Mercurial > dive4elements > framework

annotate artifacts-common/src/main/java/de/intevation/artifacts/common/utils/ClientProtocolUtils.java @ 172:8ce06db80857

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Added a new method to the ProtocolUtils that creates the necessary CREATE document for creating new artifact collections. artifacts/trunk@1397 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Fri, 04 Mar 2011 11:47:27 +0000
parents 19b86e27d0c3
children b5e1949bc255
rev   line source
113
0344a20f8a93 Added the ArtifactNamespaceContext and a ClientProtocolUtils that helps working with the artifact protocol.
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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.artifacts.common.utils;
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9
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10 import javax.xml.xpath.XPathConstants;
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11
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12 import org.w3c.dom.Document;
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13 import org.w3c.dom.Element;
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14 import org.w3c.dom.Node;
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15 import org.w3c.dom.NodeList;
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16
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17 import de.intevation.artifacts.common.ArtifactNamespaceContext;
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18
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19
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20 /**
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21 * This class provides methods that help creating the artifact protocol
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22 * documents DESCRIBE, FEED, ADVANCE and OUT.
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23 *
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24 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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25 */
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26 public class ClientProtocolUtils {
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27
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28 /** The XPath to the current state in the DESCRIBE document.*/
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29 public static final String XPATH_CURRENT_STATE = "/art:result/art:state";
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30
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31 /** The XPath to the static UI part in the DESCRIBE document.*/
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32 public static final String XPATH_STATIC = "/art:result/art:ui/art:static";
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33
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34 /** The XPath to the dynamic UI part in the DESCRIBE document.*/
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35 public static final String XPATH_DYNAMIC = "/art:result/art:ui/art:dynamic";
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36
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37 /** The XPath to the reachable states part in the DESCRIBE document.*/
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38 public static final String XPATH_STATES =
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39 "/art:result/art:reachable-states";
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40
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41 /** The XPath to the select node relative to the dynamic UI node in the
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42 * DESCRIBE document.*/
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43 public static final String XPATH_DATA_SELECT = "art:select";
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44
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45 /** The XPath to the choices nodes relative to the select node in the
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46 * DESCRIBE document.*/
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47 public static final String XPATH_DATA_ITEMS = "art:choices/art:item";
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48
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49 /** The XPath to a label in the artifact's DESCRIBE document.*/
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50 public static final String XPATH_LABEL = "art:label/text()";
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51
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52 /** The XPath to a value in the artifact's DESCRIBE document.*/
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53 public static final String XPATH_VALUE = "art:value/text()";
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54
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55
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56 /**
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57 * It should not be necessary to create instances of this class.
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58 */
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59 private ClientProtocolUtils() {
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60 }
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61
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62
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63 /**
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64 * This method creates a new CREATE document.
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65 *
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66 * @return the CREATE document.
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67 */
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68 public static Document newCreateDocument(String factory) {
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69 Document doc = XMLUtils.newDocument();
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70
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71 XMLUtils.ElementCreator cr = new XMLUtils.ElementCreator(
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72 doc,
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73 ArtifactNamespaceContext.NAMESPACE_URI,
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74 ArtifactNamespaceContext.NAMESPACE_PREFIX);
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75
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76 Element action = cr.create("action");
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77 Element type = cr.create("type");
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78 Element fac = cr.create("factory");
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79
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80 type.setAttribute("name", "create");
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81 fac.setAttribute("name", factory);
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82
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83 action.appendChild(type);
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84 action.appendChild(fac);
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85
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86 doc.appendChild(action);
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87
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88 return doc;
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89 }
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91
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92 /**
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93 * This method creates a new document that is used to create new artifact
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94 * collections in the artifact server.
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95 *
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96 * @param name <b>Optional</b> name of the collection.
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97 *
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98 * @return the document to create new collections.
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99 */
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100 public static Document newCreateCollectionDocument(String name) {
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101 Document doc = XMLUtils.newDocument();
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102
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103 XMLUtils.ElementCreator cr = new XMLUtils.ElementCreator(
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104 doc,
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105 ArtifactNamespaceContext.NAMESPACE_URI,
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106 ArtifactNamespaceContext.NAMESPACE_PREFIX);
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107
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108 Element action = cr.create("action");
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109 Element type = cr.create("type");
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110 Element collection = cr.create("artifact-collection");
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111
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112 cr.addAttr(type, "name", "create");
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113 cr.addAttr(collection, "name", name != null ? name : "");
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114
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115 action.appendChild(type);
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116 action.appendChild(collection);
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117
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118 doc.appendChild(action);
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119
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120 return doc;
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121 }
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122
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123
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124 /**
114
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125 * Returns string value found by {@link XPATH_LABEL} relative to
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126 * <i>node</i>.
