Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/context/FLYSContextFactory.java @ 341:eca7892bf8ff

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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>
date Thu, 21 Apr 2011 08:47:39 +0000
parents 53c155bfde07
children 88a669785863
rev   line source
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5864c41219db 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";
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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
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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
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112 if (list == null) {
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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++) {
111
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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);
106
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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 }
107
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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
5864c41219db Initializes a TransitionEngine storing all transitions for each artifact at the application start.
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321 }
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322 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org