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annotate flys-artifacts/src/main/java/de/intevation/flys/themes/ThemeFactory.java @ 2737:83b22ccf48da

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Introduced theme groups and added new service to get themes filtered by name. flys-artifacts/trunk@4470 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Raimund Renkert <raimund.renkert@intevation.de>
date Wed, 23 May 2012 08:46:45 +0000
parents 6f047a407f84
children faf73245ec73
rev   line source
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1 package de.intevation.flys.themes;
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2
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3 import java.util.List;
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4 import java.util.Map;
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5 import java.util.ArrayList;
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6 import java.util.HashMap;
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7
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8 import javax.xml.xpath.XPathConstants;
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9
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10 import org.apache.log4j.Logger;
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11
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12 import org.w3c.dom.Document;
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13 import org.w3c.dom.NamedNodeMap;
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14 import org.w3c.dom.Node;
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15 import org.w3c.dom.NodeList;
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16 import org.w3c.dom.Element;
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17
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18 import de.intevation.artifacts.common.utils.XMLUtils;
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19
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20 import de.intevation.flys.artifacts.context.FLYSContext;
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21 import de.intevation.flys.artifacts.FLYSArtifact;
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22
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23 /**
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24 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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25 *
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26 * Mapping-matching rules:
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27 *
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28 */
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29 public class ThemeFactory {
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30
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31 private static Logger logger = Logger.getLogger(ThemeFactory.class);
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32
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33 /** Trivial, hidden constructor. */
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34 private ThemeFactory() {
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35 }
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36
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37
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38 /**
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39 * Creates a new theme from <i>config</i>.
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40 *
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41 * @param themeCfg The theme config document that is used to fetch parent
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42 * themes.
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43 * @param config The theme config node.
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44 *
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45 * @return a new theme.
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46 */
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47 public static Theme createTheme(Document themeCfg, Node config) {
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48 String name = getName(config);
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49 String desc = getDescription(config);
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50
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51 logger.debug("Create new theme: " + name);
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52
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53 Theme theme = new DefaultTheme(name, desc);
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54
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55 parseInherits(themeCfg, config, theme);
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56 parseFields(config, theme);
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57 parseAttrs(config, theme);
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58
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59 return theme;
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60 }
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61
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62
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63 /**
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64 * Get first matching theme for facet.
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65 *
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66 * @param name Name to match "from" of theme mapping.
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67 * @param pattern String to 'compare' to pattern in mapping.
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68 * @param output Name of the current output
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69 *
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70 * @return First matching theme.
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71 */
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72 public static Theme getTheme(
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73 FLYSContext c,
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74 String name,
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75 String pattern,
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76 String output,
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77 String groupName)
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78 {
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79 logger.debug("Search theme for: " + name + " - pattern: " + pattern);
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80
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81 if (c == null || name == null) {
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82 logger.warn("Cannot search for theme.");
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83 return null;
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84 }
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85
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86 // Fetch mapping and themes.
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87 Map<String, List<ThemeMapping>> map = (Map<String, List<ThemeMapping>>)
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88 c.get(FLYSContext.THEME_MAPPING);
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89
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90 List<ThemeGroup> tgs = (List<ThemeGroup>)
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91 c.get(FLYSContext.THEMES);
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92
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93 ThemeGroup group = null;
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94 for (ThemeGroup tg: tgs) {
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95 if(tg.getName().equals(groupName)) {
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96 group = tg;
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97 }
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98 }
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99
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100 if (group == null) {
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101 return null;
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102 }
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103
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104 Map<String, Theme> t = group.getThemes();
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105
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106 FLYSArtifact artifact = (FLYSArtifact) c.get(FLYSContext.ARTIFACT_KEY);
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107
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108 if (map == null || map.size() == 0 || t == null || t.size() == 0) {
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109 logger.warn("No mappings or themes found. Cannot retrieve theme!");
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110 return null;
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111 }
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112
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113 List<ThemeMapping> mapping = map.get(name);
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114
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115 if (mapping == null) {
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116 logger.warn("No theme found for mapping: " + name);
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117 return null;
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118 }
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119
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120 // Take first mapping of which all conditions are satisfied.
