Evaluate binding expressions #{...} from Bean methods?

Hello all,
is it possible to evaluate the binding expressions that are usually given in the JSP page (e.g. #{someObject.someProperty} ) from a Bean method?
I am currently searching for a more convenient way of accessing the resource bundle from a validator and could imagine an access over #{msg.someText}.

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Accessing view object class (impl) method from bean (or vice versa)

Halo everyone, I am using JDeveloper 11.1.2.1.0
I have a UsersViewImpl class with a method which refresh the user table like below.
public void resetEmployeeSearch() {
removeApplyViewCriteriaName("viewCriteria");
executeQuery();
and I have a UserBean class with a method which reset the search fields values like below.
public void resetInput(ActionEvent actionEvent) {
........RichInputText = input ...
input.setValue("");
AdfFacesContext.getCurrentInstance().addPartialTarget(searchForm);
I would like to implement it in such a way that, once I press a button, both methods will be called.
I have tried to call from bean method using UsersViewImpl vs = new UsersViewImpl ..... which is wrong and wont work.
I have read about doing something like ViewObject vo = am.findViewObject("DeptView1") but I duno how to use it because I cant have a proper example.
Any suggestion on accessing view object class (impl) method from bean (or vice versa)?
Or is there any way to combine both method in the same class ?
Thank you :(

User, if you get class not found exceptions you need to tell us which classes you can't find. The JSFUtils and ADFUtils classes needing some other libraries which should already be part of your Fusion Web Application template (which your adf application should be based on). If you did not use this application template, you may have to add some libraries yourself.
What is the diff of using the ADFUtils and OperationBinding way?
The ADFUtils can get you access to the application module which you then use to call exposed methods on. The disadvantage of doing this is that you have to implement your own exception framework which then handles exceptions thrown by the application module. An other thing is that if you e.g. alter a VO which you use on the page this changes are not seen on the page until you refresh the page. The binding layer does not know about these changes so the iterators (which are used on the page to show the data) are not refreshed and so you don't see the changes.
In general you should avoid using the application modul in a managed bean method and always use the binding layer (OperationBinding) to call methods. This ensures that exceptions are all handled the same way and that changes to the data model are reflected in the GUI.
Timo

Action from bean called out from jsp form

Hello, I''ve got problem: i have a form inside a jsp site. It is some searching form: i have inputtext and a "search" button.
I have action connected with this button <h:commandButton id="search" value="Search" action="#{MyBean.searchj}"/>. It works fine when user press that button, the method from bean is been called out, but usually when user is using so kind of form, he press "enter" key instead of pressing "search" button.
How can I bind (or call) bean method (in this example it is MyBean.search method) when after user writes something in inputtext and press "enter" key?
Thanks in advance.

It is a known problem in the current jsf-ri implementation. There is a component of the third party library that sovles this problem.
See: http://www.jsftutorials.net/defaultActionTag.html
You can use this library (it is free) or take the javascript code and insert it into your page.

Calling a backend bean method from another class

Hi,
I'm new in JSF & in this forum so maybe this question is already aswer.
My problem is that I made a jsf component to deal with a tree menu. The resources in the leaf nodes of the menu are stored in a action calling pattern (i.e.: #{myBean.myMethod}) & I'm looking for a way to bind & execute the call from the class of the component that treats the events.
I suppose that I need to get the current instance of the context, get the bean location, instance it & invoke the method, but I don�t know how.
I have another more question, may this resource invocation have any kind of undesirable side effect, I meen, it's me & not the faces context who is making the call so I'm not sure if that the best way to solve the problem.
Thanks in advance.

