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Java > Open Source Codes > org > objectstyle > cayenne > dba > sqlserver > SQLServerAdapter


1 /* ====================================================================
2  *
3  * The ObjectStyle Group Software License, version 1.1
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56 package org.objectstyle.cayenne.dba.sqlserver;
57
58 import org.objectstyle.cayenne.access.DataNode;
59 import org.objectstyle.cayenne.access.trans.QualifierTranslator;
60 import org.objectstyle.cayenne.access.trans.QueryAssembler;
61 import org.objectstyle.cayenne.access.trans.TrimmingQualifierTranslator;
62 import org.objectstyle.cayenne.dba.sybase.SybaseAdapter;
63 import org.objectstyle.cayenne.map.DbAttribute;
64 import org.objectstyle.cayenne.query.Query;
65 import org.objectstyle.cayenne.query.SQLAction;
66
67 /**
68  * Cayenne DbAdapter implementation for <a
69  * HREF="http://www.microsoft.com/sql/default.asp"Microsoft SQL Server </a> engine.
70  * </p>
71  * <h3>Microsoft Driver Settings</h3>
72  * <p>
73  * Sample <a target="_top"
74  * HREF="../../../../../../../developerguide/unit-tests.html">connection settings </a> to
75  * use with MS SQL Server are shown below:
76  *
77  * <pre>
78  *
79  *
80  *
81  * sqlserver.cayenne.adapter = org.objectstyle.cayenne.dba.sqlserver.SQLServerAdapter
82  * sqlserver.jdbc.username = test
83  * sqlserver.jdbc.password = secret
84  * sqlserver.jdbc.url = jdbc:microsoft:sqlserver://192.168.0.65;databaseName=cayenne;SelectMethod=cursor
85  * sqlserver.jdbc.driver = com.microsoft.jdbc.sqlserver.SQLServerDriver
86  * </pre>
87  *
88  * <p>
89  * <i>Note on case-sensitive LIKE: if your application requires case-sensitive LIKE
90  * support, ask your DBA to configure the database to use a case-senstitive collation (one
91  * with "CS" in symbolic collation name instead of "CI", e.g.
92  * "SQL_Latin1_general_CP1_CS_AS"). </i>
93  * </p>
94  * <h3>jTDS Driver Settings</h3>
95  * <p>
96  * jTDS is an open source driver that can be downloaded from <a HREF=
97  * "http://jtds.sourceforge.net">http://jtds.sourceforge.net </a>. It supports both
98  * SQLServer and Sybase. Sample SQLServer settings are the following:
99  * </p>
100  *
101  * <pre>
102  *
103  *
104  *
105  * sqlserver.cayenne.adapter = org.objectstyle.cayenne.dba.sqlserver.SQLServerAdapter
106  * sqlserver.jdbc.username = test
107  * sqlserver.jdbc.password = secret
108  * sqlserver.jdbc.url = jdbc:jtds:sqlserver://192.168.0.65/cayenne
109  * sqlserver.jdbc.driver = net.sourceforge.jtds.jdbc.Driver
110  *
111  *
112  *
113  * </pre>
114  *
115  * @author Andrei Adamchik
116  * @since 1.1
117  */
118 public class SQLServerAdapter extends SybaseAdapter {
119
120     public static final String JavaDoc TRIM_FUNCTION = "RTRIM";
121
122     public SQLServerAdapter() {
123         // TODO: i wonder if Sybase supports generated keys...
124 // in this case we need to move this to the super.
125 this.setSupportsGeneratedKeys(true);
126     }
127     
128
129     /**
130      * Uses SQLServerActionBuilder to create the right action.
131      *
132      * @since 1.2
133      */
134     public SQLAction getAction(Query query, DataNode node) {
135         return query.createSQLAction(new SQLServerActionBuilder(this, node.getEntityResolver()));
136     }
137
138     
139     /**
140      * Returns a trimming translator.
141      */
142     public QualifierTranslator getQualifierTranslator(QueryAssembler queryAssembler) {
143         return new TrimmingQualifierTranslator(
144                 queryAssembler,
145                 SQLServerAdapter.TRIM_FUNCTION);
146     }
147
148     
149     /**
150      * Overrides super implementation to correctly set up identity columns.
151      *
152      * @since 1.2
153      */
154     protected void createTableAppendColumn(StringBuffer JavaDoc sqlBuffer, DbAttribute column) {
155         super.createTableAppendColumn(sqlBuffer, column);
156         
157         if(column.isGenerated()) {
158             // current limitation - we don't allow to set identity parameters...
159 sqlBuffer.append(" IDENTITY (1, 1)");
160         }
161     }
162 }
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