JSF Declarative Component

hi every body
i am using Oracle Jdeveloper 11g release 2
i wanted to create a Calendar Component
for this i used JSF Declarative Component
i added a RichInputText to page and a Button for opening calendar Dialog
when for first time i open Calendar Dialog and select a day ,
value of this day return to RichInputText truly but
when i wanna to open it for second time that has an error
error is:
Error:dateValue is Read only
i have to tell you dateValue is name of Attribute on JSF Declarative Component
can anybody help me?

i found a solution for this problem
thanks

Similar Messages

JSF Declarative Component - Using a method?

Hello. I'm creating a declarative component that has a submit button. I want the submit button to be defined, but I want the person using the component to define the action (ex, they specify which method from an AM to execute) How can I do this? I tried defining a method and setting the buttons action to comp.whatever. However, when the person defines the button and points the method to the binding layer, it can never located the method.
Thanks, Graeme.

Hi Shay, thanks for the response. I have read the tutorial. The only difference is in the tutorial it's executing a method on the view object. I need to execute a method on my application module. I defined it on my declarative component as:
<af:commandButton text="commandButton 1" id="dc_cb1"
actionListener="#{comp.submitRegistrationForm}"/>
As this kind of method attribute
<method-attribute>
<attribute-name>
submitRegistrationForm
</attribute-name>
<method-signature>
void submitRegistrationForm(oracle.jbo.ViewObject)
</method-signature>
<required>
false
</required>
</method-attribute>
Then I dragged in my custom component and defined my submit button as #{bindings.sendRegistration.execute} The sendRegistration is a method in my AM. I created a method binding for this as
<methodAction id="sendRegistration"
InstanceName="RegistrationAMDataControl.dataProvider"
DataControl="RegistrationAMDataControl"
RequiresUpdateModel="true" Action="invokeMethod"
MethodName="sendRegistration" IsViewObjectMethod="false"
ReturnName="RegistrationAMDataControl.methodResults.sendRegistration_RegistrationAMDataControl_dataProvider_sendRegistration_result">
<NamedData NDName="vo" NDValue="#{bindings.FirstName.attributeValue}"
NDType="oracle.jbo.ViewObject"/>
</methodAction>
However, everytime I hit the button I get an error the method does not exist. Method not found: UserRegistrationFormComponent[oracle.adf.view.rich.component.fragment.UIXInclude$ContextualFacesBeanWrapper@1572ca2, id=urf1].SubmitRegistrationForm(javax.faces.event.ActionEvent)
Is it possible to call this to my AM?
Thanks.

Embedding a declarative component written in JSF 1.2 in a jsf page

Hi ,
I have a declarative component written in JSF 1.2 . I want to embed this declarative component in an ADF application which is using JSF 2.0.
On creating a jspx page in JSF 2.0 & embedding decalrative component it just works fine but I have to embed it in a JSF page instead , which is not working.
Any suggestions ?
Thanks
Vinit

Hi,
for JDeveloper 11g R2 you will need to know before whether the application you build uses JSPX page documents or Facelets. The technologies are different (introduced with JSF 2) and declarative components thus need to be build for the document type used by teh application
Frank

More than one instance of same Declarative Component in a single JSF page

Hi,
I have problem in using more than one instance of same Declarative Component in a single JSF page.
Only one instance is visible/rendered.
If I drag and drop more than one instance of same Declarative Component in a single JSF page, only one is displayed.
Not sure why is so....have I missed on some configuration?

What version of JDeveloper are you using? What declarative component?
In general when creating JSF UI components, care must be taken to avoid certain pitfalls that happen when one uses that component more than once in a page...so depending on which component you are using, one might surmise that more or less care was taken on that component when building it.
If it was well tested though...like if it was an ADF Faces component, then that is probably not the problem.

11.1.2: Declarative-component problem!

