Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/themes/ThemeFactory.java @ 9555:ef5754ba5573

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Implemented legend aggregation based on type of themes. Added theme-editor style configuration for aggregated legend entries. Only configured themes get aggregated.
author gernotbelger
date Tue, 23 Oct 2018 16:26:48 +0200
parents f0ea2063b58e
children
rev   line source
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4897a58c8746 River artifacts: Added new copyright headers.
Sascha L. Teichmann <teichmann@intevation.de>
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU AGPL (>=v3)
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the
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6 * documentation coming with Dive4Elements River for details.
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7 */
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8
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9 package org.dive4elements.river.themes;
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10
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11 import java.util.ArrayList;
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12 import java.util.HashMap;
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13 import java.util.List;
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14 import java.util.Map;
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15
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16 import javax.xml.xpath.XPathConstants;
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17
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18 import org.apache.log4j.Logger;
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19 import org.dive4elements.artifacts.common.utils.XMLUtils;
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20 import org.dive4elements.river.artifacts.D4EArtifact;
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21 import org.dive4elements.river.artifacts.context.RiverContext;
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22 import org.w3c.dom.Document;
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23 import org.w3c.dom.Element;
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24 import org.w3c.dom.NamedNodeMap;
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25 import org.w3c.dom.Node;
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26 import org.w3c.dom.NodeList;
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27
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28 /**
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29 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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30 *
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31 * Mapping-matching rules:
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32 *
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33 */
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34 public class ThemeFactory {
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35
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36 private static Logger log = Logger.getLogger(ThemeFactory.class);
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37
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38 /** Trivial, hidden constructor. */
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39 private ThemeFactory() {
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40 }
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41
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42 /**
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43 * Creates a new theme from <i>config</i>.
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44 *
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45 * @param themeCfg
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46 * The theme config document that is used to fetch parent
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47 * themes.
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48 * @param config
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49 * The theme config node.
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50 *
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51 * @return a new theme.
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52 */
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53 public static Theme createTheme(final Document themeCfg, final Node config) {
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54 final String name = getName(config);
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55 final String desc = getDescription(config);
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56
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57 log.trace("Create new theme: " + name);
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58
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59 final DefaultTheme theme = new DefaultTheme(name, desc);
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60
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61 parseInherits(themeCfg, config, theme);
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62 parseFields(config, theme);
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63 parseAttrs(config, theme);
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64
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65 return theme;
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66 }
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67
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68 /**
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69 * Get first matching theme for facet.
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70 *
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71 * @param name
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72 * Name to match "from" of theme mapping.
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73 * @param pattern
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74 * String to 'compare' to pattern in mapping.
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75 * @param output
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76 * Name of the current output
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77 *
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78 * @return First matching theme.
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79 */
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80 public static Theme getTheme(final RiverContext c, final String name, final String pattern, final String output, final String groupName) {
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81 if (log.isDebugEnabled()) {
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82 log.debug("Search theme for: " + name + " - pattern: " + pattern);
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83 }
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84
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85 if (c == null || name == null) {
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86 log.warn("Cannot search for theme.");
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87 return null;
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88 }
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89
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90 // Fetch mapping and themes.
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91 @SuppressWarnings("unchecked")
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92 final
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93 Map<String, List<ThemeMapping>> map = (Map<String, List<ThemeMapping>>) c.get(RiverContext.THEME_MAPPING);
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94
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95 @SuppressWarnings("unchecked")
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96 final
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97 List<ThemeGroup> tgs = (List<ThemeGroup>) c.get(RiverContext.THEMES);
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98
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99 ThemeGroup group = null;
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100 for (final ThemeGroup tg : tgs) {
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101 if (tg.getName().equals(groupName)) {
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102 group = tg;
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103 break;
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104 }
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105 }
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106
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107 if (group == null) {
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108 log.warn("No theme group found: '" + groupName + "'");
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109 return null;
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110 }
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111
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112 final Map<String, Theme> t = group.getThemes();
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113
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114 final D4EArtifact artifact = (D4EArtifact) c.get(RiverContext.ARTIFACT_KEY);
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115
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116 if (map == null || map.isEmpty() || t == null || t.isEmpty()) {
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117 log.warn("No mappings or themes found. Cannot retrieve theme!");
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118 return null;
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119 }
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120
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121 final List<ThemeMapping> mapping = map.get(name);
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122
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123 if (mapping == null) {
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124 log.warn("No theme found for mapping: " + name);
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125 return null;
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126 }
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127
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128 // Take first mapping of which all conditions are satisfied.
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129 for (final ThemeMapping tm : mapping) {
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130 if (name.equals(tm.getFrom()) && tm.applyPattern(pattern) && tm.masterAttrMatches(artifact) && tm.outputMatches(output)) {
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131 final String target = tm.getTo();
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132
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133 log.debug("Found theme '" + target + "'");
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134 return t.get(target);
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135 }
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136 }
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137
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138 final String msg = "No theme found for '" + name + "' with pattern '" + pattern + "' and output " + output + ".";
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139
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140 log.warn(msg);
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141
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142 return null;
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143 }
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144
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145 @SuppressWarnings("unchecked")
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146 public static List<ThemeGroup> getThemeGroups(final RiverContext c) {
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147 final List<ThemeGroup> tgs = (List<ThemeGroup>) c.get(RiverContext.THEMES);
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148 return tgs;
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149 }
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150
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151 @SuppressWarnings("unchecked")
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152 public static List<Theme> getThemes(final RiverContext c, final String name) {
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153 final List<ThemeGroup> tgs = (List<ThemeGroup>) c.get(RiverContext.THEMES);
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154 if (tgs == null) {
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155 return null;
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156 }
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157
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158 final List<Theme> themes = new ArrayList<>();
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159 for (final ThemeGroup tg : tgs) {
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160 themes.add(tg.getThemeByName(name));
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161 }
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162 return themes;
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163 }
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164
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165 private static String getName(final Node config) {
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166 return ((Element) config).getAttribute("name");
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167 }
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168
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169 private static String getDescription(final Node config) {
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170 return ((Element) config).getAttribute("desc");
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171 }
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172
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173 private static void parseInherits(final Document themeCfg, final Node cfg, final DefaultTheme t) {
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174 parseInherits(themeCfg, cfg, t, null);
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175 }
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176
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177 private static void parseInherits(final Document themeCfg, final Node cfg, final DefaultTheme t, Map<String, Node> themes) {
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178 log.trace("ThemeFactory.parseInherits");
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179
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180 final NodeList inherits = ((Element) cfg).getElementsByTagName("inherit");
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181
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182 final int num = inherits.getLength();
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183
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184 if (num == 0) {
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185 log.trace("Theme does not inherit from other themes.");
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186 return;
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187 }
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188
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189 log.trace("Theme inherits from " + num + " other themes.");
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190
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191 if (themes == null) {
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192 themes = buildThemeMap(themeCfg);
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193 }
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194
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195 for (int i = 0; i < num; i++) {
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196 final Node inherit = inherits.item(i);
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197 final String from = ((Element) inherit).getAttribute("from");
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198
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199 final Node tmp = themes.get(from);
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200
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201 parseInherits(themeCfg, tmp, t, themes);
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202 parseFields(tmp, t);
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203 }
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204 }
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205
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206 private static Map<String, Node> buildThemeMap(final Document themeCfg) {
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207 final Map<String, Node> map = new HashMap<>();
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208 final String xpath = "/themes/themegroup/theme";
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209
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210 final NodeList nodes = (NodeList) XMLUtils.xpath(themeCfg, xpath, XPathConstants.NODESET);
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211
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212 if (nodes != null) {
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213 for (int i = 0, N = nodes.getLength(); i < N; ++i) {
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214 final Node node = nodes.item(i);
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215 final String name = ((Element) node).getAttribute("name");
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216 map.put(name, node);
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217 }
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218 }
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219 return map;
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220 }
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221
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222 private static void parseFields(final Node config, final DefaultTheme theme) {
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223 if (config == null || theme == null) {
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224 log.warn("Parsing fields without node or theme is senseless!");
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225 return;
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226 }
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227
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228 final NodeList fields = ((Element) config).getElementsByTagName("field");
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229
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230 final int num = fields.getLength();
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231
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232 log.trace("Found " + num + " own fields in this theme.");
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233
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234 if (num == 0) {
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235 log.trace("Theme has no own fields.");
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236 return;
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237 }
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238
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239 for (int i = 0; i < num; i++) {
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240 final Node field = fields.item(i);
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241
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242 addField(theme, field);
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243 }
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244 }
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245
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246 private static void addField(final DefaultTheme theme, final Node field) {
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247 final String name = ((Element) field).getAttribute("name");
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248
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249 log.trace("Add field " + name + " to theme " + theme.getName());
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250
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251 final NamedNodeMap attrs = field.getAttributes();
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252
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253 final int num = attrs != null ? attrs.getLength() : 0;
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254
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255 if (num == 0) {
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256 log.warn("This field has no attributes.");
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257 return;
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258 }
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259
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260 final ThemeField theField = new DefaultThemeField(name);
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261
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262 for (int i = 0; i < num; i++) {
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263 final Node attr = attrs.item(i);
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264
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265 final String key = attr.getNodeName();
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266 final String value = attr.getNodeValue();
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267
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268 theField.setAttribute(key, value);
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269 }
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270
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271 theme.addField(name, theField);
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272 }
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273
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274 private static void parseAttrs(final Node config, final DefaultTheme theme) {
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275 final NamedNodeMap attrs = config.getAttributes();
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276
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277 final int num = attrs != null ? attrs.getLength() : 0;
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278
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279 if (num == 0) {
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280 log.trace("Theme has no attributes set.");
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281 return;
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282 }
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283
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284 for (int i = 0; i < num; i++) {
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285 final Node attr = attrs.item(i);
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286
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287 final String name = attr.getNodeName();
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288 final String value = attr.getNodeValue();
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289
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290 theme.addAttribute(name, value);
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291 }
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292 }
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293
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294 public static Theme getLegendTheme(final RiverContext flysContext, final String themeType) {
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295
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296 @SuppressWarnings("unchecked")
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297 final
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298 Map<String, Theme> themes = (Map<String, Theme>) flysContext.get(RiverContext.LEGEND);
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299 return themes.get(themeType);
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300 }
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301 }
http://dive4elements.wald.intevation.org