Iterate through all the pages using Navigation Context in webcenter portal

Sometimes we might need to iterate through all the pages in the custom or default navigation model in the webcenter portal. For example in order to create the custom header in the portal template etc..

The following code will iterate through all the pages in the navigation context.

<af:forEach var="node" varStatus="vs"
items="#{navigationContext.defaultNavigationModel.listModel['startNode=/, includeStartNode=false']}">
<af:commandLink id="pt_cl1" text="#{node.title}"
actionListener="#{navigationContext.processAction}"
 <f:attribute name="node" value="#{node}"/>
 <af:showPopupBehavior popupId="menuPopup"
align="afterStart"
triggerType="mouseOver"/>
</af:commandLink>
</af:forEach>


In the items section mention the navigation model to be iterated and the startNode specifies the path from root node where the iteration should start.

How to preserve the user session data during activation and passivation of application module in Oracle ADF?

User session specific information, like a queried user name or account data, can be saved in the Oracle ADF Business Components session using a call to getUserData() that returns a java.util.HashMap as a data store.

The user data map can be accessed from Java can be obtained from the user session using the below method call

getDBTransaction().getSession().getUserData()

However, the user specific information in the userData HashMap is not persisted by default when activation / passivation occurs for application modules that have Application Module pooling enabled, which means that custom session data may be lost between requests.

What we need to to is to passivate the session user data together with the other state data stored by the framework and load it back when the AM is requested the next time (when it gets activated again). To do this we have to overwrite the following two methods in the AMImpl class of ADF application module.




@Override protected void activateState(Element aElement) { super.activateState(aElement); if (true) { Hashtable lData = getSession().getUserData(); if (aElement != null) { // 1. Search the element for any <PrivData> elements NodeList nl = aElement.getElementsByTagName(PRIVATEDATA); if (nl != null) { // 2. If any found, loop over the nodes found for (int i = 0, length = nl.getLength(); i < length; i++) { // 3. Get first child node of the <PrivData> element Node child = nl.item(i).getFirstChild(); if (child != null) { // 4. Set the data value to the user data hashmap String lDataString = child.getNodeValue(); String[] lSplitkeyval = lDataString.split(";"); for (int ii = 0; ii < lSplitkeyval.length; ii++) { mLogger.fine("..." + lSplitkeyval[ii]); String[] lSplit = lSplitkeyval[ii].split("="); lData.put(lSplit[0], lSplit[1]); } break; } } } } } }

@Override

protected void passivateState(Document aDocument, Element aElement) {

super.passivateState(aDocument, aElement); if (true) { // 1. Retrieve the value of the user data to save and build a string representation Session lSession = getSession(); Hashtable lData = lSession.getUserData(); String lDataString = ""; Set<String> keyset = lData.keySet(); if (!keyset.isEmpty()) { Iterator<String> keys = keyset.iterator(); while (keys.hasNext()) { String key = keys.next(); mLogger.fine("..." + key + "=" + lData.get(key)); lDataString += key + "=" + lData.get(key) + ";"; } } // 2. Create an XML element to contain the value Node node = aDocument.createElement(PRIVATEDATA); // 3. Create an XML text node to represent the value Node cNode = aDocument.createTextNode(lDataString); // 4. Append the text node as a child of the element node.appendChild(cNode); // 5. Append the element to the parent element passed in aElement.appendChild(node); } }

How to call the valueChangeListener of af:inputText from the java script in Oracle ADF?

Step1

Let us say our value change listener is as follows

import javax.faces.context.FacesContext;
import javax.faces.application.FacesMessage;

public void onChangeCompanyName(ValueChangeEvent valueChangeEvent) {
    FacesMessage msg = new FacesMessage("In the value change listener of company");
    FacesContext context = FacesContext.getCurrentInstance();
    context.addMessage(null, msg);
}


Step2

Our javascript should be

function callValueChangeEvent(evt) {
      //Method to get component using id (here inputText)
      var field = AdfPage.PAGE.findComponentByAbsoluteId('it1');

      //Change(set) field's value
      field.setValue('I am JavaScript text');

      //Get New changed value
      var newVal = field.getValue();

      //Queue ValueChangeEvent (component,oldValue,newValue,autoSubmit)
      AdfValueChangeEvent.queue(field, null, newVal, false);
}

Implement Primary Key Population for ADF BC based on SQL server

We can auto populate the primary key attribute in many ways for an ADF BC Entity Object based on Oracle Database but for the Entity Objects generated using SQL Server the following proceedure should be used

Step 1. Create an auxiliary database table
Create an auxiliary database table that will be used to generate the primary key values as shown below.

