Declarative component attribute binding

Hi,
I'm sure this is an easy one, but I can't find the answer on the forum.
using JDev 11.1.1.3
I have created a declarative component with text fields bound to attributes as described in the ADF Code Corner, created the ADF Component lib etc. When I use this component in a task flow in another project, I set the properties to fields in my managed bean which is declared in the task flow, however on submission I find that my text input fields (RichInputText objects) are null i.e. the binding didn't work. I'm not sure if I should be creating 'attribute bindings' in the page definition, or if teh managed bean should be declared in the ADF component library, or if this should just work and I have done something silly.
The examples usually bind the exposed attribute properties to a data control field, I'm not sure how it works for a managed bean, can anyone point me in the right direction?
thanks in advance
steve

Hi,
it should work for managed beans as well. If your managed bean exposes a setter/getter pair, then this can be bound to the declarative component attribute binding. However, keep in mind that if the managed bean is in request scope, the bean is refreshed and this re-setted for each request. So the bean should have a scope of at least viewScope
Frank

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Hi,
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}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.
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Error in accessing attributes of a declarative component in BackinBeanScope

Hello,
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ADF:LOV declarative component not working inside table component.

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Harish

Hi Frank,
below is my actual requirement and the solution i tried till now.
I have a table and it has two columns let’s say “Columns” and “Values”. The first column i.e. “Columns” will be a dropdown and it will have predefined values, the other column “Values” will be a “List of value” control or similar kind of control in which the user can search and select multiple values from the popup list, and that list should dynamically bounded to the first column selected value.
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shortDesc="#{bindings.Columns.hints.tooltip}"
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LovModel="#{bindings.Value.listOfValuesModel}"
id="oms2"/>
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The above code perfectly fine as I used it inside the “Form layout” and with the parameters passed as KeyValue="#{bindings.Value.inputValue}"
LovModel="#{bindings.Value.listOfValuesModel}"
The problem I am facing:
The actual problem comes when I use this control inside the table which I required in my implementation.
I called the declarative LOV control as shown below inside the table as I used to call the basic “Input List of value” control which works fine inside the table.
. <af:column sortProperty="Value" sortable="false"
headerText="#{bindings.OpPlanning1.hints.Value.label}"
id="c1" width="133">
<mc:OraMultiSelect KeyValue="#{row.bindings.Value.inputValue}"
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Above code doesn’t works fine when I select value from the “Column” dropdown it displays the corresponding list model in the pop up but not able to retrieve the value of the list in the popup .
If I pass the parameters as
. <af:column sortProperty="Value" sortable="false"
headerText="#{bindings.OpPlanning1.hints.Value.label}"
id="c1" width="133">
<mc:OraMultiSelect KeyValue="#{bindings.Value.inputValue}" --instead of ="#{row.bindings.Value.inputValue}"
LovModel="#{bindings.Value.listOfValuesModel}"--}" --instead of ="#{row.bindings.Value.inputValue}"
id="oms1"/>
</af:column>
It works fine for the first row.The subsequent rows refers the value selected in the first row dropdown.
Thanks For the help,
Harish
Edited by: 886523 on Nov 3, 2011 8:04 AM

Declarative component stops working after taskflow-call-in-popup

Hi!
JDev 11.1.1.3.0
I need a component, much like the commandToolbarButton, but I have the requirement that the user should still be able to select from the popup even if the button is disabled.
So I created a declarative component, combining two buttons and a popup with a menu in a panelGroupLayout. The one button, the mainButton, actually executes the action, the other (with an icon only) opens a menu in a popup.
The user selects an item from the popup, the component then PPRs the main button in code to display the user's choice in the main buttons text.
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    </af:panelGroupLayout>That works fine ... until the user opens a taskflow in a popup.
I have a bounded taskflow, jspx-based, opened by a button with an action that navigates to a taskflow-call activity in a modal dialog. The user opens the taskflow, does what needs to be done, then closes the dialog.
Still fine.
But, after the dialog has closed, when the user selects an item from the popup menu of my declarative component, I suddenly get an NPE:
<26.04.2011 19:07 Uhr MESZ> <Notice> <Stdout> <BEA-000000> <<RegistrationConfigurator><handleError> Server Exception during PPR, #1
java.lang.NullPointerException: UIComponent is null
     at org.apache.myfaces.trinidad.component.UIXComponent.addPartialTarget(UIXComponent.java:498)
     at org.apache.myfaces.trinidadinternal.context.RequestContextImpl.addPartialTarget(RequestContextImpl.java:513)
     at com.ge.med.web.components.button.CommandComboButton.refreshMainButton(CommandComboButton.java:213)
     at com.ge.med.web.components.button.CommandComboButton.setSelectedCommand(CommandComboButton.java:177)
     at com.ge.med.web.components.button.CommandComboButton.commandItemPressed(CommandComboButton.java:243)
     at com.ge.med.web.components.button.CommandComboButton.processAction(CommandComboButton.java:129)
     at javax.faces.event.ActionEvent.processListener(ActionEvent.java:88)To track the problem down, I have pointed the binding attribute of the declarative component to a property in a session-scoped bean, to see what the component looks like that is set, what the children and grand children are, and who the parent is.
This prints:
<26.04.2011 19:07 Uhr MESZ> <Notice> <Stdout> <BEA-000000> <Setter called: DemoComboButtonComponent[oracle.adf.view.rich.component.fragment.UIXInclude$ContextualFacesBeanWrapper@1762a87, id=demoAdd]>
<26.04.2011 19:07 Uhr MESZ> <Notice> <Stdout> <BEA-000000> <Parent: RichPanelGroupLayout[UIXFacesBeanImpl, id=cbll1]>
<26.04.2011 19:07 Uhr MESZ> <Notice> <Stdout> <BEA-000000> <Children: [RichPanelGroupLayout[UIXFacesBeanImpl, id=demoAdd_layout]]>
<26.04.2011 19:07 Uhr MESZ> <Notice> <Stdout> <BEA-000000> <Grand kids: [RichCommandToolbarButton[UIXFacesBeanImpl, id=mainButton], RichCommandToolbarButton[UIXFacesBeanImpl, id=menuButton], RichPopup[UIXFacesBeanImpl, id=commandPopup]]> That's fine. But when I add the same debug code to my setSelectedCommand() method (which is called when the user selects an item from the popup's menu), I get:
<26.04.2011 19:07 Uhr MESZ> <Notice> <Stdout> <BEA-000000> <I am: DemoComboButtonComponent[oracle.adf.view.rich.component.fragment.UIXInclude$ContextualFacesBeanWrapper@ba2b1c, id=demoAdd]>
<26.04.2011 19:07 Uhr MESZ> <Notice> <Stdout> <BEA-000000> <My Parent: null>
<26.04.2011 19:07 Uhr MESZ> <Notice> <Stdout> <BEA-000000> <My Children: []> The empty children property explains the NPE. This NPE only happens when the user selects an item from the popup after the dialog has closed.
Debugging showed that the new DemoComboButtonComponent is created during the restoration of (tree) state after the closing of the modal dialog. But why has it no parent? And where are the kids?
Could the binding of the declaratice component to a session-scoped bean be the problem? Somehow prevent the state mechanism from re-building the UI component tree correctly?
I am at the end of my wits.
Any help is appreciated!
Sascha

Hi Frank,
no, not yet. I had the feeling that it's me who is doing something wrong. Declarative components are pretty common, right? So are taskflow calls in dialogs. Someone should have noticed if there's a bug in the framework, right?!
But I changed the scope of the bean (to backing scope and request scope) that the declarative component is bound to and I still get the error.
I will try to create a simpler test case, and if I can reproduce with that, then I will file a bug, if there's no one that can explain the phenomenon.
Sascha

Declarative Components field binding

Can we bind a View Object to declarative component? I want to have a declarative component and whenever that declarative component would be used, it would be used with the same view object so i feel it extra work to bind all the attributes to view object's attributes whenever declarative component has to use. I want t create the component (declarative) and get bind it with a view object somehow and use it without every time going through to bind to view object or bind individual fields to view object's attributes. Any suggestions??
Edited by: Mamoona on Jun 24, 2011 4:56 PM

Hi,
this is not what declarative components are for. Think of declarative components as standard JSF components, which you would not build tied to a specific model. If you need to wire a declarative component to a View Object then you expose an attribute on the declarative component that the consumer of the component the uses EL on to bind it e.g. to the ADF binding layer
Frank

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:
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As this kind of method attribute
<method-attribute>
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submitRegistrationForm
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<method-signature>
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<required>
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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
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Is it possible to call this to my AM?
Thanks.

Dynamic Declarative Component managed bean returned null

Hi,
In a project from an application a DDC component is defined. This component uses a managed/backing bean with view scope.
Using this component inside this project is working fine. This component should be used in other view controller projects, and here where the problems are.
This project(let's call it Common) is deployed as ADF Library jar, and used in the other V-C projects.
The big problem is that the managed bean defined for the logic of this component is not 'reacheable'.
(Another problem is that the attribute value is not seen as its EL expression but as string, for this i found a workaround.)
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<managed-bean id="__4">
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                              value="#{viewScope.ExtendedShuttle.allModel}"
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javax.el.PropertyNotFoundException: Target Unreachable, 'ExtendedShuttle' returned null
This exception is throw on com.sun.faces.application.ApplicationImpl.createComponent when *#{viewScope.ExtendedShuttle.allItemsTable}* is evaluated.
Caused By: javax.faces.FacesException: javax.el.PropertyNotFoundException: Target Unreachable, 'ExtendedShuttle' returned null
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     at javax.faces.webapp.UIComponentClassicTagBase.createFacet(UIComponentClassicTagBase.java:510)
     at javax.faces.webapp.UIComponentClassicTagBase.findComponent(UIComponentClassicTagBase.java:661)
     at javax.faces.webapp.UIComponentClassicTagBase.doStartTag(UIComponentClassicTagBase.java:1142)
     at org.apache.myfaces.trinidad.webapp.UIXComponentELTag.doStartTag(UIXComponentELTag.java:70)
     at oracle.adfinternal.view.faces.taglib.UIXTableTag.doStartTag(UIXTableTag.java:41)
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     at oracle.jsp.runtime.tree.OracleJspBodyTagNode.executeHandler(OracleJspBodyTagNode.java:50)
Caused By: javax.faces.FacesException: javax.el.PropertyNotFoundException: Target Unreachable, 'ExtendedShuttle' returned null
     at com.sun.faces.application.ApplicationImpl.createComponent(ApplicationImpl.java:262)
     at javax.faces.webapp.UIComponentELTag.createComponent(UIComponentELTag.java:222)
     at javax.faces.webapp.UIComponentClassicTagBase.createFacet(UIComponentClassicTagBase.java:510)
     at javax.faces.webapp.UIComponentClassicTagBase.findComponent(UIComponentClassicTagBase.java:661)
     at javax.faces.webapp.UIComponentClassicTagBase.doStartTag(UIComponentClassicTagBase.java:1142)
     at org.apache.myfaces.trinidad.webapp.UIXComponentELTag.doStartTag(UIXComponentELTag.java:70)
     at oracle.adfinternal.view.faces.taglib.UIXTableTag.doStartTag(UIXTableTag.java:41)
     at oracle.adfinternal.view.faces.unified.taglib.data.UnifiedTableTag.doStartTag(UnifiedTableTag.java:50)
     at oracle.jsp.runtime.tree.OracleJspBodyTagNode.executeHandler(OracleJspBodyTagNode.java:50)
Caused by: javax.el.PropertyNotFoundException: Target Unreachable, 'ExtendedShuttle' returned null
     at com.sun.el.parser.AstValue.getTarget(AstValue.java:88)
     at com.sun.el.parser.AstValue.setValue(AstValue.java:133)
     at com.sun.el.ValueExpressionImpl.setValue(ValueExpressionImpl.java:255)
     at com.sun.faces.application.ApplicationImpl.createComponent(ApplicationImpl.java:259)
Can you help figure it out, why is not working or why the managed bean is not visible in other projects but only in the one where the component is defined?
Thank you for your time,
Bogdan
ps: how can i format the source code, on this fourm?

Hi Frank,
Thank you for the answer.
I must say i'm quite new with ADF technology and maybe my questions are silly.
Here is a Quote from "Oracle Fusion Developer Guide - Building Rich Internet Application with Oracle ADF" by Frank Nimphius and Lynn Munsinger Chapter 15 page 498:
"You build dynamic declarative components *instead* of tag library based declarative components, if component resuse is required *only within the application* that has the component defined."
Maybe i misunderstand the meaning of application from this sentence, but i need this component in several ViewController projects from only one application (ADF application).
Tag lib declarative component I would not like to have, since the (automtically) build process is not my responsability and it will take some time till is pinpointed, but still is a last resort.
Anyway two things are strange:
1. Why the component is still available in other projects(and the beans not)?
2. Why when a binding variable (for example: of type FaceCtrlHierBinding) has the correct type in the declarative project and in the order projects is of type String and its value is the variable name?
Example:
<af:declarativeComponent ...
AllItems="#{bindings.Action}"
In project where the component is declared its value is an instance of FacesCtrlHierBinding and in the rest of the projects is of type String with value "Action".
Once again thank you a lot,
Bogdan

