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annotate flys-artifacts/src/main/java/de/intevation/flys/themes/ThemeFactory.java @ 340:b36fd8f21e6a

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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>
date Thu, 21 Apr 2011 08:44:41 +0000
parents
children f72c63713099
rev   line source
340
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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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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 :
http://dive4elements.wald.intevation.org