sascha@4072: package de.intevation.db;
sascha@4072: 
sascha@4072: import de.intevation.utils.XML;
sascha@4072: 
sascha@4072: import java.util.HashMap;
sascha@4072: 
sascha@4072: import org.w3c.dom.Document;
sascha@4072: 
sascha@4072: import javax.xml.xpath.XPathConstants;
sascha@4072: 
sascha@4072: import java.sql.Connection;
sascha@4072: import java.sql.SQLException;
sascha@4072: import java.sql.DriverManager;
sascha@4072: 
sascha@4072: import org.apache.log4j.Logger;
sascha@4072: 
sascha@4072: public class ConnectionBuilder
sascha@4072: {
sascha@4072:     private static Logger log = Logger.getLogger(ConnectionBuilder.class);
sascha@4072: 
sascha@4072:     public static final String XPATH_DRIVER   = "/sync/side[@name=$type]/db/driver/text()";
sascha@4072:     public static final String XPATH_USER     = "/sync/side[@name=$type]/db/user/text()";
sascha@4072:     public static final String XPATH_PASSWORD = "/sync/side[@name=$type]/db/password/text()";
sascha@4072:     public static final String XPATH_URL      = "/sync/side[@name=$type]/db/url/text()";
sascha@4072: 
sascha@4072:     protected String type;
sascha@4072:     protected String driver;
sascha@4072:     protected String user;
sascha@4072:     protected String password;
sascha@4072:     protected String url;
sascha@4072: 
sascha@4072:     public ConnectionBuilder(String type, Document document) {
sascha@4072:         this.type = type;
sascha@4072:         extractCredentials(document);
sascha@4072:     }
sascha@4072: 
sascha@4072:     protected void extractCredentials(Document document) {
sascha@4072:         HashMap<String, String> map = new HashMap<String, String>();
sascha@4072:         map.put("type", type);
sascha@4072: 
sascha@4072:         driver = (String)XML.xpath(
sascha@4072:             document, XPATH_DRIVER, XPathConstants.STRING, null, map);
sascha@4072:         user = (String)XML.xpath(
sascha@4072:             document, XPATH_USER, XPathConstants.STRING, null, map);
sascha@4072:         password = (String)XML.xpath(
sascha@4072:             document, XPATH_PASSWORD, XPathConstants.STRING, null, map);
sascha@4072:         url = (String)XML.xpath(
sascha@4072:             document, XPATH_URL, XPathConstants.STRING, null, map);
sascha@4072: 
sascha@4072:         if (log.isDebugEnabled()) {
sascha@4072:             log.debug("driver: " + driver);
sascha@4072:             log.debug("user: " + user);
sascha@4072:             log.debug("password: *******");
sascha@4072:             log.debug("url: " + url);
sascha@4072:         }
sascha@4072:     }
sascha@4072: 
sascha@4072:     public Connection getConnection() throws SQLException {
sascha@4072: 
sascha@4072:         if (driver != null && driver.length() > 0) {
sascha@4072:             try {
sascha@4072:                 Class.forName(driver);
sascha@4072:             }
sascha@4072:             catch (ClassNotFoundException cnfe) {
sascha@4072:                 throw new SQLException(cnfe);
sascha@4072:             }
sascha@4072:         }
sascha@4072: 
sascha@4072:         return DriverManager.getConnection(url, user, password);
sascha@4072:     }
sascha@4072: }
sascha@4072: // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :