Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/WMSDBArtifact.java @ 2740:64dc2997b2dd

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Refactor static xpath, other artifacts will come in a later commit. flys-artifacts/trunk@4474 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Felix Wolfsteller <felix.wolfsteller@intevation.de>
date Wed, 23 May 2012 10:04:11 +0000
parents f5af3adb3b95
children 0251393f037c
rev   line source
1805
5e9696c32f04 Added datacage config and loaders for KM WMS layer in floodmaps.
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1 package de.intevation.flys.artifacts;
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2
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3 import java.util.ArrayList;
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4 import java.util.List;
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5
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6 import java.util.regex.Pattern;
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7 import java.util.regex.Matcher;
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8
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9 import org.w3c.dom.Document;
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10
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11 import org.apache.log4j.Logger;
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12
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13 import org.hibernate.impl.SessionFactoryImpl;
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14
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15 import com.vividsolutions.jts.geom.Envelope;
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16
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17 import de.intevation.artifacts.Artifact;
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18 import de.intevation.artifacts.ArtifactFactory;
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19 import de.intevation.artifacts.CallMeta;
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20
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21 import de.intevation.artifactdatabase.data.DefaultStateData;
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22 import de.intevation.artifactdatabase.state.Facet;
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23 import de.intevation.artifactdatabase.state.State;
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24
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25 import de.intevation.artifacts.common.ArtifactNamespaceContext;
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26 import de.intevation.artifacts.common.utils.XMLUtils;
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27
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28 import de.intevation.flys.backend.SessionFactoryProvider;
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29
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30 import de.intevation.flys.artifacts.resources.Resources;
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31 import de.intevation.flys.artifacts.states.DefaultState;
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32 import de.intevation.flys.artifacts.model.WMSDBLayerFacet;
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33 import de.intevation.flys.utils.FLYSUtils;
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34
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35
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36 public abstract class WMSDBArtifact extends StaticFLYSArtifact {
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37
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38 private static final Logger logger = Logger.getLogger(WMSDBArtifact.class);
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39
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40 public static final Pattern DB_URL_PATTERN =
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41 Pattern.compile("(.*)\\/\\/(.*):([0-9]+)\\/([a-zA-Z]+)");
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42
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43
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44 @Override
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45 public void setup(
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46 String identifier,
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47 ArtifactFactory factory,
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48 Object context,
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49 CallMeta callMeta,
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50 Document data)
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51 {
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52 logger.debug("WMSDBArtifact.setup");
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53
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54 super.setup(identifier, factory, context, callMeta, data);
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55
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56 String ids = XMLUtils.xpathString(
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57 data, XPATH_IDS, ArtifactNamespaceContext.INSTANCE);
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58
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59 if (ids != null && ids.length() > 0) {
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60 addData("ids", new DefaultStateData("ids", null, null, ids));
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61 }
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62 else {
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63 throw new IllegalArgumentException("No attribute 'ids' found!");
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64 }
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65
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66 List<Facet> fs = new ArrayList<Facet>();
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67
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68 WMSDBState state = (WMSDBState) getCurrentState(context);
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69 state.computeInit(this, hash(), context, callMeta, fs);
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70
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71 if (!fs.isEmpty()) {
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72 facets.put(getCurrentStateId(), fs);
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73 }
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74 }
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75
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76
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77 @Override
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78 protected void initialize(
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79 Artifact artifact,
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80 Object context,
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81 CallMeta callMeta)
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82 {
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83 // do nothing
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84 }
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85
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86
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87 /**
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88 * Get a list containing the one and only State.
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89 * @param context ignored.
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90 * @return list with one and only state.
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91 */
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92 @Override
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93 protected List<State> getStates(Object context) {
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94 ArrayList<State> states = new ArrayList<State>();
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95 states.add(getCurrentState(context));
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96
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97 return states;
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98 }
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99
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100
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101
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102 public static abstract class WMSDBState extends DefaultState {
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103 private static final Logger logger = Logger.getLogger(WMSDBState.class);
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104
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105 protected FLYSArtifact artifact;
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106
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107 protected String name;
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108 protected int riverId;
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109
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110
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111 public WMSDBState() {}
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112
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113 public WMSDBState(FLYSArtifact artifact) {
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114 this.artifact = artifact;
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115 this.name = null;
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116 this.riverId = 0;
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117 }
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118
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119 @Override
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120 public Object computeInit(
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121 FLYSArtifact artifact,
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122 String hash,
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123 Object context,
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124 CallMeta meta,
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125 List<Facet> facets
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126 ) {
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127 logger.debug("WMSDBState.computeInit");
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128
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129 String type = getFacetType();
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130
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131 WMSDBLayerFacet facet = new WMSDBLayerFacet(
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132 0,
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133 type,
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134 getTitle(meta),
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135 ComputeType.INIT,
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136 getID(), hash,
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137 getUrl());
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138
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139 String name = type + "-" + artifact.identifier();
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140
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141 facet.addLayer(name);
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142 facet.setExtent(getExtent());
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143 facet.setSrid(getSrid());
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144 facet.setData(getDataString());
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145 facet.setFilter(getFilter());
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146 facet.setGeometryType(getGeometryType());
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147 facet.setConnection(getConnection());
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148 facet.setConnectionType(getConnectionType());
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149 facet.setLabelItem(getLabelItem());
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150
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151 facets.add(facet);
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152
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153 return null;
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154 }
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155
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156 /**
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157 * This method returns a connection string for databases used by
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158 * Mapserver's Mapfile.
