Mercurial > dive4elements > framework

annotate artifact-database/src/main/java/de/intevation/artifactdatabase/state/AbstractState.java @ 425:ad74e1ba88ba

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Allow to add Output objects to a state manually artifacts/trunk@5603 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Bjoern Ricks <bjoern.ricks@intevation.de>
date Wed, 26 Sep 2012 13:26:38 +0000
parents f367be55dd35
children 402cd5464723
rev   line source
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1 /*
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2 * Copyright (c) 2011 by Intevation GmbH
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3 *
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4 * This program is free software under the LGPL (>=v2.1)
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5 * Read the file LGPL.txt coming with the software for details
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6 * or visit http://www.gnu.org/licenses/ if it does not exist.
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7 */
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8 package de.intevation.artifactdatabase.state;
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9
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10 import java.util.ArrayList;
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11 import java.util.HashMap;
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12 import java.util.List;
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13 import java.util.Map;
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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
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19 import org.w3c.dom.Document;
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20 import org.w3c.dom.Element;
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21 import org.w3c.dom.Node;
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22 import org.w3c.dom.NodeList;
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23
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24 import de.intevation.artifacts.Artifact;
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25 import de.intevation.artifacts.ArtifactNamespaceContext;
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26 import de.intevation.artifacts.CallContext;
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27 import de.intevation.artifacts.CallMeta;
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29 import de.intevation.artifacts.common.utils.XMLUtils;
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30
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31 import de.intevation.artifactdatabase.data.StateData;
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32
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33
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34 /**
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35 * An abstract implementation of a {@link State}. It implements some basic
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36 * methods that return the id, description and data. The methods
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37 * <code>describe()</code> and <code>setup()</code> depend on the concrete class
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38 * and need to be implemented by those.
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39 */
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40 public abstract class AbstractState implements State {
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41
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42 /** The XPath to the ID of the state relative to the state node in the
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43 * configuration. */
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44 public static final String XPATH_ID = "@id";
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45
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46 /** The XPath to the description of the state relative to the state node in
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47 * the configuration. */
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48 public static final String XPATH_DESCRIPTION = "@description";
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49
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50 /** The XPath that points to the help text.*/
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51 public static final String XPATH_HELP_TEXT = "@helpText";
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52
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53 /** The XPath to the output nodes of the state configuration. */
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54 public static final String XPATH_OUTPUT_MODES = "outputmodes/outputmode";
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56 /** The XPath to the list of facets relative to the output mode it belongs
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57 * to. */
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58 public static final String XPATH_FACETS = "facets/facet";
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59
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61 /** The logger that is used in this class. */
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62 private static Logger logger = Logger.getLogger(AbstractState.class);
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65 /** The ID of the state. */
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66 protected String id;
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67
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68 /** The description of the state. */
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69 protected String description;
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70
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71 /** The help text for this state.*/
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72 protected String helpText;
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73
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74 /** The data provided by this state. */
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75 protected Map<String, StateData> data;
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76
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77 /** A list of output modes which are available for this state. */
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78 protected List<Output> outputs;
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81 public AbstractState() {
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82 outputs = new ArrayList<Output>();
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83 }
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86 /**
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87 * The default constructor.
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88 *
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89 * @param id The ID of the state.
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90 * @param description The description of the state.
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91 */
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92 public AbstractState(String id, String description) {
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93 super();
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95 this.id = id;
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96 this.description = description;
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97 }
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100 public AbstractState(String id, String description, String helpText) {
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101 this(id, description);
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102 this.helpText = helpText;
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103 }
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106 /**
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107 * Returns the ID of the state.
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108 *
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109 * @return the ID of the state.
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110 */
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111 public String getID() {
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112 return id;
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113 }
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114
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115
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116 /**
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117 * Set the ID of the state.
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118 *
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119 * @param id The ID of the state.
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120 */
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121 public void setID(String id) {
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122 this.id = id;
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123 }
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124
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125
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126 /**
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127 * Returns the description of the state.
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128 *
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129 * @return the description of the state.
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130 */
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131 public String getDescription() {
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132 return description;
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133 }
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136 /**
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137 * Set the description of the state.
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138 *
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139 * @param description The description of the state.
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140 */
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141 public void setDescription(String description) {
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142 this.description = description;
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143 }
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144
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145
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146 /**
386
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147 * Returns the help text of this state.
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148 *
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149 * @return the help text.
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150 */
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151 public String getHelpText() {
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152 return helpText;
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153 }
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154
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155
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156 /**
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157 * Set the help text for this state.
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158 *
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159 * @param helpText The help text.
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160 */
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161 public void setHelpText(String helpText) {
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162 this.helpText = helpText;
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163 }
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164
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165
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166 /**
105
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167 * Returns the data of the state.
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168 *
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169 * @return the data of the state.
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170 */
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171 public Map<String, StateData> getData() {
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172 return data;
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173 }
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174
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175
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176 /**
256
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177 * Returns a specific data object of the state.
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178 *
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179 * @param name The name of the data object.
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180 *
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181 * @return a data object of the state or null if no such data object exists.
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182 */
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183 public StateData getData(String name) {
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184 if (data != null) {
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185 return data.get(name);
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186 }
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187
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188 return null;
256
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189 }
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190
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191
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192 /**
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193 * Add new data to the state. NOTE: If there is already an object existing
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194 * with the key <i>name</i>, this object is overwritten by the new value.
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195 *
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196 * @param name The name of the data object.
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197 * @param data The data object.
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198 */
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199 public void addData(String name, StateData data) {
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200 if (this.data == null) {
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201 this.data = new HashMap<String, StateData>();
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202 }
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203
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204 this.data.put(name, data);
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205 }
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206
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207
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208 /**
209
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209 * Returns the list of possible outputs of this state. The list is empty
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210 * if no output is available for this state.
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211 *
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212 * @return a list of possible outputs of this state.
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213 */
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214 public List<Output> getOutputs() {
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215 return outputs;
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216 }
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217
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218
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219 /**
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220 * Initialize the state based on the state node in the configuration.
105
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221 *
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222 * @param config The state configuration node.
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223 */
106
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224 public void setup(Node config) {
226
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225 logger.info("AbstractState.setup");
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226
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227 id = (String) XMLUtils.xpath(config, XPATH_ID, XPathConstants.STRING);
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228
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229 description = (String) XMLUtils.xpath(
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230 config, XPATH_DESCRIPTION, XPathConstants.STRING);
209
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231
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232 helpText = (String) XMLUtils.xpath(
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233 config, XPATH_HELP_TEXT, XPathConstants.STRING);
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234
209
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235 setupOutputs(config);
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236 }
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237
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238
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239 /**
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240 * This default implementation does nothing at all.
365
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241 *
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242 * @param orig
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243 * @param owner
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244 * @param context
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245 * @param callMeta
363
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246 */
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247 public void initialize(
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248 Artifact orig,
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249 Artifact owner,
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250 Object context,
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251 CallMeta callMeta
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252 ) {
363
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253 // do nothing.
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254 }
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255
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256
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257 /**
209
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258 * This method tries reading the available output nodes configured in the
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259 * state configuration and adds possible Outputs to the outputs list.
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260 *
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261 * @param config The state configuration node.
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262 */
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263 protected void setupOutputs(Node config) {
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264 NodeList outs = (NodeList) XMLUtils.xpath(
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265 config,
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266 XPATH_OUTPUT_MODES,
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267 XPathConstants.NODESET,
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268 ArtifactNamespaceContext.INSTANCE);
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269
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270 if (outs == null || outs.getLength() == 0) {
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271 return;
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272 }
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273
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274 int size = outs.getLength();
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275
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276 for (int i = 0; i < size; i++) {
425
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277 addOutput(buildOutput(outs.item(i)));
209
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278 }
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279 }
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280
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281 /**
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282 * This methods allows subclasses to manually add outputs
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283 *
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284 * @param out The output to add
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285 */
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286 protected void addOutput(Output out) {
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287 outputs.add(out);
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288 }
209
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289
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290 /**
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291 * A helper method that creates an Output object based on the <i>out</i>
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292 * node.
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293 *
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294 * @param out The output node configuration.
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295 *
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296 * @return an Output object.
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297 */
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298 protected Output buildOutput(Node out) {
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299 String name = XMLUtils.xpathString(
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300 out, "@name", ArtifactNamespaceContext.INSTANCE);
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301
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302 String desc = XMLUtils.xpathString(
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303 out, "@description", ArtifactNamespaceContext.INSTANCE);
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304
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305 String mimetype = XMLUtils.xpathString(
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306 out, "@mime-type", ArtifactNamespaceContext.INSTANCE);
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307
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308 String type = XMLUtils.xpathString(
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309 out, "@type", ArtifactNamespaceContext.INSTANCE);
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310
226
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311 if (name == null) {
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312 return null;
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313 }
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314
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315 NodeList facets = (NodeList) XMLUtils.xpath(
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316 out,
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317 XPATH_FACETS,
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318 XPathConstants.NODESET,
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319 ArtifactNamespaceContext.INSTANCE);
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320
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321 if (facets == null || facets.getLength() == 0) {
290
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322 return new DefaultOutput(name, desc, mimetype, type);
226
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323 }
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324
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325 int num = facets.getLength();
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326
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327 List<Facet> facetList = new ArrayList<Facet>(num);
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328
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329 for (int i = 0; i < num; i++) {
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330 Facet facet = buildFacet(facets.item(i));
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331
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332 if (facet != null) {
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333 facetList.add(facet);
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334 }
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335 }
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336
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337 return new DefaultOutput(name, desc, mimetype, facetList, type);
226
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338 }
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339
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340
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341 /**
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342 * A helper method that creates a Facet object based on the <i>facet</i>
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343 * node.
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344 *
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345 * @param facet The facet node.
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346 *
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347 * @return a Facet object or null if no valid Facet was found.
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348 */
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349 protected Facet buildFacet(Node facet) {
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350 String name = XMLUtils.xpathString(
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351 facet, "@name", ArtifactNamespaceContext.INSTANCE);
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352
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353 String desc = XMLUtils.xpathString(
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354 facet, "@description", ArtifactNamespaceContext.INSTANCE);
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355
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356 return name != null ? new DefaultFacet(name, desc) : null;
106
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357 }
105
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358
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359
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360 /**
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361 * Describes the UI of the state. This method needs to be implemented by
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362 * concrete subclasses.
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363 *
244
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364 * @param artifact A reference to the artifact this state belongs to.
105
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365 * @param document Describe doucment.
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366 * @param rootNode Parent node for all new elements.
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367 * @param context The CallContext.
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368 * @param uuid The uuid of an artifact.
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369 */
205
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370 public abstract Element describe(
244
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371 Artifact artifact,
105
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372 Document document,
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373 Node rootNode,
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374 CallContext context,
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375 String uuid
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376 );
327
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377
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378
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379 @Override
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380 public void endOfLife(Artifact artifact, Object context) {
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381 // nothing to do here
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382 }
105
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383 }
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384 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org