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annotate flys-artifacts/src/main/java/de/intevation/flys/themes/ThemeFactory.java @ 1747:d2a17e990c70

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Improved the Themes: we now support special themes for facets which need to match a given pattern string. flys-artifacts/trunk@3047 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Thu, 20 Oct 2011 13:45:45 +0000
parents 88a669785863
children 6ed439ff61bf
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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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 public class ThemeFactory {
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24
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25 private static Logger logger = Logger.getLogger(ThemeFactory.class);
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26
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27 private ThemeFactory() {
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28 }
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29
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30
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31 /**
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32 * Creates a new theme from <i>config</i>.
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33 *
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34 * @param themeCfg The theme config document that is used to fetch parent
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35 * themes.
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36 * @param config The theme config node.
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37 *
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38 * @return a new theme.
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39 */
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40 public static Theme createTheme(Document themeCfg, Node config) {
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41 String name = getName(config);
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42 String desc = getDescription(config);
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43
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44 logger.debug("Create new theme: " + name);
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46 Theme theme = new DefaultTheme(name, desc);
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48 parseInherits(themeCfg, config, theme);
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49 parseFields(config, theme);
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50 parseAttrs(config, theme);
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51
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52 return theme;
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53 }
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54
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56 /**
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57 * Returns the theme for a specified output type and facet.
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58 *
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59 * @param c The FLYSContext that stores the mappings and themes.
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60 * @param name The name of the mapping.
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61 *
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62 * @return a theme.
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63 */
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64 public static Theme getTheme(FLYSContext c, String name) {
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65 return getTheme(c, name, null);
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66 }
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67
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69 public static Theme getTheme(FLYSContext c, String name, String pattern) {
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70 logger.debug("Search theme for: " + name + " - " + pattern);
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71 if (c == null || name == null) {
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72 logger.warn("Cannot search for theme.");
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73 return null;
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74 }
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75
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76 Map<String, List<ThemeMapping>> map = (Map<String, List<ThemeMapping>>)
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77 c.get(FLYSContext.THEME_MAPPING);
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78
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79 Map<String, Theme> t = (Map<String, Theme>)
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80 c.get(FLYSContext.THEMES);
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81
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82 if (map == null || map.size() == 0 || t == null || t.size() == 0) {
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83 logger.warn("No mappings or themes found. Cannot retrieve theme!");
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84 return null;
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85 }
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86
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87 List<ThemeMapping> mapping = map.get(name);
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88
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89 if (mapping == null) {
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90 logger.warn("No theme fount for mapping: " + name);
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91 return null;
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92 }
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94 int patternLen = pattern != null ? pattern.length() : 0;
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95
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96 Theme defaultTheme = null;
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98 for (ThemeMapping tm: mapping) {
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99 if (name.equals(tm.getFrom())) {
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100 String tmPattern = tm.getPatternStr();
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101
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102 int tmLen = tmPattern != null ? tmPattern.length() : 0;
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103
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104 if (tmLen == 0 && patternLen == 0) {
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105 // we want and get the default theme
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106 return t.get(tm.getTo());
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107 }
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108 else if (tmLen == 0 && patternLen > 0) {
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109 // found a defaultTheme, lets save it
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110 defaultTheme = t.get(tm.getTo());
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111 }
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112 else if (tm.applyPattern(pattern)) {
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113 // found the special theme we have searched for
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114 return t.get(tm.getTo());
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115 }
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116 }
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117 }
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118
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119 String msg =
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120 "No theme found for '" + name +
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121 "' with pattern '" + pattern + "'.";
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122
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123 if (defaultTheme != null) {
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124 logger.info(msg + " Use the default instead.");
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125 return defaultTheme;
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126 }
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127
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128 logger.warn(msg);
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129
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130 return null;
345
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131 }
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132
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133
340
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134 protected static String getName(Node config) {
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135 return (String) XMLUtils.xpath(config, "@name", XPathConstants.STRING);
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136 }
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137
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138
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139 protected static String getDescription(Node config) {
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140 return (String) XMLUtils.xpath(config, "@desc", XPathConstants.STRING);
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141 }
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142
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143
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144 protected static void parseInherits(Document themeCfg, Node cfg, Theme t) {
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145 logger.debug("ThemeFactory.parseInherits");
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146
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147 NodeList inherits = (NodeList) XMLUtils.xpath(
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148 cfg, "inherits/inherit", XPathConstants.NODESET);
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149
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150 int num = inherits != null ? inherits.getLength() : 0;
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151
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152 if (num == 0) {
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153 logger.debug("Theme does not inherit from other themes.");
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154 return;
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155 }
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156
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157 logger.debug("Theme inherits from " + num + " other themes.");
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158
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159 for (int i = 0; i < num; i++) {
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160 Node inherit = inherits.item(i);
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161 String from = (String) XMLUtils.xpath(
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162 inherit, "@from", XPathConstants.STRING);
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163
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164 Node tmp = getThemeNode(themeCfg, from);
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165
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166 parseInherits(themeCfg, tmp, t);
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167 parseFields(tmp, t);
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168 }
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169 }
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170
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171
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172 protected static Node getThemeNode(Document themeCfg, String name) {
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173 if (name == null) {
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174 logger.warn("Cannot search theme config without name!");
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175 return null;
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176 }
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177
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178 logger.debug("Search for theme: " + name);
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179
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180 String xpath = "/themes/theme[@name='" + name + "']";
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181
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182 return (Node) XMLUtils.xpath(themeCfg, xpath, XPathConstants.NODE);
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183 }
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184
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185
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186 protected static void parseFields(Node config, Theme theme) {
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187 if (config == null || theme == null) {
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188 logger.warn("Parsing fields without node or theme is senseless!");
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189 return;
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190 }
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191
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192 NodeList fields = (NodeList) XMLUtils.xpath(
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193 config, "fields/field", XPathConstants.NODESET);
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194
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195 int num = fields != null ? fields.getLength() : 0;
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196
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197 logger.debug("Found " + num + " own fields in this theme.");
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198
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199 if (num == 0) {
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200 logger.debug("Theme has no own fields.");
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201 return;
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202 }
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203
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204 for (int i = 0; i < num; i++) {
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205 Node field = fields.item(i);
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206
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207 addField(theme, field);
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208 }
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209 }
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210
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211
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212 protected static void addField(Theme theme, Node field) {
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213 String name = (String) XMLUtils.xpath(
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214 field, "@name", XPathConstants.STRING);
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215
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216 logger.debug("Add field: " + name);
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217
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218 NamedNodeMap attrs = field.getAttributes();
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219
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220 int num = attrs != null ? attrs.getLength() : 0;
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221
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222 if (num == 0) {
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223 logger.warn("This field has no attributes.");
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224 return;
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225 }
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226
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227 ThemeField theField = new DefaultThemeField(name);
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228
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229 for (int i = 0; i < num; i++) {
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230 Node attr = attrs.item(i);
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231
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232 String key = attr.getNodeName();
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233 String value = attr.getNodeValue();
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234
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235 theField.setAttribute(key, value);
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236 }
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237
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238 theme.addField(name, theField);
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239 }
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240
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241
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242 protected static void parseAttrs(Node config, Theme theme) {
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243 NamedNodeMap attrs = config.getAttributes();
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244
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245 int num = attrs != null ? attrs.getLength() : 0;
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246
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247 if (num == 0) {
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248 logger.debug("Theme has no attributes set.");
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249 return;
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250 }
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251
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252 for (int i = 0; i < num; i++) {
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253 Node attr = attrs.item(i);
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254
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255 String name = attr.getNodeName();
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256 String value = attr.getNodeValue();
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257
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258 theme.addAttribute(name, value);
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259 }
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260 }
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261 }
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262 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org