Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/themes/ThemeFactory.java @ 5818:a4ff4167be1e

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Request feature info on all layers and show it as html if the server does not return valid gml. Non queryable layers produce an error message when the request fails. This is good enough
author Andre Heinecke <aheinecke@intevation.de>
date Wed, 24 Apr 2013 17:33:27 +0200
parents a5f65e8983be
children
rev   line source
340
b36fd8f21e6a Implementation of interfaces and its default implementations and a factory to work with themes.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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1 package de.intevation.flys.themes;
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2
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3 import de.intevation.artifacts.common.utils.XMLUtils;
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4 import de.intevation.flys.artifacts.FLYSArtifact;
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5 import de.intevation.flys.artifacts.context.FLYSContext;
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6
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7 import java.util.ArrayList;
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8 import java.util.HashMap;
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9 import java.util.List;
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10 import java.util.Map;
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11
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12 import javax.xml.xpath.XPathConstants;
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13
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14 import org.apache.log4j.Logger;
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15 import org.w3c.dom.Document;
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16 import org.w3c.dom.Element;
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17 import org.w3c.dom.NamedNodeMap;
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18 import org.w3c.dom.Node;
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19 import org.w3c.dom.NodeList;
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20
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21 /**
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22 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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23 *
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24 * Mapping-matching rules:
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25 *
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26 */
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27 public class ThemeFactory {
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28
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29 private static Logger logger = Logger.getLogger(ThemeFactory.class);
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31 /** Trivial, hidden constructor. */
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32 private ThemeFactory() {
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33 }
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34
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35
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36 /**
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37 * Creates a new theme from <i>config</i>.
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38 *
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39 * @param themeCfg The theme config document that is used to fetch parent
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40 * themes.
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41 * @param config The theme config node.
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42 *
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43 * @return a new theme.
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44 */
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45 public static Theme createTheme(Document themeCfg, Node config) {
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46 String name = getName(config);
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47 String desc = getDescription(config);
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48
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49 logger.debug("Create new theme: " + name);
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50
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51 Theme theme = new DefaultTheme(name, desc);
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52
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53 parseInherits(themeCfg, config, theme);
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54 parseFields(config, theme);
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55 parseAttrs(config, theme);
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56
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57 return theme;
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58 }
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59
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60
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61 /**
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62 * Get first matching theme for facet.
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63 *
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64 * @param name Name to match "from" of theme mapping.
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65 * @param pattern String to 'compare' to pattern in mapping.
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66 * @param output Name of the current output
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67 *
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68 * @return First matching theme.
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69 */
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70 public static Theme getTheme(
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71 FLYSContext c,
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72 String name,
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73 String pattern,
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74 String output,
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75 String groupName)
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76 {
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77 if (logger.isDebugEnabled()) {
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78 logger.debug(
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79 "Search theme for: " + name + " - pattern: " + pattern);
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80 }
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81
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82 if (c == null || name == null) {
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83 logger.warn("Cannot search for theme.");
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84 return null;
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85 }
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86
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87 // Fetch mapping and themes.
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88 @SuppressWarnings("unchecked")
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89 Map<String, List<ThemeMapping>> map = (Map<String, List<ThemeMapping>>)
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90 c.get(FLYSContext.THEME_MAPPING);
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91
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92 @SuppressWarnings("unchecked")
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93 List<ThemeGroup> tgs = (List<ThemeGroup>)
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94 c.get(FLYSContext.THEMES);
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95
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96 ThemeGroup group = null;
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97 for (ThemeGroup tg: tgs) {
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98 if (tg.getName().equals(groupName)) {
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99 group = tg;
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100 break;
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101 }
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102 }
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103
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104 if (group == null) {
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105 logger.warn("No theme group found: '" + groupName + "'");
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106 return null;
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107 }
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108
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109 Map<String, Theme> t = group.getThemes();
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110
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111 FLYSArtifact artifact = (FLYSArtifact) c.get(FLYSContext.ARTIFACT_KEY);
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112
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113 if (map == null || map.isEmpty() || t == null || t.isEmpty()) {
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114 logger.warn("No mappings or themes found. Cannot retrieve theme!");
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115 return null;
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116 }
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117
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118 List<ThemeMapping> mapping = map.get(name);
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119
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120 if (mapping == null) {
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121 logger.warn("No theme found for mapping: " + name);
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122 return null;
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123 }
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124
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125 // Take first mapping of which all conditions are satisfied.
