact artifact, |
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79 Object context, |
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80 CallMeta callMeta) |
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81 { |
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82 // do nothing |
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83 } |
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84 |
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85 |
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86 @Override |
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87 public State getCurrentState(Object cc) { |
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88 State s = new ExternalWMSState(this); |
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89 |
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90 List<Facet> fs = getFacets(getCurrentStateId()); |
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91 |
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92 DefaultOutput o = new DefaultOutput( |
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93 "floodmap", |
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94 "floodmap", |
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95 "image/png", |
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96 fs, |
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97 "map"); |
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98 |
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99 s.getOutputs().add(o); |
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100 |
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101 return s; |
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102 } |
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103 |
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104 |
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105 /** |
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106 * Get a list containing the one and only State. |
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107 * @param context ignored. |
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108 * @return list with one and only state. |
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109 */ |
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110 @Override |
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111 protected List<State> getStates(Object context) { |
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112 ArrayList<State> states = new ArrayList<State>(); |
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113 states.add(getCurrentState(context)); |
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114 |
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115 return states; |
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116 } |
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117 |
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118 |
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119 public static class ExternalWMSState extends WMSBackgroundState { |
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120 |
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121 protected ExternalWMSArtifact artifact; |
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122 |
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123 protected String ids; |
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124 |
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125 |
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126 public ExternalWMSState(ExternalWMSArtifact artifact) { |
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127 super(); |
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128 this.artifact = artifact; |
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129 } |
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130 |
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131 protected String getIds() { |
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132 if (ids == null || ids.length() == 0) { |
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133 ids = artifact.getDataAsString("ids"); |
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134 } |
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135 |
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136 return ids; |
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137 } |
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138 |
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139 @Override |
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140 protected String getFacetType() { |
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141 return FLOODMAP_EXTERNAL_WMS; |
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142 } |
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143 |
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144 @Override |
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145 protected String getSrid() { |
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146 return ""; |
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147 } |
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148 |
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149 @Override |
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150 protected String getUrl() { |
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151 String ids = getIds(); |
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152 String[] parts = ids.split(";"); |
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153 |
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154 return parts[0]; |
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155 } |
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156 |
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157 @Override |
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158 protected String getLayer() { |
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159 String ids = getIds(); |
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160 String[] parts = ids.split(";"); |
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161 |
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162 return parts[1]; |
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163 } |
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164 |
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165 @Override |
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166 protected String getTitle(CallMeta meta) { |
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167 String ids = getIds(); |
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168 String[] parts = ids.split(";"); |
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169 |
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170 return parts[2]; |
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171 } |
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172 } // end of class ExternalWMSState |
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173 } |
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174 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |