Mercurial > dive4elements > framework
view artifact-database/src/main/java/de/intevation/artifactdatabase/Config.java @ 45:9449f296cd54
Fixed inconsistencies in documentation after changes in h2-config
artifacts/trunk@162 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Hans Plum <hans.plum@intevation.de> |
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date | Wed, 30 Sep 2009 10:32:45 +0000 |
parents | ccc6aae25585 |
children | c2fc85e55f9f |
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package de.intevation.artifactdatabase; import java.io.File; import java.io.IOException; import org.w3c.dom.Document; import org.w3c.dom.NodeList; import org.w3c.dom.Node; import org.xml.sax.SAXException; import javax.xml.parsers.DocumentBuilderFactory; import javax.xml.parsers.ParserConfigurationException; import javax.xml.namespace.QName; import javax.xml.xpath.XPathConstants; import org.apache.log4j.Logger; /** * @author Sascha L. Teichmann */ public final class Config { private static Logger logger = Logger.getLogger(Config.class); public static final String CONFIG_DIR = "artifact.database.dir"; public static final File CONFIG_DIR_DEFAULT = new File(new File(System.getProperty("user.home", System.getProperty("user.dir", "."))), ".artifactdb"); public static final String CONFIG_FILE = "conf.xml"; private static Document config; private Config() { } public static synchronized final Document getConfig() { if (config == null) { config = loadConfig(); } return config; } public static File getConfigDirectory() { String configDirString = System.getProperty(CONFIG_DIR); File configDir = configDirString != null ? new File(configDirString) : CONFIG_DIR_DEFAULT; if (!configDir.isDirectory()) { logger.warn("'" + configDir + "' is not a directory."); configDir = CONFIG_DIR_DEFAULT; } return configDir; } private static Document loadConfig() { File configDir = getConfigDirectory(); File file = new File(configDir, CONFIG_FILE); if (!file.canRead() && !file.isFile()) { logger.error("Cannot read config file '" + file + "'."); return null; } try { DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); factory.setValidating(false); // XXX: This may change in future. return factory.newDocumentBuilder().parse(file); } catch (SAXException se) { logger.error(se.getLocalizedMessage(), se); } catch (ParserConfigurationException pce) { logger.error(pce.getLocalizedMessage(), pce); } catch (IOException ioe) { logger.error(ioe.getLocalizedMessage()); } return null; } public static final Object getXPath( Object root, String query, QName returnType ) { return XMLUtils.xpath(root, query, returnType); } public static final Object getXPath(String query, QName returnType) { return XMLUtils.xpath(getConfig(), query, returnType); } public static final NodeList getNodeSetXPath(String query) { return (NodeList)getXPath(query, XPathConstants.NODESET); } public static final Node getNodeXPath(String query) { return (Node)getXPath(query, XPathConstants.NODE); } public static final String getStringXPath(String xpath) { return getStringXPath(xpath, null); } public static final String getStringXPath(String query, String def) { String s = (String)getXPath(query, XPathConstants.STRING); return s == null || s.length() == 0 ? def : s; } public static final NodeList getNodeSetXPath(Object root, String query) { return (NodeList)getXPath(root, query, XPathConstants.NODESET); } public static final Node getNodeXPath(Object root, String query) { return (Node)getXPath(root, query, XPathConstants.NODE); } public static final String getStringXPath(Object root, String xpath) { return getStringXPath(root, xpath, null); } public static final String getStringXPath( Object root, String query, String def ) { String s = (String)getXPath(root, query, XPathConstants.STRING); return s == null || s.length() == 0 ? def : s; } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8: