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annotate flys-artifacts/src/main/java/de/intevation/flys/themes/ThemeFactory.java @ 1828:9562ca537143

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Added new optional condition for theme-mappings: the output name. flys-artifacts/trunk@3158 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Felix Wolfsteller <felix.wolfsteller@intevation.de>
date Fri, 04 Nov 2011 08:59:42 +0000
parents 6ed439ff61bf
children 6f047a407f84
rev   line source
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b36fd8f21e6a Implementation of interfaces and its default implementations and a factory to work with themes.
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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 /**
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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 {
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76 logger.debug("Search theme for: " + name + " - pattern: " + pattern);
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77
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78 if (c == null || name == null) {
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79 logger.warn("Cannot search for theme.");
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80 return null;
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81 }
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82
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83 // Fetch mapping and themes.
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84 Map<String, List<ThemeMapping>> map = (Map<String, List<ThemeMapping>>)
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85 c.get(FLYSContext.THEME_MAPPING);
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86
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87 Map<String, Theme> t = (Map<String, Theme>)
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88 c.get(FLYSContext.THEMES);
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89
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90 FLYSArtifact artifact = (FLYSArtifact) c.get(FLYSContext.ARTIFACT_KEY);
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91
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92 if (map == null || map.size() == 0 || t == null || t.size() == 0) {
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93 logger.warn("No mappings or themes found. Cannot retrieve theme!");
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94 return null;
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95 }
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96
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97 List<ThemeMapping> mapping = map.get(name);
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98
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99 if (mapping == null) {
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100 logger.warn("No theme found for mapping: " + name);
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101 return null;
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102 }
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103
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104 // Take first mapping of which all conditions are satisfied.
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105 for (ThemeMapping tm: mapping) {
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106 if (name.equals(tm.getFrom())
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107 && tm.applyPattern(pattern)
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108 && tm.masterAttrMatches(artifact)
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109 && tm.outputMatches(output))
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110 {
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111 return t.get(tm.getTo());
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112 }
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113 }
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114
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115 String msg =
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116 "No theme found for '" + name +
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117 "' with pattern '" + pattern + "' and output " + output + ".";
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118
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119 logger.warn(msg);
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120
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121 return null;
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122 }
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123
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124
340
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125 protected static String getName(Node config) {
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126 return (String) XMLUtils.xpath(config, "@name", XPathConstants.STRING);
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127 }
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128
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129
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130 protected static String getDescription(Node config) {
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131 return (String) XMLUtils.xpath(config, "@desc", XPathConstants.STRING);
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132 }
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133
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134
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135 protected static void parseInherits(Document themeCfg, Node cfg, Theme t) {
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136 logger.debug("ThemeFactory.parseInherits");
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137
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138 NodeList inherits = (NodeList) XMLUtils.xpath(
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139 cfg, "inherits/inherit", XPathConstants.NODESET);
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140
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141 int num = inherits != null ? inherits.getLength() : 0;
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142
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143 if (num == 0) {
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144 logger.debug("Theme does not inherit from other themes.");
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145 return;
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146 }
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147
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148 logger.debug("Theme inherits from " + num + " other themes.");
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149
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150 for (int i = 0; i < num; i++) {
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151 Node inherit = inherits.item(i);
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152 String from = (String) XMLUtils.xpath(
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153 inherit, "@from", XPathConstants.STRING);
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154
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155 Node tmp = getThemeNode(themeCfg, from);
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156
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157 parseInherits(themeCfg, tmp, t);
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158 parseFields(tmp, t);
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159 }
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160 }
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161
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162
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163 protected static Node getThemeNode(Document themeCfg, String name) {
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164 if (name == null) {
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165 logger.warn("Cannot search theme config without name!");
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166 return null;
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167 }
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168
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169 logger.debug("Search for theme: " + name);
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170
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171 String xpath = "/themes/theme[@name='" + name + "']";
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172
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173 return (Node) XMLUtils.xpath(themeCfg, xpath, XPathConstants.NODE);
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174 }
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175
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176
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177 protected static void parseFields(Node config, Theme theme) {
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178 if (config == null || theme == null) {
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179 logger.warn("Parsing fields without node or theme is senseless!");
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180 return;
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181 }
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182
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183 NodeList fields = (NodeList) XMLUtils.xpath(
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184 config, "fields/field", XPathConstants.NODESET);
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185
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186 int num = fields != null ? fields.getLength() : 0;
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187
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188 logger.debug("Found " + num + " own fields in this theme.");
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189
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190 if (num == 0) {
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191 logger.debug("Theme has no own fields.");
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192 return;
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193 }
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194
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195 for (int i = 0; i < num; i++) {
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196 Node field = fields.item(i);
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197
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198 addField(theme, field);
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199 }
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200 }
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201
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202
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203 protected static void addField(Theme theme, Node field) {
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204 String name = (String) XMLUtils.xpath(
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205 field, "@name", XPathConstants.STRING);
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206
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207 logger.debug("Add field: " + name);
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208
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209 NamedNodeMap attrs = field.getAttributes();
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210
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211 int num = attrs != null ? attrs.getLength() : 0;
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212
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213 if (num == 0) {
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214 logger.warn("This field has no attributes.");
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215 return;
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216 }
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217
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218 ThemeField theField = new DefaultThemeField(name);
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219
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220 for (int i = 0; i < num; i++) {
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221 Node attr = attrs.item(i);
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222
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223 String key = attr.getNodeName();
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224 String value = attr.getNodeValue();
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225
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226 theField.setAttribute(key, value);
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227 }
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228
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229 theme.addField(name, theField);
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230 }
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231
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232
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233 protected static void parseAttrs(Node config, Theme theme) {
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234 NamedNodeMap attrs = config.getAttributes();
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235
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236 int num = attrs != null ? attrs.getLength() : 0;
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237
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238 if (num == 0) {
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239 logger.debug("Theme has no attributes set.");
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240 return;
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241 }
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242
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243 for (int i = 0; i < num; i++) {
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244 Node attr = attrs.item(i);
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245
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246 String name = attr.getNodeName();
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247 String value = attr.getNodeValue();
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248
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249 theme.addAttribute(name, value);
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250 }
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251 }
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252 }
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253 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org