Hi!
We're just evaluating 11.1.2. I converted some declarative components to 11.1.2/Facelets style, but I am running into problems.
As a test, I created some new components from scratch, confirming the issue.
I create a declarative component and choose "Facelets" and choose "Use custom component class".
JDeveloper then creates an entry in the jsf:
        <afc:component>
            <afc:display-name>testComponent</afc:display-name>
            <afc:component-class>component.TestComponent</afc:component-class>
            <afc:facet>
....After deployment, I just get an error. Facelets is reporting that there is no tag for "component-class", and examining component.taglib.xml in adf-richclient-impl-11.jar shows: Facelets is right! There is none!
Now, I cannot just remove the component-class entry. If I do that, then deployment works, but then JDeveloper creates during compilation a wrong "TestComponentComponent" class (which should extend TestComponent but doesn't!).
It just extends RichDeclarativeComponent, just like my original TestComponent class. All code in TestComponent is not available at runtime.
RichDeclarativeComponent
   |
   |
TestComponent    <---- This class is now for the birdsand
RichDeclarativeComponent
   |
   |
TestComponentComponent      <----- That class is used by the handlerIf I leave the component-class entry in, then - as expected - I get the correct hierarchy:
RichDeclarativeComponent
   |
   |
TestComponent
   |
   |
TestComponentComponentbut the component doesn't run.
So, now what? This cannot be the way it's supposed to work, can it. Manually edit the "component-class" stuff out of the jsf in the jar after deployment!?
Edit: Created SR 3-3856944401: Facelets-based declarative component with custom component class not working
Sascha
Edited by: Sascha Herrmann on Jun 17, 2011 6:41 PM

This is bug 12717940.
Sascha

How to access/identify components in JSF Declarative Components?

Hi,
I am beginner on ADF. Trying to build first Declarative Components.
Use Case is as follows -
I have put 2 InputTexts in Declarative Component.
Want to set some value in second InputText (txtAddressLine2) in Validator/ValueChangeListner method of first InputText(txtAddressLine2).
<?xml version='1.0' encoding='windows-1252'?>
<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=windows-1252"/>
<af:componentDef var="attrs" componentVar="component">
<af:xmlContent>
<component xmlns="http://xmlns.oracle.com/adf/faces/rich/component">
<display-name>Test</display-name>
<attribute>
<attribute-name>
AddressLine2
</attribute-name>
<attribute-class>
java.lang.String
</attribute-class>
</attribute>
<component-extension>
<component-tag-namespace>Address3</component-tag-namespace>
<component-taglib-uri>/Address3</component-taglib-uri>
</component-extension>
</component>
</af:xmlContent>
<af:inputText label="Address Line 1"
binding="#{backing_Address3.txtAddressLine1}"
id="txtAddressLine1"
validator="#{backing_Address3.txtAddressLine1_validator}"
autoSubmit="true" immediate="true" rendered="true"
valueChangeListener="#{backing_Address3.txtAddressLine1_valueChangeListener}"/>
<af:inputText label="Address Line 2" binding="#{backing_Address3.txtAddressLine2}"
id="txtAddressLine2"
validator="#{backing_Address3.txtAddressLine2_validator}"
autoSubmit="true" immediate="true"/>
</af:componentDef>

</jsp:root>
This is sample I am working on.
I am trying following approaches in bean of Component itself.
Approach I: This does not give any error, value is not set in txtAddressLine2
this.getTxtAddressLine2().setValue("Some Value");
Approach II: Not able to access txtAddressLine2 using findComponent() method
UIViewRoot uiViewRoot = facesContext.getViewRoot();
RichInputText inputText;
inputText = null;
if (uiViewRoot.findComponent("txtAddressLine2") != null) {
System.out.println("Found ");
inputText = (RichInputText)uiViewRoot.findComponent("txtAddressLine2");
inputText.setValue("my value");
} else {
System.out.println("Not Found "); //Always not found
Can anybody tell me correct way to access components and set their values inside Declarative Components itself?

Thanks buddies....its resolved!
This is how I have done it -
Components have these 2 Input Texts :
<af:inputText label="Label 1" id="txt1" autoSubmit="true" immediate="true"
binding="#{DC2.txt1}" validator="#{DC2.txt1_validator}"/>
<af:inputText label="Label 2" binding="#{DC2.txt2}" id="txt2"
immediate="true" autoSubmit="true" partialTriggers="txt1"/>
Code in Component Bean setting value is as follows:
RichInputText txt22;
txt22 = getTxt2();
txt22.setSubmittedValue("Some Value");

Declarative component are not accessable in page fragment

Hi,
I have created declarative component .. But it can access only in *.jsf page not in fragment page ...

HI,
Got it actually i have created declarative component using faclet (*.jsf) page... If i create DC using .jspx page ...its working
Thanks,
Nitesh

Create custom declarative component like container

Hi all,
I'm using Jdev 12c.
I wanna create a custom declarative component like this:
container.jsf :
<af:panelGroupLayout id="#{attrs.Name}_VIEWPORT" layout="scroll" binding="#{attrs.Binding}"
                         inlineStyle="position:absolute;width:#{attrs.ViewportWidth}px;height:#{attrs.ViewportHeight}px;top:#{attrs.ViewportY}px;left:#{attrs.ViewportX}px;border:1px solid;background:#c6c6ff;z-index:#{attrs.ZIndex};">
        <af:panelGroupLayout id="#{attrs.Name}" layout="scroll"
                             inlineStyle="position:absolute;width:#{attrs.Width}px;height:#{attrs.Height}px;">
        </af:panelGroupLayout>
    </af:panelGroupLayout>
<af:xmlContent>
        <afc:component>
            <afc:description/>
</af:xmlContent>
I use this custom component to group some child components like this:
<abc:container ...>
     <af:inputText ... />
     <af:inputText ... />
</abc:container>
But the things is in Java code, I cannot get RichInputText components :
this is my function:
    private void getFacetAndChild(UIComponent parent) {
        Iterator childrens = parent.getFacetsAndChildren();
        while (childrens.hasNext()) {
            UIComponent child = (UIComponent)childrens.next();
            System.out.println("Log child >> " + child);
            getFacetAndChild(child);
this function only print the second RichPanelGroupLayout.
Any ideas to help me to get all RichInputText ?
Thanks and Best Regards!

Hi All,
I found the solution. Just add one facet to Custom Container
<af:panelGroupLayout id="#{attrs.Name}_VIEWPORT" layout="scroll" binding="#{attrs.Binding}"
                         inlineStyle="position:absolute;width:#{attrs.ViewportWidth}px;height:#{attrs.ViewportHeight}px;top:#{attrs.ViewportY}px;left:#{attrs.ViewportX}px;border:1px solid;background:#c6c6ff;z-index:#{attrs.ZIndex};">
        <af:panelGroupLayout id="#{attrs.Name}" layout="scroll"
                             inlineStyle="position:absolute;width:#{attrs.Width}px;height:#{attrs.Height}px;">
                       <af:facetRef facetName="child"/>
        </af:panelGroupLayout>
    </af:panelGroupLayout>
<af:xmlContent>
        <afc:component>
            <afc:description/>
</af:xmlContent>
And the used page:
<abc:container ...>
     <f:facet name="child">
          <af:inputText ... />
          <af:inputText ... />
     </f:facet>
</abc:container>
Maybe this solution will help others to create a custom container
Thanks and Best Regards!

Binding property of a Panel header in Declarative Component

Hi,
I created a Custom Declarative component, which has a panel header, i wanted to expose the binding property of the panel header so that the users can add partial triggers to it programaticaly,
so i added a attribute of type RichPanelHeader, and used it in bindings of the panel header, but i am getting following error,
Unserializable value:RichPanelHeader[UIXFacesBeanImpl, id=dc_cnt_ph1] for key:PropertyKey[phBinding] in console,
and the value in bean is null.
the code used in Panel Header of Declarative component,
<af:panelHeader text="#{attrs.phScreenHdrTxt}" id="dc_cnt_ph1"
                      helpTopicId="#{attrs.phScreenHdrHelpTopicId}"
                      rendered="#{attrs.phScreenHdrRendered}"
                      inlineStyle="#{attrs.phScreenHdrInlineStyle}"
                      partialTriggers="#{attrs.phScreenHdrPartialTrigger}"
                      binding="#{attrs.phBinding}">
      <attribute>
          <attribute-name>phBinding</attribute-name>
          <attribute-class>oracle.adf.view.rich.component.rich.layout.RichPanelHeader</attribute-class>
        </attribute>   code used in the consumer app.
<app:Container id="c2" phScreenHdrTxt="tab1" phBinding="#{TestBean.panelHeader}">
    <f:facet name="body">
      <af:group id="g1">
        <af:outputText value="Tab1" id="ot1"/>
        <af:commandButton text="Refresh Panel Header" id="cb1"
                          actionListener="#{TestBean.refreshPh}"/>
      </af:group>
    </f:facet>
</app:Container>
public class TestBean implements Serializable{
private RichPanelHeader panelHeader;
public void refreshPh(ActionEvent actionEvent) {
    panelHeader.setText("Changed");
    AdfFacesContext.getCurrentInstance().addPartialTarget(panelHeader);
public void setPanelHeader(RichPanelHeader panelHeader) {
    this.panelHeader = panelHeader;
public RichPanelHeader getPanelHeader() {
    return panelHeader;
}is there any solution or way to expose the binding property of any component in a custom declarative component?

Hi,
as a last resort, try javax.faces.component.UIComponent as the component class. It seems that none of the UI components implements serializable. javax.faces.component.UIComponent is the JSF base class that they all use.
Let me know if this works. If not, I think I have another option that mayl do
Frank

Dynamic Declare Component cannot find property

We currently have one main page calls a DDC(Dynamic declarative component) page fragment to create/update a record in database. The main page pass in a key to DDC when it loads DDC. The DDC binds to a view object with bind variable (get value from the passed key and load data from table) and several LOV attributes. Once user clicks submit button in main page, we wish that all the fields displayed in DDC could be committed to a database table to save.
I use 11.1.1.5.
In order to assign the bind variable of VO, we wrote a method in Application Module and make it invoked as the first executable when the main page is loaded. The deployment is fine. However, the runtime always thrown some exception to complain it cannot find property definition like this:
####<Aug 15, 2011 6:32:24 PM CDT> <Warning> <oracle.adfinternal.view.faces.lifecycle.LifecycleImpl> <curmailts1-corp> <AdminServer> <[ACTIVE] ExecuteThread: '2' for queue: 'weblogic.kernel.Default (self-tuning)'> <<anonymous>> <> <6b1af60b3a40d50a:-6c52e935:131cfc2d522:-8000-000000000000024c> <1313451144494> <BEA-000000> <ADF_FACES-60098:Faces lifecycle receives unhandled exceptions in phase RENDER_RESPONSE 6
javax.el.PropertyNotFoundException: Target Unreachable, 'WorkDescription' returned null
     at com.sun.el.parser.AstValue.getTarget(Unknown Source)
     at com.sun.el.parser.AstValue.isReadOnly(Unknown Source)
     at com.sun.el.ValueExpressionImpl.isReadOnly(Unknown Source)
     at oracle.adfinternal.view.faces.renderkit.rich.EditableValueRenderer._getUncachedReadOnly(EditableValueRenderer.java:486)
     at oracle.adfinternal.view.faces.renderkit.rich.EditableValueRenderer.cacheReadOnly(EditableValueRenderer.java:416)
     at oracle.adfinternal.view.faces.renderkit.rich.LabeledInputRenderer.beforeEncode(LabeledInputRenderer.java:128)
     at org.apache.myfaces.trinidad.render.CoreRenderer.encodeEnd(CoreRenderer.java:334)
     at org.apache.myfaces.trinidad.component.UIXComponentBase.encodeEnd(UIXComponentBase.java:767)
     at javax.faces.component.UIComponent.encodeAll(UIComponent.java:937)
     at org.apache.myfaces.trinidad.render.CoreRenderer.encodeChild(CoreRenderer.java:399)
     at oracle.adf.view.rich.render.RichRenderer.encodeChild(RichRenderer.java:2633)
Questions: 1) Why my method in Application Module not called?
2) Whether DDC is a right solution for our use case? Any suggestion or sample are welcomed!
Thanks,

Hi,
I appreciate if you can show your code, but before that, make sure if you're following this tip below:
"Declarative Components are regular JSF components except that they are built as a composite out of existing ADF Faces components. Declarative components cannot have a PageDef file associated with it and instead use value or method attribute to communicate with the consuming page. When creating a declarative component, the attrs implicit object is defined that allow you to reference the component's exposed value attribute from ADF Faces components within.
An input text field contained in an declarative component may reference a value attribute "compValue" defined on the declarative component by using the following EL
#{attrs.compValue}
The declarative component compValue attribute then would us an EL reference like shown next to read/write values from or to the ADF binding layer:
#{bindings.attribute_name.inputValue}"
(Oracle ADF Code Corner)
Regards,

Add ViewObjects to Declarative Component

Hi All
I'm developing web application using jdeveloper 11.1.2.0
this is my use case.
In my jsf page I have to show the prevailing alerts to the user.
I have Alert_Log table and using a Poll, I'm viewing latest Alerts to the user.So that user will be automatically notified with the alerts.
My idea is to build this alert behavior as a declarative component so that other modules can also consume this without re-building alerts in each module.
How can I implement this behavior as a declarative component.
Please suggest me a solution for this. Any code samples are highly appreciated
Thanks
Padma

Its not a standard to add view objects to a declarative component , it generally has only UI components which dynamically get values for certain attributes.
You should ideally use Taskflows which can be reused as a region. The UI project which gets the business logic from ADF BC can be packaged as a ADF Jar and reused as mentioned below -
http://docs.oracle.com/cd/E24382_01/web.1112/e16182/reusing_components.htm#insertedID1
For Polling you can find examples similar to this - http://mjabr.wordpress.com/2011/05/06/refresh-part-of-the-page-periodically-using-poll-component/

