Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/themes/ThemeFactory.java @ 2089:0da8874bd378

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Added initial state to map artifact to be able to advance and step back. The map artifact overrides describe() to have the complete UI information in the describe response document. flys-artifacts/trunk@3613 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Raimund Renkert <raimund.renkert@intevation.de>
date Fri, 06 Jan 2012 12:02:10 +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