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annotate flys-artifacts/src/main/java/de/intevation/flys/themes/ThemeFactory.java @ 1993:85132c9edd64

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Make reuse of the old CollectionAttribute during the describe() operation of FLYSArtifactCollection - remove the old facets only. flys-artifacts/trunk@3430 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Fri, 16 Dec 2011 09:19:11 +0000
parents 6f047a407f84
children 83b22ccf48da
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
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6 import javax.xml.xpath.XPathConstants;
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7
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8 import org.apache.log4j.Logger;
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9
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10 import org.w3c.dom.Document;
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11 import org.w3c.dom.NamedNodeMap;
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12 import org.w3c.dom.Node;
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13 import org.w3c.dom.NodeList;
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14
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15 import de.intevation.artifacts.common.utils.XMLUtils;
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16
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17 import de.intevation.flys.artifacts.context.FLYSContext;
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18 import de.intevation.flys.artifacts.FLYSArtifact;
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19
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20 /**
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21 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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22 *
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23 * Mapping-matching rules:
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24 *
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25 */
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26 public class ThemeFactory {
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27
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28 private static Logger logger = Logger.getLogger(ThemeFactory.class);
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29
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30 /** Trivial, hidden constructor. */
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31 private ThemeFactory() {
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32 }
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33
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34
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35 /**
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36 * Creates a new theme from <i>config</i>.
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37 *
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38 * @param themeCfg The theme config document that is used to fetch parent
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39 * themes.
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40 * @param config The theme config node.
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41 *
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42 * @return a new theme.
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43 */
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44 public static Theme createTheme(Document themeCfg, Node config) {
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45 String name = getName(config);
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46 String desc = getDescription(config);
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48 logger.debug("Create new theme: " + name);
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49
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50 Theme theme = new DefaultTheme(name, desc);
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51
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52 parseInherits(themeCfg, config, theme);
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53 parseFields(config, theme);
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54 parseAttrs(config, theme);
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55
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56 return theme;
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57 }
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58
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59
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60 /**
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61 * Get first matching theme for facet.
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62 *
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63 * @param name Name to match "from" of theme mapping.
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64 * @param pattern String to 'compare' to pattern in mapping.
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65 * @param output Name of the current output
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66 *
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67 * @return First matching theme.
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68 */
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69 public static Theme getTheme(
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70 FLYSContext c,
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71 String name,
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72 String pattern,
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73 String output)
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74 {
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75 logger.debug("Search theme for: " + name + " - pattern: " + pattern);
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76
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77 if (c == null || name == null) {
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78 logger.warn("Cannot search for theme.");
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79 return null;
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80 }
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81
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82 // Fetch mapping and themes.
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83 Map<String, List<ThemeMapping>> map = (Map<String, List<ThemeMapping>>)
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84 c.get(FLYSContext.THEME_MAPPING);
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85
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86 Map<String, Theme> t = (Map<String, Theme>)
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87 c.get(FLYSContext.THEMES);
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88
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89 FLYSArtifact artifact = (FLYSArtifact) c.get(FLYSContext.ARTIFACT_KEY);
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90
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91 if (map == null || map.size() == 0 || t == null || t.size() == 0) {
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92 logger.warn("No mappings or themes found. Cannot retrieve theme!");
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93 return null;
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94 }
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95
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96 List<ThemeMapping> mapping = map.get(name);
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97
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98 if (mapping == null) {
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99 logger.warn("No theme found for mapping: " + name);
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100 return null;
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101 }
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102
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103 // Take first mapping of which all conditions are satisfied.
