CustomerExampleDAO


1   package test.dao;
2   
3   import test.interfaces.CustomerPK;
4   import test.ejb.CustomerBMPBean;
5   import java.util.*;
6   import javax.ejb.*;
7   
8   /**
9    * Example DAO implementation class
10   */
11  public class CustomerExampleDAO
12  implements CustomerDAO
13  {
14      
15      /**
16       * Initialise DAO
17       */
18      public void init()
19      {
20          // do JNDI lookup of Datasource resource ref
21      }
22      
23      /**
24       * Called by ejbLoad
25       */
26      public void load(CustomerPK pk, CustomerBMPBean bean)
27      {
28          // SELECT FROM datasource WHERE pkfields = pk.getX()
29          // bean.setX(read values)
30      }
31      
32      /**
33       * Called by ejbStore
34       */
35      public void store(CustomerBMPBean bean)
36      {
37          // UPDATE datasource SET values = bean.getX()
38      }
39      
40      /**
41       * Called by create method(s)
42       */
43      public CustomerPK create(CustomerBMPBean bean)
44      {
45          CustomerPK pk = null;
46          // INSERT INTO datasource (values) VALUES (bean.getX())
47          // pk = new CustomerPK(pkfields)
48          return pk;
49      }
50      
51      /**
52       * Called by ejbRemove
53       */
54      public void remove(CustomerPK pk)
55      {
56          // DELETE FROM datasource WHERE pkfields = pk.getX()
57      }
58      
59      /**
60       * Called by mandatory PK finder
61       */
62      public CustomerPK findByPrimaryKey(CustomerPK pk)
63      {
64          // SELECT FROM datasource WHERE pkfields = pk.getX()
65          // if not found
66          //   throw new ObjectNotFoundException();
67          // pk = new CustomerPK(...);
68          return pk;
69      }
70      
71      /**
72       * Finder that returns all rows
73       */
74      public Collection findAll()
75      {
76          List ret = new ArrayList();
77          CustomerPK pk;
78          // SELECT FROM datasource
79          // for each resultset row
80          //   pk = new CustomerPK(...);
81          //   ret.add(pk);
82          return ret;
83      }
84      
85      /**
86       * Non-lifecycle business method delegate
87       */
88      public void backup(CustomerPK pk)
89      {
90          // INSERT INTO datasource.Archive (fields)
91          //   SELECT fields FROM Customer WHERE pkfields = pk.getX();
92      }
93  
94  }
95
A to Z: JavaDoc & Examples Daily Java News & Articles Open Source Projects Open Source Codes Free Computer Books Remove Frame
Popular Tags