JDBCExternalDatabaseFactory.java

/*******************************************************************************
 * Copyright (c) 1998, 2015 Oracle and/or its affiliates. All rights reserved.
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
 * which accompanies this distribution.
 * The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
 * and the Eclipse Distribution License is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * Contributors:
 *     Oracle - initial API and implementation from Oracle TopLink
******************************************************************************/
package org.eclipse.persistence.tools.workbench.mappingsmodel.spi.db.jdbc;

import java.sql.Connection;

import org.eclipse.persistence.tools.workbench.mappingsmodel.spi.db.ExternalDatabase;
import org.eclipse.persistence.tools.workbench.mappingsmodel.spi.db.ExternalDatabaseFactory;
import org.eclipse.persistence.tools.workbench.utility.string.StringTools;


/**
 * Not much to say here: This is a factory for generating instances of
 * the "JDBC" implementation of ExternalDatabase, which uses a
 * java.sql.Connection ExternalTables etc.
 */
public final class JDBCExternalDatabaseFactory
    implements ExternalDatabaseFactory
{

    /** the singleton */
    private static ExternalDatabaseFactory INSTANCE;


    /**
     * Singleton support.
     */
    public static synchronized ExternalDatabaseFactory instance() {
        if (INSTANCE == null) {
            INSTANCE = new JDBCExternalDatabaseFactory();
        }
        return INSTANCE;
    }

    /**
     * Private constructor - use the singleton.
     */
    private JDBCExternalDatabaseFactory() {
        super();
    }

    /**
     * @see org.eclipse.persistence.tools.workbench.mappingsmodel.spi.db.ExternalDatabaseFactory#buildDatabase(java.sql.Connection)
     */
    public ExternalDatabase buildDatabase(Connection connection) {
        return new JDBCExternalDatabase(connection);
    }

    /**
     * @see Object#toString()
     */
    public String toString() {
        return StringTools.buildToStringFor(this, "singleton");
    }

}