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159 *
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160 * @return A connection string for Mapserver.
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161 */
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162 protected String getConnection() {
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163 SessionFactoryImpl sf = (SessionFactoryImpl)
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164 SessionFactoryProvider.getSessionFactory();
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165
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166 String user = SessionFactoryProvider.getUser(sf);
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167 String pass = SessionFactoryProvider.getPass(sf);
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168 String url = SessionFactoryProvider.getURL(sf);
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169
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170 logger.debug("Parse connection url: " + url);
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171
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172 Matcher m = DB_URL_PATTERN.matcher(url);
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173 if (!m.matches()) {
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174 logger.warn("Could not parse Connection string.");
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175 return null;
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176 }
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177
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178 logger.debug("Groups for connection string: " + m.groupCount());
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179 int groups = m.groupCount();
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180
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181 for (int i = 0; i <= m.groupCount(); i++) {
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182 logger.debug("Group " + i + ": " + m.group(i));
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183 }
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184
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185 String connection = null;
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186
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187 if (FLYSUtils.isUsingOracle()) {
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188 if (groups < 3) {
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189 logger.warn("Could only partially parse connection string.");
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190 return null;
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191 }
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192
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193 String host = m.group(2);
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194 String port = m.group(3);
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195
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196 connection = user + "/" + pass + "@" + host;
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197 }
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198 else {
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199 if (groups < 4) {
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200 logger.warn("Could only partially parse connection string.");
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201 return null;
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202 }
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203
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204 String host = m.group(2);
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205 String port = m.group(3);
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206 String db = m.group(4);
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207
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208 StringBuilder sb = new StringBuilder();
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209 sb.append("dbname=" + db);
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210 sb.append("host='" + host + "'");
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211 sb.append("port=" + port);
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212 sb.append("password='" + pass + "'");
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213 sb.append("sslmode=disable");
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214
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215 connection = sb.toString();
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216 }
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217
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218 logger.debug("Created connection: '" + connection + "'");
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219
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220 return connection;
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221 }
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222
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223 protected String getConnectionType() {
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224 return FLYSUtils.isUsingOracle() ? "oraclespatial" : "postgis";
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225 }
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226
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227 protected String getLabelItem() {
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228 return null;
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229 }
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230
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231 public int getRiverId() {
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232 if (riverId == 0) {
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233 String ids = artifact.getDataAsString("ids");
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234 String[] parts = ids.split(";");
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235
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236 try {
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237 riverId = Integer.valueOf(parts[0]);
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238 }
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239 catch (NumberFormatException nfe) {
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240 logger.error("Cannot parse river id from '" + parts[0] + "'");
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241 }
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242 }
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243
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244 return riverId;
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245 }
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246
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247 /**
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248 * Returns the name of the WMS layer. This method extracts the name
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249 * from 'ids' data string. It is expected, that the 'ids' string is
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250 * seperated by ';' and that the name is placed at index 1.
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251 *
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252 * @return the name of the WMS layer.
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253 */
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254 public String getName() {
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255 if (name == null) {
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256 String ids = artifact.getDataAsString("ids");
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257
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258 String parts[] = ids != null ? ids.split(";") : null;
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259
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260 if (parts != null && parts.length >= 2) {
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261 name = parts[1];
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262 }
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263 }
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264
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265 return name;
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266 }
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267
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268
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269 /**
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270 * Returns the name of the layer (returned by getName()) or the layer
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271 * type if the name is empty. The layer type is created by an i18n
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272 * string of getFacetType().
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273 *
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274 * @param meta A CallMeta used for i18n.
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275 *
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276 * @return the name of the layer or its type if name is empty.
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277 */
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278 protected String getTitle(CallMeta meta) {
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279 String name = getName();
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280
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281 return name != null && name.length() > 0
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282 ? name
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283 : Resources.getMsg(
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284 meta,
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285 getFacetType(),
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286 getFacetType());
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287 }
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288
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289
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290 protected abstract String getFacetType();
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291
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292 protected abstract String getUrl();
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293
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294 protected abstract String getSrid();
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295
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296 protected abstract Envelope getExtent();
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297
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298 protected abstract String getFilter();
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299
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300 protected abstract String getDataString();
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301
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302 protected abstract String getGeometryType();
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303 } // end of WMSDBState
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304 }
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305 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org