change label value using value stored at session

i have two jsf pages (home.jsf and employees.jsf) , home page has a button that navigates to employees page, while navigating i store value in session scope at (Managed bean)

    public void putSessionAL(ActionEvent actionEvent) {
    FacesContext.getCurrentInstance().getExternalContext().getSessionMap().put("key","value");
}

public String navigate() {
    return "employees";
}

i want to change Label at employees viewObject from UIHints tab depending on value stored at session using the following groovy expression

adf.context.sessionScope.key

and changed trustMode to trusted but it fires the following exception

oracle.jbo.script.ExprScriptException: JBO-29114 ADFContext is not setup to process messages for this exception. Use the exception stack trace and error code to investigate the root cause of this exception. Root cause error code is JBO-25188. Error message parameters are {0=Employees.FirstName, 1=, 2=oracle.jbo.script.ExprSecurityException}
at oracle.jbo.script.ExprScriptException.throwException(ExprScriptException.java:316)
at oracle.jbo.script.ExprScriptException.throwExceptionWithExprDef(ExprScriptException.java:387)
at oracle.jbo.ExprEval.processScriptException(ExprEval.java:599)
at oracle.jbo.ExprEval.doEvaluate(ExprEval.java:697)
at oracle.jbo.ExprEval.evaluate(ExprEval.java:508)
at oracle.jbo.ExprEval.evaluate(ExprEval.java:487)
at oracle.jbo.common.NamedObjectImpl.resolvePropertyRaw(NamedObjectImpl.java:680)
at oracle.jbo.server.DefObject.resolvePropertyRaw(DefObject.java:366)

Solution

One way to do it at the VO UIHint attribute label level will be programmaticaly by doing as follow :

In your VO go to the java tab and add the RowImpl java class

In the VORowImpl Add the following function

public String getMySessionLabel() {     
    return (String)FacesContext.getCurrentInstance().getExternalContext().getSessionMap().get("key");
}

In the Label add the following EL expression :
```
adf.object.getMySessionLabel()
```

This technique allow you more control than pure EL, if you want to do more than getting from session for example. In your case pure EL, as you did, should work as well. (Would need to check what is wrong with yours, maybe just missing the

        #{adf.context.sessionScope.key}