Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/artifacts/GNVArtifactBase.java @ 74:3d73718aa1b8

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Make the Interfaces Serializable to make them usable in the Artifactdatabase gnv-artifacts/trunk@80 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Tim Englich <tim.englich@intevation.de>
date Mon, 14 Sep 2009 10:37:00 +0000
parents 504570de21fd
children 0e38f512f7e4
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.io.IOException;
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7 import java.io.OutputStream;
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8 import java.util.ArrayList;
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9 import java.util.Collection;
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10 import java.util.HashMap;
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11 import java.util.Iterator;
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12 import java.util.Map;
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13
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14 import javax.xml.XMLConstants;
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15 import javax.xml.xpath.XPathConstants;
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16
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17 import org.apache.log4j.Logger;
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18 import org.w3c.dom.Document;
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19 import org.w3c.dom.Element;
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20 import org.w3c.dom.Node;
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21 import org.w3c.dom.NodeList;
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22
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23 import de.intevation.artifactdatabase.Config;
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24 import de.intevation.artifactdatabase.DefaultArtifact;
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25 import de.intevation.artifactdatabase.XMLUtils;
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26 import de.intevation.artifacts.ArtifactFactory;
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27 import de.intevation.artifacts.ArtifactNamespaceContext;
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28 import de.intevation.artifacts.CallContext;
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29 import de.intevation.gnv.artifacts.context.GNVArtifactContext;
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30 import de.intevation.gnv.transition.DefaultInputData;
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31 import de.intevation.gnv.transition.InputData;
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32 import de.intevation.gnv.transition.InputValue;
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33 import de.intevation.gnv.transition.OutputMode;
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34 import de.intevation.gnv.transition.OutputTransition;
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35 import de.intevation.gnv.transition.Transition;
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36 import de.intevation.gnv.transition.TransitionFactory;
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37 import de.intevation.gnv.transition.exception.TransitionException;
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38 import de.intevation.gnv.utils.ArtifactXMLUtilities;
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40 /**
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41 * @author Tim Englich <tim.englich@intevation.de>
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42 *
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43 */
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44 public abstract class GNVArtifactBase extends DefaultArtifact {
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45 /**
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46 * the logger, used to log exceptions and additonaly information
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47 */
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48 private static Logger log = Logger.getLogger(GNVArtifactBase.class);
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49 /**
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50 * The UID of this Class
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51 */
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52 private static final long serialVersionUID = -8907096744400741458L;
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54 /**
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55 * The Identifier for the Replacement of the Artifactname
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56 */
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57 public static final String XPATH_IDENTIFIER_REPLACE = "IDENTIFIER";
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59 /**
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60 * The XPATH to the XML-Fragment that should be used for the Configuration
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61 */
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62 public static final String XPATH_ARTIFACT_CONFIGURATION= "/artifact-database/artifacts/artifact[@name='"+XPATH_IDENTIFIER_REPLACE+"']";
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65 /**
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66 * The current Transition
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67 */
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68 protected Transition current = null;
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69
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70 /**
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71 * The Transitions that can be used
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72 */
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73 protected Map<String, Transition> transitions = null;
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74
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75 /**
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76 * The Name of the Artifact
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77 */
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78 protected String name = null;
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79
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80 private ArtifactXMLUtilities xmlUtilities = new ArtifactXMLUtilities();
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81
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82 /**
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83 * Constructor
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84 */
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85 public GNVArtifactBase() {
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86 super();
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87 }
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88
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89 /**
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90 * @see de.intevation.artifactdatabase.DefaultArtifact#advance(org.w3c.dom.Document, de.intevation.artifacts.CallContext)
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91 */
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92 @Override
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93 public Document advance(Document target, CallContext context) {
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94 Document result = XMLUtils.newDocument();
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95 if (this.current != null){
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96 String transitionName = this.readTransitionName(target);
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97 if (this.current.isTransitionReachable(transitionName)){
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98 // 1. Pr�fung ob Transition valide ist
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99 if (this.current.validate()){
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100
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101 try {
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102 Transition nextStep = this.transitions.get(transitionName);
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103 // 2.Ergebnisse Berechnen
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104 this.current.advance();
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105 // 3. Ergebnisse �bergeben
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106 nextStep.setDescibeData(this.current.getDescibeData());
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107 nextStep.putInputData(this.current.getInputData());
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108 // 4. Umschalten auf neue Transistion
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109 this.current = nextStep;
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110 } catch (TransitionException e) {
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111 log.error(e,e);
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112 // TODO: Errormmessage senden.
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113 }
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114
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115 }else{
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116 log.error("Advance nicht m�glich, da die Bedingungen f�r den �bergang " +
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117 "in den neuen Zustand noch nicht gegeben ist.");
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118 // TODO: Errormmessage senden.
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119 }
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120
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121 }else{
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122 log.error("Transitions�bergang wird nicht unterst�tzt.");
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123 // TODO: Errormmessage senden.
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124 }
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125 }else{
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126 log.error("Kein Transitionsschritt aktiviert.");
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127 // TODO: Errormmessage senden.
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128 }
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129 return result;
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130 }
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131
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132 protected String readTransitionName(Document document) {
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133 String returnValue = Config.getStringXPath(document, "action/target/@name");
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134 return returnValue;
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135 }
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136
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137 protected Node getConfigurationFragment(Document document){
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138 log.debug("GNVArtifactBase.getConfigurationFragment");
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139 String xpathQuery = XPATH_ARTIFACT_CONFIGURATION.replaceAll(XPATH_IDENTIFIER_REPLACE, this.name);
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140 log.debug(xpathQuery);
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141 return Config.getNodeXPath(document,xpathQuery);
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142 }
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143
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144 /**
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145 * @see de.intevation.artifactdatabase.DefaultArtifact#feed(org.w3c.dom.Document, de.intevation.artifacts.CallContext)
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146 */
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147 @Override
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148 public Document feed(Document target, CallContext context) {
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149 Document result = XMLUtils.newDocument();
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150 try {
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151 if (this.current != null){
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152 this.current.putInputData(this.parseInputData(target));
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153 // TODO Ergebnisdokument erzeugen.
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154 }
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155 } catch (TransitionException e) {
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156 log.error(e,e);
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157 //TODO: Fehlerdokumenterzeugen.
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158 }
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159 return result;
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160 }
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161
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162 /**
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163 * @see de.intevation.artifactdatabase.DefaultArtifact#setup(java.lang.String, java.lang.Object)
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164 */
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165 @Override
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166 public void setup(String identifier, ArtifactFactory factory, Object context) {
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167 log.debug("GNVArtifactBase.setup");
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168 super.setup(identifier, factory, context);
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169 if (context instanceof GNVArtifactContext){
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170 GNVArtifactContext gnvContext = (GNVArtifactContext)context;
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171 Document doc = gnvContext.getConfig();
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172 Node artifactNode = this.getConfigurationFragment(doc);
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173 NodeList transitionList = Config.getNodeSetXPath(artifactNode, "transitions/transition");
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174 this.transitions = new HashMap<String, Transition>(transitionList.getLength());
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175 for (int i = 0 ; i < transitionList.getLength(); i++){
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176 Transition tmpTransition = TransitionFactory.getInstance().createTransition(transitionList.item(i));
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177 if (tmpTransition != null){
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178 this.transitions.put(tmpTransition.getID(), tmpTransition);
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179 if (this.current == null){
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180 this.current = tmpTransition;
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181 }
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182 }
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183 }
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184
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185 }
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186 }
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187
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188
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189 protected Document createDescibeOutput(){
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190 log.debug("GNVArtifactBase.createDescibeOutput");
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191 Document document = XMLUtils.newDocument();
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192 Element rootNode = this.createRootNode(document);
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193 this.createHeader(rootNode, document, "describe");
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194 this.createOutputs(rootNode, document);
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195 this.createCurrentState(rootNode, document);
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196 this.createReachableStates(rootNode, document);
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197 this.createModel(rootNode, document);
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198 this.createUserInterface(rootNode, document);
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199
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200 return document;
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201 }
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202
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203 protected Element createRootNode(Document document){
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204 Element rootNode = xmlUtilities.createArtifactElement(document,"result");
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205 document.appendChild(rootNode);
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206 return rootNode;
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207 }
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208
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209 protected void createHeader(Element parent, Document document, String documentType){
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210 Element typeNode = xmlUtilities.createArtifactElement(document,"type");
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211 typeNode.setAttribute("name", documentType);
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212 parent.appendChild(typeNode);
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213
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214 Element uuidNode = xmlUtilities.createArtifactElement(document,"uuid");
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215 uuidNode.setAttribute("value", super.identifier);
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216 parent.appendChild(uuidNode);
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217
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218 Element hashNode = xmlUtilities.createArtifactElement(document,"hash");
54
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219 hashNode.setAttribute("value", this.hash());
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220 parent.appendChild(hashNode);
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221
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222
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223 }
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224 protected void createReachableStates(Element parent,Document document){
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225 Element stateNode = xmlUtilities.createArtifactElement(document,"reachable-states");
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226 if (this.current != null){
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227 Iterator<String> states = this.current.reachableTransitions().iterator();
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228 while(states.hasNext()){
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229 String value = states.next();
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230 Element currentNode = xmlUtilities.createArtifactElement(document,"state");
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231 currentNode.setAttribute("name", value);
