org.hibernate.dialect.resolver.BasicDialectResolver Maven / Gradle / Ivy
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2008, Red Hat Middleware LLC or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors. All third-party contributions are
* distributed under license by Red Hat Middleware LLC.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program 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 Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*
*/
package org.hibernate.dialect.resolver;
import java.sql.DatabaseMetaData;
import java.sql.SQLException;
import org.hibernate.dialect.Dialect;
import org.hibernate.HibernateException;
/**
* Intended as support for custom resolvers.
*
* @author Steve Ebersole
*/
public class BasicDialectResolver extends AbstractDialectResolver {
public static final int VERSION_INSENSITIVE_VERSION = -9999;
private final String matchingName;
private final int matchingVersion;
private final Class dialectClass;
public BasicDialectResolver(String matchingName, Class dialectClass) {
this( matchingName, VERSION_INSENSITIVE_VERSION, dialectClass );
}
public BasicDialectResolver(String matchingName, int matchingVersion, Class dialectClass) {
this.matchingName = matchingName;
this.matchingVersion = matchingVersion;
this.dialectClass = dialectClass;
}
protected final Dialect resolveDialectInternal(DatabaseMetaData metaData) throws SQLException {
final String databaseName = metaData.getDatabaseProductName();
final int databaseMajorVersion = metaData.getDatabaseMajorVersion();
if ( matchingName.equalsIgnoreCase( databaseName )
&& ( matchingVersion == VERSION_INSENSITIVE_VERSION || matchingVersion == databaseMajorVersion ) ) {
try {
return ( Dialect ) dialectClass.newInstance();
}
catch ( HibernateException e ) {
// conceivable that the dialect ctor could throw HibernateExceptions, so don't re-wrap
throw e;
}
catch ( Throwable t ) {
throw new HibernateException(
"Could not instantiate specified Dialect class [" + dialectClass.getName() + "]",
t
);
}
}
return null;
}
}