how to check an object is not null in XHTML

[tienlantri]

Hi,

I have an entity OPERATION who contains 2 other entities PREST AND CONSIGNE (can be null)

public class Operation implements Serializable {
    private long               id;

    private Prestation         prestation;

    private Consigne           consigne;

}

I retrieve a list of operation in action and declare it as @DataModel

@DataModel
 private List<Operation>  operations;

In xhtml file, I need to show a list of operation who is either PREST or CONSIGNE. Each of them have different properties.

public class Prest implements
        java.io.Serializable {

    private long                   id;
    private int                    numeroGca;
    private Eftco                  eftco;
}

public class Consigne implements Serializable {
    private long                   id;
    private String                 code;
}

I don't know how to check if OPERATION contains PREST or CONSIGNE in XHTML in order to get their property to show in DataTable.
Please help me!

Thanks,
Tina

[lvdberg]

Hi,

you can test  with the empty operator and use a if-then-else construct within the EL.
Something like:

#{not empty operation.prestation ? operation.prestation.whatever : "alternative"} 

If you want to test if the var is empty , skip the not

Leo

[tienlantri]

thank you very much Leo. It works!!!

Tina