Mercurial > dive4elements > framework

annotate artifact-database/src/main/java/org/dive4elements/artifactdatabase/DefaultArtifactFactory.java @ 513:69f99bdf3d65

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Use a list of "static" facets loaded from configuration to generate facets on artifact setup.
author Raimund Renkert <rrenkert@intevation.de>
date Wed, 30 Apr 2014 15:05:54 +0200
parents 415df0fc4fa1
children 863f1fa66981
rev   line source
100
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1 /*
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2 * Copyright (c) 2010 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
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9 package org.dive4elements.artifactdatabase;
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10
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11 import java.util.ArrayList;
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12 import java.util.HashMap;
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13 import java.util.List;
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14 import java.util.Map;
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15
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16 import javax.xml.xpath.XPathConstants;
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17
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18 import org.dive4elements.artifacts.common.utils.Config;
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19 import org.dive4elements.artifacts.common.utils.XMLUtils;
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20
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21 import org.dive4elements.artifacts.Artifact;
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22 import org.dive4elements.artifacts.ArtifactFactory;
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23 import org.dive4elements.artifacts.ArtifactSerializer;
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24 import org.dive4elements.artifacts.CallMeta;
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25 import org.dive4elements.artifacts.GlobalContext;
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26
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27 import org.apache.log4j.Logger;
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28
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29 import org.w3c.dom.Document;
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30 import org.w3c.dom.Node;
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31 import org.w3c.dom.NodeList;
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32
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33 /**
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34 * Trivial implementation of the ArtifactFactory interface.
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35 * Time to live (ttl), name and description are configured
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36 * via the Node given to #setup(Document, Node) with attributes
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37 * of same name. The class name of the artifacts to be build by this
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38 * factory is configures with the attribute 'artifact'.
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39 *
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40 * @author <a href="mailto:sascha.teichmann@intevation.de">Sascha L. Teichmann</a>
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41 */
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42 public class DefaultArtifactFactory
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43 implements ArtifactFactory
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44 {
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45 private static Logger logger =
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46 Logger.getLogger(DefaultArtifactFactory.class);
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47
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48 /**
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49 * XPath to access the TTL of this artifact.
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50 */
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51 public static final String XPATH_TTL = "@ttl";
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52 /**
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53 * XPath to access the name of this factory.
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54 */
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55 public static final String XPATH_NAME = "@name";
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56 /**
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57 * XPath to access the description of this artifact factory.
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58 */
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59 public static final String XPATH_DESCRIPTION = "@description";
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60 /**
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61 * XPath to access the class name of the artifacts to be build
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62 * by this factory.
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63 */
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64 public static final String XPATH_ARTIFACT = "@artifact";
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65 /**
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66 * XPath to access the static facets configured for artifacts
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67 */
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68 public static final String XPATH_ARTIFACT_CONFIG =
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69 "/artifact-database/artifacts/artifact[@name=$name]/load-facets/facet";
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70
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71 /**
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72 * XPath to access the static facets configured for artifacts
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73 */
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74 public static final String XPATH_ARTIFACT_NAME =
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75 "/artifact-database/artifacts/artifact/@name";
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77 /**
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78 * Default description of this factory if none is given by the
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79 * configuration.
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80 */
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81 public static final String DEFAULT_DESCRIPTION =
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82 "No description available";
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84 /**
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85 * Class to load if no artifact class is given in the configuration.
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86 */
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87 public static final String DEFAULT_ARTIFACT =
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88 "org.dive4elements.artifactdatabase.DefaultArtifact";
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89
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90 /**
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91 * The Time to live of the artifacts build by this factory.
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92 */
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93 protected Long ttl;
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95 /**
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96 * The name of this factory.
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97 */
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98 protected String name;
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100 /**
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101 * The description of this factory.
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102 */
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103 protected String description;
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105 /**
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106 * The class of the artifacts to be build by this factory.
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107 */
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108 protected Class artifactClass;
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110 /**
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111 * The name of the artifacts to be build by this factory.
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112 */
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113 protected String artifactName;
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114
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115 /**
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116 * The list of facets the generated artifact creates on instantiation.
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117 */
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118 protected List<Class> facetClasses;
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119
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120 /**
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121 * Default constructor.
