org.objectstyle.cayenne.dba.hsqldb.HSQLDBSniffer Maven / Gradle / Ivy

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Cayenne Object Persistence Framework
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/* ====================================================================
*
* The ObjectStyle Group Software License, version 1.1
* ObjectStyle Group - http://objectstyle.org/
* 
* Copyright (c) 2002-2005, Andrei (Andrus) Adamchik and individual authors
* of the software. All rights reserved.
* 
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in
*    the documentation and/or other materials provided with the
*    distribution.
* 
* 3. The end-user documentation included with the redistribution, if any,
*    must include the following acknowlegement:
*    "This product includes software developed by independent contributors
*    and hosted on ObjectStyle Group web site (http://objectstyle.org/)."
*    Alternately, this acknowlegement may appear in the software itself,
*    if and wherever such third-party acknowlegements normally appear.
* 
* 4. The names "ObjectStyle Group" and "Cayenne" must not be used to endorse
*    or promote products derived from this software without prior written
*    permission. For written permission, email
*    "andrus at objectstyle dot org".
* 
* 5. Products derived from this software may not be called "ObjectStyle"
*    or "Cayenne", nor may "ObjectStyle" or "Cayenne" appear in their
*    names without prior written permission.
* 
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
* 
* This software consists of voluntary contributions made by many
* individuals and hosted on ObjectStyle Group web site.  For more
* information on the ObjectStyle Group, please see
* .
*/
package org.objectstyle.cayenne.dba.hsqldb;

import java.sql.DatabaseMetaData;
import java.sql.SQLException;

import org.objectstyle.cayenne.dba.DbAdapter;
import org.objectstyle.cayenne.dba.DbAdapterFactory;

/**
 * Detects HSQLDB database from JDBC metadata.
 * 
 * @since 1.2
 * @author Andrei Adamchik
 */
public class HSQLDBSniffer implements DbAdapterFactory {

    public DbAdapter createAdapter(DatabaseMetaData md) throws SQLException {
        String dbName = md.getDatabaseProductName();
        if (dbName == null || dbName.toUpperCase().indexOf("HSQL") < 0) {
            return null;
        }

        boolean supportsSchema = false;
        if (md.getDriverMajorVersion() < 1) {
            supportsSchema = true;
        }
        else if (md.getDriverMajorVersion() == 1) {
            if (md.getDriverMinorVersion() <= 8) {
                supportsSchema = true;
            }
            else {
                supportsSchema = false;
            }
        }
        else {
            supportsSchema = false;
        }
        
        return supportsSchema
            ? new HSQLDBAdapter()
            : new HSQLDBNoSchemaAdapter();
    }
}