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/*
 *  Copyright 2008 biaoping.yin
 *
 *  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 com.frameworkset.common.poolman;

import java.io.Serializable;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.Date;

import com.frameworkset.common.poolman.util.SQLManager;

/**
 *
 * 

Title: DBAdapter

* *

Description: 消除数据之间的差异性

* *

Copyright: Copyright (c) 2005

* *

Company:

* * @author biaoping.yin * @version 1.0 */ public class DBAdapter implements Serializable{ /********************************************* * Method following are inheritate from * * com.frameworkset.orm.adapter.DB * *********************************************/ public static final String toUpperCase(String in) { return SQLManager.getInstance().getDBAdapter().toUpperCase(in); } public static final String getIDMethodType(String dbName) { return SQLManager.getInstance().getDBAdapter(dbName).getIDMethodType(); } public static final String getIDMethodSQL(Object obj,String dbName) { return SQLManager.getInstance().getDBAdapter(dbName).getIDMethodSQL(obj); } public static final void lockTable(Connection con, String table,String dbName) throws SQLException { SQLManager.getInstance().getDBAdapter(dbName).lockTable(con,table); } public static final void unlockTable(Connection con, String table,String dbName) throws SQLException { SQLManager.getInstance().getDBAdapter(dbName).unlockTable(con,table); } public static final String ignoreCase(String in,String dbName) { return SQLManager.getInstance().getDBAdapter(dbName).ignoreCase(in); } /** * This method is used to ignore case in an ORDER BY clause. * Usually it is the same as ignoreCase, but some databases * (Interbase for example) does not use the same SQL in ORDER BY * and other clauses. * * @param in The string whose case to ignore. * @return The string in a case that can be ignored. */ public static final String ignoreCaseInOrderBy(String in,String dbName) { return SQLManager.getInstance().getDBAdapter(dbName).ignoreCaseInOrderBy(in); } /** * This method is used to check whether the database natively * supports limiting the size of the resultset. * * @return True if the database natively supports limiting the * size of the resultset. */ public static final boolean supportsNativeLimit(String dbName) { return SQLManager.getInstance().getDBAdapter(dbName).supportsNativeLimit(); } /** * This method is used to check whether the database natively * supports returning results starting at an offset position other * than 0. * * @return True if the database natively supports returning * results starting at an offset position other than 0. */ public static final boolean supportsNativeOffset(String dbName) { return SQLManager.getInstance().getDBAdapter(dbName).supportsNativeOffset(); } /** * This method is for the SqlExpression.quoteAndEscape rules. The rule is, * any string in a SqlExpression with a BACKSLASH will either be changed to * "\\" or left as "\". SapDB does not need the escape character. * * @return true if the database needs to escape text in SqlExpressions. */ public static final boolean escapeText(String dbName) { return SQLManager.getInstance().getDBAdapter(dbName).escapeText(); } /** * This method is used to check whether the database supports * limiting the size of the resultset. * * @return The limit style for the database. */ public static final int getLimitStyle(String dbName) { return SQLManager.getInstance().getDBAdapter(dbName).getLimitStyle(); } /** * This method is used to format any date string. * Database can use different default date formats. * * @param date the Date to format * @return The proper date formatted String. */ public static final String getDateString(Date date,String dbName) { return SQLManager.getInstance().getDBAdapter(dbName).getDateString(date); } /** * This method is used to format a boolean string. * * @param b the Boolean to format * @return The proper date formatted String. */ public static final String getBooleanString(Boolean b,String dbName) { return SQLManager.getInstance().getDBAdapter(dbName).getBooleanString(b); } /** * Returns the character used to indicate the beginning and end of * a piece of text used in a SQL statement (generally a single * quote). * * @return The text delimeter. */ public static final char getStringDelimiter(String dbName) { return SQLManager.getInstance().getDBAdapter(dbName).getStringDelimiter(); } public static final String toUpperCase(String in,String dbName) { return SQLManager.getInstance().getDBAdapter(dbName).toUpperCase(in); } public static final String getIDMethodType() { return SQLManager.getInstance().getDBAdapter().getIDMethodType(); } public static final String getIDMethodSQL(Object obj) { return SQLManager.getInstance().getDBAdapter().getIDMethodSQL(obj); } public static final void lockTable(Connection con, String table) throws SQLException { SQLManager.getInstance().getDBAdapter().lockTable(con,table); } public static final void unlockTable(Connection con, String table) throws SQLException { SQLManager.getInstance().getDBAdapter().unlockTable(con,table); } public static final String ignoreCase(String in) { return SQLManager.getInstance().getDBAdapter().ignoreCase(in); } /** * This method is used to ignore case in an ORDER BY clause. * Usually it is the same as ignoreCase, but some databases * (Interbase for example) does not use the same SQL in ORDER BY * and other clauses. * * @param in The string whose case to ignore. * @return The string in a case that can be ignored. */ public static final String ignoreCaseInOrderBy(String in) { return SQLManager.getInstance().getDBAdapter().ignoreCaseInOrderBy(in); } /** * This method is used to check whether the database natively * supports limiting the size of the resultset. * * @return True if the database natively supports limiting the * size of the resultset. */ public static final boolean supportsNativeLimit() { return SQLManager.getInstance().getDBAdapter().supportsNativeLimit(); } /** * This method is used to check whether the database natively * supports returning results starting at an offset position other * than 0. * * @return True if the database natively supports returning * results starting at an offset position other than 0. */ public static final boolean supportsNativeOffset() { return SQLManager.getInstance().getDBAdapter().supportsNativeOffset(); } /** * This method is for the SqlExpression.quoteAndEscape rules. The rule is, * any string in a SqlExpression with a BACKSLASH will either be changed to * "\\" or left as "\". SapDB does not need the escape character. * * @return true if the database needs to escape text in SqlExpressions. */ public static final boolean escapeText() { return SQLManager.getInstance().getDBAdapter().escapeText(); } /** * This method is used to check whether the database supports * limiting the size of the resultset. * * @return The limit style for the database. */ public static final int getLimitStyle() { return SQLManager.getInstance().getDBAdapter().getLimitStyle(); } /** * This method is used to format any date string. * Database can use different default date formats. * * @param date the Date to format * @return The proper date formatted String. */ public static final String getDateString(Date date) { return SQLManager.getInstance().getDBAdapter().getDateString(date); } /** * This method is used to format a boolean string. * * @param b the Boolean to format * @return The proper date formatted String. */ public static final String getBooleanString(Boolean b) { return SQLManager.getInstance().getDBAdapter().getBooleanString(b); } /** * Returns the character used to indicate the beginning and end of * a piece of text used in a SQL statement (generally a single * quote). * * @return The text delimeter. */ public static final char getStringDelimiter() { return SQLManager.getInstance().getDBAdapter().getStringDelimiter(); } }




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