Mercurial > dive4elements > framework

annotate artifact-database/src/main/java/de/intevation/artifactdatabase/state/AbstractState.java @ 374:5420b96dd0b3

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Added a method StateEngine.getStateData() that returns the StateData of a specific Artifact. artifacts/trunk@3827 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Mon, 30 Jan 2012 13:17:32 +0000
parents 6072f84608c2
children fd32dc33a24c
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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31 import de.intevation.artifactdatabase.data.StateData;
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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 to the output nodes of the state configuration. */
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51 public static final String XPATH_OUTPUT_MODES = "outputmodes/outputmode";
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53 /** The XPath to the list of facets relative to the output mode it belongs
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54 * to. */
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55 public static final String XPATH_FACETS = "facets/facet";
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58 /** The logger that is used in this class. */
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59 private static Logger logger = Logger.getLogger(AbstractState.class);
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62 /** The ID of the state. */
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63 protected String id;
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64
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65 /** The description of the state. */
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66 protected String description;
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67
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68 /** The data provided by this state. */
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69 protected Map<String, StateData> data;
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70
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71 /** A list of output modes which are available for this state. */
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72 protected List<Output> outputs;
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75 public AbstractState() {
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76 outputs = new ArrayList<Output>();
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77 }
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80 /**
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81 * The default constructor.
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82 *
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83 * @param id The ID of the state.
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84 * @param description The description of the state.
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85 */
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86 public AbstractState(String id, String description) {
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87 super();
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88
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89 this.id = id;
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90 this.description = description;
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91 }
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93
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94 /**
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95 * Returns the ID of the state.
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96 *
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97 * @return the ID of the state.
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98 */
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99 public String getID() {
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100 return id;
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101 }
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102
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103
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104 /**
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105 * Set the ID of the state.
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106 *
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107 * @param id The ID of the state.
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108 */
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109 public void setID(String id) {
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110 this.id = id;
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111 }
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112
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113
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114 /**
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115 * Returns the description of the state.
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116 *
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117 * @return the description of the state.
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118 */
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119 public String getDescription() {
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120 return description;
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121 }
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122
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123
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124 /**
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125 * Set the description of the state.
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126 *
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127 * @param description The description of the state.
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128 */
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129 public void setDescription(String description) {
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130 this.description = description;
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131 }
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132
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133
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134 /**
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135 * Returns the data of the state.
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136 *
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137 * @return the data of the state.
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138 */
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139 public Map<String, StateData> getData() {
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140 return data;
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141 }
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142
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143
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144 /**
256
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145 * Returns a specific data object of the state.
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146 *
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147 * @param name The name of the data object.
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148 *
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149 * @return a data object of the state or null if no such data object exists.
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150 */
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151 public StateData getData(String name) {
373
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152 if (data != null) {
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153 return data.get(name);
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154 }
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155
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156 return null;
256
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157 }
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158
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159
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160 /**
105
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161 * Add new data to the state. NOTE: If there is already an object existing
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162 * with the key <i>name</i>, this object is overwritten by the new value.
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163 *
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164 * @param name The name of the data object.
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165 * @param StateData The data object.
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166 */
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167 public void addData(String name, StateData data) {
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168 if (this.data == null) {
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169 this.data = new HashMap<String, StateData>();
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170 }
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171
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172 this.data.put(name, data);
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173 }
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174
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175
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176 /**
209
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177 * Returns the list of possible outputs of this state. The list is empty
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178 * if no output is available for this state.
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179 *
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180 * @return a list of possible outputs of this state.
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181 */
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182 public List<Output> getOutputs() {
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183 return outputs;
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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 * Initialize the state based on the state node in the configuration.
105
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189 *
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190 * @param config The state configuration node.
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191 */
106
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192 public void setup(Node config) {
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193 logger.info("AbstractState.setup");
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194
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195 id = (String) XMLUtils.xpath(config, XPATH_ID, XPathConstants.STRING);
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196
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197 description = (String) XMLUtils.xpath(
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198 config, XPATH_DESCRIPTION, XPathConstants.STRING);
209
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199
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200 setupOutputs(config);
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201 }
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202
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203
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204 /**
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205 * This default implementation does nothing at all.
