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HHH-2933 : DialectResolver 

git-svn-id: https://svn.jboss.org/repos/hibernate/core/trunk@15343 1b8cb986-b30d-0410-93ca-fae66ebed9b2
This commit is contained in:
Steve Ebersole 2008-10-13 15:29:23 +00:00
parent 1c27ee9bb5
commit 13ddb15f29
15 changed files with 1301 additions and 244 deletions
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7
core/src/main/java/org/hibernate/cfg/Environment.java
View File

@ -240,6 +240,13 @@ public final class Environment {
* Hibernate SQL {@link org.hibernate.dialect.Dialect} class
*/
public static final String DIALECT ="hibernate.dialect";
/**
* {@link org.hibernate.dialect.resolver.DialectResolver} classes to register with the
* {@link org.hibernate.dialect.resolver.DialectFactory}
*/
public static final String DIALECT_RESOLVERS = "hibernate.dialect_resolvers";
/**
* A default database schema (owner) name to use for unqualified tablenames
*/

70
core/src/main/java/org/hibernate/cfg/SettingsFactory.java
View File

@ -25,7 +25,6 @@
package org.hibernate.cfg;
import java.io.Serializable;
import java.lang.reflect.Method;
import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.ResultSet;
@ -47,7 +46,7 @@ import org.hibernate.cache.impl.bridge.RegionFactoryCacheProviderBridge;
import org.hibernate.connection.ConnectionProvider;
import org.hibernate.connection.ConnectionProviderFactory;
import org.hibernate.dialect.Dialect;
import org.hibernate.dialect.DialectFactory;
import org.hibernate.dialect.resolver.DialectFactory;
import org.hibernate.exception.SQLExceptionConverter;
import org.hibernate.exception.SQLExceptionConverterFactory;
import org.hibernate.hql.QueryTranslatorFactory;
@ -64,14 +63,15 @@ import org.hibernate.util.ReflectHelper;
import org.hibernate.util.StringHelper;
/**
* Reads configuration properties and configures a <tt>Settings</tt> instance.
* Reads configuration properties and builds a {@link Settings} instance.
*
* @author Gavin King
*/
public class SettingsFactory implements Serializable {
private static final Logger log = LoggerFactory.getLogger( SettingsFactory.class );
private static final long serialVersionUID = -1194386144994524825L;
public static final String DEF_CACHE_REG_FACTORY = NoCachingRegionFactory.class.getName();
private static final Logger log = LoggerFactory.getLogger(SettingsFactory.class);
protected SettingsFactory() {
}
@ -91,17 +91,17 @@ public class SettingsFactory implements Serializable {
//Interrogate JDBC metadata
String databaseName = null;
int databaseMajorVersion = 0;
boolean metaSupportsScrollable = false;
boolean metaSupportsGetGeneratedKeys = false;
boolean metaSupportsBatchUpdates = false;
boolean metaReportsDDLCausesTxnCommit = false;
boolean metaReportsDDLInTxnSupported = true;
Dialect dialect = null;
// 'hibernate.temp.use_jdbc_metadata_defaults' is a temporary magic value.
// The need for it is intended to be alleviated with 3.3 developement, thus it is
// The need for it is intended to be alleviated with future developement, thus it is
// not defined as an Environment constant...
//
// it is used to control whether we should consult the JDBC metadata to determine
// certain Settings default values; it is useful to *not* do this when the database
// may not be available (mainly in tools usage).
@ -111,43 +111,45 @@ public class SettingsFactory implements Serializable {
Connection conn = connections.getConnection();
try {
DatabaseMetaData meta = conn.getMetaData();
databaseName = meta.getDatabaseProductName();
databaseMajorVersion = getDatabaseMajorVersion(meta);
log.info("RDBMS: " + databaseName + ", version: " + meta.getDatabaseProductVersion() );
log.info("JDBC driver: " + meta.getDriverName() + ", version: " + meta.getDriverVersion() );
log.info( "RDBMS: " + meta.getDatabaseProductName() + ", version: " + meta.getDatabaseProductVersion() );
log.info( "JDBC driver: " + meta.getDriverName() + ", version: " + meta.getDriverVersion() );
metaSupportsScrollable = meta.supportsResultSetType(ResultSet.TYPE_SCROLL_INSENSITIVE);
dialect = DialectFactory.buildDialect( props, conn );
metaSupportsScrollable = meta.supportsResultSetType( ResultSet.TYPE_SCROLL_INSENSITIVE );
metaSupportsBatchUpdates = meta.supportsBatchUpdates();
metaReportsDDLCausesTxnCommit = meta.dataDefinitionCausesTransactionCommit();
metaReportsDDLInTxnSupported = !meta.dataDefinitionIgnoredInTransactions();
metaSupportsGetGeneratedKeys = meta.supportsGetGeneratedKeys();
metaSupportsGetGeneratedKeys = meta.supportsGetGeneratedKeys();
}
catch (SQLException sqle) {
log.warn("Could not obtain connection metadata", sqle);
catch ( SQLException sqle ) {
log.warn( "Could not obtain connection metadata", sqle );
}
finally {
connections.closeConnection(conn);
connections.closeConnection( conn );
}
}
catch (SQLException sqle) {
log.warn("Could not obtain connection to query metadata", sqle);
catch ( SQLException sqle ) {
log.warn( "Could not obtain connection to query metadata", sqle );
dialect = DialectFactory.buildDialect( props );
}
catch (UnsupportedOperationException uoe) {
catch ( UnsupportedOperationException uoe ) {
// user supplied JDBC connections
dialect = DialectFactory.buildDialect( props );
}
}
else {
dialect = DialectFactory.buildDialect( props );
}
settings.setDataDefinitionImplicitCommit( metaReportsDDLCausesTxnCommit );
settings.setDataDefinitionInTransactionSupported( metaReportsDDLInTxnSupported );
//SQL Dialect:
Dialect dialect = determineDialect( props, databaseName, databaseMajorVersion );
settings.setDialect(dialect);
settings.setDialect( dialect );
//use dialect default properties
final Properties properties = new Properties();
properties.putAll( dialect.getDefaultProperties() );
properties.putAll(props);
properties.putAll( props );
// Transaction settings:
@ -348,20 +350,6 @@ public class SettingsFactory implements Serializable {
}
}
private int getDatabaseMajorVersion(DatabaseMetaData meta) {
try {
Method gdbmvMethod = DatabaseMetaData.class.getMethod("getDatabaseMajorVersion", null);
return ( (Integer) gdbmvMethod.invoke(meta, null) ).intValue();
}
catch (NoSuchMethodException nsme) {
return 0;
}
catch (Throwable t) {
log.debug("could not get database version from JDBC metadata");
return 0;
}
}
private static String enabledDisabled(boolean value) {
return value ? "enabled" : "disabled";
}
@ -445,8 +433,4 @@ public class SettingsFactory implements Serializable {
return TransactionManagerLookupFactory.getTransactionManagerLookup(properties);
}
private Dialect determineDialect(Properties props, String databaseName, int databaseMajorVersion) {
return DialectFactory.buildDialect( props, databaseName, databaseMajorVersion );
}
}