CREATE TABLE [dbo].[S_ROW_ID](

[start_id] [numeric](38, 0) NULL,

[next_id] [numeric](38, 0) NULL,

[MAX_ID] [numeric](38, 0) NULL,

[AUX_START_ID] [numeric](38, 0) NULL,

[AUX_MAX_ID] [numeric](38, 0) NULL

)

Step 2. Create the database Connection ROWIDAM_DB
In your application, create a database connection named ROWIDAM_DB that points to the database containing your S_ROW_ID table.
Note: It is mandatory to use the same connection name

Step 3. Configure the Primary Key Attributes 
Set the primary key attribute value to oracle.jbo.server.uniqueid.UniqueIdHelper.getNextId() in the Entity Object as shown below

Step 4. Modify the adf-config.xml
Though we create the connection to the sql server, we need to modify the default preferences in adf-config.xml as shown below. 

ADF binding classes explained

ADFBindingContext 
  - Life instance of the adfc-config.xml file
  - Exposes the security Context, Check permissions on an object
  - Exposes MDS Object Session

DCBindingContainer
  - Implmentation of the binding container interface
  - Represents the page definition file at runtime
  - At Runtime Binding is enclosed in a java object, that is this DcBindingContainer
  - All executable bindings, variables, can be obtained
  - #{binding}

BindingContext
  - Life representation of databindings.cpx file, which is the registry of pagedef files
  - It contains the reference to the datacontrols used
  - We can access and manipulate the data controls

DCIteratorBinding
  - browse through the collection of data
  - insert/update/delete data from data collection
  - Iterator binding links to the data source
  - All the operation on the data are internally performed on this DCIteratorBinding

OperationBinding
  - Call a custom method
  - Call the binding method

Good blog for oracle SOA suite sample

https://java.net/projects/oraclesoasuite11g/pages/Home

How to create a UCM connection from JDeveloper?

For many development purposes we need to connect to the content repository and retrieve the content at design time.

Step 1:

Select the Content Repository from the Application Resources -> Connections -> New Connection -> Content Repository

Step 2:

Select Repository Type: Oracle Content Server

Enter the RIDC scoket type, Server Host name, content server port and leave all others as they are.

Give the Credentials if you have them  else uncheck "Specify login credentials..." and then Click Ok

Step 3:

Open the connection in the application resources and browse through the files and folders

Execute a particular java code on every page load in ADF

http://www.baigzeeshan.com/2011/05/how-to-run-java-code-on-every-page-load.html

Execute a default command button on clicking 'Enter' anywhere in the af:form in Oracle ADF?

This can be achieved by configuring the defaultCommand property of the af:form tag in the jsff page fragment or jspx page document in Oracle ADF.

We have to configure defaultCommand with the id attribute of the command button inside the form whose action should be invoked by default when the enter key is pressed with focus inside the form. If defaultCommand is not specified, no action is invoked when the enter key is pressed with focus inside the form.

For example:

<af:form id="f1" defaultCommand="pt1:cb4">

Get the Application Module instance in backing bean from Data Control in Oracle ADF?

Sometimes we might need the view object instance or the application module instance in the manged bean in the view controller project. The following code snippet is a sample to do the same

import oracle.adf.model.BindingContext;
import oracle.adf.model.binding.DCDataControl;
import oracle.jbo.ApplicationModule;

public static ApplicationModule getAMOfDataControl(String name){
    BindingContext bindingContext = BindingContext.getCurrent();
    ApplicationModule appModule = null;
    if (bindingContext != null) {
        DCDataControl dc = bindingContext.findDataControl(name);
        if (dc != null) {
            appModule = (ApplicationModule)dc.getDataProvider();
        }
    }
    return appModule;
}

Once we get the application module, we can get the required View Object instance.