Mercurial > dive4elements > framework

annotate artifact-database/src/main/java/de/intevation/artifactdatabase/state/AbstractState.java @ 232:202b6ae2fcad

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Database cleaner: Removes outdated collections, too. artifacts/trunk@1636 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Thu, 31 Mar 2011 17:14:22 +0000
parents 41404961c804
children 3d14fe6e05f7
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.ArtifactNamespaceContext;
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25 import de.intevation.artifacts.CallContext;
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26
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27 import de.intevation.artifacts.common.utils.XMLUtils;
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28
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29 import de.intevation.artifactdatabase.data.StateData;
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31
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32 /**
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33 * An abstract implementation of a {@link State}. It implements some basic
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34 * methods that return the id, description and data. The methods
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35 * <code>describe()</code> and <code>setup()</code> depend on the concrete class
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36 * and need to be implemented by those.
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37 */
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38 public abstract class AbstractState implements State {
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39
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40 /** The XPath to the ID of the state relative to the state node in the
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41 * configuration. */
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42 public static final String XPATH_ID = "@id";
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43
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44 /** The XPath to the description of the state relative to the state node in
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45 * the configuration. */
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46 public static final String XPATH_DESCRIPTION = "@description";
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47
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48 /** The XPath to the output nodes of the state configuration.*/
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49 public static final String XPATH_OUTPUT_MODES = "outputmodes/outputmode";
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51 /** The XPath to the list of facets relative to the output mode it belongs
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52 * to.*/
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53 public static final String XPATH_FACETS = "facets/facet";
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54
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55
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56 /** The logger that is used in this class.*/
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57 private static Logger logger = Logger.getLogger(AbstractState.class);
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60 /** The ID of the state. */
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61 protected String id;
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62
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63 /** The description of the state. */
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64 protected String description;
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65
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66 /** The data provided by this state. */
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67 protected Map<String, StateData> data;
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68
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69 /** A list of output modes which are available for this state.*/
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70 protected List<Output> outputs;
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73 public AbstractState() {
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74 outputs = new ArrayList<Output>();
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75 }
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78 /**
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79 * The default constructor.
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80 *
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81 * @param id The ID of the state.
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82 * @param description The description of the state.
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83 */
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84 public AbstractState(String id, String description) {
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85 super();
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87 this.id = id;
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88 this.description = description;
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90 }
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93 /**
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94 * Returns the ID of the state.
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95 *
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96 * @return the ID of the state.
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97 */
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98 public String getID() {
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99 return id;
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100 }
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101
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102
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103 /**
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104 * Set the ID of the state.
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105 *
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106 * @param id The ID of the state.
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107 */
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108 public void setID(String id) {
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109 this.id = id;
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110 }
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112
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113 /**
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114 * Returns the description of the state.
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115 *
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116 * @return the description of the state.
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117 */
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118 public String getDescription() {
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119 return description;
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120 }
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121
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122
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123 /**
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124 * Set the description of the state.
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125 *
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126 * @param description The description of the state.
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127 */
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128 public void setDescription(String description) {
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129 this.description = description;
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130 }
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131
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132
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133 /**
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134 * Returns the data of the state.
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135 *
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136 * @return the data of the state.
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137 */
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138 public Map<String, StateData> getData() {
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139 return data;
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140 }
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141
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142
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143 /**
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144 * Add new data to the state. NOTE: If there is already an object existing
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145 * with the key <i>name</i>, this object is overwritten by the new value.
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146 *
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147 * @param name The name of the data object.
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148 * @param StateData The data object.
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149 */
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150 public void addData(String name, StateData data) {
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151 if (this.data == null) {
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152 this.data = new HashMap<String, StateData>();
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153 }
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154
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155 this.data.put(name, data);
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156 }
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157
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158
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159 /**
209
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160 * Returns the list of possible outputs of this state. The list is empty
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161 * if no output is available for this state.
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162 *
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163 * @return a list of possible outputs of this state.
