Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/context/FLYSContextFactory.java @ 341:eca7892bf8ff
Added a first small theme configuration and code to read it.
flys-artifacts/trunk@1740 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
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date | Thu, 21 Apr 2011 08:47:39 +0000 |
parents | 53c155bfde07 |
children | 88a669785863 |
rev | line source |
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106
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Initializes a TransitionEngine storing all transitions for each artifact at the application start.
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1 package de.intevation.flys.artifacts.context; |
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2 |
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3 import java.io.File; |
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4 import java.util.ArrayList; |
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5 import java.util.HashMap; |
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6 import java.util.List; |
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7 import java.util.Map; |
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8 |
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9 import javax.xml.xpath.XPathConstants; |
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10 |
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11 import org.apache.log4j.Logger; |
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12 |
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13 import org.w3c.dom.Document; |
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14 import org.w3c.dom.Element; |
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15 import org.w3c.dom.Node; |
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16 import org.w3c.dom.NodeList; |
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17 |
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18 import de.intevation.artifacts.ArtifactContextFactory; |
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19 |
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20 import de.intevation.artifacts.common.utils.XMLUtils; |
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21 import de.intevation.artifacts.common.utils.Config; |
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22 |
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23 import de.intevation.artifactdatabase.state.State; |
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24 import de.intevation.artifactdatabase.state.StateEngine; |
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25 import de.intevation.artifactdatabase.transition.Transition; |
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26 import de.intevation.artifactdatabase.transition.TransitionEngine; |
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27 |
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28 import de.intevation.flys.artifacts.states.StateFactory; |
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29 import de.intevation.flys.artifacts.transitions.TransitionFactory; |
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30 import de.intevation.flys.themes.Theme; |
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31 import de.intevation.flys.themes.ThemeFactory; |
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32 |
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33 |
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34 /** |
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35 * The ArtifactContextFactory is used to initialize basic components and put |
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36 * them into the global context of the application. |
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37 * |
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38 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> |
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39 */ |
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40 public class FLYSContextFactory implements ArtifactContextFactory { |
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41 |
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42 /** The logger that is used in this class */ |
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43 private static Logger logger = Logger.getLogger(FLYSContextFactory.class); |
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44 |
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45 /** The XPath to the artifacts configured in the configuration. */ |
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46 public static final String XPATH_ARTIFACTS = |
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47 "/artifact-database/artifacts/artifact"; |
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48 |
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49 /** The XPath to the name of the artifact. */ |
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50 public static final String XPATH_ARTIFACT_NAME = "/artifact/@name"; |
106
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51 |
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52 /** The XPath to the xlink ref in an artifact configuration. */ |
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53 public static final String XPATH_XLINK = "xlink:href"; |
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54 |
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55 /** The XPath to the transitions configured in the artifact config. */ |
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56 public static final String XPATH_TRANSITIONS = |
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57 "/artifact/states/transition"; |
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58 |
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59 /** The XPath to the states configured in the artifact config. */ |
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60 public static final String XPATH_STATES = |
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61 "/artifact/states/state"; |
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62 |
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63 public static final String XPATH_OUTPUT_GENERATORS = |
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64 "/artifact-database/output-generators/output-generator"; |
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65 |
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66 public static final String XPATH_THEME_CONFIG = |
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67 "/artifact-database/flys/themes/configuration/text()"; |
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68 |
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69 public static final String XPATH_THEMES = |
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70 "/themes/theme"; |
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71 |
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72 /** |
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73 * Creates a new FLYSArtifactContext object and initialize all |
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74 * components required by the application. |
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75 * |
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76 * @param config The artifact server configuration. |
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77 * @return a FLYSArtifactContext. |
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78 */ |
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79 public Object createArtifactContext(Document config) { |
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80 FLYSContext context = new FLYSContext(config); |
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81 |
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82 configureTransitions(config, context); |
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83 configureStates(config, context); |
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84 configureOutGenerators(config, context); |
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85 configureThemes(config, context); |
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86 |
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87 return context; |
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88 } |
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89 |
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90 |
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91 /** |
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92 * This method initializes the transition configuration. |
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93 * |
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94 * @param config the config document. |
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95 * @param context the FLYSContext. |
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96 */ |
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97 protected void configureTransitions(Document config, FLYSContext context) { |
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98 TransitionEngine engine = new TransitionEngine(); |
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99 |
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100 Document[] artifacts = getArtifactConfigurations(config); |
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101 logger.info("Found " + artifacts.length + " artifacts in the config."); |
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102 |
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103 for (Document doc: artifacts) { |
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104 List<Transition> transitions = new ArrayList<Transition>(); |
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105 |
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106 String artName = (String) XMLUtils.xpath( |
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107 doc, XPATH_ARTIFACT_NAME, XPathConstants.STRING); |
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108 |
111
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109 NodeList list = (NodeList) XMLUtils.xpath( |
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110 doc, XPATH_TRANSITIONS, XPathConstants.NODESET); |
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111 |
111
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112 if (list == null) { |
106
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113 logger.warn("The artifact has no transitions configured."); |
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114 continue; |
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115 } |
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116 |
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117 int trans = list.getLength(); |
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118 |
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119 logger.info( |
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120 "Artifact '" + artName + "' has " + trans + " transitions."); |
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121 |
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122 for (int i = 0; i < trans; i++) { |
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123 Transition t = TransitionFactory.createTransition(list.item(i)); |
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124 String s = t.getFrom(); |
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125 engine.addTransition(s, t); |
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126 } |
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127 } |
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128 |
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129 context.put(FLYSContext.TRANSITION_ENGINE_KEY, engine); |
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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 * This method returns all artifact documents defined in |
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135 * <code>config</code>. <br>NOTE: The artifact configurations need to be |
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136 * stored in own files referenced by an xlink. |
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137 * |
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138 * @param config The global configuration. |
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139 * |
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140 * @return an array of Artifact configurations. |
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141 */ |
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142 protected Document[] getArtifactConfigurations(Document config) { |
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143 NodeList artifacts = (NodeList) XMLUtils.xpath( |
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144 config, XPATH_ARTIFACTS, XPathConstants.NODESET); |
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145 |
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146 int count = artifacts.getLength(); |
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147 |
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148 Document[] artifactDocs = new Document[count]; |
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149 |
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150 for (int i = 0; i < count; i++) { |
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151 Element tmp = (Element) artifacts.item(i); |
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152 |
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153 String xlink = tmp.getAttribute(XPATH_XLINK); |
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154 xlink = Config.replaceConfigDir(xlink); |
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155 |
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156 File artifactFile = new File(xlink); |
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157 artifactDocs[i] = XMLUtils.parseDocument(artifactFile); |
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158 } |
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159 |
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160 return artifactDocs; |
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161 } |
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162 |
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163 |
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164 /** |
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165 * This method initializes the transition configuration. |
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166 * |
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167 * @param config the config document. |
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168 * @param context the FLYSContext. |
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169 */ |
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170 protected void configureStates(Document config, FLYSContext context) { |
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171 StateEngine engine = new StateEngine(); |
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172 |
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173 Document[] artifacts = getArtifactConfigurations(config); |
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174 logger.info("Found " + artifacts.length + " artifacts in the config."); |
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175 |
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176 for (Document doc: artifacts) { |
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177 List<State> states = new ArrayList<State>(); |
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178 |
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179 String artName = (String) XMLUtils.xpath( |
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180 doc, XPATH_ARTIFACT_NAME, XPathConstants.STRING); |
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181 |
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182 NodeList stateList = (NodeList) XMLUtils.xpath( |
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183 doc, XPATH_STATES, XPathConstants.NODESET); |
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184 |
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185 if (stateList == null) { |
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186 logger.warn("The artifact has no states configured."); |
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187 continue; |
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188 } |
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189 |
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190 int count = stateList.getLength(); |
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191 |
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192 logger.info( |
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193 "Artifact '" + artName + "' has " + count + " states."); |
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194 |
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195 for (int i = 0; i < count; i++) { |
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196 states.add(StateFactory.createState( |
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197 stateList.item(i))); |
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198 } |
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199 |
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200 engine.addStates(artName, states); |
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201 } |
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202 |
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203 context.put(FLYSContext.STATE_ENGINE_KEY, engine); |
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204 } |
295
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205 |
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206 |
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207 /** |
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208 * This method intializes the provided output generators. |
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209 * |