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232 currentNode.setAttribute("description", transitions.get(value).getDescription());
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233 stateNode.appendChild(currentNode);
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234 }
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235 }
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236 parent.appendChild(stateNode);
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237 }
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238
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239 protected void createCurrentState(Element parent, Document document){
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240 Element stateNode = xmlUtilities.createArtifactElement(document,"state");
54
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241 stateNode.setAttribute("name", this.current.getID());
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242 stateNode.setAttribute("description", this.current.getDescription());
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243 parent.appendChild(stateNode);
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244 }
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245
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246
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247 protected void createModel(Element parent, Document document){
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248 Element modelNode = xmlUtilities.createArtifactElement(document,"model");
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249 if (this.current != null){
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250 Collection<InputValue> inputValues = this.current.getRequiredInputValues();
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251 if (inputValues != null){
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252 Iterator<InputValue> it = inputValues.iterator();
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253 while(it.hasNext()){
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254 InputValue inputValue = it.next();
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255 Element inputNode = xmlUtilities.createArtifactElement(document,"input");
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256 inputNode.setAttribute("name", inputValue.getName());
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257 inputNode.setAttribute("type", inputValue.getType());
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258 modelNode.appendChild(inputNode);
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259 }
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260 }
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261 }
54
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262 parent.appendChild(modelNode);
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263 }
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264
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265 protected void createUserInterface(Element parent, Document document){
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266 Element uiNode = xmlUtilities.createArtifactElement(document,"ui");
54
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267
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diff changeset
268 if (this.current != null){
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269 this.current.describe(document, uiNode);
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270 }
54
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271
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272 parent.appendChild(uiNode);
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273 }
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274
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275 protected void createOutputs(Element parent, Document document){
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276 log.debug("GNVArtifactBase.createOutputs");
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277 Element outputsNode = xmlUtilities.createArtifactElement(document,"outputs");
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278 if (this.current instanceof OutputTransition){
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279 Collection<OutputMode> outputModes = ((OutputTransition)this.current).getOutputModes();
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280 if (outputModes != null){
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281 Iterator<OutputMode> it = outputModes.iterator();
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282 while(it.hasNext()){
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283 OutputMode outputMode = it.next();
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284 log.debug("Write Outputnode for "+ outputMode.toString());
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285 Element outputModeNode = xmlUtilities.createArtifactElement(document,"output");
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286 outputModeNode.setAttribute("name", outputMode.getName());
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287 outputModeNode.setAttribute("description", outputMode.getDescription());
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288 outputModeNode.setAttribute("mime-type", outputMode.getMimeType());
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289 outputsNode.appendChild(outputModeNode);
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290 }
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291 }else{
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292 log.warn("No Outputmodes given.");
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293 }
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294 }
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295 parent.appendChild(outputsNode);
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296 }
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297
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298
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299 protected Collection<InputData> parseInputData(Document document){
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300 log.debug("GNVArtifactBase.parseInputData");
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301 Collection<InputData> returnValue = null;
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302
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303 log.debug(new ArtifactXMLUtilities().writeDocument2String(document));
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304
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305 NodeList inputElemets = (NodeList)XMLUtils.xpath(document, "/action/data/input",XPathConstants.NODESET, ArtifactNamespaceContext.INSTANCE);//Config.getNodeSetXPath(document, "");
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306 if(inputElemets != null){
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307 returnValue = new ArrayList<InputData>(inputElemets.getLength());
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308 for (int i = 0; i < inputElemets.getLength(); i++){
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309 Node inputDataNode = inputElemets.item(i);
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310 InputData inputData = new DefaultInputData(Config.getStringXPath(inputDataNode,"@name"), Config.getStringXPath(inputDataNode,"@value"));
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311 log.debug(inputData.toString());
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312 returnValue.add(inputData);
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313 }
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314 }
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315 return returnValue;
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316 }
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317 /**
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318 * @see de.intevation.artifactdatabase.DefaultArtifact#out(org.w3c.dom.Document, java.lang.Object)
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319 */
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320
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321
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322 /**
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323 * @see de.intevation.artifactdatabase.DefaultArtifact#out(org.w3c.dom.Document, java.io.OutputStream, de.intevation.artifacts.CallContext)
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324 */
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325 @Override
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326 public void out(Document format, OutputStream outputStream, CallContext context)
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327 throws IOException {
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328 log.debug("TGNVArtifactBase.out");
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329 try {
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330
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331 if (current != null && current instanceof OutputTransition){
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332 ((OutputTransition)current).out(this.readOutputType(format), outputStream);
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333 }
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334 } catch (TransitionException e) {
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335 log.error(e,e);
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336 }
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337 }
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338
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339 protected String readOutputType(Document document){
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340 String value = Config.getStringXPath(document,"action/out/@name");
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341 return value;
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342 }
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343 }
http://dive4elements.wald.intevation.org