org.hibernate.engine.jdbc.dialect.spi.BasicDialectResolver Maven / Gradle / Ivy
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2010, Red Hat Inc. 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 Inc.
*
* 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
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*/
package org.hibernate.engine.jdbc.dialect.spi;
import org.hibernate.HibernateException;
import org.hibernate.dialect.Dialect;
import static org.hibernate.engine.jdbc.dialect.spi.DialectResolutionInfo.NO_VERSION;
/**
* Intended as support for custom resolvers which match a single db name (with optional version info).
*
* @author Steve Ebersole
*/
public class BasicDialectResolver implements DialectResolver {
private final String nameToMatch;
private final int majorVersionToMatch;
private final int minorVersionToMatch;
private final Class dialectClass;
/**
* Constructs a BasicDialectResolver
*
* @param nameToMatch The name of the driver to match on
* @param dialectClass The Dialect class to use on match
*/
public BasicDialectResolver(String nameToMatch, Class dialectClass) {
this( nameToMatch, NO_VERSION, dialectClass );
}
/**
* Constructs a BasicDialectResolver
*
* @param nameToMatch The name of the driver to match on
* @param majorVersionToMatch The version of the driver to match on
* @param dialectClass The Dialect class to use on match
*/
public BasicDialectResolver(String nameToMatch, int majorVersionToMatch, Class dialectClass) {
this( nameToMatch, majorVersionToMatch, NO_VERSION, dialectClass );
}
/**
* Constructs a BasicDialectResolver
*
* @param nameToMatch The name of the driver to match on
* @param majorVersionToMatch The version of the driver to match on
* @param dialectClass The Dialect class to use on match
*/
public BasicDialectResolver(String nameToMatch, int majorVersionToMatch, int minorVersionToMatch, Class dialectClass) {
this.nameToMatch = nameToMatch;
this.majorVersionToMatch = majorVersionToMatch;
this.minorVersionToMatch = minorVersionToMatch;
this.dialectClass = dialectClass;
}
@Override
public final Dialect resolveDialect(DialectResolutionInfo info) {
final String databaseName = info.getDatabaseName();
final int databaseMajorVersion = info.getDatabaseMajorVersion();
final int databaseMinorVersion = info.getDatabaseMinorVersion();
if ( nameToMatch.equalsIgnoreCase( databaseName )
&& ( majorVersionToMatch == NO_VERSION || majorVersionToMatch == databaseMajorVersion )
&& ( minorVersionToMatch == NO_VERSION || majorVersionToMatch == databaseMinorVersion ) ) {
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;
}
}