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104 for (ThemeMapping tm: mapping) {
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105 if (name.equals(tm.getFrom())
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106 && tm.applyPattern(pattern)
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107 && tm.masterAttrMatches(artifact)
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108 && tm.outputMatches(output))
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109 {
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110 return t.get(tm.getTo());
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111 }
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112 }
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113
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114 String msg =
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115 "No theme found for '" + name +
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116 "' with pattern '" + pattern + "' and output " + output + ".";
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117
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118 logger.warn(msg);
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119
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120 return null;
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121 }
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122
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123
340
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124 protected static String getName(Node config) {
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125 return (String) XMLUtils.xpath(config, "@name", XPathConstants.STRING);
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126 }
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127
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128
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129 protected static String getDescription(Node config) {
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130 return (String) XMLUtils.xpath(config, "@desc", XPathConstants.STRING);
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131 }
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132
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133
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134 protected static void parseInherits(Document themeCfg, Node cfg, Theme t) {
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135 logger.debug("ThemeFactory.parseInherits");
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136
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137 NodeList inherits = (NodeList) XMLUtils.xpath(
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138 cfg, "inherits/inherit", XPathConstants.NODESET);
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139
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140 int num = inherits != null ? inherits.getLength() : 0;
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141
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142 if (num == 0) {
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143 logger.debug("Theme does not inherit from other themes.");
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144 return;
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145 }
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146
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147 logger.debug("Theme inherits from " + num + " other themes.");
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148
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149 for (int i = 0; i < num; i++) {
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150 Node inherit = inherits.item(i);
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151 String from = (String) XMLUtils.xpath(
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152 inherit, "@from", XPathConstants.STRING);
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153
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154 Node tmp = getThemeNode(themeCfg, from);
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155
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156 parseInherits(themeCfg, tmp, t);
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157 parseFields(tmp, t);
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158 }
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159 }
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160
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161
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162 protected static Node getThemeNode(Document themeCfg, String name) {
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163 if (name == null) {
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164 logger.warn("Cannot search theme config without name!");
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165 return null;
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166 }
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167
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168 logger.debug("Search for theme: " + name);
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169
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170 String xpath = "/themes/theme[@name='" + name + "']";
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171
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172 return (Node) XMLUtils.xpath(themeCfg, xpath, XPathConstants.NODE);
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173 }
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174
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175
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176 protected static void parseFields(Node config, Theme theme) {
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177 if (config == null || theme == null) {
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178 logger.warn("Parsing fields without node or theme is senseless!");
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179 return;
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180 }
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181
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182 NodeList fields = (NodeList) XMLUtils.xpath(
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183 config, "fields/field", XPathConstants.NODESET);
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184
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185 int num = fields != null ? fields.getLength() : 0;
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186
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187 logger.debug("Found " + num + " own fields in this theme.");
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188
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189 if (num == 0) {
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190 logger.debug("Theme has no own fields.");
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191 return;
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192 }
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193
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194 for (int i = 0; i < num; i++) {
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195 Node field = fields.item(i);
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196
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197 addField(theme, field);
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198 }
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199 }
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200
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201
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202 protected static void addField(Theme theme, Node field) {
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203 String name = (String) XMLUtils.xpath(
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204 field, "@name", XPathConstants.STRING);
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205
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206 logger.debug("Add field: " + name);
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207
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208 NamedNodeMap attrs = field.getAttributes();
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209
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210 int num = attrs != null ? attrs.getLength() : 0;
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211
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212 if (num == 0) {
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213 logger.warn("This field has no attributes.");
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214 return;
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215 }
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216
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217 ThemeField theField = new DefaultThemeField(name);
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218
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219 for (int i = 0; i < num; i++) {
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220 Node attr = attrs.item(i);
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221
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222 String key = attr.getNodeName();
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223 String value = attr.getNodeValue();
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224
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225 theField.setAttribute(key, value);
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226 }
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227
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228 theme.addField(name, theField);
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229 }
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230
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231
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232 protected static void parseAttrs(Node config, Theme theme) {
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233 NamedNodeMap attrs = config.getAttributes();
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234
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235 int num = attrs != null ? attrs.getLength() : 0;
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236
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237 if (num == 0) {
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238 logger.debug("Theme has no attributes set.");
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239 return;
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240 }
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241
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242 for (int i = 0; i < num; i++) {
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243 Node attr = attrs.item(i);
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244
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245 String name = attr.getNodeName();
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246 String value = attr.getNodeValue();
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247
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248 theme.addAttribute(name, value);
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249 }
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250 }
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251 }
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252 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org