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122 */
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123 public DefaultArtifactFactory() {
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124 facetClasses = new ArrayList<Class>();
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125 }
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126
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127 public String getName() {
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128 return name;
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129 }
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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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134
90
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135 public Artifact createArtifact(
293
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136 String identifier,
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137 GlobalContext context,
297
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138 CallMeta callMeta,
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139 Document data
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140 ) {
10
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141 try {
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142 Artifact artifact =
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143 (Artifact)artifactClass.newInstance();
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144
513
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145 if (artifact.getName() == null ||
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146 artifact.getName().length() == 0) {
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147 artifact.setName(artifactName);
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148 }
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149 artifact.setup(
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150 identifier,
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151 this,
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152 context,
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153 callMeta,
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154 data,
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155 facetClasses);
10
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156
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157 return artifact;
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158 }
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159 catch (InstantiationException ie) {
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160 logger.error(ie.getLocalizedMessage(), ie);
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161 }
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162 catch (IllegalAccessException iae) {
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163 logger.error(iae.getLocalizedMessage(), iae);
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164 }
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165 catch (ClassCastException cce) {
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166 logger.error(cce.getLocalizedMessage(), cce);
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167 }
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168
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169 return null;
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170 }
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171
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172 public void setup(Document document, Node factoryNode) {
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173 String ttlString = Config.getStringXPath(factoryNode, XPATH_TTL);
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174 if (ttlString != null) {
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175 try {
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176 ttl = Long.valueOf(ttlString);
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177 }
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178 catch (NumberFormatException nfe) {
17
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179 logger.warn("'" + ttlString + "' is not an integer.");
10
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180 }
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181 }
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182
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183 description = Config.getStringXPath(
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184 factoryNode, XPATH_DESCRIPTION, DEFAULT_DESCRIPTION);
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185
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186 name = Config.getStringXPath(
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187 factoryNode, XPATH_NAME, toString());
513
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188 logger.debug("setting up " + name);
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189
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190 String artifact = Config.getStringXPath(
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191 factoryNode, XPATH_ARTIFACT, DEFAULT_ARTIFACT);
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192
513
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193 artifactName = Config.getStringXPath(
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194 document, XPATH_ARTIFACT_NAME, "default");
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195 logger.debug(artifactName);
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196 Map<String, String> variables = new HashMap<String, String>();
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197 variables.put("name", name);
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198 NodeList facets = (NodeList) XMLUtils.xpath(
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199 document,
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200 XPATH_ARTIFACT_CONFIG,
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diff changeset
201 XPathConstants.NODESET,
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diff changeset
202 null,
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diff changeset
203 variables);
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204
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205 for (int i = 0; i < facets.getLength(); i++) {
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diff changeset
206 logger.debug(facets.item(i).getAttributes().getNamedItem("class").getNodeValue());
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diff changeset
207 String className =
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diff changeset
208 facets.item(i).getAttributes().getNamedItem("class").getNodeValue();
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diff changeset
209 try {
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diff changeset
210 facetClasses.add(Class.forName(className));
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211 }
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diff changeset
212 catch (ClassNotFoundException cnfe) {
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diff changeset
213 logger.error(cnfe.getLocalizedMessage(), cnfe);
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diff changeset
214 }
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diff changeset
215 }
10
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216 try {
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217 artifactClass = Class.forName(artifact);
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218 }
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parents:
diff changeset
219 catch (ClassNotFoundException cnfe) {
17
5a6b6a3debc7 Integrated logging into artifact database.
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diff changeset
220 logger.error(cnfe.getLocalizedMessage(), cnfe);
10
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221 }
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parents:
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222
e8626caac353 * Made Artifact life cycle symmetric: setup/endOfLife.
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diff changeset
223 if (artifactClass == null) {
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parents:
diff changeset
224 artifactClass = DefaultArtifact.class;
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225 }
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parents:
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226 }
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parents:
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227
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228 public Long timeToLiveUntouched(Artifact artifact, Object context) {
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229 return ttl;
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diff changeset
230 }
41
5e4bc24ea438 Made serilization more flexible. DB update required!!!
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diff changeset
231
5e4bc24ea438 Made serilization more flexible. DB update required!!!
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diff changeset
232 public ArtifactSerializer getSerializer() {
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diff changeset
233 return DefaultArtifactSerializer.INSTANCE;
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diff changeset
234 }
10
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235 }
91
730ff077a58c More javadoc, some code formatting.
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parents: 90
diff changeset
236 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org