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121 for (ThemeMapping tm: mapping) {
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122 if (name.equals(tm.getFrom())
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123 && tm.applyPattern(pattern)
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124 && tm.masterAttrMatches(artifact)
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125 && tm.outputMatches(output))
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126 {
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127 return t.get(tm.getTo());
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128 }
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129 }
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130
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131 String msg =
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132 "No theme found for '" + name +
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133 "' with pattern '" + pattern + "' and output " + output + ".";
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134
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135 logger.warn(msg);
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136
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137 return null;
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138 }
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139
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140
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141 public static List<ThemeGroup> getThemeGroups(FLYSContext c) {
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142 List<ThemeGroup> tgs = (List<ThemeGroup>)
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143 c.get(FLYSContext.THEMES);
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144 return tgs;
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145 }
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146
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147
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148 public static List<Theme> getThemes (FLYSContext c, String name) {
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149 List<ThemeGroup> tgs = (List<ThemeGroup>)
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150 c.get(FLYSContext.THEMES);
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151 if (tgs == null) {
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152 return null;
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153 }
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154
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155 List<Theme> themes = new ArrayList<Theme>();
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156 for (ThemeGroup tg: tgs) {
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157 themes.add(tg.getThemeByName(name));
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158 }
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159 return themes;
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160 }
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161
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162 protected static String getName(Node config) {
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163 return (String) XMLUtils.xpath(config, "@name", XPathConstants.STRING);
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164 }
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165
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166
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167 protected static String getDescription(Node config) {
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168 return (String) XMLUtils.xpath(config, "@desc", XPathConstants.STRING);
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169 }
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170
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171
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172 protected static void parseInherits(Document themeCfg, Node cfg, Theme t) {
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173 parseInherits(themeCfg, cfg, t, null);
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174 }
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175
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176 protected static void parseInherits(
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177 Document themeCfg,
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178 Node cfg,
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179 Theme t,
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180 Map<String, Node> themes
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181 ) {
340
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182 logger.debug("ThemeFactory.parseInherits");
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183
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184 NodeList inherits = (NodeList) XMLUtils.xpath(
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185 cfg, "inherits/inherit", XPathConstants.NODESET);
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186
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187 int num = inherits != null ? inherits.getLength() : 0;
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188
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189 if (num == 0) {
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190 logger.debug("Theme does not inherit from other themes.");
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191 return;
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192 }
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193
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194 logger.debug("Theme inherits from " + num + " other themes.");
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195
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196 if (themes == null) {
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197 themes = buildThemeMap(themeCfg);
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198 }
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199
340
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200 for (int i = 0; i < num; i++) {
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201 Node inherit = inherits.item(i);
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202 String from = ((Element)inherit).getAttribute("from");
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203
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204 Node tmp = themes.get(from);
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205
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206 parseInherits(themeCfg, tmp, t, themes);
340
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207 parseFields(tmp, t);
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208 }
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209 }
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210
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diff changeset
211 protected static Map<String, Node> buildThemeMap(Document themeCfg) {
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diff changeset
212 Map<String, Node> map = new HashMap<String, Node>();
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diff changeset
213 String xpath = "/themes/themegroup/theme";
340
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214
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215 NodeList nodes = (NodeList)XMLUtils.xpath(
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diff changeset
216 themeCfg, xpath, XPathConstants.NODESET);
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217
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diff changeset
218 if (nodes != null) {
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219 for (int i = 0, N = nodes.getLength(); i < N; ++i) {
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220 Node node = nodes.item(i);
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221 String name = ((Element)node).getAttribute("name");
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222 map.put(name, node);
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223 }
340
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224 }
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225 return map;
340
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226 }
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227
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228
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229 protected static void parseFields(Node config, Theme theme) {
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230 if (config == null || theme == null) {
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231 logger.warn("Parsing fields without node or theme is senseless!");
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232 return;
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233 }
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234
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235 NodeList fields = (NodeList) XMLUtils.xpath(
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236 config, "fields/field", XPathConstants.NODESET);
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237
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238 int num = fields != null ? fields.getLength() : 0;
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239
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240 logger.debug("Found " + num + " own fields in this theme.");
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241
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242 if (num == 0) {
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243 logger.debug("Theme has no own fields.");
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244 return;
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245 }
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246
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247 for (int i = 0; i < num; i++) {
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248 Node field = fields.item(i);
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249
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250 addField(theme, field);
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251 }
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252 }
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253
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254
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255 protected static void addField(Theme theme, Node field) {
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256 String name = ((Element)field).getAttribute("name");
340
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257
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258 logger.debug("Add field: " + name);
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259
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260 NamedNodeMap attrs = field.getAttributes();
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261
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262 int num = attrs != null ? attrs.getLength() : 0;
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263
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264 if (num == 0) {
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265 logger.warn("This field has no attributes.");
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266 return;
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267 }
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268
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269 ThemeField theField = new DefaultThemeField(name);
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270
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271 for (int i = 0; i < num; i++) {
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272 Node attr = attrs.item(i);
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273
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274 String key = attr.getNodeName();
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275 String value = attr.getNodeValue();
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276
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277 theField.setAttribute(key, value);
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278 }
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279
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280 theme.addField(name, theField);
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281 }
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282
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283
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284 protected static void parseAttrs(Node config, Theme theme) {
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285 NamedNodeMap attrs = config.getAttributes();
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286
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287 int num = attrs != null ? attrs.getLength() : 0;
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288
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289 if (num == 0) {
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290 logger.debug("Theme has no attributes set.");
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291 return;
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292 }
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293
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294 for (int i = 0; i < num; i++) {
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295 Node attr = attrs.item(i);
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296
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297 String name = attr.getNodeName();
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298 String value = attr.getNodeValue();
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299
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300 theme.addAttribute(name, value);
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301 }
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302 }
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303 }
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304 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org