Coverage report

  %line %branch
org.apache.torque.adapter.DBSybase
0% 
0% 

 1  
 package org.apache.torque.adapter;
 2  
 
 3  
 /*
 4  
  * Licensed to the Apache Software Foundation (ASF) under one
 5  
  * or more contributor license agreements.  See the NOTICE file
 6  
  * distributed with this work for additional information
 7  
  * regarding copyright ownership.  The ASF licenses this file
 8  
  * to you under the Apache License, Version 2.0 (the
 9  
  * "License"); you may not use this file except in compliance
 10  
  * with the License.  You may obtain a copy of the License at
 11  
  *
 12  
  *   http://www.apache.org/licenses/LICENSE-2.0
 13  
  *
 14  
  * Unless required by applicable law or agreed to in writing,
 15  
  * software distributed under the License is distributed on an
 16  
  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 17  
  * KIND, either express or implied.  See the License for the
 18  
  * specific language governing permissions and limitations
 19  
  * under the License.
 20  
  */
 21  
 
 22  
 import java.sql.Connection;
 23  
 import java.sql.SQLException;
 24  
 import java.sql.Statement;
 25  
 import java.text.SimpleDateFormat;
 26  
 import java.util.Date;
 27  
 
 28  
 import org.apache.torque.TorqueException;
 29  
 import org.apache.torque.util.Criteria;
 30  
 import org.apache.torque.util.Query;
 31  
 import org.apache.torque.util.SqlExpression;
 32  
 
 33  
 /**
 34  
  * This is used to connect to a Sybase database using Sybase's
 35  
  * JConnect JDBC driver.
 36  
  *
 37  
  * <B>NOTE:</B><I>Currently JConnect does not implement the required
 38  
  * methods for ResultSetMetaData, and therefore the village API's may
 39  
  * not function.  For connection pooling, everything works.</I>
 40  
  *
 41  
  * @author <a href="mailto:ekkerbj@netscape.net">Jeff Brekke</a>
 42  
  * @version $Id: DBSybase.java 476490 2006-11-18 11:38:04Z tfischer $
 43  
  */
 44  
 public class DBSybase extends AbstractDBAdapter
 45  
 {
 46  
     /**
 47  
      * Serial version
 48  
      */
 49  
     private static final long serialVersionUID = 4782996646843056810L;
 50  
 
 51  
     /** date format */
 52  
     private static final String DATE_FORMAT = "yyyyMMdd HH:mm:ss";
 53  
 
 54  
     /**
 55  
      * Empty constructor.
 56  
      */
 57  
     protected DBSybase()
 58  0
     {
 59  0
     }
 60  
 
 61  
     /**
 62  
      * This method is used to ignore case.
 63  
      *
 64  
      * @param in The string to transform to upper case.
 65  
      * @return The upper case string.
 66  
      */
 67  
     public String toUpperCase(String in)
 68  
     {
 69  0
         return new StringBuffer("UPPER(").append(in).append(")").toString();
 70  
     }
 71  
 
 72  
     /**
 73  
      * This method is used to ignore case.
 74  
      *
 75  
      * @param in The string whose case to ignore.
 76  
      * @return The string in a case that can be ignored.
 77  
      */
 78  
     public String ignoreCase(String in)
 79  
     {
 80  0
         return new StringBuffer("UPPER(").append(in).append(")").toString();
 81  
     }
 82  
 
 83  
     /**
 84  
      * @see org.apache.torque.adapter.DB#getIDMethodType()
 85  
      */
 86  
     public String getIDMethodType()
 87  
     {
 88  0
         return AUTO_INCREMENT;
 89  
     }
 90  
 
 91  
     /**
 92  
      * Returns the last value from an identity column (available on a
 93  
      * per-session basis from the global variable
 94  
      * <code>@@identity</code>).
 95  
      *
 96  
      * @see org.apache.torque.adapter.DB#getIDMethodSQL(Object obj)
 97  
      */
 98  
     public String getIDMethodSQL(Object unused)
 99  
     {
 100  0
         return "select @@identity";
 101  
     }
 102  
 
 103  
     /**
 104  
      * Locks the specified table.
 105  
      *
 106  
      * @param con The JDBC connection to use.
 107  
      * @param table The name of the table to lock.
 108  
      * @throws SQLException No Statement could be created or executed.
 109  
      */
 110  
     public void lockTable(Connection con, String table) throws SQLException
 111  
     {
 112  0
         Statement statement = con.createStatement();
 113  
 
