Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/artifacts/GNVArtifactBase.java @ 58:f31343d80d53

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Artifact.advance initial implementiert gnv-artifacts/trunk@40 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Tim Englich <tim.englich@intevation.de>
date Tue, 08 Sep 2009 14:07:59 +0000
parents f01592cd6419
children 2c5d8f5bced1
rev   line source
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1 /**
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2 *
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3 */
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4 package de.intevation.gnv.artifacts;
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5
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6 import java.util.ArrayList;
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7 import java.util.Collection;
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8 import java.util.HashMap;
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9 import java.util.Iterator;
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10 import java.util.Map;
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11
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12 import org.apache.log4j.Logger;
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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.artifactdatabase.Config;
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19 import de.intevation.artifactdatabase.DefaultArtifact;
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20 import de.intevation.gnv.artifacts.context.GNVArtifactContext;
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21 import de.intevation.gnv.transition.DefaultInputData;
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22 import de.intevation.gnv.transition.InputData;
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23 import de.intevation.gnv.transition.InputValue;
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24 import de.intevation.gnv.transition.Transition;
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25 import de.intevation.gnv.transition.TransitionFactory;
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26 import de.intevation.gnv.transition.exception.TransitionException;
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27
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28 /**
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29 * @author Tim Englich <tim.englich@intevation.de>
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30 *
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31 */
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32 public abstract class GNVArtifactBase extends DefaultArtifact {
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33 /**
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34 * the logger, used to log exceptions and additonaly information
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35 */
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36 private static Logger log = Logger.getLogger(GNVArtifactBase.class);
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37 /**
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38 * The UID of this Class
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39 */
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40 private static final long serialVersionUID = -8907096744400741458L;
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41
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42 /**
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43 * The Identifier for the Replacement of the Artifactname
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44 */
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45 public static final String XPATH_IDENTIFIER_REPLACE = "IDENTIFIER";
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46
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47 /**
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48 * The XPATH to the XML-Fragment that should be used for the Configuration
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49 */
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50 public static final String XPATH_ARTIFACT_CONFIGURATION= "/artifact-database/artifacts/artifact[@name='"+XPATH_IDENTIFIER_REPLACE+"']";
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51
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53 /**
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54 * The current Transition
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55 */
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56 protected Transition current = null;
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57
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58 /**
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59 * The Transitions that can be used
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60 */
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61 protected Map<String, Transition> transitions = null;
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62
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63 /**
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64 * The Name of the Artifact
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65 */
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66 protected String name = null;
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67
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68 /**
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69 * Constructor
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70 */
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71 public GNVArtifactBase() {
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72 super();
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73 }
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74
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75 /**
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76 * @see de.intevation.artifactdatabase.DefaultArtifact#advance(org.w3c.dom.Document, java.lang.Object)
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77 */
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78 @Override
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79 public Document advance(Document target, Object context) {
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80 Document result = super.newDocument();
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81 if (this.current != null){
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82 String transitionName = this.readTransitionName(target);
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83 if (this.current.isTransitionReachable(transitionName)){
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84 // 1. Pr�fung ob Transition valide ist
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85 if (this.current.validate()){
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86
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87 try {
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88 Transition nextStep = this.transitions.get(transitionName);
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89 // 2.Ergebnisse Berechnen
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90 this.current.advance();
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91 // 3. Ergebnisse �bergeben
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92 nextStep.setDescibeData(this.current.getDescibeData());
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93 // 4. Umschalten auf neue Transistion
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94 this.current = nextStep;
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95 } catch (TransitionException e) {
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96 log.error(e,e);
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97 // TODO: Errormmessage senden.
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98 }
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99
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100 }else{
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101 log.error("Advance nicht m�glich, da die Bedingungen f�r den �bergang " +
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102 "in den neuen Zustand noch nicht gegeben ist.");
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103 // TODO: Errormmessage senden.
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104 }
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105
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106 }else{
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107 log.error("Transitions�bergang wird nicht unterst�tzt.");
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108 // TODO: Errormmessage senden.
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109 }
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110 }else{
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111 log.error("Kein Transitionsschritt aktiviert.");
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112 // TODO: Errormmessage senden.
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113 }
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114 return result;
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115 }
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116
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117 protected String readTransitionName(Document document) {
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118 String returnValue = Config.getStringXPath(document, "action/target/@name");
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119 return returnValue;
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120 }
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121
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122 protected Node getConfigurationFragment(Document document){
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123 log.debug("GNVArtifactBase.getConfigurationFragment");
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124 String xpathQuery = XPATH_ARTIFACT_CONFIGURATION.replaceAll(XPATH_IDENTIFIER_REPLACE, this.name);
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125 log.debug(xpathQuery);
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126 return Config.getNodeXPath(document,xpathQuery);
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127 }
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128
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129 /**
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130 * @see de.intevation.artifactdatabase.DefaultArtifact#feed(org.w3c.dom.Document, java.lang.Object)
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131 */
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132 @Override
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133 public Document feed(Document target, Object context) {
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134 Document result = super.newDocument();
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135 try {
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136 if (this.current != null){
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137 this.current.putInputData(this.parseInputData(target));
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138 // TODO Ergebnisdokument erzeugen.
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139 }
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140 } catch (TransitionException e) {
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141 log.error(e,e);
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142 //TODO: Fehlerdokumenterzeugen.
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143 }
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144 return result;
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145 }
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146
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147 /**
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148 * @see de.intevation.artifactdatabase.DefaultArtifact#setup(java.lang.String, java.lang.Object)
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149 */
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150 @Override
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151 public void setup(String identifier, Object context) {
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152 log.debug("GNVArtifactBase.setup");
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153 super.setup(identifier, context);
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154 if (context instanceof GNVArtifactContext){
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155 GNVArtifactContext gnvContext = (GNVArtifactContext)context;
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156 Document doc = gnvContext.getConfig();
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157 Node artifactNode = this.getConfigurationFragment(doc);
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158 NodeList transitionList = Config.getNodeSetXPath(artifactNode, "transitions/transition");
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159 this.transitions = new HashMap<String, Transition>(transitionList.getLength());
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160 for (int i = 0 ; i < transitionList.getLength(); i++){
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161 Transition tmpTransition = TransitionFactory.getInstance().createTransition(transitionList.item(i));
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162 if (tmpTransition != null){
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163 this.transitions.put(tmpTransition.getID(), tmpTransition);
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164 if (this.current == null){
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165 this.current = tmpTransition;
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166 }
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167 }
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168 }
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169
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170 }
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171 }
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172
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173
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174 protected Document createDescibeOutput(){
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175 log.debug("GNVArtifactBase.createDescibeOutput");
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176 Document document = super.newDocument();
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177 Element rootNode = this.createRootNode(document);
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178 this.createHeader(rootNode, document, "describe");
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179 this.createCurrentState(rootNode, document);
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180 this.createReachableStates(rootNode, document);
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181 this.createModel(rootNode, document);
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182 this.createUserInterface(rootNode, document);
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183
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184 return document;
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185 }
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186
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187 protected Element createRootNode(Document document){
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188 Element rootNode = createElement(document,"result");
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189 document.appendChild(rootNode);
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190 return rootNode;
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191 }
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192
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193 protected void createHeader(Element parent, Document document, String documentType){
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194 Element typeNode = createElement(document,"type");
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195 typeNode.setAttribute("name", documentType);
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196 parent.appendChild(typeNode);
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197
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198 Element uuidNode = createElement(document,"uuid");
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199 uuidNode.setAttribute("value", super.identifier);
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200 parent.appendChild(uuidNode);
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201
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202 Element hashNode = createElement(document,"hash");
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203 hashNode.setAttribute("value", this.hash());
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204 parent.appendChild(hashNode);
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205
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206
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207 }
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208 protected void createReachableStates(Element parent,Document document){
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209 Element stateNode = createElement(document,"reachable-states");
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210 if (this.current != null){
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211 Iterator<String> states = this.current.reachableTransitions().iterator();
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212 while(states.hasNext()){
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213 String value = states.next();
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214 Element currentNode = createElement(document,"state");
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215 currentNode.setAttribute("name", value);
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216 currentNode.setAttribute("description", transitions.get(value).getDescription());
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217 stateNode.appendChild(currentNode);
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218 }
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219 }
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220 parent.appendChild(stateNode);
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221 }
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222
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223 protected void createCurrentState(Element parent, Document document){
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224 Element stateNode = createElement(document,"state");
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225 stateNode.setAttribute("name", this.current.getID());
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226 stateNode.setAttribute("description", this.current.getDescription());
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227 parent.appendChild(stateNode);
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228 }
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229
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230
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231 protected void createModel(Element parent, Document document){
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232 Element modelNode = createElement(document,"model");
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233 if (this.current != null){
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234 Collection<InputValue> inputValues = this.current.getRequiredInputValues();
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235 if (inputValues != null){
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236 Iterator<InputValue> it = inputValues.iterator();
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237 while(it.hasNext()){
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238 InputValue inputValue = it.next();
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239 Element inputNode = createElement(document,"input");
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240 inputNode.setAttribute("name", inputValue.getName());
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241 inputNode.setAttribute("type", inputValue.getType());
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242 modelNode.appendChild(inputNode);
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243 }
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244 }
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245 }
54
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246 parent.appendChild(modelNode);
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247 }
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248
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249 protected void createUserInterface(Element parent, Document document){
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250 Element uiNode = createElement(document,"ui");
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251
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252 // TODO mit leben f�llen.
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253
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254 parent.appendChild(uiNode);
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255 }
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256
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257 protected void createOutputs(Element parent, Document document){
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258 Element outputsNode = createElement(document,"outputs");
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259
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260 // TODO mit leben f�llen.
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261
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262 parent.appendChild(outputsNode);
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263 }
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264
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265 /**
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266 * @param document
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267 * @return
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268 */
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269 private Element createElement(Document document, String name) {
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270 Element node = document.createElementNS(DefaultArtifact.NAMESPACE_URI, name);
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271 node.setPrefix(DefaultArtifact.NAMESPACE_PREFIX);
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272 return node;
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273 }
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274
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275 protected Collection<InputData> parseInputData(Document document){
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276 log.debug("GNVArtifactBase.parseInputData");
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277 Collection<InputData> returnValue = null;
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278
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279 NodeList inputElemets = Config.getNodeSetXPath(document, "action/data/input");
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280 if(inputElemets != null){
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281 returnValue = new ArrayList<InputData>(inputElemets.getLength());
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282 for (int i = 0; i < inputElemets.getLength(); i++){
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283 Node inputDataNode = inputElemets.item(i);
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284 InputData inputData = new DefaultInputData(Config.getStringXPath(inputDataNode,"@name"), Config.getStringXPath(inputDataNode,"@value"));
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285 log.debug(inputData.toString());
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286 returnValue.add(inputData);
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287 }
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288 }
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289 return returnValue;
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290 }
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291
52
4d6a82b96059 First Implementation of the GNV-Artifacts
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292
4d6a82b96059 First Implementation of the GNV-Artifacts
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293 }
http://dive4elements.wald.intevation.org