| /* |
| * Copyright 1999,2004 The Apache Software Foundation. |
| * |
| * 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.log4j.db.dialect; |
| |
| import org.apache.log4j.db.ConnectionSource; |
| import org.apache.log4j.spi.ComponentBase; |
| |
| import java.sql.DatabaseMetaData; |
| import java.sql.SQLException; |
| |
| |
| /** |
| * |
| * @author Ceki Gulcu |
| * |
| */ |
| public class Util extends ComponentBase { |
| private static final String POSTGRES_PART = "postgresql"; |
| private static final String MYSQL_PART = "mysql"; |
| private static final String ORACLE_PART = "oracle"; |
| //private static final String MSSQL_PART = "mssqlserver4"; |
| private static final String MSSQL_PART = "microsoft"; |
| private static final String HSQL_PART = "hsql"; |
| |
| public static int discoverSQLDialect(DatabaseMetaData meta) { |
| int dialectCode = 0; |
| |
| try { |
| |
| String dbName = meta.getDatabaseProductName().toLowerCase(); |
| |
| if (dbName.indexOf(POSTGRES_PART) != -1) { |
| return ConnectionSource.POSTGRES_DIALECT; |
| } else if (dbName.indexOf(MYSQL_PART) != -1) { |
| return ConnectionSource.MYSQL_DIALECT; |
| } else if (dbName.indexOf(ORACLE_PART) != -1) { |
| return ConnectionSource.ORACLE_DIALECT; |
| } else if (dbName.indexOf(MSSQL_PART) != -1) { |
| return ConnectionSource.MSSQL_DIALECT; |
| } else if (dbName.indexOf(HSQL_PART) != -1) { |
| return ConnectionSource.HSQL_DIALECT; |
| } else { |
| return ConnectionSource.UNKNOWN_DIALECT; |
| } |
| } catch (SQLException sqle) { |
| // we can't do much here |
| } |
| |
| return dialectCode; |
| } |
| |
| public static SQLDialect getDialectFromCode(int dialectCode) { |
| SQLDialect sqlDialect = null; |
| |
| switch (dialectCode) { |
| case ConnectionSource.POSTGRES_DIALECT: |
| sqlDialect = new PostgreSQLDialect(); |
| |
| break; |
| case ConnectionSource.MYSQL_DIALECT: |
| sqlDialect = new MySQLDialect(); |
| |
| break; |
| case ConnectionSource.ORACLE_DIALECT: |
| sqlDialect = new OracleDialect(); |
| |
| break; |
| case ConnectionSource.MSSQL_DIALECT: |
| sqlDialect = new MsSQLDialect(); |
| |
| break; |
| case ConnectionSource.HSQL_DIALECT: |
| sqlDialect = new HSQLDBDialect(); |
| |
| break; |
| } |
| return sqlDialect; |
| } |
| |
| /** |
| * This method handles cases where the |
| * {@link DatabaseMetaData#supportsGetGeneratedKeys} method is missing in the |
| * JDBC driver implementation. |
| */ |
| public boolean supportsGetGeneratedKeys(DatabaseMetaData meta) { |
| try { |
| return meta.supportsGetGeneratedKeys(); |
| } catch(Throwable e) { |
| getLogger().warn("The following warning is only informative."); |
| getLogger().warn("Could not call supportsGetGeneratedKeys method. This may be recoverable"); |
| return false; |
| } |
| } |
| |
| /** |
| * This method handles cases where the |
| * {@link DatabaseMetaData#supportsBatchUpdates} method is missing in the |
| * JDBC driver implementation. |
| */ |
| public boolean supportsBatchUpdates(DatabaseMetaData meta) { |
| try { |
| return meta.supportsBatchUpdates(); |
| } catch(Throwable e) { |
| getLogger().warn("Missing DatabaseMetaData.supportsBatchUpdates method."); |
| return false; |
| } |
| } |
| } |