Error while saving changes of declarative component to MDS

Hi,
Using ADF Faces 11gR1PS1.
I am trying to create a declarative component where user can close a panel box (not just minimize) by setting rendered property to false. It works fine.
Next I tried to save the attribute change to MDS so that user settings are preserved across sessions. However I got the following error:
<FilteredPersistenceChangeManager><_getQualifiedTagName> WebAppDesignContext is not available at application scope. Please ensure that your application is built as a 'Fusion Web Application (ADF)', and that taglib.jar and facesconfigmodel.jar are in class path.
<FilteredPersistenceChangeManager><_isChangeAllowedThroughPersistentChangeManager> Could not obtain tag name for the component being changed. Component ref: RichPanelBox[UIXFacesBeanImpl, id=dc_pb2]
<FilteredPersistenceChangeManager><_addDocumentChangeImpl> The DocumentChange is not configured to be allowed for the component: RichPanelBox[UIXFacesBeanImpl, id=dc_pb2]Following is the page code:
          <af:panelBox text="#{attrs.p2Header}" id="dc_pb2"
                       rendered="#{attrs.p2Header ne null and dashboardXBean.portletRendered.dc_pb2}"
                       showDisclosure="false">
            <af:componentDragSource discriminant="portlet"/>
            <f:facet name="toolbar">
              <af:commandImageLink id="p_cil2"
                                   icon="/images/removeselected_dwn.png"
                                   hoverIcon="/images/removeselected_ovr.png"
                                   depressedIcon="/images/removeselected_ena.png"
                                   actionListener="#{dashboardXBean.handleHideEvent}"
                                   rendered="#{attrs.sideNavRendered}">
                <f:attribute name="portletId" value="dc_pb2"/>
              </af:commandImageLink>
            </f:facet>
            <af:facetRef facetName="p2"/>
          </af:panelBox>Following is the code in the managed bean to persist changes:
    private void saveShowHideChange(String portletId, boolean isRendered) {
        FacesContext fc = FacesContext.getCurrentInstance();
        ChangeManager cm = RequestContext.getCurrentInstance().getChangeManager();
        //ChangeManager pcm = AdfFacesContext.getCurrentInstance().getPersistentChangeManager();
        UIComponent puc = boundedDashboard.findComponent(portletId);
        ComponentChange pcc = new AttributeComponentChange("rendered", Boolean.toString(isRendered));
        cm.addComponentChange(fc, puc, pcc);
    }I am not really sure if the above code needs to be in the component managed bean or in the bean of the page that uses this declarative component.
Any pointers are appreciated.
Thanks,
Husain

Thanks for the reply Frank.
For declarative components do we have separate renderer?
The [Developers Guide|http://download.oracle.com/docs/cd/E12839_01/web.1111/b31974/ad_persist.htm#BABBGCJA] didnt seem very helpful on this topic.
Can you point me to some reference material if available.
Thanks,
Husain

JDeveloper 11.1.2.3, ADF Faces: need declarative component idea for table

Some background:
I'm trying to create a reusable toolbar for standard af:table behavior, see screen shot
http://wesfang.files.wordpress.com/2013/05/dc.jpg
I got the idea from the from using documentation Frank has published in the past
1. http://www.oracle.com/technetwork/developer-tools/adf/learnmore/001-access-declarative-comp-attr-169113.pdf
2. Adding a new row programatically
The consuming subsystem's page passes in a "MyPageBean" which is a subclass of a "ArchBean" where all actionlistener operations are defined. The idea here is to minimize developer customization when using this component.
... <f:facet name="toolbar">             <af:toolbar id="t2">                 <mskcc:basicTransactionToolbar id="btt1" pageBean="#{MyPageBean}" tableId="t1"/>             </af:toolbar> </f:facet> ...
The table within the consuming page is by default dropped off as a "editable" table. The developer needs to further modify the "disable" attribute to true for all the input fields and command components within the table. I would like to remove this developer step and instead have it in an architectural component. All ideas are welcome.