If I understand what you're saying correctly... you have a component which enables a user to select an action (leaf nodes in the menu). You are processing this selection in your component and now have a EL expression that looks like #{myBean.myMethod}. You now need to know how to use that expression from Java code to invoke it. Is that correct?
If so:
FacesContext ctx = FacesContext.getCurrentInstance();
MethodBinding mb = ctx.getApplication().createMethodBinding("#{myBean.myMethod}", new Class[] {});
mb.invoke(ctx, null);
This should do what you want. If you need to pass arguments to the method, you can do that as well... you need to pass in the types via the Class[], and the objects via an Object[] instead of null.
Note also that the API's for EL change for JSF 1.2 to the standard EL API's, however, the older API's (above) are still supported.
Ken Paulsen
https://jsftemplating.dev.java.net

Faces config exception - Can't get value from value binding expression:

the menuItem_Department shown property takes value from userRight's session bean object userDetail.
class UserRights{
    public boolean mDept = false;
    public boolean loggedIn = false;
    public boolean admin = false;
   //accessors
}now, the shown property picks correct value for #{userDetail.admin} but gives erros on this. any idea how to get around this exception:
Managedbean menuItem_Department could not be created Can't get value from value binding expression: '#{userDetail.mDept}'.
javax.faces.FacesException: Can't get value from value binding expression: '#{userDetail.mDept}'     at com.sun.faces.config.ManagedBeanFactory.evaluateValueBindingGet(ManagedBeanFactory.java:903)
     at com.sun.faces.config.ManagedBeanFactory.setPropertiesIntoBean(ManagedBeanFactory.java:547)
     at com.sun.faces.config.ManagedBeanFactory.newInstance(ManagedBeanFactory.java:233)
     at com.sun.faces.application.ApplicationAssociate.createAndMaybeStoreManagedBeans(ApplicationAssociate.java:256)
.. stack tracepointers appreciated.
reagrds
Rabs

well, i figured out the problem so thought to share with all aswell.
all i changed was the name of the variable from mDept to dept.
java beans has its own set of rules and naming conventions which i have not read much about but this problem had to do sumthing with that!
just changing the name simply works fine!

How to call backing bean method from java script

Hi,
I would like to know how to call backing bean method from java script.
I am aware of serverListener and [AjaxAutoSuggest article|http://www.oracle.com/technology/products/jdev/tips/mills/AjaxAutoSuggest/AjaxAutoSuggest.html]
but i am running in to some issues with [AjaxAutoSuggest article|http://www.oracle.com/technology/products/jdev/tips/mills/AjaxAutoSuggest/AjaxAutoSuggest.html]
regarding which i asked for help in other thread with subject ....Question on AjaxAutoSuggest article (Ajax Transactions Using ADF and J...)
The reason why i posted is ( though i realise both are duplicates) .. that threads looks as a specific question to that article hence i would like to ask the quantified problem is asked in this thread.
So could any please letme know how to call backing bean method from java script
Thanks
Murali
Edited by: mchepuri on Oct 24, 2009 6:17 PM
Edited by: mchepuri on Oct 24, 2009 6:20 PM

Hello,
May know how to submit a button autoamtically on onload of page with clicking a welcome alert box. the submit button has managed button too to show a message on console using SOP.
the problem is.
1. before loading the page a javascript comes on which i clicked ok
2. the page gets loaded and the button is there which gets automatically clicked and the managed bean associated with prints a message on console using SOP.
I m trying to do this through server listener and click listener. the code is(adf jspx page)
<?xml version='1.0' encoding='UTF-8'?>
<jsp:root xmlns:jsp="http://java.sun.com/JSP/Page" version="2.1"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:af="http://xmlns.oracle.com/adf/faces/rich">
<jsp:directive.page contentType="text/html;charset=UTF-8"/>
<f:view>
<af:document id="d1" binding="#{backingBeanScope.backing_check4.d1}">
<af:form id="f1" binding="#{backingBeanScope.backing_check4.f1}">
<af:commandButton text="commandButton 1"
binding="#{backingBeanScope.backing_check4.cb1}"
id="cb1" action="#{beanCheck4.submit1}"/>
<af:clientListener type="click" method="delRow"/>
<af:serverListener type= "jsServerListener"
method="#{backingBeanScope.backing_check4.submit1}"/>
<f:facet name="metaContainer">
<af:resource type ="javascript">
x=confirm("hi");
// if(x){
delRow = function(event){
AdfCustomEvent.queue(event.getSource(), "jsServerListener", {}, false);
return true;
</af:resource>
</f:facet>
</af:form>
</af:document>
</f:view>

</jsp:root>
the backing bean code is -----
public class classCheck4 {
public classCheck4() {
public String submit1() {
System.out.println("hello");
return null;
}

ADF: is it possible to call bean methods from a DataForwardAction?

Hi,
i have created an ADF data control from bean and I have some values bound and populated in a page. As part of the Action class i would like to execute one of the methods in the bean. Is this possible or am i taking the wrong approach?
regards,
Brenden

Yes, there are a few ways of doing it, please see...
http://www.ps-scripts.com/bb/viewtopic.php?t=3109

How to call a bean method from javascript event

Hi,
I could not find material on how to call a bean method from javascript, any help would be appreciated.
Ralph

Hi,
Basically, I would like to call a method that I have written in the page java bean, or in the session bean, or application bean, or an external bean, from the javascript events (mouseover, on click, etc...) of a ui jsf component. I.e., I would like to take an action when a user clicks in a column in a datatable.
Cheers,
Ralph

How to call a EJB method from Session bean method

Hi all,
I'm new to J2EE programming. I have a simple doubt .
I have already created a lookup method for EJB bean in Session bean .
My question is how to call a method of an ENTITY bean (say insertRow) from SESSION bean method(Say invoke_insertRow) .
Please provide me an example code .
Thanks in advance.

InitialContext ctx = new InitialContext();
     GeneralEditor editor = (GeneralEditor) ctx
                    .lookup("GeneralEditorBean/remote");
          GeneralService service = (GeneralService) ctx
                    .lookup("GeneralServiceBean/remote");
          LanMu lm = new LanMu();
          lm.setName("shdfkhsad");
          editor.add(lm);

How to achieve Entity Bean methods ONLY by calling them from a Session Bean

Hi,
I used a session bean as a business facade to a entity bean.
In the session bean I achieve the entity bean with a jndiContext.lookup("java:comp/env/ejbEntityBean").
Now I am looking for a solution that it is only possible to call the entity bean methods or the whole entity bean from the corresponding session bean.
In other words: "How can I forbid the access to the entity bean, if the calling object is not the corresponding session bean?"
--->
I only found a way the regulate the access to the entity bean methods by declaring a security-role.
But the existence of the security-role at runtime depends on the calling user-authorizations!
Is there a way to set the entity-security-role within the session bean context?
Best Regards
Steffen

Hi Srikanth Reddy.T,
sorry, I am not looking for a special tag <entity-security-role>.
I am looking for a way to specifiy that my session bean "has" the special security-role (in my case "WebZaehlerEjbRole") of my entity bean "in my case "WebZaehlerEjbRole") that is necessary to call the methods (findAlleEntries, findByWindowId,...) of my entity-bean.
Here is the relevant part of my ejb-jar.ml:
     <assembly-descriptor>
          <security-role>
               <role-name>WebZaehlerEjbRole</role-name>
          </security-role>
          <method-permission>
               <description>method-permission</description>
               <role-name>WebZaehlerEjbRole</role-name>
               <method>
                    <ejb-name>WebZaehlerBean</ejb-name>
                    <method-name>findAllEntries</method-name>
                    <method-params/>
               </method>
               <method>
                    <ejb-name>WebZaehlerBean</ejb-name>
                    <method-name>findByWindowId</method-name>
                    <method-params>
                         <method-param>java.lang.Long</method-param>
                    </method-params>
               </method>
Regards,
Steffen

Calling stored procedure from session bean method

I have a situation like this :
I have one method on a stateless session bean (and I mark this method as container managed transaction). For database related stuff, I am not using entity beans, I am using my own layer of OR mapping. This method does a lot of stuff and it involves many trips to the database, as a result of which the performance is very poor. I have identified certain pieces of functionality from this method which I think can be moved to stored procedures, while some of the functionality can still remain in the session bean method. So my scenario is like this :
session bean method start
store some data in tables(using my OR layer)
call the stored procedure
session bean method end
My question is :
Will the data that I am storing in tables from within the session bean method, be available to the code executing inside stored proc.
secondly, how do I sync the transcation which is being initiated by the container with the transaction under which the stored proc is executing or is it that the stored procedure code will also be executing under the container managed transcation.
Thanks
Vimal

Hi Vimal,
Will the data that I am storing in tables from within
the session bean method, be available to the code
executing inside stored proc.There's only one way to find out (isn't there?)
secondly, how do I sync the transcation which is
being initiated by the container with the transaction
under which the stored proc is executing or is it
that the stored procedure code will also be executing
under the container managed transcation.Again, why not just "suck it and see!"
[Or is there some reason why you can't?]
As I interpret the EJB specification, if the transaction attribute for your session bean method is such that it starts a transaction, then that transaction will be terminated when the method completes -- and every operation that occurs within the framework of that method will be in the one transaction.
In other words, your database stored procedure should execute within the same transaction as your O/R mapping layer.
However, how OC4J behaves may not exactly follow what is written in the (EJB) specification. Hence I repeat, "try it and see for yourself".
Put it this way: as far as I know, the only way that your stored procedure would NOT see the changes made by your O/R mapping layer is if they both executed in separate transactions and the O/R mapping layer did not commit its changes before the stored procedure began its execution.
Hope this has helped.
Good Luck,
Avi.

Calling backing bean method from HttpSessionListener

Hi,
I am detecting session expiration through HttpSessionListener's sessionDestroyed() method. I have a logout() method in my backing bean which does all the session clean up. If the user clicks the logout link, then I call the logout method and do the clean up. But when the user closes the browser, then I believe that the HttpSessionListener's sessionDestroyed() method will be called. How do I call the logout() method of my backing bean from from sessionDestroyed() method of HttpSessionListener.

I did as you said, but the finalize method is never called. I can see the session timing out and sessionDestroyed() method being called, but not the finalize() method. Here is the code for sessionDestroyed()
    public void sessionDestroyed(HttpSessionEvent sessionEvent){
        System.out.println("Session Destroyed Called");
        HttpSession session = sessionEvent.getSession();
        session.invalidate();
        System.gc();
    }and for finalize()
    public void finalize() throws Throwable{
        System.out.println("In Finalize Method");
        FacesContext ctx = FacesContext.getCurrentInstance();
        Object requestObject = ctx.getApplication().getVariableResolver().
                               resolveVariable(ctx, "databaseCon");
        DatabaseCon databaseCon = (DatabaseCon) requestObject;
        Connection con = databaseCon.getConnection();
        String sql = "DELETE FROM TEMP WHERE EX_ID = ?";
        PreparedStatement pstmt = con.prepareStatement(sql);
        pstmt.setInt(1,this.getExId());
        pstmt.executeUpdate();
        super.finalize();
    }

H:inputText ; How To initialize value Property from back/bean method?

Hello Guys at Sun Forums.
I am a newbie at using JSF. and I'm having a bit of a Problem.
I don't know how to initialize the value property of a h:inputText from a method inside a backing bean that returns a String data type.
My Method inside the Backing bean is this:
public String getLastDate()
        Connection con = null;
        Statement stmt = null;
        ResultSet rs = null;
        Date DateCapt = null;
        String DateConv= null;
        try{
            Class.forName("com.sybase.jdbc2.jdbc.SybDrive").newInstance();
            con = DriverManager.getConnection("jdbc:sybase:Tds:localhost/BAN_PRO_SNP", "xxxx", "xxxx");
            if(!con.isClosed()){
                stmt = con.createStatement();
                stmt.executeQuery ("SELECT TOP 1 CONVERT(VARCHAR(10), fec_parametro, 103) fec_parametro FROM snp_sei_parametros" +
                "     WHERE cod_parametro = 'FECHA'" +
                "     ORDER BY fec_parametro DESC");
                rs = stmt.getResultSet();
                while (rs.next())
                            DateCapt = rs.getDate("fec_parametro");
            rs.close();
            stmt.close();
        catch (Exception ex)
                    System.out.println("COULD NOT LOAD THE DRIVER!!!!");
                    System.out.println(ex);
                DateConv = String.valueOf(DateCapt).toString();
    return DateConv;
}As you can see the Method returns a String data type, and all I want to know is how put that returned String as the initial value of a h:inputText. when the jsf-jsp page loads.
Please Help Me.

You should be able to do
   <h:inputText value="#{bean.lastDate}"/>Where 'bean' is the managed bean name containing
the method getLastDate().
When the view is rendered, the getter (getLastDate())
will be called to display whatever value is returned.

Invoking binding operation from backing bean -- no data displayed in ADF table ?

Hello experts, I have data control derived from Web Service proxy client. In this data control, I have multi record list derived from web service call.In my ADF page, I have bunch of input components with many drop down lists and radio buttons, check boxes etc.
Finally I want to transfer user input to   data control.   In my ADF page, I have mapped the result set of data conrol to ADF table.
When I click submit button, the   input data from ADF page is passed to data control operation.   In the bean method, I am making use of   operationBinding.execute() and operationBinding.getParamsMap().put().     I see it is fetching data by checking getResult().
I am invoking partial trigger also on the table. However, table is not getting populated with the data.
please help me.     Jdeveloper verion is 11.1.1.6.     I have set "Refresh" attribute to "never" for iterator in the bindings tab.    But no luck. I see that control coming to data control and calling web service and getting the data and then it comes back to my bean method submit() and I see that getResult() is showing records fetched.   But why the table on ADF page is not showing the data ?
thanks a lot in advance.

I still not able to get my table updated with data. If I set   "Refresh" to "ifNeeded", soon after coming out of submit method of bean, it again tries to execute the web service call in the data control and brings empty result since the search parameters are empty. I do not know why it goes again to data control method.    So, when I hit submit button, the bean method calls operationBidnding.execute() and before this I set the parameters also.    After execute(), addPartialTarget() gets executed and it comes out of submit.   At this time, it is supposed to go to ADF page. But I see that it tries to execute method in data control with empty parameters.   This is ridiculous.    It neither works with "never", nor with "ifNeeded".
I see many forums on this issue but no solution found...all those forums are not answered. This looks like it is a bug in ADF table not able to refresh from managed bean !!!!
thanks

Dynamic binding expression to get data from array

I am retrieveing from an object to label my button as
follows:
quote:
<mx:Button label = "{wordlist.word.LABEL[0][index]}"
I now want the binding expression to be dynamic, meaning that
LABEL has to be a variable. How would I do this?
quote:
<mx:Button label =
"{wordlist.word.????[LABEL]????[0][index]}"

"lunacafu" <[email protected]> wrote in
message
news:gqte13$1g4$[email protected]..
>I am retrieveing from an object to label my button as
follows:
>
>
quote:
<mx:Button label = "{wordlist.word.LABEL[0][index]}"
>
> I now want the binding expression to be dynamic, meaning
that LABEL has to
> be
> a variable. How would I do this?
>
>
quote:
<mx:Button label =
"{wordlist.word.????[LABEL]????[0][index]}"
First, if wordlist.word.LABEL is an XMLListCollection or
ArrayCollection,
you need to use getItemAt instead of bracket notation. Once
you get to that
point, you need to cast it to whatever data type the object
at 0 is.
HTH;
Amy

Evaluate binding expressions #{...} from Bean methods?

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