KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > org > apache > ojb > broker > platforms > PlatformMsSQLServerImpl


1 package org.apache.ojb.broker.platforms;
2
3 /* Copyright 2002-2005 The Apache Software Foundation
4  *
5  * Licensed under the Apache License, Version 2.0 (the "License");
6  * you may not use this file except in compliance with the License.
7  * You may obtain a copy of the License at
8  *
9  * http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  */
17
18 import java.sql.CallableStatement JavaDoc;
19 import java.sql.Connection JavaDoc;
20 import java.sql.Types JavaDoc;
21 import java.sql.SQLException JavaDoc;
22
23 /**
24  * This class extends <code>PlatformDefaultImpl</code> and defines specific behavior for the
25  * Microsoft SQL Server platform.
26  *
27  * @version $Id: PlatformMsSQLServerImpl.java,v 1.8.2.3 2005/12/21 22:26:40 tomdz Exp $
28  */
29 public class PlatformMsSQLServerImpl extends PlatformDefaultImpl
30 {
31     /**
32      * Get join syntax type for this RDBMS - one on of the constants from JoinSyntaxType interface
33      * MBAIRD: MS SQL Server 2000 actually supports both types, but due to a problem with the sql
34      * generator, we opt to have no parens.
35      */
36     public byte getJoinSyntaxType()
37     {
38         return SQL92_NOPAREN_JOIN_SYNTAX;
39     }
40
41     public CallableStatement JavaDoc prepareNextValProcedureStatement(Connection JavaDoc con, String JavaDoc procedureName,
42             String JavaDoc sequenceName) throws PlatformException
43     {
44         try
45         {
46             String JavaDoc sp = "{?= call " + procedureName + " (?)}";
47             CallableStatement JavaDoc cs = con.prepareCall(sp);
48             cs.registerOutParameter(1, Types.INTEGER);
49             cs.setString(2, sequenceName);
50             return cs;
51         }
52         catch (SQLException JavaDoc e)
53         {
54             throw new PlatformException(e);
55         }
56     }
57
58     public String JavaDoc getLastInsertIdentityQuery(String JavaDoc tableName)
59     {
60         /*
61         More info about the used identity-query see JIRA OJB-77
62         http://issues.apache.org/jira/browse/OJB-77
63
64         As suggested in OJB-77 the latest recommendation from MS was to
65         use function "SELECT SCOPE_IDENTITY()" to get the latest generated identity
66         for the current session and scope:
67         "SCOPE_IDENTITY and @@IDENTITY will return last identity values generated in
68         any table in the current session. However, SCOPE_IDENTITY returns values
69         inserted only within the current scope; @@IDENTITY is not limited to a
70         specific scope."
71         */
72         return "SELECT SCOPE_IDENTITY()";
73     }
74
75     /**
76      * Answer the Character for Concatenation
77      */
78     protected String JavaDoc getConcatenationCharacter()
79     {
80         return "+";
81     }
82
83 }
84
Popular Tags