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210 * @param config the config document. |
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211 * @param context the FLYSContext. |
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212 */ |
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213 protected void configureOutGenerators(Document config, FLYSContext context){ |
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214 Map<String, Class> generators = new HashMap<String, Class>(); |
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215 |
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216 NodeList outGenerators = (NodeList) XMLUtils.xpath( |
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217 config, |
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218 XPATH_OUTPUT_GENERATORS, |
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219 XPathConstants.NODESET); |
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220 |
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221 int num = outGenerators == null ? 0 : outGenerators.getLength(); |
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222 |
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223 if (num == 0) { |
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224 logger.warn("No output generators configured in this application."); |
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225 return; |
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226 } |
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227 |
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228 logger.info("Found " + num + " configured output generators."); |
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229 |
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230 int idx = 0; |
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231 |
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232 for (int i = 0; i < num; i++) { |
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233 Node item = outGenerators.item(i); |
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234 |
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235 String name = (String) XMLUtils.xpath( |
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236 item, "@name", XPathConstants.STRING); |
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237 |
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238 String clazz = (String) XMLUtils.xpath( |
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239 item, "text()", XPathConstants.STRING); |
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240 |
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241 if (name == null || clazz == null) { |
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242 continue; |
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243 } |
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244 |
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245 try { |
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246 generators.put(name, Class.forName(clazz)); |
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247 |
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248 idx++; |
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249 } |
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250 catch (ClassNotFoundException cnfe) { |
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251 logger.warn(cnfe, cnfe); |
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252 } |
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253 } |
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254 |
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255 logger.info("Successfully loaded " + idx + " output generators."); |
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256 context.put(FLYSContext.OUTGENERATORS_KEY, generators); |
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257 } |
341
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258 |
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259 |
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260 /** |
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261 * This methods reads the configured themes and puts them into the |
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262 * FLYSContext. |
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263 * |
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264 * @param config The global configuration. |
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265 * @param context The FLYSContext. |
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266 */ |
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267 protected void configureThemes(Document config, FLYSContext context) { |
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268 logger.debug("FLYSContextFactory.configureThemes"); |
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269 |
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270 Document cfg = getThemeConfig(config); |
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271 |
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272 NodeList themes = (NodeList) XMLUtils.xpath( |
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273 cfg, XPATH_THEMES, XPathConstants.NODESET); |
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274 |
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275 int num = themes != null ? themes.getLength() : 0; |
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276 |
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277 if (num == 0) { |
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278 logger.warn("There are no themes configured!"); |
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279 return; |
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280 } |
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281 |
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282 logger.debug("Found " + num + " configured themes."); |
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283 |
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284 Map<String, Theme> theThemes = new HashMap<String, Theme>(); |
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285 |
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286 for (int i = 0; i < num; i++) { |
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287 Node theme = themes.item(i); |
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288 |
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289 Theme theTheme = ThemeFactory.createTheme(cfg, theme); |
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290 |
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291 if (theme != null) { |
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292 theThemes.put(theTheme.getName(), theTheme); |
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293 } |
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294 } |
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295 |
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296 logger.debug("Initialized " + theThemes.size() + "/" + num + " themes"); |
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297 |
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298 context.put(FLYSContext.THEMES, theThemes); |
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299 } |
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300 |
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301 |
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302 /** |
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303 * This method is used to retrieve the theme configuration document. |
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304 * |
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305 * @param config The global configuration. |
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306 * |
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307 * @return the theme configuration. |
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308 */ |
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309 protected Document getThemeConfig(Document config) { |
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310 String themeConfig = (String) XMLUtils.xpath( |
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311 config, |
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312 XPATH_THEME_CONFIG, |
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313 XPathConstants.STRING); |
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314 |
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315 themeConfig = Config.replaceConfigDir(themeConfig); |
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316 |
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317 logger.debug("Parse theme cfg: " + themeConfig); |
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318 |
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319 return XMLUtils.parseDocument(new File(themeConfig)); |
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320 } |
106
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321 } |
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322 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |