Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/themes/ThemeFactory.java @ 340:b36fd8f21e6a
Implementation of interfaces and its default implementations and a factory to work with themes.
flys-artifacts/trunk@1739 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
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date | Thu, 21 Apr 2011 08:44:41 +0000 |
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children | f72c63713099 |
rev | line source |
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340
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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 javax.xml.xpath.XPathConstants; |
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4 |
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5 import org.apache.log4j.Logger; |
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6 |
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7 import org.w3c.dom.Document; |
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8 import org.w3c.dom.NamedNodeMap; |
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9 import org.w3c.dom.Node; |
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10 import org.w3c.dom.NodeList; |
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11 |
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12 import de.intevation.artifacts.common.utils.XMLUtils; |
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13 |
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14 |
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15 /** |
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16 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> |
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17 */ |
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18 public class ThemeFactory { |
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19 |
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20 private static Logger logger = Logger.getLogger(ThemeFactory.class); |
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21 |
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22 private ThemeFactory() { |
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23 } |
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24 |
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25 |
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26 /** |
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27 * Creates a new theme from <i>config</i>. |
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28 * |
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29 * @param themeCfg The theme config document that is used to fetch parent |
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30 * themes. |
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31 * @param config The theme config node. |
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32 * |
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33 * @return a new theme. |
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34 */ |
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35 public static Theme createTheme(Document themeCfg, Node config) { |
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36 String name = getName(config); |
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37 String desc = getDescription(config); |
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38 |
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39 logger.debug("Create new theme: " + name); |
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40 |
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41 Theme theme = new DefaultTheme(name, desc); |
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42 |
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43 parseInherits(themeCfg, config, theme); |
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44 parseFields(config, theme); |
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45 parseAttrs(config, theme); |
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46 |
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47 String tmp = theme.getAttribute("type"); |
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48 if (tmp == null || !tmp.equals("virtual")) { |
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49 de.intevation.flys.artifacts.XMLDebug.out(theme.toXML()); |
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50 } |
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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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55 |
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56 protected static String getName(Node config) { |
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57 return (String) XMLUtils.xpath(config, "@name", XPathConstants.STRING); |
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58 } |
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59 |
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60 |
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61 protected static String getDescription(Node config) { |
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62 return (String) XMLUtils.xpath(config, "@desc", XPathConstants.STRING); |
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63 } |
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64 |
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65 |
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66 protected static void parseInherits(Document themeCfg, Node cfg, Theme t) { |
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67 logger.debug("ThemeFactory.parseInherits"); |
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68 |
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69 NodeList inherits = (NodeList) XMLUtils.xpath( |
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70 cfg, "inherits/inherit", XPathConstants.NODESET); |
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71 |
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72 int num = inherits != null ? inherits.getLength() : 0; |
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73 |
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74 if (num == 0) { |
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75 logger.debug("Theme does not inherit from other themes."); |
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76 return; |
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77 } |
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78 |
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79 logger.debug("Theme inherits from " + num + " other themes."); |
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80 |
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81 for (int i = 0; i < num; i++) { |
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82 Node inherit = inherits.item(i); |
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83 String from = (String) XMLUtils.xpath( |
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84 inherit, "@from", XPathConstants.STRING); |
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85 |
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86 Node tmp = getThemeNode(themeCfg, from); |
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87 |
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88 parseInherits(themeCfg, tmp, t); |
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89 parseFields(tmp, t); |
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90 } |
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91 } |
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92 |
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93 |
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94 protected static Node getThemeNode(Document themeCfg, String name) { |
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95 if (name == null) { |
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96 logger.warn("Cannot search theme config without name!"); |
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97 return null; |
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98 } |
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99 |
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100 logger.debug("Search for theme: " + name); |
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101 |
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102 String xpath = "/themes/theme[@name='" + name + "']"; |
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103 |
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104 return (Node) XMLUtils.xpath(themeCfg, xpath, XPathConstants.NODE); |
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105 } |
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106 |
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107 |
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108 protected static void parseFields(Node config, Theme theme) { |
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109 if (config == null || theme == null) { |
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110 logger.warn("Parsing fields without node or theme is senseless!"); |
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111 return; |
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112 } |
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113 |
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114 NodeList fields = (NodeList) XMLUtils.xpath( |
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115 config, "fields/field", XPathConstants.NODESET); |
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116 |
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117 int num = fields != null ? fields.getLength() : 0; |
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118 |
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119 logger.debug("Found " + num + " own fields in this theme."); |
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120 |
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121 if (num == 0) { |
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122 logger.debug("Theme has no own fields."); |
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123 return; |
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124 } |
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125 |
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126 for (int i = 0; i < num; i++) { |
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127 Node field = fields.item(i); |
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128 |
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129 addField(theme, field); |
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130 } |
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131 } |
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132 |
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133 |
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134 protected static void addField(Theme theme, Node field) { |
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135 String name = (String) XMLUtils.xpath( |
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136 field, "@name", XPathConstants.STRING); |
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137 |
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138 logger.debug("Add field: " + name); |
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139 |
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140 NamedNodeMap attrs = field.getAttributes(); |
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141 |
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142 int num = attrs != null ? attrs.getLength() : 0; |
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143 |
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144 if (num == 0) { |
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145 logger.warn("This field has no attributes."); |
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146 return; |
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147 } |
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148 |
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149 ThemeField theField = new DefaultThemeField(name); |
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150 |
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151 for (int i = 0; i < num; i++) { |
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152 Node attr = attrs.item(i); |
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153 |
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154 String key = attr.getNodeName(); |
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155 String value = attr.getNodeValue(); |
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156 |
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157 theField.setAttribute(key, value); |
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158 } |
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159 |
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160 theme.addField(name, theField); |
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161 } |
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162 |
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163 |
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164 protected static void parseAttrs(Node config, Theme theme) { |
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165 NamedNodeMap attrs = config.getAttributes(); |
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166 |
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167 int num = attrs != null ? attrs.getLength() : 0; |
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168 |
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169 if (num == 0) { |
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170 logger.debug("Theme has no attributes set."); |
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171 return; |
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172 } |
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173 |
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174 for (int i = 0; i < num; i++) { |
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175 Node attr = attrs.item(i); |
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176 |
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177 String name = attr.getNodeName(); |
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178 String value = attr.getNodeValue(); |
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179 |
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180 theme.addAttribute(name, value); |
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181 } |
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182 } |
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183 } |
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184 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |