Coverage report

  %line %branch
org.apache.torque.oid.AutoIncrementIdGenerator
22% 
89% 

 1  
 package org.apache.torque.oid;
 2  
 
 3  
 /*
 4  
  * Copyright 2001-2005 The Apache Software Foundation.
 5  
  *
 6  
  * Licensed under the Apache License, Version 2.0 (the "License")
 7  
  * you may not use this file except in compliance with the License.
 8  
  * You may obtain a copy of the License at
 9  
  *
 10  
  *     http://www.apache.org/licenses/LICENSE-2.0
 11  
  *
 12  
  * Unless required by applicable law or agreed to in writing, software
 13  
  * distributed under the License is distributed on an "AS IS" BASIS,
 14  
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 15  
  * See the License for the specific language governing permissions and
 16  
  * limitations under the License.
 17  
  */
 18  
 
 19  
 import java.math.BigDecimal;
 20  
 import java.sql.Connection;
 21  
 import org.apache.torque.adapter.DB;
 22  
 import org.apache.torque.util.SQLBuilder;
 23  
 import com.workingdogs.village.QueryDataSet;
 24  
 import com.workingdogs.village.Record;
 25  
 import com.workingdogs.village.Value;
 26  
 
 27  
 /**
 28  
  * This generator works with databases that have an sql syntax that
 29  
  * allows the retrieval of the last id used to insert a row for a
 30  
  * Connection.
 31  
  *
 32  
  * @author <a href="mailto:jmcnally@collab.net">John D. McNally</a>
 33  
  * @version $Id: AutoIncrementIdGenerator.java 239630 2005-08-24 12:25:32Z henning $
 34  
  */
 35  
 public class AutoIncrementIdGenerator implements IdGenerator
 36  
 {
 37  
     /** the adapter that knows the correct sql syntax */
 38  
     private DB dbAdapter;
 39  
 
 40  
     /** The internal name of the Database that this Generator is connected to */
 41  3
     private String name = null;
 42  
 
 43  
     /**
 44  
      * Creates an IdGenerator which will work with the specified database.
 45  
      *
 46  
      * @param dbAdapter the adapter that knows the correct sql syntax.
 47  
      * @param name The name of the datasource to find the correct schema
 48  
      */
 49  
     public AutoIncrementIdGenerator(final DB dbAdapter, class="keyword">final String name)
 50  3
     {
 51  3
         this.dbAdapter = dbAdapter;
 52  3
         this.name = name;
 53  3
     }
 54  
 
 55  
     /**
 56  
      * Returns the last ID used by this connection.
 57  
      *
 58  
      * @param connection A Connection.
 59  
      * @param keyInfo an Object that contains additional info.
 60  
      * @return An int with the value for the id.
 61  
      * @exception Exception Database error.
 62  
      */
 63  
     public int getIdAsInt(Connection connection, Object keyInfo)
 64  
         throws Exception
 65  
     {
 66  0
         return getIdAsVillageValue(connection, keyInfo).asInt();
 67  
     }
 68  
 
 69  
     /**
 70  
      * Returns the last ID used by this connection.
 71  
      *
 72  
      * @param connection A Connection.
 73  
      * @param keyInfo an Object that contains additional info.
 74  
      * @return A long with the value for the id.
 75  
      * @exception Exception Database error.
 76  
      */
 77  
     public long getIdAsLong(Connection connection, Object keyInfo)
 78  
         throws Exception
 79  
     {
 80  0
         return getIdAsVillageValue(connection, keyInfo).asLong();
 81  
     }
 82  
 
 83  
     /**
 84  
      * Returns the last ID used by this connection.
 85  
      *
 86  
      * @param connection A Connection.
 87  
      * @param keyInfo an Object that contains additional info.
 88  
      * @return A BigDecimal with the last value auto-incremented as a
 89  
      * result of an insert.
 90  
      * @exception Exception Database error.
 91  
      */
 92  
     public BigDecimal getIdAsBigDecimal(Connection connection, Object keyInfo)
 93  
         throws Exception
 94  
     {
 95  0
         return getIdAsVillageValue(connection, keyInfo).asBigDecimal();
 96  
     }
 97  
 
 98  
 
 99  
     /**
 100  
      * Returns the last ID used by this connection.
 101  
      *
 102  
      * @param connection A Connection.
 103  
      * @param keyInfo an Object that contains additional info.
 104  
      * @return A String with the last value auto-incremented as a
 105  
      * result of an insert.
 106  
      * @exception Exception Database error.
 107  
      */
 108  
     public String getIdAsString(Connection connection, Object keyInfo)
 109  
         throws Exception
 110  
     {
 111  0
         return getIdAsVillageValue(connection, keyInfo).asString();
 112  
     }
 113  
 
 114  
     /**
 115  
      * A flag to determine the timing of the id generation
 116  
      *
 117  
      * @return a <code>boolean</code> value
 118  
      */
 119  
     public boolean isPriorToInsert()
 120  
     {
 121  0
         return false;
 122  
     }
 123  
 
 124  
     /**
 125  
      * A flag to determine the timing of the id generation
 126  
      *
 127  
      * @return a <code>boolean</code> value
 128  
      */
 129  
     public boolean isPostInsert()
 130  
     {
 131  0
         return true;
 132  
     }
 133  
 
 134  
     /**
 135  
      * A flag to determine whether a Connection is required to
 136  
      * generate an id.
 137  
      *
 138  
      * @return a <code>boolean</code> value
 139  
      */
 140  
     public final boolean isConnectionRequired()
 141  
     {
 142  0
         return true;
 143  
     }
 144  
 
 145  
     /**
 146  
      * Returns the last ID used by this connection.
 147  
      *
 148  
      * @param connection A Connection.
 149  
      * @param keyInfo an Object that contains additional info.
 150  
      * @return A Village Value with the last value auto-incremented as a
 151  
      * result of an insert.
 152  
      * @exception Exception Database error.
 153  
      */
 154  
     private Value getIdAsVillageValue(Connection connection, Object keyInfo)
 155  
         throws Exception
 156  
     {
 157  0
         String tableName = SQLBuilder.getFullTableName(String.valueOf(keyInfo), name);
 158  0
         String idSQL = dbAdapter.getIDMethodSQL(tableName);
 159  0
         Value id = null;
 160  0
         QueryDataSet qds = null;
 161  
         try
 162  
         {
 163  0
             qds = new QueryDataSet(connection, idSQL);
 164  0
             qds.fetchRecords(1);
 165  0
             Record rec = qds.getRecord(0);
 166  0
             id = rec.getValue(1);
 167  
         }
 168  
         finally
 169  
         {
 170  0
             if (qds != null)
 171  
             {
 172  0
                 qds.close();
 173  
             }
 174  
         }
 175  0
         return id;
 176  
     }
 177  
 }

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