 114  0
         StringBuffer stmt = new StringBuffer();
 115  0
         stmt.append("SELECT next_id FROM ")
 116  
         .append(table)
 117  
         .append(" FOR UPDATE");
 118  
 
 119  0
         statement.executeQuery(stmt.toString());
 120  0
     }
 121  
 
 122  
     /**
 123  
      * Unlocks the specified table.
 124  
      *
 125  
      * @param con The JDBC connection to use.
 126  
      * @param table The name of the table to unlock.
 127  
      * @throws SQLException No Statement could be created or executed.
 128  
      */
 129  
     public void unlockTable(Connection con, String table) throws SQLException
 130  
     {
 131  
         // Tables in Sybase are unlocked when a commit is issued.  The
 132  
         // user may have issued a commit but do it here to be sure.
 133  0
         con.commit();
 134  0
     }
 135  
 
 136  
     /**
 137  
      * This method is used to chek whether the database supports
 138  
      * limiting the size of the resultset.
 139  
      *
 140  
      * @return LIMIT_STYLE_SYBASE.
 141  
      * @deprecated This should not be exposed to the outside
 142  
      */
 143  
     public int getLimitStyle()
 144  
     {
 145  0
         return DB.LIMIT_STYLE_SYBASE;
 146  
     }
 147  
 
 148  
     /**
 149  
      * Return true for Sybase
 150  
      * @see org.apache.torque.adapter.AbstractDBAdapter#supportsNativeLimit()
 151  
      */
 152  
     public boolean supportsNativeLimit()
 153  
     {
 154  0
         return true;
 155  
     }
 156  
 
 157  
     /**
 158  
      * Modify a query to add limit and offset values for Sybase.
 159  
      *
 160  
      * @param query The query to modify
 161  
      * @param offset the offset Value
 162  
      * @param limit the limit Value
 163  
      *
 164  
      * @throws TorqueException if any error occurs when building the query
 165  
      */
 166  
     public void generateLimits(Query query, int offset, class="keyword">int limit)
 167  
         throws TorqueException
 168  
     {
 169  0
         if (limit + offset > 0)
 170  
         {
 171  0
             query.setRowcount(String.valueOf(limit + offset));
 172  0
         }
 173  0
         else if (limit + offset == 0)
 174  
         {
 175  
             // This is necessary to create the empty result set that Torque expects
 176  0
             query.getWhereClause().add(SqlExpression.build("1", new Integer(0), Criteria.EQUAL));
 177  
         }
 178  0
     }
 179  
 
 180  
     /**
 181  
      * This method overrides the JDBC escapes used to format dates
 182  
      * using a <code>DateFormat</code>.  As of version 11, the Sybase
 183  
      * JDBC driver does not implement JDBC 3.0 escapes.
 184  
      *
 185  
      * @param date the date to format
 186  
      * @return The properly formatted date String.
 187  
      */
 188  
     public String getDateString(Date date)
 189  
     {
 190  0
         char delim = getStringDelimiter();
 191  0
         return (delim + new SimpleDateFormat(DATE_FORMAT).format(date) + delim);
 192  
     }
 193  
 
 194  
     /**
 195  
      * Determines whether backslashes (\) should be escaped in explicit SQL
 196  
      * strings. If true is returned, a BACKSLASH will be changed to "\\".
 197  
      * If false is returned, a BACKSLASH will be left as "\".
 198  
      *
 199  
      * Sybase (and MSSQL) doesn't define a default escape character,
 200  
      * so false is returned.
 201  
      *
 202  
      * @return false
 203  
      * @see org.apache.torque.adapter.DB#escapeText()
 204  
      */
 205  
     public boolean escapeText()
 206  
     {
 207  0
         return false;
 208  
     }
 209  
 
 210  
     /**
 211  
      * Whether an escape clause in like should be used.
 212  
      * Example : select * from AUTHOR where AUTHOR.NAME like '\_%' ESCAPE '\';
 213  
      *
 214  
      * Sybase needs this, so this implementation always returns
 215  
      * <code>true</code>.
 216  
      *
 217  
      * @return whether the escape clause should be appended or not.
 218  
      */
 219  
     public boolean useEscapeClauseForLike()
 220  
     {
 221  0
         return true;
 222  
     }
 223  
 }

This report is generated by jcoverage, Maven and Maven JCoverage Plugin.