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206 *
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207 * @param orig
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208 * @param owner
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209 * @param context
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210 * @param callMeta
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211 */
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212 public void initialize(
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213 Artifact orig,
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214 Artifact owner,
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215 Object context,
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216 CallMeta callMeta
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217 ) {
363
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218 // do nothing.
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219 }
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220
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221
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222 /**
209
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223 * This method tries reading the available output nodes configured in the
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224 * state configuration and adds possible Outputs to the outputs list.
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225 *
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226 * @param config The state configuration node.
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227 */
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228 protected void setupOutputs(Node config) {
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229 NodeList outs = (NodeList) XMLUtils.xpath(
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230 config,
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231 XPATH_OUTPUT_MODES,
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232 XPathConstants.NODESET,
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233 ArtifactNamespaceContext.INSTANCE);
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234
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235 if (outs == null || outs.getLength() == 0) {
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236 return;
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237 }
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238
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239 int size = outs.getLength();
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240
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241 for (int i = 0; i < size; i++) {
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242 outputs.add(buildOutput(outs.item(i)));
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243 }
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244 }
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245
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246
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247 /**
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248 * A helper method that creates an Output object based on the <i>out</i>
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249 * node.
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250 *
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251 * @param out The output node configuration.
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252 *
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253 * @return an Output object.
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254 */
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255 protected Output buildOutput(Node out) {
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256 String name = XMLUtils.xpathString(
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257 out, "@name", ArtifactNamespaceContext.INSTANCE);
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258
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259 String desc = XMLUtils.xpathString(
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260 out, "@description", ArtifactNamespaceContext.INSTANCE);
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261
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262 String mimetype = XMLUtils.xpathString(
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263 out, "@mime-type", ArtifactNamespaceContext.INSTANCE);
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264
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265 String type = XMLUtils.xpathString(
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266 out, "@type", ArtifactNamespaceContext.INSTANCE);
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267
226
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268 if (name == null) {
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269 return null;
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270 }
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271
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272 NodeList facets = (NodeList) XMLUtils.xpath(
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273 out,
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274 XPATH_FACETS,
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275 XPathConstants.NODESET,
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276 ArtifactNamespaceContext.INSTANCE);
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277
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278 if (facets == null || facets.getLength() == 0) {
290
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279 return new DefaultOutput(name, desc, mimetype, type);
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280 }
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281
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282 int num = facets.getLength();
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283
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284 List<Facet> facetList = new ArrayList<Facet>(num);
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285
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286 for (int i = 0; i < num; i++) {
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287 Facet facet = buildFacet(facets.item(i));
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288
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289 if (facet != null) {
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290 facetList.add(facet);
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291 }
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292 }
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293
290
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294 return new DefaultOutput(name, desc, mimetype, facetList, type);
226
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295 }
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296
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297
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298 /**
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299 * A helper method that creates a Facet object based on the <i>facet</i>
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300 * node.
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301 *
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302 * @param facet The facet node.
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303 *
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304 * @return a Facet object or null if no valid Facet was found.
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305 */
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306 protected Facet buildFacet(Node facet) {
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307 String name = XMLUtils.xpathString(
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308 facet, "@name", ArtifactNamespaceContext.INSTANCE);
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309
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310 String desc = XMLUtils.xpathString(
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311 facet, "@description", ArtifactNamespaceContext.INSTANCE);
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312
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313 return name != null ? new DefaultFacet(name, desc) : null;
106
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314 }
105
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315
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316
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317 /**
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318 * Describes the UI of the state. This method needs to be implemented by
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319 * concrete subclasses.
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320 *
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321 * @param artifact A reference to the artifact this state belongs to.
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322 * @param document Describe doucment.
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323 * @param rootNode Parent node for all new elements.
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324 * @param context The CallContext.
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325 * @param uuid The uuid of an artifact.
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326 */
205
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327 public abstract Element describe(
244
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328 Artifact artifact,
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329 Document document,
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330 Node rootNode,
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331 CallContext context,
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332 String uuid
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333 );
327
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334
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335
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336 @Override
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337 public void endOfLife(Artifact artifact, Object context) {
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338 // nothing to do here
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339 }
105
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340 }
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341 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org