Ok, finally got it working (sort of)
Using the following method as you suggested:
public void encodeChildren(FacesContext fc){
        try {
            super.encodeChildren(fc);
            RichTable table =
                (RichTable)ADFFacesUtil.findComponentInRoot((String)this.getAttributes().get("tableId"));
            lockUnlockTable(table); //method for toggling disable attribute for all command and input components
        } catch (IOException e) {
            e.printStackTrace();
}Now the strange problem I encountered is that the encode methods are not called if the declarative component is defined within a panelCollection's f:facet-toolbar like below:
<f:facet name="toolbar">
                    <mskcc:basicTransactionToolbar id="btt1" tableId="t1" pageBean="#{TestBean}"/>
</f:facet>Also the above code has to be manually created because the design time editor does not allow me to drop off the dc within the toolbar facet (even though the dc is a toolbar!)
Instead, If I move the dc outside the panelcollection, then the encode methods are invoked and the desired enable/disable behavior is correctly displayed.

JDeveloper 11.1.2.3, ADF Faces: declarative component does not support af:clientListener?

I am trying to create a declarative component with the following code:
<?xml version='1.0' encoding='UTF-8'?>
<af:componentDef xmlns:af="http://xmlns.oracle.com/adf/faces/rich" var="attrs" componentVar="comp" definition="private"
                 xmlns:afc="http://xmlns.oracle.com/adf/faces/rich/component">
    <af:xmlContent>
        <afc:component>
            <afc:display-name>DoubleClickTableDialogClientServerListener</afc:display-name>
            <afc:component-extension>
                <afc:component-tag-namespace>org.mskcc.crdb.common.declarativecomponent</afc:component-tag-namespace>
                <afc:component-taglib-uri>http://www.mskcc.org</afc:component-taglib-uri>
            </afc:component-extension>
        </afc:component>
            <af:clientAttribute name="serverListenerType" value="TableDoubleClickEvent"/>
            <af:clientListener method="handleTableDoubleClick" type="dblClick"/>
            <af:serverListener type="TableDoubleClickEvent"
                               method="#{EditAddDialogTemplateBean.handleTableDoubleClick}"/>
    </af:xmlContent>
</af:componentDef>
At runtime I recieve the following error:
javax.faces.view.facelets.FaceletException: ADF_FACES-60023:Component: DoubleClickTableDialogClientServerListenerComponent[oracle.adf.view.rich.component.fragment.UIXInclude$ContextualFacesBeanWrapper@7170a7, id=dctdcsl1] does not support client listeners.
at oracle.adfinternal.view.faces.facelets.rich.BaseClientListenerHandler.apply(BaseClientListenerHandler.java:53)
This component was intended to be dropped off within an af:table component. I would like to hear suggestions on workarounds, one other way I thought about was to create a code template for the three tags, however, the con to this approach is each developer would need to configure this template within jdeveloper. Ideas are appreciated.
Also a side question, how can I embed code properly with the new forum? [code] tag does not seem to work now.

Wes, can't help with the real question, but can tell you how to format code
Change to the advanced editor (top right over the editor field), then you get more options. The one you are looking for is behind the blue '>>'. Here you select the language you want to insert and you get nice code formatting and color.
Timo

Error in accessing attributes of a declarative component in BackinBeanScope

Hello,
I'm using JDeveloper 11.1.1.4.0.
For pagination we have created a declarative component. It's bean when in request scope works fine when the dec.comp. is used in page only once.
In order to use it multiple times in the same page, I changed the scope to BackingBeanScope. It works fine the first time bean's method gets called. However on the next request, I'm getting NullPointerException when it tries to access the dec. comp's attribute.
Why am I getting this error and how to correct it?
As an alternative, we can store the attribute value received first time in a hidden form field and retrieve it every subsequent time. But this would be my last alternative.
Appreciate a reason and a better way to resolve this.
Regards,
Amar

Hi,
Yes. The bean is declared in the dec. comp.
Following is the code in my bean's c'tor:
FacesContext fc                    = FacesContext.getCurrentInstance();
ELContext elctx                    = fc.getELContext();
ExpressionFactory elFactory    = fc.getApplication().getExpressionFactory();
ValueExpression valueExpr      = elFactory.createValueExpression(elctx, "#{component}", UIXDeclarativeComponent.class);
UIXDeclarativeComponent currDeclarativeComp            = (UIXDeclarativeComponent)   valueExpr.getValue(elctx);
String currVOObjectName                                         = currDeclarativeComp.getAttributes().get("VOObject").toString();"VOObject" is the attribute name for the dec. comp. It's getting correct value the first time. Every subsequent time,the last line throws null pointer exception.
Regards,
Amar

JSF Declarative Component

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