I am trying to set up a constraint but cannot figure out how to do it.

My class looks something like this:

public class Entity {
@Column
private String firstName;

@Column
private String lastName;

@Column
private String companyName;

//getters and setters ...
}

I wanted to set up a constraint that would allow me to check that at least one of the fields in this class is not null, that way we don't persist a record with all the fields null.

I can't use @NotNull because there is no conditional that checks if the other field was filled in or not.

What is the best way to implement this? I tried looking in the forum but didn't have any luck.

Thanks in advance,

Omar

A custom class level constraint would be easiest. Check the online documentation for help. An alternative would be to use the Hibernate Validator ScriptAssert constraint. Again, have a look at the online manual.

--Hardy

Hi,

You can use scriptAssert annotation but this will be available with Java6, if you are using 5, or earlier you should put JSR 223 RI to classpath.

@ScriptAssert(lang = "javascript", message= "first name,last name, and company name cannot be null at the same time.", script = "_this.firstName == null || _this.lastName == null || _this.companyName == null"

no hibernate annotation at class level.