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6.2. Default Display Value
6.2.1. Using EL expressions
In the Application Definition Editor you can set the Default Display Value of an item.
This value is used when creating new rows.
For example, a new employee has by default a salary of 1000:
1. Enter the default value with Application Definition Editor.
2. Generate/run your application and create a new record. The default display
value is shown now in the column.
In addition to literal values, you can enter Expression Language in the Default Display
Value.
Imagine that for new employees the salary must be calculated based on job and so on.
Assume the result of the calculation is stored on the session context in an object called
Salary with method getDefaultSalary. In such a situation enter for Default Display Value
the EL #{salary.defaultSalary}
Use the same technique to display the current date: store it on the request or session and
enter an EL expression for showing on a page.
JHeadstart Developer’s Guide Generating User Interface Widgets 6- 3