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Diffstat (limited to 'src/connectors/src/data/io/sql/SQLConnectionWrapper.java')
-rw-r--r-- | src/connectors/src/data/io/sql/SQLConnectionWrapper.java | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/src/connectors/src/data/io/sql/SQLConnectionWrapper.java b/src/connectors/src/data/io/sql/SQLConnectionWrapper.java new file mode 100644 index 0000000..2bab2c8 --- /dev/null +++ b/src/connectors/src/data/io/sql/SQLConnectionWrapper.java @@ -0,0 +1,136 @@ +/* + * SSSync, a Simple and Stupid Synchronizer for data with multi-valued attributes + * Copyright (C) 2014 Ludovic Pouzenc <ludovic@pouzenc.fr> + * + * This file is part of SSSync. + * + * SSSync 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. + * + * SSSync 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 SSSync. If not, see <http://www.gnu.org/licenses/> + */ + +package data.io.sql; + +import java.io.Closeable; +import java.io.File; +import java.io.IOException; +import java.sql.Connection; +import java.sql.Driver; +import java.sql.DriverManager; +import java.sql.SQLException; + +import data.io.MVDataReader; + +/** + * TODO javadoc + * + * @author lpouzenc + */ +public class SQLConnectionWrapper implements Closeable { + + /** + * Enumeration of supported DBMS. Each use a particular JDBC driver. + */ + public enum DBMSType { oracle, mysql/*, derby*/ } + + private final Connection conn; + + /** + * TODO javadoc + * @param dbms + * @param host + * @param port + * @param ress + * @param user + * @param pass + * @param db + */ + public SQLConnectionWrapper(DBMSType dbms, String host, int port, String ress, String user, String pass, String db) { + + String driverClassName=null; + String url; + + switch ( dbms ) { + case oracle: + driverClassName="oracle.jdbc.driver.OracleDriver"; + url="jdbc:oracle:thin:@" + host + ":" + port + ":" + ress + "/" + db; + break; + case mysql: + driverClassName="com.mysql.jdbc.Driver"; + url="jdbc:mysql://" + host + ":" + port + "/" + db; + break; + /* Could be useful with JUnit tests + case derby: + driverClassName="org.apache.derby.jdbc.EmbeddedDriver"; + url="jdbc:derby:" + db; + break; + */ + default: + throw new IllegalArgumentException("Unsupported DBMSType : " + dbms); + } + + try { + @SuppressWarnings("unchecked") + Class<? extends Driver> clazz = (Class<? extends Driver>) Class.forName(driverClassName); + DriverManager.registerDriver(clazz.newInstance()); + } catch (Exception e) { + throw new RuntimeException("Can't load or register JDBC driver for " + dbms + " (" + driverClassName + ")", e); + } + + try { + conn = DriverManager.getConnection(url, user, pass); + } catch (SQLException e) { + throw new RuntimeException("Can't establish database connection (" + url + ")"); + } + } + + /** + * Builds a new reader against current connection and a File containing a SELECT statement. + * @param name + * @param queryFile + * @return + * @throws IOException + */ + public MVDataReader newReader(String name, File queryFile) throws IOException { + return new SQLRelDataReader(name, conn, queryFile); + } + + /** + * Builds a new reader against current connection and a String containing a SELECT statement. + * @param name + * @param query + * @return + * @throws IOException + */ + public MVDataReader newReader(String name, String query) { + return new SQLRelDataReader(name, conn, query); + } + + /** + * Close the current database connection. + */ + @Override + public void close() throws IOException { + try { + conn.close(); + } catch (SQLException e) { + throw new IOException("Exception occured while trying to close the SQL connection", e); + } + } + + /** + * @return the current database connection (useful for JUnit tests) + */ + public Connection getConn() { + return conn; + } +} |