179
core/src/main/java/org/hibernate/dialect/DialectFactory.java
View File

@ -1,179 +0,0 @@
/*
* 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;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;
import org.hibernate.HibernateException;
import org.hibernate.cfg.Environment;
import org.hibernate.util.ReflectHelper;
/**
* A factory for generating Dialect instances.
*
* @author Steve Ebersole
*/
public class DialectFactory {
/**
* Builds an appropriate Dialect instance.
* <p/>
* If a dialect is explicitly named in the incoming properties, it is used. Otherwise, the database name and version
* (obtained from connection metadata) are used to make the dertemination.
* <p/>
* An exception is thrown if a dialect was not explicitly set and the database name is not known.
*
* @param props The configuration properties.
* @param databaseName The name of the database product (obtained from metadata).
* @param databaseMajorVersion The major version of the database product (obtained from metadata).
*
* @return The appropriate dialect.
*
* @throws HibernateException No dialect specified and database name not known.
*/
public static Dialect buildDialect(Properties props, String databaseName, int databaseMajorVersion)
throws HibernateException {
String dialectName = props.getProperty( Environment.DIALECT );
if ( dialectName == null ) {
return determineDialect( databaseName, databaseMajorVersion );
}
else {
return buildDialect( dialectName );
}
}
/**
* Determine the appropriate Dialect to use given the database product name
* and major version.
*
* @param databaseName The name of the database product (obtained from metadata).
* @param databaseMajorVersion The major version of the database product (obtained from metadata).
*
* @return An appropriate dialect instance.
*/
public static Dialect determineDialect(String databaseName, int databaseMajorVersion) {
if ( databaseName == null ) {
throw new HibernateException( "Hibernate Dialect must be explicitly set" );
}
DatabaseDialectMapper mapper = ( DatabaseDialectMapper ) MAPPERS.get( databaseName );
if ( mapper == null ) {
throw new HibernateException( "Hibernate Dialect must be explicitly set for database: " + databaseName );
}
String dialectName = mapper.getDialectClass( databaseMajorVersion );
return buildDialect( dialectName );
}
/**
* Returns a dialect instance given the name of the class to use.
*
* @param dialectName The name of the dialect class.
*
* @return The dialect instance.
*/
public static Dialect buildDialect(String dialectName) {
try {
return ( Dialect ) ReflectHelper.classForName( dialectName ).newInstance();
}
catch ( ClassNotFoundException cnfe ) {
throw new HibernateException( "Dialect class not found: " + dialectName );
}
catch ( Exception e ) {
throw new HibernateException( "Could not instantiate dialect class", e );
}
}
/**
* For a given database product name, instances of
* DatabaseDialectMapper know which Dialect to use for different versions.
*/
public static interface DatabaseDialectMapper {
public String getDialectClass(int majorVersion);
}
/**
* A simple DatabaseDialectMapper for dialects which are independent
* of the underlying database product version.
*/
public static class VersionInsensitiveMapper implements DatabaseDialectMapper {
private String dialectClassName;
public VersionInsensitiveMapper(String dialectClassName) {
this.dialectClassName = dialectClassName;
}
public String getDialectClass(int majorVersion) {
return dialectClassName;
}
}
// TODO : this is the stuff it'd be nice to move to a properties file or some other easily user-editable place
private static final Map MAPPERS = new HashMap();
static {
// detectors...
MAPPERS.put( "HSQL Database Engine", new VersionInsensitiveMapper( "org.hibernate.dialect.HSQLDialect" ) );
MAPPERS.put( "H2", new VersionInsensitiveMapper( "org.hibernate.dialect.H2Dialect" ) );
MAPPERS.put( "MySQL", new VersionInsensitiveMapper( "org.hibernate.dialect.MySQLDialect" ) );
MAPPERS.put( "PostgreSQL", new VersionInsensitiveMapper( "org.hibernate.dialect.PostgreSQLDialect" ) );
MAPPERS.put( "Apache Derby", new VersionInsensitiveMapper( "org.hibernate.dialect.DerbyDialect" ) );
MAPPERS.put( "Ingres", new VersionInsensitiveMapper( "org.hibernate.dialect.IngresDialect" ) );
MAPPERS.put( "ingres", new VersionInsensitiveMapper( "org.hibernate.dialect.IngresDialect" ) );
MAPPERS.put( "INGRES", new VersionInsensitiveMapper( "org.hibernate.dialect.IngresDialect" ) );
MAPPERS.put( "Microsoft SQL Server Database", new VersionInsensitiveMapper( "org.hibernate.dialect.SQLServerDialect" ) );
MAPPERS.put( "Microsoft SQL Server", new VersionInsensitiveMapper( "org.hibernate.dialect.SQLServerDialect" ) );
MAPPERS.put( "Sybase SQL Server", new VersionInsensitiveMapper( "org.hibernate.dialect.SybaseDialect" ) );
MAPPERS.put( "Adaptive Server Enterprise", new VersionInsensitiveMapper( "org.hibernate.dialect.SybaseDialect" ) );
MAPPERS.put( "Informix Dynamic Server", new VersionInsensitiveMapper( "org.hibernate.dialect.InformixDialect" ) );
// thanks goodness for "universal" databases...
MAPPERS.put( "DB2/NT", new VersionInsensitiveMapper( "org.hibernate.dialect.DB2Dialect" ) );
MAPPERS.put( "DB2/LINUX", new VersionInsensitiveMapper( "org.hibernate.dialect.DB2Dialect" ) );
MAPPERS.put( "DB2/6000", new VersionInsensitiveMapper( "org.hibernate.dialect.DB2Dialect" ) );
MAPPERS.put( "DB2/HPUX", new VersionInsensitiveMapper( "org.hibernate.dialect.DB2Dialect" ) );
MAPPERS.put( "DB2/SUN", new VersionInsensitiveMapper( "org.hibernate.dialect.DB2Dialect" ) );
MAPPERS.put( "DB2/LINUX390", new VersionInsensitiveMapper( "org.hibernate.dialect.DB2Dialect" ) );
MAPPERS.put( "DB2/AIX64", new VersionInsensitiveMapper( "org.hibernate.dialect.DB2Dialect" ) );
MAPPERS.put(
"Oracle",
new DatabaseDialectMapper() {
public String getDialectClass(int majorVersion) {
switch ( majorVersion ) {
case 8: return Oracle8iDialect.class.getName();
case 9: return Oracle9iDialect.class.getName();
case 10: return Oracle10gDialect.class.getName();
default: throw new HibernateException( "unknown Oracle major version [" + majorVersion + "]" );
}
}
}
);
}
}

80
core/src/main/java/org/hibernate/dialect/resolver/AbstractDialectResolver.java Normal file
View File

@ -0,0 +1,80 @@
/*
* 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.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.hibernate.dialect.Dialect;
import org.hibernate.exception.JDBCConnectionException;
import org.hibernate.JDBCException;
/**
* A templated resolver impl which delegates to the {@link #resolveDialectInternal} method
* and handles any thrown {@link SQLException}s.
*
* @author Steve Ebersole
*/
public abstract class AbstractDialectResolver implements DialectResolver {
private static final Logger log = LoggerFactory.getLogger( AbstractDialectResolver.class );
/**
* {@inheritDoc}
* <p/>
* Here we template the resolution, delegating to {@link #resolveDialectInternal} and handling
* {@link java.sql.SQLException}s properly.
*/
public final Dialect resolveDialect(DatabaseMetaData metaData) {
try {
return resolveDialectInternal( metaData );
}
catch ( SQLException sqlException ) {
JDBCException jdbcException = BasicSQLExceptionConverter.INSTANCE.convert( sqlException );
if ( jdbcException instanceof JDBCConnectionException ) {
throw jdbcException;
}
else {
log.warn( BasicSQLExceptionConverter.MSG + " : " + sqlException.getMessage() );
return null;
}
}
catch ( Throwable t ) {
log.warn( "Error executing resolver [" + this + "] : " + t.getMessage() );
return null;
}
}
/**
* Perform the actual resolution without caring about handling {@link SQLException}s.
*
* @param metaData The database metadata
* @return The resolved dialect, or null if we could not resolve.
* @throws SQLException Indicates problems accessing the metadata.
*/
protected abstract Dialect resolveDialectInternal(DatabaseMetaData metaData) throws SQLException;
}

78
core/src/main/java/org/hibernate/dialect/resolver/BasicDialectResolver.java Normal file
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@ -0,0 +1,78 @@
/*
* 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;
}
}

62
core/src/main/java/org/hibernate/dialect/resolver/BasicSQLExceptionConverter.java Normal file
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@ -0,0 +1,62 @@
/*
* 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.SQLException;
import org.hibernate.exception.SQLStateConverter;
import org.hibernate.exception.ViolatedConstraintNameExtracter;
import org.hibernate.JDBCException;
/**
* A helper to centralize conversion of {@link java.sql.SQLException}s to {@link org.hibernate.JDBCException}s.
*
* @author Steve Ebersole
*/
public class BasicSQLExceptionConverter {
public static final BasicSQLExceptionConverter INSTANCE = new BasicSQLExceptionConverter();
public static final String MSG = "Unable to query java.sql.DatabaseMetaData";
private static final SQLStateConverter CONVERTER = new SQLStateConverter( new ConstraintNameExtracter() );
/**
* Perform a conversion.
*
* @param sqlException The exception to convert.
* @return The converted exception.
*/
public JDBCException convert(SQLException sqlException) {
return CONVERTER.convert( sqlException, MSG, null );
}
private static class ConstraintNameExtracter implements ViolatedConstraintNameExtracter {
/**
* {@inheritDoc}
*/
public String extractConstraintName(SQLException sqle) {
return "???";
}
}
}

166
core/src/main/java/org/hibernate/dialect/resolver/DialectFactory.java Normal file
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@ -0,0 +1,166 @@
/*
* 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.Connection;
import java.sql.SQLException;
import java.sql.DatabaseMetaData;
import java.util.Properties;
import org.hibernate.HibernateException;
import org.hibernate.dialect.resolver.DialectResolver;
import org.hibernate.dialect.resolver.DialectResolverSet;
import org.hibernate.dialect.resolver.StandardDialectResolver;
import org.hibernate.dialect.Dialect;
import org.hibernate.cfg.Environment;
import org.hibernate.util.ReflectHelper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* A factory for generating Dialect instances.
*
* @author Steve Ebersole
* @author Tomoto Shimizu Washio
*/
public class DialectFactory {
private static final Logger log = LoggerFactory.getLogger( DialectFactory.class );
private static DialectResolverSet DIALECT_RESOLVERS = new DialectResolverSet();
static {
// register the standard dialect resolver
DIALECT_RESOLVERS.addResolver( new StandardDialectResolver() );
// register resolvers set via Environment property
String userSpecifedResolverSetting = Environment.getProperties().getProperty( Environment.DIALECT_RESOLVERS );
if ( userSpecifedResolverSetting != null ) {
String[] userSpecifedResolvers = userSpecifedResolverSetting.split( "\\s+" );
for ( int i = 0; i < userSpecifedResolvers.length; i++ ) {
registerDialectResolver( userSpecifedResolvers[i] );
}
}
}
/*package*/ static void registerDialectResolver(String resolverName) {
try {
DialectResolver resolver = ( DialectResolver ) ReflectHelper.classForName( resolverName ).newInstance();
DIALECT_RESOLVERS.addResolverAtFirst( resolver );
}
catch ( ClassNotFoundException cnfe ) {
log.warn( "Dialect resolver class not found: " + resolverName );
}
catch ( Exception e ) {
log.warn( "Could not instantiate dialect resolver class", e );
}
}
/**
* Builds an appropriate Dialect instance.
* <p/>
* If a dialect is explicitly named in the incoming properties, it is used. Otherwise, it is
* determined by dialect resolvers based on the passed connection.
* <p/>
* An exception is thrown if a dialect was not explicitly set and no resolver could make
* the determination from the given connection.
*
* @param properties The configuration properties.
* @param connection The configured connection.
* @return The appropriate dialect instance.
* @throws HibernateException No dialect specified and no resolver could make the determination.
*/
public static Dialect buildDialect(Properties properties, Connection connection) throws HibernateException {
String dialectName = properties.getProperty( Environment.DIALECT );
if ( dialectName == null ) {
return determineDialect( connection );
}
else {
return constructDialect( dialectName );
}
}
public static Dialect buildDialect(Properties properties) {
String dialectName = properties.getProperty( Environment.DIALECT );
if ( dialectName == null ) {
throw new HibernateException( "'hibernate.dialect' must be set when no Connection avalable" );
}
return constructDialect( dialectName );
}
/**
* Determine the appropriate Dialect to use given the connection.
*
* @param connection The configured connection.
* @return The appropriate dialect instance.
*
* @throws HibernateException No connection given or no resolver could make
* the determination from the given connection.
*/
private static Dialect determineDialect(Connection connection) {
if ( connection == null ) {
throw new HibernateException( "Connection cannot be null when 'hibernate.dialect' not set" );
}
try {
final DatabaseMetaData databaseMetaData = connection.getMetaData();
final Dialect dialect = DIALECT_RESOLVERS.resolveDialect( databaseMetaData );
if ( dialect == null ) {
throw new HibernateException(
"Unable to determine Dialect to use [name=" + databaseMetaData.getDatabaseProductName() +
", majorVersion=" + databaseMetaData.getDatabaseMajorVersion() +
"]; user must register resolver or explicitly set 'hibernate.dialect'"
);
}
return dialect;
}
catch ( SQLException sqlException ) {
throw new HibernateException(
"Unable to access java.sql.DatabaseMetaData to determine appropriate Dialect to use",
sqlException
);
}
}
/**
* Returns a dialect instance given the name of the class to use.
*
* @param dialectName The name of the dialect class.
*
* @return The dialect instance.
*/
public static Dialect constructDialect(String dialectName) {
try {
return ( Dialect ) ReflectHelper.classForName( dialectName ).newInstance();
}
catch ( ClassNotFoundException cnfe ) {
throw new HibernateException( "Dialect class not found: " + dialectName, cnfe );
}
catch ( Exception e ) {
throw new HibernateException( "Could not instantiate dialect class", e );
}
}
}

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/*
* 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.Connection;
import java.sql.DatabaseMetaData;
import org.hibernate.dialect.Dialect;
import org.hibernate.exception.JDBCConnectionException;
/**
* Contract for determining the {@link Dialect} to use based on a JDBC {@link Connection}.
*
* @author Tomoto Shimizu Washio
* @author Steve Ebersole
*/
public interface DialectResolver {
/**
* Determine the {@link Dialect} to use based on the given JDBC {@link DatabaseMetaData}. Implementations are
* expected to return the {@link Dialect} instance to use, or null if the {@link DatabaseMetaData} does not match
* the criteria handled by this impl.
*
* @param metaData The JDBC metadata.
* @return The dialect to use, or null.
* @throws JDBCConnectionException Indicates a 'non transient connection problem', which indicates that
* we should stop resolution attempts.
*/
public Dialect resolveDialect(DatabaseMetaData metaData) throws JDBCConnectionException;
}

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/*
* 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.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.hibernate.dialect.Dialect;
import org.hibernate.exception.JDBCConnectionException;
/**
* A {@link DialectResolver} implementation which coordinates resolution by delegating to its
* registered sub-resolvers. Sub-resolvers may be registered by calling either {@link #addResolver} or
* {@link #addResolverAtFirst}.
*
* @author Tomoto Shimizu Washio
*/
public class DialectResolverSet implements DialectResolver {
private static Logger log = LoggerFactory.getLogger( DialectResolverSet.class );
private List resolvers = new ArrayList();
/**
* {@inheritDoc}
*/
public Dialect resolveDialect(DatabaseMetaData metaData) {
Iterator i = resolvers.iterator();
while ( i.hasNext() ) {
final DialectResolver resolver = ( DialectResolver ) i.next();
try {
Dialect dialect = resolver.resolveDialect( metaData );
if ( dialect != null ) {
return dialect;
}
}
catch ( JDBCConnectionException e ) {
throw e;
}
catch ( Throwable t ) {
log.info( "sub-resolver threw unexpected exception, continuing to next : " + t.getMessage() );
}
}
return null;
}
/**
* Add a resolver at the end of the underlying resolver list. The resolver added by this method is at lower
* priority than any other existing resolvers.
*
* @param resolver The resolver to add.
*/
public void addResolver(DialectResolver resolver) {
resolvers.add( resolver );
}
/**
* Add a resolver at the beginning of the underlying resolver list. The resolver added by this method is at higher
* priority than any other existing resolvers.
*
* @param resolver The resolver to add.
*/
public void addResolverAtFirst(DialectResolver resolver) {
resolvers.add( 0, resolver );
}
}

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/*
* 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.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.hibernate.dialect.Dialect;
import org.hibernate.dialect.HSQLDialect;
import org.hibernate.dialect.H2Dialect;
import org.hibernate.dialect.MySQLDialect;
import org.hibernate.dialect.PostgreSQLDialect;
import org.hibernate.dialect.DerbyDialect;
import org.hibernate.dialect.IngresDialect;
import org.hibernate.dialect.SQLServerDialect;
import org.hibernate.dialect.SybaseDialect;
import org.hibernate.dialect.InformixDialect;
import org.hibernate.dialect.DB2Dialect;
import org.hibernate.dialect.Oracle10gDialect;
import org.hibernate.dialect.Oracle9iDialect;
import org.hibernate.dialect.Oracle8iDialect;
/**
* The standard Hibernate resolver.
*
* @author Steve Ebersole
*/
public class StandardDialectResolver extends AbstractDialectResolver{
private static final Logger log = LoggerFactory.getLogger( StandardDialectResolver.class );
protected Dialect resolveDialectInternal(DatabaseMetaData metaData) throws SQLException {
String databaseName = metaData.getDatabaseProductName();
int databaseMajorVersion = metaData.getDatabaseMajorVersion();
if ( "HSQL Database Engine".equals( databaseName ) ) {
return new HSQLDialect();
}
if ( "H2".equals( databaseName ) ) {
return new H2Dialect();
}
if ( "MySQL".equals( databaseName ) ) {
return new MySQLDialect();
}
if ( "PostgreSQL".equals( databaseName ) ) {
return new PostgreSQLDialect();
}
if ( "Apache Derby".equals( databaseName ) ) {
return new DerbyDialect();
}
if ( "ingres".equalsIgnoreCase( databaseName ) ) {
return new IngresDialect();
}
if ( databaseName.startsWith( "Microsoft SQL Server" ) ) {
return new SQLServerDialect();
}
if ( "Sybase SQL Server".equals( databaseName ) || "Adaptive Server Enterprise".equals( databaseName ) ) {
return new SybaseDialect();
}
if ( "Informix Dynamic Server".equals( databaseName ) ) {
return new InformixDialect();
}
if ( databaseName.startsWith( "DB2/" ) ) {
return new DB2Dialect();
}
if ( "Oracle".equals( databaseName ) ) {
switch ( databaseMajorVersion ) {
case 11:
log.warn( "Oracle 11g is not yet fully supported; using 10g dialect" );
return new Oracle10gDialect();
case 10:
return new Oracle10gDialect();
case 9:
return new Oracle9iDialect();
case 8:
return new Oracle8iDialect();
default:
log.warn( "unknown Oracle major version [" + databaseMajorVersion + "]" );
}
}
return null;
}
}

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/*
* 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;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.sql.SQLException;
import java.sql.Connection;
import java.sql.DatabaseMetaData;
/**
* TODO : javadoc
*
* @author Steve Ebersole
*/
public class Mocks {
public static Connection createConnection(String dbName, int version) {
DatabaseMetaDataHandler metadataHandler = new DatabaseMetaDataHandler( dbName, version );
ConnectionHandler connectionHandler = new ConnectionHandler();
DatabaseMetaData metadataProxy = ( DatabaseMetaData ) Proxy.newProxyInstance(
ClassLoader.getSystemClassLoader(),
new Class[] { DatabaseMetaData.class },
metadataHandler
);
Connection connectionProxy = ( Connection ) Proxy.newProxyInstance(
ClassLoader.getSystemClassLoader(),
new Class[] { Connection.class },
connectionHandler
);
metadataHandler.setConnectionProxy( connectionProxy );
connectionHandler.setMetadataProxy( metadataProxy );
return connectionProxy;
}
private static class ConnectionHandler implements InvocationHandler {
private DatabaseMetaData metadataProxy;
public void setMetadataProxy(DatabaseMetaData metadataProxy) {
this.metadataProxy = metadataProxy;
}
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
final String methodName = method.getName();
if ( "getMetaData".equals( methodName ) ) {
return metadataProxy;
}
if ( "toString".equals( methodName ) ) {
return "Connection proxy [@" + hashCode() + "]";
}
if ( "hashCode".equals( methodName ) ) {
return new Integer( this.hashCode() );
}
if ( canThrowSQLException( method ) ) {
throw new SQLException();
}
else {
throw new UnsupportedOperationException();
}
}
}
private static class DatabaseMetaDataHandler implements InvocationHandler {
private final String databaseName;
private final int majorVersion;
private Connection connectionProxy;
public void setConnectionProxy(Connection connectionProxy) {
this.connectionProxy = connectionProxy;
}
private DatabaseMetaDataHandler(String databaseName, int majorVersion) {
this.databaseName = databaseName;
this.majorVersion = majorVersion;
}
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
final String methodName = method.getName();
if ( "getDatabaseProductName".equals( methodName ) ) {
return databaseName;
}
if ( "getDatabaseMajorVersion".equals( methodName ) ) {
return new Integer( majorVersion );
}
if ( "getConnection".equals( methodName ) ) {
return connectionProxy;
}
if ( "toString".equals( methodName ) ) {
return "DatabaseMetaData proxy [db-name=" + databaseName + ", version=" + majorVersion + "]";
}
if ( "hashCode".equals( methodName ) ) {
return new Integer( this.hashCode() );
}
if ( canThrowSQLException( method ) ) {
throw new SQLException();
}
else {
throw new UnsupportedOperationException();
}
}
}
private static boolean canThrowSQLException(Method method) {
final Class[] exceptions = method.getExceptionTypes();
for ( int i = 0; i < exceptions.length; i++ ) {
if ( SQLException.class.isAssignableFrom( exceptions[i] ) ) {
return true;
}
}
return false;
}
}

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/*
* 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;
import java.sql.SQLException;
import java.sql.DatabaseMetaData;
import org.hibernate.dialect.resolver.AbstractDialectResolver;
import org.hibernate.dialect.resolver.BasicDialectResolver;
import org.hibernate.HibernateException;
/**
* TODO : javadoc
*
* @author Steve Ebersole
*/
public class TestingDialects {
public static class MyDialect1 extends Dialect {
}
public static class MyDialect21 extends Dialect {
}
public static class MyDialect22 extends Dialect {
}
public static class MySpecialDB2Dialect extends Dialect {
}
public static class MyDialectResolver1 extends AbstractDialectResolver {
protected Dialect resolveDialectInternal(DatabaseMetaData metaData) throws SQLException {
String databaseName = metaData.getDatabaseProductName();
int databaseMajorVersion = metaData.getDatabaseMajorVersion();
if ( "MyDatabase1".equals( databaseName ) ) {
return new MyDialect1();
}
if ( "MyDatabase2".equals( databaseName ) ) {
if ( databaseMajorVersion >= 2 ) {
return new MyDialect22();
}
if ( databaseMajorVersion >= 1 ) {
return new MyDialect21();
}
}
return null;
}
}
public static class MyDialectResolver2 extends BasicDialectResolver {
public MyDialectResolver2() {
super( "MyTrickyDatabase1", MyDialect1.class );
}
}
public static class ErrorDialectResolver1 extends AbstractDialectResolver {
public Dialect resolveDialectInternal(DatabaseMetaData metaData) throws SQLException {
String databaseName = metaData.getDatabaseProductName();
if ( databaseName.equals( "ConnectionErrorDatabase1" ) ) {
throw new SQLException( "Simulated connection error", "08001" );
}
else {
throw new SQLException();
}
}
}
public static class ErrorDialectResolver2 extends AbstractDialectResolver {
public Dialect resolveDialectInternal(DatabaseMetaData metaData) throws SQLException {
String databaseName = metaData.getDatabaseProductName();
if ( databaseName.equals( "ErrorDatabase1" ) ) {
throw new SQLException();
}
if ( databaseName.equals( "ErrorDatabase2" ) ) {
throw new HibernateException( "This is a trap!" );
}
return null;
}
}
public static class MyOverridingDialectResolver1 extends BasicDialectResolver {
public MyOverridingDialectResolver1() {
super( "DB2/MySpecialPlatform", MySpecialDB2Dialect.class );
}
}
}

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/*
* 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.util.Properties;
import java.sql.Connection;
import junit.framework.TestSuite;
import junit.framework.TestCase;
import junit.framework.Test;
import org.hibernate.HibernateException;
import org.hibernate.dialect.resolver.DialectFactory;
import org.hibernate.dialect.HSQLDialect;
import org.hibernate.dialect.H2Dialect;
import org.hibernate.dialect.MySQLDialect;
import org.hibernate.dialect.PostgreSQLDialect;
import org.hibernate.dialect.DerbyDialect;
import org.hibernate.dialect.IngresDialect;
import org.hibernate.dialect.SQLServerDialect;
import org.hibernate.dialect.SybaseDialect;
import org.hibernate.dialect.InformixDialect;
import org.hibernate.dialect.DB2Dialect;
import org.hibernate.dialect.Oracle8iDialect;
import org.hibernate.dialect.Oracle9iDialect;
import org.hibernate.dialect.Oracle10gDialect;
import org.hibernate.dialect.TestingDialects;
import org.hibernate.dialect.Mocks;
import org.hibernate.cfg.Environment;
/**
* TODO : javadoc
*
* @author Steve Ebersole
*/
public class DialectFactoryTest extends TestCase {
public DialectFactoryTest(String name) {
super( name );
}
public static Test suite() {
return new TestSuite( DialectFactoryTest.class );
}
public void testBuildDialectByClass() {
assertEquals(
HSQLDialect.class,
DialectFactory.constructDialect( "org.hibernate.dialect.HSQLDialect" ).getClass()
);
try {
DialectFactory.constructDialect( "org.hibernate.dialect.NoSuchDialect" );
fail();
}
catch ( HibernateException e ) {
assertEquals( "unexpected exception type", e.getCause().getClass(), ClassNotFoundException.class );
}
try {
DialectFactory.constructDialect( "java.lang.Object" );
fail();
}
catch ( HibernateException e ) {
assertEquals( "unexpected exception type", e.getCause().getClass(), ClassCastException.class );
}
}
public void testBuildDialectByProperties() {
Properties props = new Properties();
try {
DialectFactory.buildDialect( props, null );
fail();
}
catch ( HibernateException e ) {
assertNull( e.getCause() );
}
props.setProperty( Environment.DIALECT, "org.hibernate.dialect.HSQLDialect" );
assertTrue( DialectFactory.buildDialect( props, null ) instanceof HSQLDialect );
}
public void testPreregisteredDialects() {
testDetermination( "HSQL Database Engine", HSQLDialect.class );
testDetermination( "H2", H2Dialect.class );
testDetermination( "MySQL", MySQLDialect.class );
testDetermination( "PostgreSQL", PostgreSQLDialect.class );
testDetermination( "Apache Derby", DerbyDialect.class );
testDetermination( "Ingres", IngresDialect.class );
testDetermination( "ingres", IngresDialect.class );
testDetermination( "INGRES", IngresDialect.class );
testDetermination( "Microsoft SQL Server Database", SQLServerDialect.class );
testDetermination( "Microsoft SQL Server", SQLServerDialect.class );
testDetermination( "Sybase SQL Server", SybaseDialect.class );
testDetermination( "Adaptive Server Enterprise", SybaseDialect.class );
testDetermination( "Informix Dynamic Server", InformixDialect.class );
testDetermination( "DB2/NT", DB2Dialect.class );
testDetermination( "DB2/LINUX", DB2Dialect.class );
testDetermination( "DB2/6000", DB2Dialect.class );
testDetermination( "DB2/HPUX", DB2Dialect.class );
testDetermination( "DB2/SUN", DB2Dialect.class );
testDetermination( "DB2/LINUX390", DB2Dialect.class );
testDetermination( "DB2/AIX64", DB2Dialect.class );
testDetermination( "Oracle", 8, Oracle8iDialect.class );
testDetermination( "Oracle", 9, Oracle9iDialect.class );
testDetermination( "Oracle", 10, Oracle10gDialect.class );
testDetermination( "Oracle", 11, Oracle10gDialect.class );
}
public void testCustomDialects() {
DialectFactory.registerDialectResolver( TestingDialects.MyDialectResolver1.class.getName() );
DialectFactory.registerDialectResolver( TestingDialects.MyDialectResolver2.class.getName() );
DialectFactory.registerDialectResolver( TestingDialects.ErrorDialectResolver1.class.getName() );
DialectFactory.registerDialectResolver( TestingDialects.ErrorDialectResolver2.class.getName() );
DialectFactory.registerDialectResolver( TestingDialects.MyOverridingDialectResolver1.class.getName() );
DialectFactory.registerDialectResolver( "org.hibernate.dialect.NoSuchDialectResolver" );
DialectFactory.registerDialectResolver( "java.lang.Object" );
testDetermination( "MyDatabase1", TestingDialects.MyDialect1.class );
testDetermination( "MyDatabase2", 1, TestingDialects.MyDialect21.class );
testDetermination( "MyTrickyDatabase1", TestingDialects.MyDialect1.class );
// This should be mapped to DB2Dialect by default, but actually it will be
// my custom dialect because I have registered MyOverridingDialectResolver1.
testDetermination( "DB2/MySpecialPlatform", TestingDialects.MySpecialDB2Dialect.class );
try {
testDetermination( "ErrorDatabase1", Void.TYPE );
fail();
}
catch ( HibernateException e ) {
// log.info( "Expected SQL error in resolveDialect and ignored", e );
}
try {
testDetermination( "ErrorDatabase2", Void.TYPE );
fail();
}
catch ( HibernateException e ) {
// log.info( "Expected runtime error in resolveDialect", e );
}
}
public void testDialectNotFound() {
Properties properties = new Properties();
try {
DialectFactory.buildDialect( properties, Mocks.createConnection( "NoSuchDatabase", 666 ) );
fail();
}
catch ( HibernateException e ) {
assertNull( e.getCause() );
}
}
private void testDetermination(String databaseName, Class clazz) {
testDetermination( databaseName, -9999, clazz );
}
private void testDetermination(String databaseName, int databaseMajorVersion, Class clazz) {
Properties properties = new Properties();
Connection conn = Mocks.createConnection( databaseName, databaseMajorVersion );
assertEquals( clazz, DialectFactory.buildDialect( properties, conn ).getClass() );
}
}

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/*
* 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.SQLException;
import junit.framework.TestSuite;
import junit.framework.Test;
import junit.framework.TestCase;
import org.hibernate.dialect.Dialect;
import org.hibernate.dialect.TestingDialects;
import org.hibernate.dialect.Mocks;
import org.hibernate.exception.JDBCConnectionException;
/**
* TODO : javadoc
*
* @author Steve Ebersole
*/
public class DialectResolverTest extends TestCase {
public DialectResolverTest(String name) {
super( name );
}
public void testDialects() throws Exception {
DialectResolverSet resolvers = new DialectResolverSet();
resolvers.addResolverAtFirst( new TestingDialects.MyDialectResolver1() );
resolvers.addResolverAtFirst( new TestingDialects.MyDialectResolver2() );
testDetermination( resolvers, "MyDatabase1", 1, TestingDialects.MyDialect1.class );
testDetermination( resolvers, "MyDatabase1", 2, TestingDialects.MyDialect1.class );
testDetermination( resolvers, "MyDatabase2", 0, null );
testDetermination( resolvers, "MyDatabase2", 1, TestingDialects.MyDialect21.class );
testDetermination( resolvers, "MyDatabase2", 2, TestingDialects.MyDialect22.class );
testDetermination( resolvers, "MyDatabase2", 3, TestingDialects.MyDialect22.class );
testDetermination( resolvers, "MyDatabase3", 1, null );
testDetermination( resolvers, "MyTrickyDatabase1", 1, TestingDialects.MyDialect1.class );
}
public void testErrorAndOrder() throws Exception {
DialectResolverSet resolvers = new DialectResolverSet();
resolvers.addResolverAtFirst( new TestingDialects.MyDialectResolver1() );
resolvers.addResolver( new TestingDialects.ErrorDialectResolver1() );
resolvers.addResolverAtFirst( new TestingDialects.ErrorDialectResolver1() );
resolvers.addResolver( new TestingDialects.MyDialectResolver2() );
// Non-connection errors are suppressed.
testDetermination( resolvers, "MyDatabase1", 1, TestingDialects.MyDialect1.class );
testDetermination( resolvers, "MyTrickyDatabase1", 1, TestingDialects.MyDialect1.class );
testDetermination( resolvers, "NoSuchDatabase", 1, null );
// Connection errors are reported
try {
testDetermination( resolvers, "ConnectionErrorDatabase1", 1, null );
fail();
}
catch ( JDBCConnectionException e ) {
// expected
}
}
public void testBasicDialectResolver() throws Exception {
DialectResolverSet resolvers = new DialectResolverSet();
// Simulating MyDialectResolver1 by BasicDialectResolvers
resolvers.addResolver( new BasicDialectResolver( "MyDatabase1", TestingDialects.MyDialect1.class ) );
resolvers.addResolver( new BasicDialectResolver( "MyDatabase2", 1, TestingDialects.MyDialect21.class ) );
resolvers.addResolver( new BasicDialectResolver( "MyDatabase2", 2, TestingDialects.MyDialect22.class ) );
resolvers.addResolver( new BasicDialectResolver( "ErrorDatabase1", Object.class ) );
testDetermination( resolvers, "MyDatabase1", 1, TestingDialects.MyDialect1.class );
testDetermination( resolvers, "MyDatabase1", 2, TestingDialects.MyDialect1.class );
testDetermination( resolvers, "MyDatabase2", 0, null );
testDetermination( resolvers, "MyDatabase2", 1, TestingDialects.MyDialect21.class );
testDetermination( resolvers, "MyDatabase2", 2, TestingDialects.MyDialect22.class );
testDetermination( resolvers, "ErrorDatabase1", 0, null );
}
private void testDetermination(
DialectResolver resolver,
String databaseName,
int version,
Class dialectClass) throws SQLException {
Dialect dialect = resolver.resolveDialect( Mocks.createConnection( databaseName, version ).getMetaData() );
if ( dialectClass == null ) {
assertEquals( null, dialect );
}
else {
assertEquals( dialectClass, dialect.getClass() );
}
}
public static Test suite() {
return new TestSuite( DialectResolverTest.class );
}
}

33
core/src/test/resources/log4j.properties Normal file
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@ -0,0 +1,33 @@
#
# 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
#
#
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n
log4j.rootLogger=info, stdout
log4j.logger.org.hibernate.test=info
log4j.logger.org.hibernate.tool.hbm2ddl=debug