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127 *
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128 * @param node A node.
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129 *
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130 * @return the string value found by {@link XPATH_LABEL}.
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131 */
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132 public static String getLabel(Node node) {
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133 return (String) XMLUtils.xpath(
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134 node,
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135 XPATH_LABEL,
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136 XPathConstants.STRING,
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137 ArtifactNamespaceContext.INSTANCE);
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138 }
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139
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140
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141 /**
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142 * Returns string value found by {@link XPATH_VALUE} relative to
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143 * <i>node</i>.
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144 *
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145 * @param node A node.
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146 *
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147 * @return the string value found by {@link XPATH_VALUE}.
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148 */
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149 public static String getValue(Node node) {
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150 return (String) XMLUtils.xpath(
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151 node,
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152 XPATH_VALUE,
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153 XPathConstants.STRING,
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154 ArtifactNamespaceContext.INSTANCE);
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155 }
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156
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157
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158 /**
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159 * This method returns the static UI part of the artifact's DESCRIBE
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160 * document.
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161 *
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162 * @param description The document returned by the artifact server's
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163 * DESCRIBE operation.
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164 *
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165 * @return the static UI node.
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166 */
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167 public static Node getStaticUI(Document description) {
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168 return (Node) XMLUtils.xpath(
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169 description,
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170 XPATH_STATIC,
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171 XPathConstants.NODE,
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172 ArtifactNamespaceContext.INSTANCE);
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173 }
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174
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175
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176 /**
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177 * This method returns the dynamic UI part of the artifact's DESCRIBE
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178 * document.
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179 *
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180 * @param description The document returned by the artifact server's
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181 * DESCRIBE operation.
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182 *
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183 * @return the dynamic UI node.
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184 */
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185 public static Node getDynamicUI(Document description) {
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186 return (Node) XMLUtils.xpath(
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187 description,
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188 XPATH_DYNAMIC,
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189 XPathConstants.NODE,
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190 ArtifactNamespaceContext.INSTANCE);
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191 }
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192
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193
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194 /**
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195 * This method returns the current state node contained in the DESCRIBE
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196 * document.
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197 *
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198 * @param description The document returned by the artifact server's
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199 * DESCRIBE operation.
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200 *
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201 * @return the node containing information about the current state.
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202 */
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203 public static Node getCurrentState(Document description) {
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204 return (Node) XMLUtils.xpath(
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205 description,
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206 XPATH_CURRENT_STATE,
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207 XPathConstants.NODE,
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208 ArtifactNamespaceContext.INSTANCE);
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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 * This method returns the node that contains information about the
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214 * reachable states of the artifact in the artifact's DESCRIBE document.
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215 *
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216 * @param description The document returned by the artifact server's
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217 * DESCRIBE operation.
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218 *
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219 * @return the node that contains the reachable states.
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220 */
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221 public static Node getReachableStates(Document description) {
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222 return (Node) XMLUtils.xpath(
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223 description,
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224 XPATH_STATES,
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225 XPathConstants.NODE,
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226 ArtifactNamespaceContext.INSTANCE);
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227 }
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228
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229
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230 /**
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231 * Returns the node found by {@link XPATH_DATA_SELECT}.
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232 *
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233 * @param dynamicNode The dynamic UI node of the DESCRIBE document.
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234 *
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235 * @return the select node found in the dynamic UI node.
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236 */
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237 public static Node getSelectNode(Node dynamicNode) {
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238 return (Node) XMLUtils.xpath(
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239 dynamicNode,
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240 XPATH_DATA_SELECT,
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241 XPathConstants.NODE,
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242 ArtifactNamespaceContext.INSTANCE);
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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 * Returns the items that could be found in the <i>node</i>.
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248 *
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249 * @param node A select node.
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250 *
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251 * @return the choices nodes as node list.
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252 */
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253 public static NodeList getItemNodes(Node node) {
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254 return (NodeList) XMLUtils.xpath(
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255 node,
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256 XPATH_DATA_ITEMS,
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257 XPathConstants.NODESET,
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258 ArtifactNamespaceContext.INSTANCE);
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259 }
113
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260 }
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261 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org