Mercurial > dive4elements > framework

annotate artifact-database/src/main/java/de/intevation/artifactdatabase/ProtocolUtils.java @ 114:19b86e27d0c3

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New XPath constants and methods that retrieve important nodes of the DESCRIBE document. artifacts/trunk@1328 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Fri, 18 Feb 2011 14:21:32 +0000
parents ab646e0f5569
children 435631e07da2
rev   line source
107
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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;
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9
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10 import java.util.List;
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11
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12 import org.w3c.dom.Element;
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13
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14 import de.intevation.artifacts.common.utils.XMLUtils;
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15
109
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16 import de.intevation.artifactdatabase.state.State;
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17
107
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18
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19 /**
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20 * This class provides methods that help creating the artifact protocol
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21 * documents describe, feed, advance and out.
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22 *
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23 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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24 */
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25 public class ProtocolUtils {
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26
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27 /**
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28 * It should not be necessary to create instances of this class.
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29 */
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30 private ProtocolUtils() {}
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31
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32
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33 /**
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34 * This method creates a node that might be used for the artifact protocol.
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35 *
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36 * @param creator The ElementCreator that is used to create the node.
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37 * @param nodeName The node name.
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38 * @param attrName The names of optional attributes.
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39 * @param value The values for the optional attributes.
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40 *
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41 * @return the created node.
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42 */
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43 public static Element createArtNode(
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44 XMLUtils.ElementCreator creator,
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45 String nodeName, String[] attrName, String[] value)
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46 {
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47 Element typeNode = creator.create(nodeName);
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48
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49 if (attrName != null && value != null) {
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50 for (int i = 0; i < attrName.length; i++) {
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51 if (i < value.length) {
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52 creator.addAttr(typeNode, attrName[i], value[i], true);
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53 }
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54 else {
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55 break;
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56 }
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57 }
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58 }
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59
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60 return typeNode;
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61 }
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62
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63
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64 /**
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65 * This method creates the root node for all artifact protocol documents.
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66 *
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67 * @param creator The ElementCreator used to create new elements.
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68 *
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69 * @return the root node for the artifact protocol document.
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70 */
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71 public static Element createRootNode(XMLUtils.ElementCreator creator) {
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72 return createArtNode(creator, "result", null, null);
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73 }
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74
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75
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76 /**
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77 * This method appends the three necessary nodes <i>type</i>, <i>uuid</i>
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78 * and <i>hash</i> of the describe document to <i>root</i> node.
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79 *
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80 * @param creator The ElementCreator that is used to create new nodes.
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81 * @param root The root node of the describe document.
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82 * @param uuid The UUID of the artifact.
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83 * @param hash The hash if the artifact.
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84 */
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85 public static void appendDescribeHeader(
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86 XMLUtils.ElementCreator creator, Element root, String uuid, String hash)
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87 {
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88 root.appendChild(createArtNode(
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89 creator,
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90 "type",
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91 new String[] {"name"},
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92 new String[] {"describe"}));
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93
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94 root.appendChild(createArtNode(
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95 creator,
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96 "uuid",
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97 new String[] {"value"},
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98 new String[] {uuid}));
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99
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100 root.appendChild(createArtNode(
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101 creator,
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102 "hash",
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103 new String[] {"value"},
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104 new String[] {hash}));
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105 }
109
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106
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107
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108 /**
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109 * This method appends a node that describes the current state to
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110 * <i>root</i>.
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111 *
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112 * @param creator The ElementCreator used to create new elements.
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113 * @param root The parent node for new elements.
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114 * @param state The state to be appended.
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115 */
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116 public static void appendState(
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117 XMLUtils.ElementCreator creator, Element root, State state)
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118 {
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119 root.appendChild(createArtNode(
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120 creator, "state",
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121 new String[] { "description", "name" },
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122 new String[] { state.getDescription(), state.getID() }));
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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 * This method appends a node with reachable states to <i>root</i>.
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128 *
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129 * @param creator The ElementCreator used to create new elements.
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130 * @param root The parent node for new elements.
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131 * @param states The reachable states to be appended.
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132 */
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133 public static void appendReachableStates(
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134 XMLUtils.ElementCreator creator,
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135 Element root,
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136 List<State> states)
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137 {
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138 Element reachable = createArtNode(
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139 creator, "reachable-states", null, null);
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140
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141 for (State s: states) {
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142 appendState(creator, reachable, s);
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143 }
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144
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145 root.appendChild(reachable);
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146 }
107
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147 }
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148 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8:
http://dive4elements.wald.intevation.org