~~~ /** * Copyright 2009-2019 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.apache.ibatis.mapping; import java.sql.Connection; import java.sql.DatabaseMetaData; import java.sql.SQLException; import java.util.Map; import java.util.Properties; import javax.sql.DataSource; import org.apache.ibatis.logging.Log; import org.apache.ibatis.logging.LogFactory; /** * Vendor DatabaseId provider. * * It returns database product name as a databaseId. * If the user provides a properties it uses it to translate database product name * key="Microsoft SQL Server", value="ms" will return "ms". * It can return null, if no database product name or * a properties was specified and no translation was found. * * @author Eduardo Macarron */ public class VendorDatabaseIdProvider implements DatabaseIdProvider { private Properties properties; @Override public String getDatabaseId(DataSource dataSource) { if (dataSource == null) { throw new NullPointerException("dataSource cannot be null"); } try { return getDatabaseName(dataSource); } catch (Exception e) { LogHolder.log.error("Could not get a databaseId from dataSource", e); } return null; } @Override public void setProperties(Properties p) { this.properties = p; } private String getDatabaseName(DataSource dataSource) throws SQLException { String productName = getDatabaseProductName(dataSource); if (this.properties != null) { for (Map.Entry<Object, Object> property : properties.entrySet()) { if (productName.contains((String) property.getKey())) { return (String) property.getValue(); } } // no match, return null return null; } return productName; } private String getDatabaseProductName(DataSource dataSource) throws SQLException { try (Connection con = dataSource.getConnection()) { DatabaseMetaData metaData = con.getMetaData(); return metaData.getDatabaseProductName(); } } private static class LogHolder { private static final Log log = LogFactory.getLog(VendorDatabaseIdProvider.class); } } ~~~