For example, consider a case wherein we want to set a default value for the salary attribute
in the EmpEO.xml file based on the Deptno attribute. In this case, we have to provide an expression that will be evaluated at runtime to provide the default value. The following steps show us how to do this:
Click on the
Salattribute from the list of attributes displayed in the Attributes section ofEmpEO.xml.In the Default Value section, select the Expression option. Now the pencil icon will be enabled for the textbox below the Expression option.
Click on the pencil icon to open an Edit Expression Editor window, and add the following code in the Expression editor box:
if(Job == 'MANAGER'){ Sal = 1000; } else{ Sal = 2000; }Select the
Jobattribute as the calculation is dependent on it.Now click on the OK button to add the expression for setting a default value for the
Salattribute.