Coverage report

  %line %branch
org.apache.torque.adapter.DBPostgres
10% 
93% 

 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.text.DateFormat;
 25  
 import java.text.SimpleDateFormat;
 26  
 import java.util.Date;
 27  
 
 28  
 import org.apache.torque.util.Query;
 29  
 
 30  
 /**
 31  
  * This is used to connect to PostgresQL databases.
 32  
  *
 33  
  * <a href="http://www.postgresql.org/">http://www.postgresql.org/</a>
 34  
  *
 35  
  * @author <a href="mailto:hakan42@gmx.de">Hakan Tandogan</a>
 36  
  * @author <a href="mailto:hps@intermeta.de">Henning P. Schmiedehausen</a>
 37  
  * @version $Id: DBPostgres.java 522044 2007-03-24 16:00:57Z tfischer $
 38  
  */
 39  
 public class DBPostgres extends AbstractDBAdapter
 40  
 {
 41  
     /**
 42  
      * Serial version
 43  
      */
 44  
     private static final long serialVersionUID = 7643304924262475272L;
 45  
 
 46  
     /** A specialized date format for PostgreSQL. */
 47  
     private static final String DATE_FORMAT = "yyyy-MM-dd HH:mm:ss";
 48  
 
 49  
     /**
 50  
      * Empty constructor.
 51  
      */
 52  
     protected DBPostgres()
 53  6
     {
 54  6
     }
 55  
 
 56  
     /**
 57  
      * This method is used to ignore case.
 58  
      *
 59  
      * @param in The string to transform to upper case.
 60  
      * @return The upper case string.
 61  
      */
 62  
     public String toUpperCase(String in)
 63  
     {
 64  0
         String s = new StringBuffer("UPPER(").append(in).append(")").toString();
 65  0
         return s;
 66  
     }
 67  
 
 68  
     /**
 69  
      * This method is used to ignore case.
 70  
      *
 71  
      * @param in The string whose case to ignore.
 72  
      * @return The string in a case that can be ignored.
 73  
      */
 74  
     public String ignoreCase(String in)
 75  
     {
 76  0
         String s = new StringBuffer("UPPER(").append(in).append(")").toString();
 77  0
         return s;
 78  
     }
 79  
 
 80  
     /**
 81  
      * @see org.apache.torque.adapter.DB#getIDMethodType()
 82  
      */
 83  
     public String getIDMethodType()
 84  
     {
 85  0
         return SEQUENCE;
 86  
     }
 87  
 
 88  
     /**
 89  
      * @param name The name of the field (should be of type
 90  
      *      <code>String</code>).
 91  
      * @return SQL to retreive the next database key.
 92  
      * @see org.apache.torque.adapter.DB#getIDMethodSQL(Object)
 93  
      */
 94  
     public String getIDMethodSQL(Object name)
 95  
     {
 96  0
         return ("select nextval('" + name + "')");
 97  
     }
 98  
 
 99  
     /**
 100  
      * Locks the specified table.
 101  
      *
 102  
      * @param con The JDBC connection to use.
 103  
      * @param table The name of the table to lock.
 104  
      * @exception SQLException No Statement could be created or executed.
 105  
      */
 106  
     public void lockTable(Connection con, String table) throws SQLException
 107  
     {
 108  0
     }
 109  
 
 110  
     /**
 111  
      * Unlocks the specified table.
 112  
      *
 113  
      * @param con The JDBC connection to use.
 114  
      * @param table The name of the table to unlock.
 115  
      * @exception SQLException No Statement could be created or executed.
 116  
      */
 117  
     public void unlockTable(Connection con, String table) throws SQLException
 118  
     {
 119  0
     }
 120  
 
 121  
     /**
 122  
      * This method is used to chek whether the database supports
 123  
      * limiting the size of the resultset.
 124  
      *
 125  
      * @return LIMIT_STYLE_POSTGRES.
 126  
      * @deprecated This should not be exposed to the outside
 127  
      */
 128  
     public int getLimitStyle()
 129  
     {
 130  0
         return DB.LIMIT_STYLE_POSTGRES;
 131  
     }
 132  
 
 133  
     /**
 134  
      * Return true for PostgreSQL
 135  
      * @see org.apache.torque.adapter.AbstractDBAdapter#supportsNativeLimit()
 136  
      */
 137  
     public boolean supportsNativeLimit()
 138  
     {
 139  0
         return true;
 140  
     }
 141  
 
 142  
     /**
 143  
      * Return true for PostgreSQL
 144  
      * @see org.apache.torque.adapter.AbstractDBAdapter#supportsNativeOffset()
 145  
      */
 146  
     public boolean supportsNativeOffset()
 147  
     {
 148  0
         return true;
 149  
     }
 150  
 
 151  
     /**
 152  
      * Generate a LIMIT limit OFFSET offset clause if offset &gt; 0
 153  
      * or an LIMIT limit clause if limit is &gt; 0 and offset
 154  
      * is 0.
 155  
      *
 156  
      * @param query The query to modify
 157  
      * @param offset the offset Value
 158  
      * @param limit the limit Value
 159  
      */
 160  
     public void generateLimits(Query query, int offset, class="keyword">int limit)
 161  
     {
 162  0
         if (offset > 0)
 163  
         {
 164  0
             query.setOffset(Integer.toString(offset));
 165  
         }
 166  0
         if (limit >= 0)
 167  
         {
 168  0
             query.setLimit(Integer.toString(limit));
 169  
         }
 170  
 
 171  0
         query.setPreLimit(null);
 172  0
         query.setPostLimit(null);
 173  0
     }
 174  
 
 175  
     /**
 176  
      * Override the default behavior to associate b with null?
 177  
      *
 178  
      * @see DB#getBooleanString(Boolean)
 179  
      */
 180  
     public String getBooleanString(Boolean b)
 181  
     {
 182  6
         return (b == null) ? "FALSE" : (Boolean.TRUE.equals(b) ? "TRUE" : "FALSE");
 183  
     }
 184  
 
 185  
     /**
 186  
      * This method overrides the JDBC escapes used to format dates
 187  
      * using a <code>DateFormat</code>.
 188  
      *
 189  
      * This generates the timedate format defined in
 190  
      * http://www.postgresql.org/docs/7.3/static/datatype-datetime.html
 191  
      * which defined PostgreSQL dates as YYYY-MM-DD hh:mm:ss
 192  
      * @param date the date to format
 193  
      * @return The properly formatted date String.
 194  
      */
 195  
     public String getDateString(Date date)
 196  
     {
 197  0
         DateFormat df = new SimpleDateFormat(DATE_FORMAT);
 198  0
         StringBuffer dateBuf = new StringBuffer();
 199  0
         char delim = getStringDelimiter();
 200  0
         dateBuf.append(delim);
 201  0
         dateBuf.append(df.format(date));
 202  0
         dateBuf.append(delim);
 203  0
         return dateBuf.toString();
 204  
     }
 205  
 
 206  
     /**
 207  
      * Whether ILIKE should be used for case insensitive like clauses.
 208  
      *
 209  
      * As postgres uses ILIKE, this mimplementation returns true.
 210  
      *
 211  
      * @return true if ilike should be used for case insensitive likes,
 212  
      *         false if ignoreCase should be applied to the compared strings.
 213  
      */
 214  
     public boolean useIlike()
 215  
     {
 216  0
         return true;
 217  
     }
 218  
 }

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