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Cayenne Object Persistence Framework

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 *  to you under the Apache License, Version 2.0 (the
 *  "License"); you may not use this file except in compliance
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package org.apache.cayenne.dba.hsqldb;

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

import org.apache.cayenne.dba.DbAdapter;
import org.apache.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();
    }
}