Null Integer/String converted to default objects?

[arnoldussen]

Hi,

i am implementing search functionality for objects from the database. All is fine except for the specification of a null value for any Integer or String property of the object. Whenever a null value is passed for either of these they will be instantiated as empty string or Integer(0).

I have tried specifying the context parameter to allow null strings to be submitted:

    <context-param>

        <param-name>javax.faces.INTERPRET_EMPTY_STRING_SUBMITTED_VALUES_AS_NULL</param-name>

        <param-value>true</param-value>

    </context-param>

but this has no effect (i was hoping this would work for both strings and integers, but it works for neither).

I considered adding a converter to change strings to null, but then i would still have a problem for the Integer field(s). I can't turn 0 into null because sometimes the value to be searched is 0 ...

I am using JBoss AS  6.0.0.Final (with it's standard Mojarra implementation 2.0.3)

Ãny ideas on how to achieve a working solution are most welcome!

[ssilvert]

I think this is broken in AS6 right now.  I'll look into it and see if it can be fixed for 6.1.0.

https://issues.jboss.org/browse/JBAS-8751

Stan

[arnoldussen]

Thank you for the response; I read your link, and i noticed nothing is stated about the behavior of Integer.

The jsf2.0 spec does not state a specific behavior for Integer(0) vs null. Is anything planned for this?

[ssilvert]

arnoldussen wrote:

The jsf2.0 spec does not state a specific behavior for Integer(0) vs null. Is anything planned for this?

I don't know.  You'd have to direct that to the JSF expert group for the next version.

Stan

[lafr]

I had the same problem, at least with integer values.

I somewhere found a hint to add

JAVA_OPTS="$JAVA_OPTS -Dorg.apache.el.parser.COERCE_TO_ZERO=false"

to JBoss' startup options.