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User Guide
The information contained in this section applies to IBM WebSphere Commerce Version 7.0.0.9 and Feautre Pack 8. The documentation also applies to all subsequent releases and modifications until otherwise indicated in new editions.
Developing
The topics in the Developing section describe tasks performed by an application developer.
Persistence layer
The interaction between the business objects and persistence layer is isolated in an object called the Business Object Mediator. Business object document (BOD) commands interact with the Business Object Mediator to handle the interaction with the logical objects and how they are persisted.
Creating a simple data bean
A data bean is a Java bean that is used in JSP pages to retrieve information from the enterprise bean. A simple data bean extends its corresponding access bean and implements the SmartDataBean interface. By extending an access bean, the data bean provides a simple indirect representation of an entity bean: it encapsulates the properties that can be retrieved from or set within the entity bean. Most code for the data bean is automatically generated by Rational Application Developer. You should store new data beans in the WebSphereCommerceServerExtensionsLogic project.
Modifying the populate method
Before using your new data bean, you must ensure that you populate the bean with its required data in the populate method. This data may include data from the database and input parameters upon instantiation.

Modifying the populate method

Before using your new data bean, you must ensure that you populate the bean with its required data in the populate method. This data may include data from the database and input parameters upon instantiation.

About this task

In following example the UserResDataBean is populated with data from the database using the refreshCopyHelper method:

Procedure

Expand the UserResDataBean data bean to view its fields and methods.
In the Outline view, select the populate() method to view its source code. It initially appears as follows:
```
public void populate () throws Exception {}
```

Modify the source code so the method appears as follows:


try {
        super.refreshCopyHelper();
} 
catch (javax.ejb.FinderException e) {
        throw new
ECSystemException(ECMessage._ERR_CREATE_EXCEPTION,
        "UserResDataBean", "populate");

Save your changes.