Dynamic declarative component won't work properly within table row

Hi guys,
I built a dynamic declarative component which basically consists of an af:inputText surrounded by a af:panelLabelAndMessage tag.
The component works fine until I put it inside a table column, then none of the attribute values get set.
The problem seems to be related to the table row binding #{row.binding.Name.inputValue} , if I use a regular binding #{binding.Name.inputValue} it works ok.
The declarative components attribute is defined as
<attribute>
    <attribute-name>kbez</attribute-name>
    <attribute-class>java.lang.Object</attribute-class>
</attribute>and is used as the inputText's value attribute
<af:componentDef var="attrs" componentVar="component">
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<af:declarativeComponent viewId="/WEB-INF/ikb.adf.kreda.basis/mitarbeitersuche/ddc/mitarbeiterLOV.jsff"
                         id="ddc1" label="Mitarbeiter"
                         kbez="#{row.bindings.Kbez.inputValue}"/>My JDeveloper version is 11.1.1.5.
Am I doing it wrong or is this a bug?
Any help is appreciated.
Thank you,
Achim
Edited by: Achim Rosenfeld on Mar 8, 2013 8:41 AM

Hi,
+#{row.binding.Name.inputValue} , if I use a regular binding #{binding.Name.inputValue} it works ok.+
Don't think that #{binding.Name.inputValue} works okay in a table because it doesn't stamp the component per row. Actually I don't know if we support dynamic declarative components in a stamped environment (table). I know though that we don't for taglib declarative components in this context.
Reason why it doesn't work: Tables are stamped at runtime, which means that for better performance, only the generated HTML is reused for each row with different data - not the component. Your component requires itself to be re-created for each row so it can re-read the attribute again. This is not the case in a stameped environment
Solution: For your particular use case I don't think that a dynamic declarative component is needed as you can add the construct (af:inputText surrounded by a af:panelLabelAndMessage) directly into an af:column tag. The declarative component makes more sense for reuse of layout areas (e.g. custom tabs) that are iterated within an af:forEach (in which case instances of the decalarative components would be created).
Bottom line: tables stamp their components and as such the attribute property exposed on a DDC doesn't seem to be called for each row, which is by design. This can be considered a bug if there is a use case demanding for a DDC in a table. If this is a requirement for you (and you can't directly add the components to the af:column tag) feel free to file this as a service request with customer support (required a support contract) so development can have a look if the requirement is feasible to implement.
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,

ADF Faces Declarative Component onLoad event call Backing Bean Method

Hello.
We are trying to implement a declarative component, that will be used as Flex Fields for our application, ie, the components will be created dynamically through a database configuration, and who is responsible for organizing and creating the components, is the declarative components, and its own backing bean.
The declarative component, will receive a List of custom components, and with this list it is possible to create the components dynamically. We want the components to be created as soon as the page is loaded. The developer could place this declarative component in any region of his page, and even in another tab if he wishes. The problem is, that we cannot register a load event in the declarative component, since it doesn't have a document Object, to call the declarative components backing bean method that is responsible for creating components.
How could we simulate the onLoad (of the declarative components) so that the backing bean method (responsible for creating component, and putting it in the view tree) could be called ?
I've tried with a RENDER_RESPONSE phaseListener, but the beforePhase has no objects in the tree, and the afterPhase has already rendered to the client.
Any ideas on how to achieve this ?
Thanks a lot.
Regards,
John

Hi Frank, thanks for the response.
I'm curious about the dynamic declarative component. Any place I could check it out ?
Back to my scenario. I'll try to be more clear to what we need!
We have to have dynamic creation of components, based on a database configuration. This will allow our customers to have custom flex fields, without the need of us developing custom pages for each customer.
One solution we are trying out, is the declarative component. Why ? Because the developer (when developing the page), knows that this specific page, is possible of customization by the client (custom flex fields). With this, the developer would choose where on his page the custom flex fields will be placed. Note that at this point (design time), no component (input, buttrons, etc) is created. The idea of the declarative component, is just so the Developer knows where he wants the custom fields placed in his page (a tab, below the form fields, in a another panel group, and so on). The declarative component, has only a container, PanelFormLayout, and no other component.
What we want, is a way of calling our managed bean (the managed bean of the declarative component, that now I did configure it in the adfc-config.xml file , thanks for the tip) method, that's responsible for creating the custom components. The declarative component, receives a list of all the custom fields that needs to be created, at design time, through an attribute. The developer is responsible for setting this list when he drags the declarative component on his page.
Now that I've put the declarative components managed bean in the adfc-config.xml file, the @PostConstruct is called correctly, but I still have a problem. At this moment (postContstruct call), my component PanelFormLayout (that is binded to the managed bean), is null. So I cannot add any component to the PanelFormLayout.
Am I way out of line here Frank ?
Really appreciate your comments.
Thanks a lot.
John

Declarative component attribute binding

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