com.nextep.designer.sqlgen.db2.impl.DB2DatabaseConnector.java Source code

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Here is the source code for com.nextep.designer.sqlgen.db2.impl.DB2DatabaseConnector.java

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/*******************************************************************************
 * Copyright (c) 2011 neXtep Software and contributors.
 * All rights reserved.
 *
 * This file is part of neXtep designer.
 *
 * NeXtep designer 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 any later version.
 *
 * NeXtep designer 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 Foobar.  If not, see <http://www.gnu.org/licenses/>.
 *
 * Contributors:
 *     neXtep Softwares - initial API and implementation
 *******************************************************************************/
package com.nextep.designer.sqlgen.db2.impl;

import java.sql.Connection;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Properties;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import com.nextep.designer.core.model.IConnection;
import com.nextep.designer.sqlgen.helpers.CaptureHelper;
import com.nextep.designer.sqlgen.model.base.AbstractDatabaseConnector;

/**
 * @author Bruno Gautier
 * @author Christophe Fondacci
 */
public final class DB2DatabaseConnector extends AbstractDatabaseConnector {

    private static final Log LOGGER = LogFactory.getLog(DB2DatabaseConnector.class);
    private static final String DB2_JDBC_DRIVER_CLASSNAME = "com.ibm.db2.jcc.DB2Driver"; //$NON-NLS-1$

    @Override
    public Connection getConnection(IConnection conn) throws SQLException {
        final String connURL = getConnectionURL(conn);
        LOGGER.info("Connecting to DB2 database from URL [" + connURL + "]..."); //$NON-NLS-2$
        Connection connection = null;
        try {
            connection = getDriver().connect(connURL, getConnectionInfo(conn));
        } catch (SQLException sqle) {
            LOGGER.error("Unable to connect to DB2 database: " + sqle.getMessage(), sqle);
            throw sqle;
        }
        LOGGER.info("DB2 connection established");
        return connection;
    }

    @Override
    public void doPostConnectionSettings(IConnection conn, Connection sqlConn) throws SQLException {
        final String schema = conn.getSchema();
        /*
         * If schema is set to a non-empty value, we set the first value of the CURRENT PATH with
         * the specified schema. We don't need to set the CURRENT SCHEMA variable as it is already
         * set with the connection properties.
         */
        if (schema != null && !"".equals(schema.trim())) { //$NON-NLS-1$
            Statement stmt = null;
            try {
                stmt = sqlConn.createStatement();
                stmt.execute("SET CURRENT PATH " + schema + ", CURRENT PATH"); //$NON-NLS-1$ //$NON-NLS-2$
            } catch (SQLException sqle) {
                LOGGER.error("Unable to set the DB2 current path: " + sqle.getMessage(), sqle);
                throw sqle;
            } finally {
                CaptureHelper.safeClose(null, stmt);
            }
        }
    }

    @Override
    public String getConnectionURL(IConnection conn) {
        final String host = conn.getServerIP();
        final String port = conn.getServerPort();
        final String database = conn.getDatabase();
        return "jdbc:db2://" + host + ":" + port + "/" + database; //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
    }

    @Override
    public Properties getConnectionInfo(IConnection conn) {
        final Properties info = super.getConnectionInfo(conn);
        final String schema = conn.getSchema();
        /*
         * If a non-empty schema name has been specified in connection settings, we set the
         * currentSchema property.
         */
        if (schema != null && !"".equals(schema.trim())) { //$NON-NLS-1$
            info.put("currentSchema", getSchema(conn)); //$NON-NLS-1$
        }
        return info;
    }

    @Override
    public String getJDBCDriverClassName() {
        return DB2_JDBC_DRIVER_CLASSNAME;
    }

    /**
     * Returns the formatted schema name of the specified connection if available, the formatted
     * user name otherwise.
     * 
     * @param conn a {@link IConnection}
     * @return a <code>String</code> representing the schema name of the specified connection
     */
    @Override
    public String getSchema(IConnection conn) {
        final String schema = conn.getSchema();
        if (schema == null || "".equals(schema.trim())) { //$NON-NLS-1$
            final String user = conn.getLogin();
            if (user != null && !"".equals(user.trim())) { //$NON-NLS-1$
                // User name is trimmed by the vendor formatter
                return conn.getDBVendor().getNameFormatter().format(user);
            }
            return null;
        }
        // Schema name is trimmed by the vendor formatter
        return conn.getDBVendor().getNameFormatter().format(schema);
    }

}