java/jdbc-dk-driver/src/info/globalcode/sql/dk/jdbc/Driver.java
branchv_0
changeset 239 39e6c2ad3571
parent 238 4a1864c3e867
child 240 09c72e23c895
--- a/java/jdbc-dk-driver/src/info/globalcode/sql/dk/jdbc/Driver.java	Mon Mar 04 20:15:24 2019 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,157 +0,0 @@
-/**
- * SQL-DK
- * Copyright © 2015 František Kučera (frantovo.cz)
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-package info.globalcode.sql.dk.jdbc;
-
-import info.globalcode.sql.dk.Constants;
-import info.globalcode.sql.dk.configuration.Configuration;
-import info.globalcode.sql.dk.configuration.ConfigurationException;
-import info.globalcode.sql.dk.configuration.DatabaseDefinition;
-import info.globalcode.sql.dk.configuration.Loader;
-import info.globalcode.sql.dk.configuration.Properties;
-import info.globalcode.sql.dk.configuration.Property;
-import java.sql.Connection;
-import java.sql.DriverManager;
-import java.sql.DriverPropertyInfo;
-import java.sql.SQLException;
-import java.sql.SQLFeatureNotSupportedException;
-import java.util.logging.Level;
-import java.util.logging.Logger;
-
-/**
- * <p>
- * Meta JDBC driver that works as redirector/router. It loads SQL-DK's configuration file and
- * instantiates a real JDBC connection (PostgreSQL, MariDB etc.) of given name.
- * </p>
- *
- * <p>
- * Raison d'être: user can define his/her database connections just once (in SQL-DK's configuration)
- * and use them in many other programs – there is no need to define the connection (hostname,
- * username, password, properties…) in each application again and again. User will simply connect to
- * e.g. <code>jdbc:sql-dk://my-connection</code> and this driver reads parameters of
- * <code>my-connection</code> from SQL-DK's configuration and returns real driver implementation.
- * </p>
- *
- * <p>
- * Of course, the real JDBC driver for given database is still needed on the class path.
- * </p>
- *
- * <p>
- * TODO: current version is quite heavy-weight, because it includes whole SQL-DK source tree. Some
- * refactoring and separation is desired to provide more light-weight JDBC driver. However the
- * public interface and behavior of this driver should remain unchanged.
- * </p>
- *
- * @author Ing. František Kučera (frantovo.cz)
- */
-public class Driver implements java.sql.Driver {
-
-	private static final Logger log = Logger.getLogger(Driver.class.getName());
-
-	private final Loader loader = new Loader();
-
-	static {
-		try {
-			DriverManager.registerDriver(new Driver());
-		} catch (SQLException e) {
-			log.log(Level.SEVERE, "Unable to register JDBC driver", e);
-		}
-	}
-
-	@Override
-	public Connection connect(String url, java.util.Properties info) throws SQLException {
-		if (acceptsURL(url)) {
-			log.log(Level.FINER, "Loading SQL-DK configuration for URL: {0}", url);
-			String name = extractDatabaseName(url);
-			log.log(Level.FINE, "Loading SQL-DK configuration for name: {0}", name);
-
-			try {
-				return getConnection(name, info);
-			} catch (ConfigurationException e) {
-				log.log(Level.SEVERE, "Unable to load SQL-DK configuration for name: {0}. Is it defined in {1}?", new Object[]{name, Constants.CONFIG_FILE});
-				throw new SQLException("Unable to load SQL-DK configuration for name: " + name, e);
-			}
-		} else {
-			// The driver should return "null" if it realizes it is the wrong kind of driver to connect to the given URL.
-			return null;
-		}
-	}
-
-	private Connection getConnection(String connectionName, java.util.Properties info) throws SQLException, ConfigurationException {
-		Configuration c = loader.loadConfiguration();
-		DatabaseDefinition dd = c.getDatabase(connectionName);
-
-		if (acceptsURL(dd.getUrl())) {
-			log.log(Level.SEVERE, "SQL-DK meta JDBC driver loops to itself: {0} → {1} Please check {2}", new Object[]{connectionName, dd.getUrl(), Constants.CONFIG_FILE});
-			throw new ConfigurationException("SQL-DK meta JDBC driver loops to itself.");
-		} else {
-			return Loader.jdbcConnect(dd, translate(info));
-		}
-	}
-
-	private String extractDatabaseName(String url) {
-		return url.split("//", 2)[1];
-	}
-
-	/**
-	 * TODO: refactor/move, reuse
-	 *
-	 * @param info
-	 * @return
-	 */
-	private Properties translate(java.util.Properties info) {
-		Properties properties = new Properties();
-
-		for (String name : info.stringPropertyNames()) {
-			String value = info.getProperty(name);
-			properties.add(new Property(name, value));
-		}
-
-		return properties;
-	}
-
-	@Override
-	public boolean acceptsURL(String url) throws SQLException {
-		return url != null && url.startsWith("jdbc:sql-dk://");
-	}
-
-	@Override
-	public DriverPropertyInfo[] getPropertyInfo(String url, java.util.Properties info) throws SQLException {
-		return new DriverPropertyInfo[0];
-	}
-
-	@Override
-	public int getMajorVersion() {
-		return 0;
-	}
-
-	@Override
-	public int getMinorVersion() {
-		return 1;
-	}
-
-	@Override
-	public boolean jdbcCompliant() {
-		return false;
-	}
-
-	@Override
-	public Logger getParentLogger() throws SQLFeatureNotSupportedException {
-		throw new SQLFeatureNotSupportedException("Not supported yet.");
-	}
-
-}