Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/themes/ThemeFactory.java @ 1686:e8d1e531687a

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Bugfix: #114 Enabled rendering charts with a single data point. flys-artifacts/trunk@2904 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Fri, 07 Oct 2011 13:15:48 +0000
parents 88a669785863
children d2a17e990c70
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.Map;
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5 import javax.xml.xpath.XPathConstants;
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6
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7 import org.apache.log4j.Logger;
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8
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9 import org.w3c.dom.Document;
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10 import org.w3c.dom.NamedNodeMap;
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11 import org.w3c.dom.Node;
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12 import org.w3c.dom.NodeList;
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13
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14 import de.intevation.artifacts.common.utils.XMLUtils;
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15
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16 import de.intevation.flys.artifacts.context.FLYSContext;
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18
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19 /**
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20 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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21 */
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22 public class ThemeFactory {
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23
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24 private static Logger logger = Logger.getLogger(ThemeFactory.class);
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25
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26 private ThemeFactory() {
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27 }
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29
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30 /**
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31 * Creates a new theme from <i>config</i>.
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32 *
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33 * @param themeCfg The theme config document that is used to fetch parent
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34 * themes.
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35 * @param config The theme config node.
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36 *
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37 * @return a new theme.
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38 */
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39 public static Theme createTheme(Document themeCfg, Node config) {
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40 String name = getName(config);
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41 String desc = getDescription(config);
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42
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43 logger.debug("Create new theme: " + name);
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45 Theme theme = new DefaultTheme(name, desc);
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46
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47 parseInherits(themeCfg, config, theme);
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48 parseFields(config, theme);
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49 parseAttrs(config, theme);
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50
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51 return theme;
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52 }
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55 /**
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56 * Returns the theme for a specified output type and facet.
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57 *
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58 * @param c The FLYSContext that stores the mappings and themes.
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59 * @param name The name of the mapping.
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60 *
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61 * @return a theme.
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62 */
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63 public static Theme getTheme(FLYSContext c, String name) {
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64 if (c == null || name == null) {
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65 logger.warn("Cannot search for theme.");
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66 return null;
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67 }
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68
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69 Map<String, String> map = (Map<String, String>)
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70 c.get(FLYSContext.THEME_MAPPING);
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71
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72 Map<String, Theme> t = (Map<String, Theme>)
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73 c.get(FLYSContext.THEMES);
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74
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75 if (map == null || map.size() == 0 || t == null || t.size() == 0) {
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76 logger.warn("No mappings or themes found. Cannot retrieve theme!");
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77 return null;
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78 }
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79
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80 String themeName = map.get(name);
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81
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82 if (themeName == null) {
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83 logger.warn("No theme found for mapping: " + name);
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84 }
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85
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86 return t.get(themeName);
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87 }
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88
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89
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90 protected static String getName(Node config) {
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91 return (String) XMLUtils.xpath(config, "@name", XPathConstants.STRING);
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92 }
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95 protected static String getDescription(Node config) {
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96 return (String) XMLUtils.xpath(config, "@desc", XPathConstants.STRING);
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97 }
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100 protected static void parseInherits(Document themeCfg, Node cfg, Theme t) {
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101 logger.debug("ThemeFactory.parseInherits");
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102
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103 NodeList inherits = (NodeList) XMLUtils.xpath(
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104 cfg, "inherits/inherit", XPathConstants.NODESET);
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105
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106 int num = inherits != null ? inherits.getLength() : 0;
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107
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108 if (num == 0) {
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109 logger.debug("Theme does not inherit from other themes.");
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110 return;
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111 }
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112
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113 logger.debug("Theme inherits from " + num + " other themes.");
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114
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115 for (int i = 0; i < num; i++) {
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116 Node inherit = inherits.item(i);
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117 String from = (String) XMLUtils.xpath(
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118 inherit, "@from", XPathConstants.STRING);
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119
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120 Node tmp = getThemeNode(themeCfg, from);
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121
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122 parseInherits(themeCfg, tmp, t);
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123 parseFields(tmp, t);
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124 }
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125 }
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126
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127
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128 protected static Node getThemeNode(Document themeCfg, String name) {
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129 if (name == null) {
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130 logger.warn("Cannot search theme config without name!");
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131 return null;
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132 }
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133
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134 logger.debug("Search for theme: " + name);
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135
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136 String xpath = "/themes/theme[@name='" + name + "']";
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137
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138 return (Node) XMLUtils.xpath(themeCfg, xpath, XPathConstants.NODE);
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139 }
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140
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141
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142 protected static void parseFields(Node config, Theme theme) {
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143 if (config == null || theme == null) {
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144 logger.warn("Parsing fields without node or theme is senseless!");
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145 return;
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146 }
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147
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148 NodeList fields = (NodeList) XMLUtils.xpath(
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149 config, "fields/field", XPathConstants.NODESET);
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150
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151 int num = fields != null ? fields.getLength() : 0;
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152
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153 logger.debug("Found " + num + " own fields in this theme.");
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154
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155 if (num == 0) {
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156 logger.debug("Theme has no own fields.");
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157 return;
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158 }
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159
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160 for (int i = 0; i < num; i++) {
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161 Node field = fields.item(i);
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162
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163 addField(theme, field);
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164 }
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165 }
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166
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167
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168 protected static void addField(Theme theme, Node field) {
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169 String name = (String) XMLUtils.xpath(
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170 field, "@name", XPathConstants.STRING);
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171
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172 logger.debug("Add field: " + name);
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173
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174 NamedNodeMap attrs = field.getAttributes();
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175
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176 int num = attrs != null ? attrs.getLength() : 0;
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177
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178 if (num == 0) {
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179 logger.warn("This field has no attributes.");
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180 return;
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181 }
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182
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183 ThemeField theField = new DefaultThemeField(name);
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184
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185 for (int i = 0; i < num; i++) {
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186 Node attr = attrs.item(i);
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187
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188 String key = attr.getNodeName();
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189 String value = attr.getNodeValue();
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190
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191 theField.setAttribute(key, value);
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192 }
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193
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194 theme.addField(name, theField);
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195 }
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196
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197
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198 protected static void parseAttrs(Node config, Theme theme) {
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199 NamedNodeMap attrs = config.getAttributes();
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200
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201 int num = attrs != null ? attrs.getLength() : 0;
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202
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203 if (num == 0) {
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204 logger.debug("Theme has no attributes set.");
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205 return;
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206 }
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207
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208 for (int i = 0; i < num; i++) {
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209 Node attr = attrs.item(i);
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210
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211 String name = attr.getNodeName();
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212 String value = attr.getNodeValue();
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213
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214 theme.addAttribute(name, value);
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215 }
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216 }
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217 }
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218 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org