Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/context/FLYSContextFactory.java @ 295:53c155bfde07
Added code to parse the configured OutGenerators in the global configuration and to save a map of such in the FLYSContext.
flys-artifacts/trunk@1633 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
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date | Thu, 31 Mar 2011 10:56:08 +0000 |
parents | 1fa38d60a702 |
children | eca7892bf8ff |
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 |
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31 |
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32 /** |
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33 * The ArtifactContextFactory is used to initialize basic components and put |
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34 * them into the global context of the application. |
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35 * |
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36 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> |
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37 */ |
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38 public class FLYSContextFactory implements ArtifactContextFactory { |
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39 |
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40 /** The logger that is used in this class */ |
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41 private static Logger logger = Logger.getLogger(FLYSContextFactory.class); |
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42 |
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43 /** The XPath to the artifacts configured in the configuration. */ |
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44 public static final String XPATH_ARTIFACTS = |
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45 "/artifact-database/artifacts/artifact"; |
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46 |
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47 /** The XPath to the name of the artifact. */ |
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48 public static final String XPATH_ARTIFACT_NAME = "/artifact/@name"; |
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49 |
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50 /** The XPath to the xlink ref in an artifact configuration. */ |
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51 public static final String XPATH_XLINK = "xlink:href"; |
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52 |
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53 /** The XPath to the transitions configured in the artifact config. */ |
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54 public static final String XPATH_TRANSITIONS = |
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55 "/artifact/states/transition"; |
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56 |
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57 /** The XPath to the states configured in the artifact config. */ |
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58 public static final String XPATH_STATES = |
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59 "/artifact/states/state"; |
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60 |
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61 public static final String XPATH_OUTPUT_GENERATORS = |
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62 "/artifact-database/output-generators/output-generator"; |
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63 |
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64 /** |
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65 * Creates a new FLYSArtifactContext object and initialize all |
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66 * components required by the application. |
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67 * |
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68 * @param config The artifact server configuration. |
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69 * @return a FLYSArtifactContext. |
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70 */ |
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71 public Object createArtifactContext(Document config) { |
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72 FLYSContext context = new FLYSContext(config); |
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73 |
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74 configureTransitions(config, context); |
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75 configureStates(config, context); |
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76 configureOutGenerators(config, context); |
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77 |
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78 return context; |
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79 } |
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80 |
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81 |
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82 /** |
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83 * This method initializes the transition configuration. |
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84 * |
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85 * @param config the config document. |
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86 * @param context the FLYSContext. |
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87 */ |
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88 protected void configureTransitions(Document config, FLYSContext context) { |
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89 TransitionEngine engine = new TransitionEngine(); |
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90 |
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91 Document[] artifacts = getArtifactConfigurations(config); |
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92 logger.info("Found " + artifacts.length + " artifacts in the config."); |
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93 |
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94 for (Document doc: artifacts) { |
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95 List<Transition> transitions = new ArrayList<Transition>(); |
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96 |
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97 String artName = (String) XMLUtils.xpath( |
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98 doc, XPATH_ARTIFACT_NAME, XPathConstants.STRING); |
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99 |
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100 NodeList list = (NodeList) XMLUtils.xpath( |
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101 doc, XPATH_TRANSITIONS, XPathConstants.NODESET); |
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102 |
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103 if (list == null) { |
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104 logger.warn("The artifact has no transitions configured."); |
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105 continue; |
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106 } |
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107 |
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108 int trans = list.getLength(); |
106
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109 |
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110 logger.info( |
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111 "Artifact '" + artName + "' has " + trans + " transitions."); |
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112 |
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113 for (int i = 0; i < trans; i++) { |
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114 Transition t = TransitionFactory.createTransition(list.item(i)); |
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115 String s = t.getFrom(); |
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116 engine.addTransition(s, t); |
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117 } |
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118 } |
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119 |
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120 context.put(FLYSContext.TRANSITION_ENGINE_KEY, engine); |
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121 } |
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122 |
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123 |
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124 /** |
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125 * This method returns all artifact documents defined in |
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126 * <code>config</code>. <br>NOTE: The artifact configurations need to be |
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127 * stored in own files referenced by an xlink. |
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128 * |
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129 * @param config The global configuration. |
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130 * |
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131 * @return an array of Artifact configurations. |
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132 */ |
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133 protected Document[] getArtifactConfigurations(Document config) { |
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134 NodeList artifacts = (NodeList) XMLUtils.xpath( |
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135 config, XPATH_ARTIFACTS, XPathConstants.NODESET); |
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136 |
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137 int count = artifacts.getLength(); |
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138 |
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139 Document[] artifactDocs = new Document[count]; |
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140 |
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141 for (int i = 0; i < count; i++) { |
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142 Element tmp = (Element) artifacts.item(i); |
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143 |
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144 String xlink = tmp.getAttribute(XPATH_XLINK); |
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145 xlink = Config.replaceConfigDir(xlink); |
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146 |
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147 File artifactFile = new File(xlink); |
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148 artifactDocs[i] = XMLUtils.parseDocument(artifactFile); |
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149 } |
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150 |
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151 return artifactDocs; |
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152 } |
107
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153 |
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154 |
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155 /** |
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156 * This method initializes the transition configuration. |
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157 * |
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158 * @param config the config document. |
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159 * @param context the FLYSContext. |
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160 */ |
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161 protected void configureStates(Document config, FLYSContext context) { |
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162 StateEngine engine = new StateEngine(); |
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163 |
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164 Document[] artifacts = getArtifactConfigurations(config); |
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165 logger.info("Found " + artifacts.length + " artifacts in the config."); |
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166 |
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167 for (Document doc: artifacts) { |
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168 List<State> states = new ArrayList<State>(); |
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169 |
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170 String artName = (String) XMLUtils.xpath( |
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171 doc, XPATH_ARTIFACT_NAME, XPathConstants.STRING); |
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172 |
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173 NodeList stateList = (NodeList) XMLUtils.xpath( |
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174 doc, XPATH_STATES, XPathConstants.NODESET); |
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175 |
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176 if (stateList == null) { |
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177 logger.warn("The artifact has no states configured."); |
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178 continue; |
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179 } |
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180 |
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181 int count = stateList.getLength(); |
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182 |
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183 logger.info( |
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184 "Artifact '" + artName + "' has " + count + " states."); |
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185 |
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186 for (int i = 0; i < count; i++) { |
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187 states.add(StateFactory.createState( |
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188 stateList.item(i))); |
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189 } |
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190 |
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191 engine.addStates(artName, states); |
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192 } |
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193 |
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194 context.put(FLYSContext.STATE_ENGINE_KEY, engine); |
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195 } |
295
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196 |
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197 |
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198 /** |
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199 * This method intializes the provided output generators. |
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200 * |
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201 * @param config the config document. |
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202 * @param context the FLYSContext. |
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203 */ |
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204 protected void configureOutGenerators(Document config, FLYSContext context){ |
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205 Map<String, Class> generators = new HashMap<String, Class>(); |
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206 |
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207 NodeList outGenerators = (NodeList) XMLUtils.xpath( |
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208 config, |
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209 XPATH_OUTPUT_GENERATORS, |
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210 XPathConstants.NODESET); |
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211 |
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212 int num = outGenerators == null ? 0 : outGenerators.getLength(); |
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213 |
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214 if (num == 0) { |
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215 logger.warn("No output generators configured in this application."); |
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216 return; |
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217 } |
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218 |
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219 logger.info("Found " + num + " configured output generators."); |
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220 |
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221 int idx = 0; |
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222 |
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223 for (int i = 0; i < num; i++) { |
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224 Node item = outGenerators.item(i); |
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225 |
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226 String name = (String) XMLUtils.xpath( |
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227 item, "@name", XPathConstants.STRING); |
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228 |
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229 String clazz = (String) XMLUtils.xpath( |
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230 item, "text()", XPathConstants.STRING); |
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231 |
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232 if (name == null || clazz == null) { |
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233 continue; |
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234 } |
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235 |
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236 try { |
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237 generators.put(name, Class.forName(clazz)); |
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238 |
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239 idx++; |
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240 } |
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241 catch (ClassNotFoundException cnfe) { |
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242 logger.warn(cnfe, cnfe); |
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243 } |
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244 } |
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245 |
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246 logger.info("Successfully loaded " + idx + " output generators."); |
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247 context.put(FLYSContext.OUTGENERATORS_KEY, generators); |
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248 } |
106
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249 } |
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250 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |