/*
* Copyright 2002-2007 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.jdbc.core.metadata;
import java.sql.DatabaseMetaData;
import java.sql.SQLException;
import javax.sql.DataSource;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.dao.DataAccessResourceFailureException;
import org.springframework.jdbc.support.DatabaseMetaDataCallback;
import org.springframework.jdbc.support.JdbcUtils;
import org.springframework.jdbc.support.MetaDataAccessException;
/**
* Factory used to create a {@link TableMetaDataProvider} implementation based on the type of databse being used.
*
* @author Thomas Risberg
* @since 2.5
*/
public class TableMetaDataProviderFactory {
/** Logger */
private static final Log logger = LogFactory.getLog(TableMetaDataProviderFactory.class);
/**
* Create a TableMetaDataProvider based on the database metedata
* @param dataSource used to retrieve metedata
* @param context the class that holds configuration and metedata
* @return instance of the TableMetaDataProvider implementation to be used
*/
static public TableMetaDataProvider createMetaDataProvider(DataSource dataSource,
final TableMetaDataContext context) {
try {
return (TableMetaDataProvider) JdbcUtils.extractDatabaseMetaData(
dataSource, new DatabaseMetaDataCallback() {
public Object processMetaData(DatabaseMetaData databaseMetaData)
throws SQLException, MetaDataAccessException {
String databaseProductName =
JdbcUtils.commonDatabaseName(databaseMetaData.getDatabaseProductName());
boolean accessTableColumnMetaData = context.isAccessTableColumnMetaData();
TableMetaDataProvider provider;
if ("Oracle".equals(databaseProductName)) {
provider = new OracleTableMetaDataProvider(databaseMetaData,
context.isOverrideIncludeSynonymsDefault());
}
else if ("HSQL Database Engine".equals(databaseProductName)) {
provider = new HsqlTableMetaDataProvider(databaseMetaData);
}
else if ("PostgreSQL".equals(databaseProductName)) {
provider = new PostgresTableMetaDataProvider(databaseMetaData);
}
else if ("Apache Derby".equals(databaseProductName)) {
provider = new DerbyTableMetaDataProvider(databaseMetaData);
}
else {
provider = new GenericTableMetaDataProvider(databaseMetaData);
}
if (logger.isDebugEnabled()) {
logger.debug("Using " + provider.getClass().getName());
}
provider.initializeWithMetaData(databaseMetaData);
if (accessTableColumnMetaData) {
provider.initializeWithTableColumnMetaData(databaseMetaData, context.getCatalogName(),
context.getSchemaName(), context.getTableName());
}
return provider;
}
});
} catch (MetaDataAccessException e) {
throw new DataAccessResourceFailureException("Error retreiving database metadata", e);
}
}
}