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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.orm.adapter;
/*
*
* 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.
*/
import java.sql.Connection;
import java.sql.SQLException;
import java.sql.Statement;
import com.frameworkset.orm.platform.PlatformSapdbImpl;
/**
* This is used to connect to SapDB databases.
*
* http://www.sapdb.org
*
* @author Dave Polito
* @version $Id: DBSapDB.java,v 1.9 2005/01/31 19:43:55 tfischer Exp $
*/
public class DBSapDB extends DB
{
/**
* Empty constructor.
*/
protected DBSapDB()
{
this.platform = new PlatformSapdbImpl();
}
/**
* This method is used to ignore case.
*
* @param in The string to transform to upper case.
* @return The upper case string.
*/
public String toUpperCase(String in)
{
return new StringBuilder("UPPER(").append(in).append(")").toString();
}
/**
* This method is used to ignore case.
*
* @param in The string whose case to ignore.
* @return The string in a case that can be ignored.
*/
public String ignoreCase(String in)
{
return new StringBuilder("UPPER(").append(in).append(")").toString();
}
/**
* @see com.frameworkset.orm.adapter.DB#getIDMethodType()
*/
public String getIDMethodType()
{
return SEQUENCE;
}
/**
* Returns the next key from a sequence. Uses the following
* implementation:
*
*
* select sequenceName.nextval from dual
*
*
* @param sequenceName The name of the sequence (should be of type
* String
).
* @return SQL to retreive the next database key.
* @see com.frameworkset.orm.adapter.DB#getIDMethodSQL(Object)
*/
public String getIDMethodSQL(Object sequenceName)
{
return ("select " + sequenceName + ".nextval from dual");
}
/**
* Locks the specified table.
*
* @param con The JDBC connection to use.
* @param table The name of the table to lock.
* @exception SQLException No Statement could be created or executed.
*/
public void lockTable(Connection con, String table) throws SQLException
{
Statement statement = con.createStatement();
StringBuilder stmt = new StringBuilder();
stmt.append("SELECT next_id FROM ")
.append(table)
.append(" FOR UPDATE");
statement.executeQuery(stmt.toString());
}
/**
* 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 false.
*/
public boolean escapeText()
{
return false;
}
/**
* Unlocks the specified table.
*
* @param con The JDBC connection to use.
* @param table The name of the table to unlock.
* @exception SQLException No Statement could be created or
* executed.
*/
public void unlockTable(Connection con, String table) throws SQLException
{
// Tables in SapDB are unlocked when a commit is issued. The
// user may have issued a commit but do it here to be sure.
con.commit();
}
}
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