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164 */
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165 public List<Output> getOutputs() {
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166 return outputs;
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167 }
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168
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169
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170 /**
106
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171 * Initialize the state based on the state node in the configuration.
105
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172 *
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173 * @param config The state configuration node.
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174 */
106
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175 public void setup(Node config) {
226
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176 logger.info("AbstractState.setup");
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177
106
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178 id = (String) XMLUtils.xpath(config, XPATH_ID, XPathConstants.STRING);
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179
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180 description = (String) XMLUtils.xpath(
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181 config, XPATH_DESCRIPTION, XPathConstants.STRING);
209
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182
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183 setupOutputs(config);
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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 * This method tries reading the available output nodes configured in the
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189 * state configuration and adds possible Outputs to the outputs list.
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190 *
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191 * @param config The state configuration node.
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192 */
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193 protected void setupOutputs(Node config) {
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194 NodeList outs = (NodeList) XMLUtils.xpath(
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195 config,
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196 XPATH_OUTPUT_MODES,
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197 XPathConstants.NODESET,
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198 ArtifactNamespaceContext.INSTANCE);
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199
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200 if (outs == null || outs.getLength() == 0) {
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201 return;
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202 }
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203
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204 int size = outs.getLength();
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205
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206 for (int i = 0; i < size; i++) {
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207 outputs.add(buildOutput(outs.item(i)));
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208 }
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209 }
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210
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211
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212 /**
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213 * A helper method that creates an Output object based on the <i>out</i>
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214 * node.
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215 *
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216 * @param out The output node configuration.
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217 *
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218 * @return an Output object.
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219 */
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220 protected Output buildOutput(Node out) {
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221 String name = XMLUtils.xpathString(
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222 out, "@name", ArtifactNamespaceContext.INSTANCE);
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223
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224 String desc = XMLUtils.xpathString(
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225 out, "@description", ArtifactNamespaceContext.INSTANCE);
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226
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227 String mimetype = XMLUtils.xpathString(
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228 out, "@mime-type", ArtifactNamespaceContext.INSTANCE);
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229
226
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230 if (name == null) {
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231 return null;
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232 }
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233
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234 NodeList facets = (NodeList) XMLUtils.xpath(
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235 out,
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236 XPATH_FACETS,
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237 XPathConstants.NODESET,
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238 ArtifactNamespaceContext.INSTANCE);
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239
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240 if (facets == null || facets.getLength() == 0) {
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241 return new DefaultOutput(name, desc, mimetype);
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242 }
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243
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244 int num = facets.getLength();
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245
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246 List<Facet> facetList = new ArrayList<Facet>(num);
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247
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248 for (int i = 0; i < num; i++) {
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249 Facet facet = buildFacet(facets.item(i));
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250
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251 if (facet != null) {
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252 facetList.add(facet);
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253 }
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254 }
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255
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256 return new DefaultOutput(name, desc, mimetype, facetList);
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257 }
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258
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259
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260 /**
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261 * A helper method that creates a Facet object based on the <i>facet</i>
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262 * node.
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263 *
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264 * @param facet The facet node.
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265 *
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266 * @return a Facet object or null if no valid Facet was found.
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267 */
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268 protected Facet buildFacet(Node facet) {
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269 String name = XMLUtils.xpathString(
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270 facet, "@name", ArtifactNamespaceContext.INSTANCE);
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271
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272 String desc = XMLUtils.xpathString(
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273 facet, "@description", ArtifactNamespaceContext.INSTANCE);
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274
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275 return name != null ? new DefaultFacet(name, desc) : null;
106
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276 }
105
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277
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278
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279 /**
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280 * Describes the UI of the state. This method needs to be implemented by
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281 * concrete subclasses.
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282 *
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283 * @param document Describe doucment.
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284 * @param rootNode Parent node for all new elements.
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285 * @param context The CallContext.
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286 * @param uuid The uuid of an artifact.
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287 */
205
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288 public abstract Element describe(
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289 Document document,
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290 Node rootNode,
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291 CallContext context,
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292 String uuid
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293 );
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294 }
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295 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org