Mercurial > dive4elements > framework

annotate artifact-database/src/main/java/de/intevation/artifactdatabase/DefaultArtifactFactory.java @ 93:e27cf9c84eb8

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Unified imports. artifacts/trunk@849 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Sun, 28 Mar 2010 15:57:40 +0000
parents 730ff077a58c
children 933bbc9fc11f
rev   line source
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1 package de.intevation.artifactdatabase;
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2
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3 import de.intevation.artifacts.Artifact;
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4 import de.intevation.artifacts.ArtifactFactory;
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5 import de.intevation.artifacts.ArtifactSerializer;
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6
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7 import org.apache.log4j.Logger;
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8
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9 import org.w3c.dom.Document;
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10 import org.w3c.dom.Node;
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12 /**
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13 * Trivial implementation of the ArtifactFactory interface.
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14 * Time to live (ttl), name and description are configured
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15 * via the Node given to #setup(Document, Node) with attributes
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16 * of same name. The class name of the artifacts to be build by this
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17 * factory is configures with the attribute 'artifact'.
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18 *
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19 * @author <a href="mailto:sascha.teichmann@intevation.de">Sascha L. Teichmann</a>
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20 */
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21 public class DefaultArtifactFactory
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22 implements ArtifactFactory
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23 {
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24 private static Logger logger =
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25 Logger.getLogger(DefaultArtifactFactory.class);
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26
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27 /**
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28 * XPath to access the TTL of this artifact.
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29 */
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30 public static final String XPATH_TTL = "@ttl";
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31 /**
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32 * XPath to access the name of this factory.
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33 */
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34 public static final String XPATH_NAME = "@name";
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35 /**
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36 * XPath to access the description of this artifact factory.
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37 */
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38 public static final String XPATH_DESCRIPTION = "@description";
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39 /**
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40 * XPath to access the class name of the artifacts to be build
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41 * by this factory.
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42 */
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43 public static final String XPATH_ARTIFACT = "@artifact";
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45 /**
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46 * Default description of this factory if none is given by the
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47 * configuration.
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48 */
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49 public static final String DEFAULT_DESCRIPTION =
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50 "No description available";
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51
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52 /**
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53 * Class to load if no artifact class is given in the configuration.
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54 */
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55 public static final String DEFAULT_ARTIFACT =
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56 "de.intevation.artifactdatabase.DefaultArtifact";
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57
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58 /**
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59 * The Time to live of the artifacts build by this factory.
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60 */
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61 protected Long ttl;
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62
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63 /**
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64 * The name of this factory.
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65 */
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66 protected String name;
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67
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68 /**
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69 * The description of this factory.
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70 */
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71 protected String description;
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72
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73 /**
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74 * The class of the artifacts to be build by this factory.
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75 */
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76 protected Class artifactClass;
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78 /**
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79 * Default constructor.
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80 */
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81 public DefaultArtifactFactory() {
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82 }
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83
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84 public String getName() {
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85 return name;
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86 }
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87
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88 public String getDescription() {
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89 return description;
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90 }
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91
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92 public Artifact createArtifact(
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93 String identifier,
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94 Object context,
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95 Document data
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96 ) {
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97 try {
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98 Artifact artifact =
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99 (Artifact)artifactClass.newInstance();
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100
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101 artifact.setup(identifier, this, context, data);
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102
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103 return artifact;
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104 }
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105 catch (InstantiationException ie) {
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106 logger.error(ie.getLocalizedMessage(), ie);
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107 }
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108 catch (IllegalAccessException iae) {
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109 logger.error(iae.getLocalizedMessage(), iae);
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110 }
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111 catch (ClassCastException cce) {
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112 logger.error(cce.getLocalizedMessage(), cce);
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113 }
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114
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115 return null;
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116 }
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117
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118 public void setup(Document document, Node factoryNode) {
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119
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120 String ttlString = Config.getStringXPath(factoryNode, XPATH_TTL);
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121 if (ttlString != null) {
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122 try {
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123 ttl = Long.valueOf(ttlString);
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124 }
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125 catch (NumberFormatException nfe) {
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126 logger.warn("'" + ttlString + "' is not an integer.");
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127 }
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128 }
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129
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130 description = Config.getStringXPath(
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131 factoryNode, XPATH_DESCRIPTION, DEFAULT_DESCRIPTION);
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132
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133 name = Config.getStringXPath(
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134 factoryNode, XPATH_NAME, toString());
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135
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136 String artifact = Config.getStringXPath(
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137 factoryNode, XPATH_ARTIFACT, DEFAULT_ARTIFACT);
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138
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139 try {
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140 artifactClass = Class.forName(artifact);
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141 }
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142 catch (ClassNotFoundException cnfe) {
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143 logger.error(cnfe.getLocalizedMessage(), cnfe);
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144 }
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145
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146 if (artifactClass == null) {
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147 artifactClass = DefaultArtifact.class;
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148 }
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149 }
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150
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151 public Long timeToLiveUntouched(Artifact artifact, Object context) {
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152 return ttl;
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153 }
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5e4bc24ea438 Made serilization more flexible. DB update required!!!
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154
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155 public ArtifactSerializer getSerializer() {
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156 return DefaultArtifactSerializer.INSTANCE;
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157 }
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158 }
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730ff077a58c More javadoc, some code formatting.
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159 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org