Mercurial > dive4elements > framework

annotate artifact-database/src/main/java/de/intevation/artifactdatabase/Config.java @ 34:9935e1c928de

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Bug Fixed: Comparation for outdated Artifacts was Wrong. artifacts/trunk@86 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Tim Englich <tim.englich@intevation.de>
date Tue, 15 Sep 2009 09:43:57 +0000
parents ccc6aae25585
children c2fc85e55f9f
rev   line source
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8f2de197bce2 Added config to artifact database and modelled bootstap of artifact factories on top of this.
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1 package de.intevation.artifactdatabase;
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2
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3 import java.io.File;
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4 import java.io.IOException;
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6 import org.w3c.dom.Document;
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7 import org.w3c.dom.NodeList;
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8 import org.w3c.dom.Node;
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10 import org.xml.sax.SAXException;
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11
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12 import javax.xml.parsers.DocumentBuilderFactory;
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13 import javax.xml.parsers.ParserConfigurationException;
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14
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15 import javax.xml.namespace.QName;
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16
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17 import javax.xml.xpath.XPathConstants;
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19 import org.apache.log4j.Logger;
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21 /**
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22 * @author Sascha L. Teichmann
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23 */
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24 public final class Config
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25 {
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26 private static Logger logger = Logger.getLogger(Config.class);
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28 public static final String CONFIG_DIR = "artifact.database.dir";
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30 public static final File CONFIG_DIR_DEFAULT =
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31 new File(new File(System.getProperty("user.home",
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32 System.getProperty("user.dir", "."))), ".artifactdb");
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33
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34 public static final String CONFIG_FILE = "conf.xml";
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36 private static Document config;
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37
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38 private Config() {
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39 }
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41 public static synchronized final Document getConfig() {
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42 if (config == null) {
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43 config = loadConfig();
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44 }
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45 return config;
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46 }
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47
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48 public static File getConfigDirectory() {
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49 String configDirString = System.getProperty(CONFIG_DIR);
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50
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51 File configDir = configDirString != null
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52 ? new File(configDirString)
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53 : CONFIG_DIR_DEFAULT;
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54
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55 if (!configDir.isDirectory()) {
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56 logger.warn("'" + configDir + "' is not a directory.");
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57 configDir = CONFIG_DIR_DEFAULT;
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58 }
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59
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60 return configDir;
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61 }
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62
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63 private static Document loadConfig() {
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64
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65 File configDir = getConfigDirectory();
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66
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67 File file = new File(configDir, CONFIG_FILE);
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69 if (!file.canRead() && !file.isFile()) {
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70 logger.error("Cannot read config file '"
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71 + file + "'.");
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72 return null;
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73 }
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74
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75 try {
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76 DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
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77 factory.setValidating(false); // XXX: This may change in future.
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78 return factory.newDocumentBuilder().parse(file);
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79 }
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80 catch (SAXException se) {
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81 logger.error(se.getLocalizedMessage(), se);
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82 }
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83 catch (ParserConfigurationException pce) {
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84 logger.error(pce.getLocalizedMessage(), pce);
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85 }
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86 catch (IOException ioe) {
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87 logger.error(ioe.getLocalizedMessage());
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88 }
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90 return null;
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91 }
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92
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93 public static final Object getXPath(
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94 Object root, String query, QName returnType
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95 ) {
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96 return XMLUtils.xpath(root, query, returnType);
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97 }
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98
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99 public static final Object getXPath(String query, QName returnType) {
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100 return XMLUtils.xpath(getConfig(), query, returnType);
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101 }
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102
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103 public static final NodeList getNodeSetXPath(String query) {
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104 return (NodeList)getXPath(query, XPathConstants.NODESET);
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105 }
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106
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107 public static final Node getNodeXPath(String query) {
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108 return (Node)getXPath(query, XPathConstants.NODE);
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109 }
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110
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111 public static final String getStringXPath(String xpath) {
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112 return getStringXPath(xpath, null);
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113 }
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114
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115 public static final String getStringXPath(String query, String def) {
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116 String s = (String)getXPath(query, XPathConstants.STRING);
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117 return s == null || s.length() == 0
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118 ? def
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119 : s;
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120 }
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121
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122 public static final NodeList getNodeSetXPath(Object root, String query) {
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123 return (NodeList)getXPath(root, query, XPathConstants.NODESET);
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124 }
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125
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126 public static final Node getNodeXPath(Object root, String query) {
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127 return (Node)getXPath(root, query, XPathConstants.NODE);
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128 }
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129
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130 public static final String getStringXPath(Object root, String xpath) {
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131 return getStringXPath(root, xpath, null);
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132 }
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133
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134 public static final String getStringXPath(
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135 Object root, String query, String def
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136 ) {
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137 String s = (String)getXPath(root, query, XPathConstants.STRING);
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138 return s == null || s.length() == 0
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139 ? def
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140 : s;
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141 }
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142 }
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143 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8:
http://dive4elements.wald.intevation.org