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126 for (ThemeMapping tm: mapping) {
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127 if (name.equals(tm.getFrom())
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128 && tm.applyPattern(pattern)
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129 && tm.masterAttrMatches(artifact)
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130 && tm.outputMatches(output))
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131 {
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132 String target = tm.getTo();
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133
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134 logger.debug("Found theme '" + target + "'");
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135 return t.get(target);
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136 }
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137 }
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138
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139 String msg =
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140 "No theme found for '" + name +
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141 "' with pattern '" + pattern + "' and output " + output + ".";
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142
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143 logger.warn(msg);
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144
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145 return null;
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146 }
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147
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148
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149 @SuppressWarnings("unchecked")
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150 public static List<ThemeGroup> getThemeGroups(FLYSContext c) {
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151 List<ThemeGroup> tgs = (List<ThemeGroup>)
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152 c.get(FLYSContext.THEMES);
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153 return tgs;
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154 }
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155
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156
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157 @SuppressWarnings("unchecked")
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158 public static List<Theme> getThemes (FLYSContext c, String name) {
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159 List<ThemeGroup> tgs = (List<ThemeGroup>)
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160 c.get(FLYSContext.THEMES);
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161 if (tgs == null) {
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162 return null;
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163 }
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164
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165 List<Theme> themes = new ArrayList<Theme>();
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166 for (ThemeGroup tg: tgs) {
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167 themes.add(tg.getThemeByName(name));
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168 }
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169 return themes;
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170 }
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171
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172 protected static String getName(Node config) {
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173 return ((Element)config).getAttribute("name");
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174 }
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175
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176
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177 protected static String getDescription(Node config) {
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178 return ((Element)config).getAttribute("desc");
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179 }
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180
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181
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182 protected static void parseInherits(Document themeCfg, Node cfg, Theme t) {
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183 parseInherits(themeCfg, cfg, t, null);
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184 }
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185
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186 protected static void parseInherits(
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187 Document themeCfg,
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188 Node cfg,
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189 Theme t,
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190 Map<String, Node> themes
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191 ) {
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192 logger.debug("ThemeFactory.parseInherits");
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193
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194 NodeList inherits = ((Element)cfg).getElementsByTagName("inherit");
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195
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196 int num = inherits.getLength();
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197
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198 if (num == 0) {
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199 logger.debug("Theme does not inherit from other themes.");
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200 return;
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201 }
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202
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203 logger.debug("Theme inherits from " + num + " other themes.");
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204
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205 if (themes == null) {
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206 themes = buildThemeMap(themeCfg);
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207 }
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208
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209 for (int i = 0; i < num; i++) {
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210 Node inherit = inherits.item(i);
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211 String from = ((Element)inherit).getAttribute("from");
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212
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213 Node tmp = themes.get(from);
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214
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215 parseInherits(themeCfg, tmp, t, themes);
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216 parseFields(tmp, t);
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217 }
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218 }
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219
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220 protected static Map<String, Node> buildThemeMap(Document themeCfg) {
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221 Map<String, Node> map = new HashMap<String, Node>();
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222 String xpath = "/themes/themegroup/theme";
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223
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224 NodeList nodes = (NodeList)XMLUtils.xpath(
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225 themeCfg, xpath, XPathConstants.NODESET);
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226
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227 if (nodes != null) {
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228 for (int i = 0, N = nodes.getLength(); i < N; ++i) {
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229 Node node = nodes.item(i);
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230 String name = ((Element)node).getAttribute("name");
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231 map.put(name, node);
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232 }
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233 }
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234 return map;
340
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235 }
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236
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237
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238 protected static void parseFields(Node config, Theme theme) {
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239 if (config == null || theme == null) {
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240 logger.warn("Parsing fields without node or theme is senseless!");
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241 return;
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242 }
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243
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244 NodeList fields = ((Element)config).getElementsByTagName("field");
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245
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246 int num = fields.getLength();
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247
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248 logger.debug("Found " + num + " own fields in this theme.");
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249
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250 if (num == 0) {
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251 logger.debug("Theme has no own fields.");
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252 return;
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253 }
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254
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255 for (int i = 0; i < num; i++) {
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256 Node field = fields.item(i);
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257
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258 addField(theme, field);
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259 }
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260 }
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261
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262
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263 protected static void addField(Theme theme, Node field) {
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264 String name = ((Element)field).getAttribute("name");
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265
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266 logger.debug("Add field " + name + " to theme " + theme.getName());
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267
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268 NamedNodeMap attrs = field.getAttributes();
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269
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270 int num = attrs != null ? attrs.getLength() : 0;
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271
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272 if (num == 0) {
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273 logger.warn("This field has no attributes.");
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274 return;
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275 }
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276
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277 ThemeField theField = new DefaultThemeField(name);
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278
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279 for (int i = 0; i < num; i++) {
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280 Node attr = attrs.item(i);
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281
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282 String key = attr.getNodeName();
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283 String value = attr.getNodeValue();
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284
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285 theField.setAttribute(key, value);
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286 }
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287
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288 theme.addField(name, theField);
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289 }
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290
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291
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292 protected static void parseAttrs(Node config, Theme theme) {
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293 NamedNodeMap attrs = config.getAttributes();
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294
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295 int num = attrs != null ? attrs.getLength() : 0;
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296
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297 if (num == 0) {
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298 logger.debug("Theme has no attributes set.");
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299 return;
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300 }
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301
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302 for (int i = 0; i < num; i++) {
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303 Node attr = attrs.item(i);
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304
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305 String name = attr.getNodeName();
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306 String value = attr.getNodeValue();
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307
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308 theme.addAttribute(name, value);
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309 }
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310 }
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311 }
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312 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org