At times it is necessary to override or extend the functionality in core MAXIMO. This can be achieved by ‘extending’ methods in the Maximo business objects. The following section outlines the process involved in extending the add() method in the Items application. This same approach can be used to extend any add() method from the core Maximo business objects. Review the javadocs for more details on methods available.

Scenario: On insert of an item in the Item Master application, we would like an extra field to be set to a specific value on the Item table. In order to perform this functionality, follow the steps below to extend the add() method on the Item package.

By reviewing the javadocs, the add method can be located in the Item object. We will need to create two new files, ItemTest and ItemTestSet. ItemTest will extend the add() method in the Item class and ItemTestSet will return the reference of our new object ‘ItemTest’.

We need to create our two new java files that will extend core MAXIMO. Here are the two files:

ItemTest.java

package psdi.app.item;
import psdi.util.*;
import psdi.mbo.*;
import java.rmi.*;

public class ItemTest extends Item implements ItemRemote
{
  public ItemTest(MboSet ms) throws MXException, RemoteException
  {
    super(ms);
  }
  /**
  * Add a new item - set field default value for extra field
  * Set itemextra01 field to be 'TEST' each time an item is created.
  * Note: itemextra01 field does not exist, this is used as an example.
  * The add method is overridden. The super.add will add all other
  * calls in the original add method of the Item class.
  **/
  public void add() throws MXException, RemoteException
  {
    setValue("itemextra01", "TEST");
    super.add();
  }
}

ItemTestSet.java

package psdi.app.item;
import psdi.mbo.*;
import psdi.util.*;
import java.rmi.*;

public class ItemTestSet extends ItemSet implements ItemSetRemote
{
  public ItemTestSet(MboServerInterface ms) throws MXException, RemoteException
  {
    super(ms);
  }
  protected Mbo getMboInstance(MboSet ms) throws MXException, RemoteException
  {
    return new ItemTest(ms);
  }
}

Next, All class files should be compiled and rmic’d. The command to rmic is:

In a DOS cmd prompt, change directory to maximo_root\applications\maximo\businessobjects\classes\

rmic -d . psdi.app.item.ItemTest
 rmic -d . psdi.app.item.ItemTestSet

 

We need to update the database with our new class files. The two tables that will need to be affected are Maxobject and Maxobjectcfg. The field ‘classname’ in the two tables needs to be registered with the new class ItemTestSet for the ITEM Business Object. Below are the updates for each table:

update maxobject set classname='psdi.app.item.ItemTestSet' where objectname='ITEM';
update maxobjectcfg set classname='psdi.app.item.ItemTestSet' where objectname='ITEM';

Launch Maximo and open the Item Master application. When the application launches, select insert from the toolbar. You will notice that the application will insert a new record with the extra field defaulting to the value ‘TEST’.

Note: itemextra01 field does not exist, this is used as an example. If the field itemextra01 is created, it will also need to be added to the presentation for it to be displayed.

Provided by IBM Support