Add/Remove af:messages on a component using javascript

In one of my project, I had a requirement to add & remove af:messages from input components. In this post, I will show the javascript code used to achieve it.
 
For adding af:message to an input component using java script, use the following code.

function customJSMethod(evt){
       var source = evt.getSource();
       var inputComponent = source.findComponent('inputcompId’);
       var message = “Valiation Failing…”;...//Custom message to be added on component.
       AdfPage.PAGE.addMessage(inputComponent.getClientId(), new AdfFacesMessage(AdfFacesMessage.TYPE_ERROR, null, message));
       AdfPage.PAGE.showMessages(inputComponent.getClientId());
}

For removing af:message from an input component using java script, use the following code.

function customJSMethod(evt){
    var source = evt.getSource();
    var inputComponent = source.findComponent('inputcompId’);....
    AdfPage.PAGE. clearMessages (inputComponent.getClientId());
    AdfPage.PAGE.showMessages(null);
}

Issue with groovy expresssion in ADF 12.1.3

I was trying to define a groovy expression for creating a sequence for one of my entity object attribute.

(new oracle.jbo.server.SequenceImpl("SEQ_NAME", adf.object.getDBTransaction())).getSequenceNumber()

But while trying to create a new record using BC Tester I am getting the following exception.

General error during semantic analysis: JBO-25152: Calling the constructor for class oracle.jbo.server.SequenceImpl is not permitted.

oracle.jbo.ExprSecurityException: JBO-25152: Calling the constructor for class oracle.jbo.server.SequenceImpl is not permitted.

After debugging for some time, I have found a resolution for this. While defining a groovy expression for an entity object attribute, the source code is generated as below.

<TransientExpression trustMode="untrusted"><![CDATA[(new oracle.jbo.server.SequenceImpl("SEQ_NAME", adf.object.getDBTransaction())).getSequenceNumber()]]></TransientExpression>

In order to resolve the above issue we need to make the trustMode attribute to trusted or remove the attribute trustMode as the default value for this attribute is trusted. 

<TransientExpression><![CDATA[(new oracle.jbo.server.SequenceImpl("SEQ_NAME", adf.object.getDBTransaction())).getSequenceNumber()]]></TransientExpression>

  

Clearing cookies on browser close

In one of my project I had a requirement to clear all the session cookies set in my application on browser close. After exploring for a while I found out a simple configuration in WebLogic Server-specific deployment descriptor, weblogic.xml which will clear all the cookies on browser close. 

In session-descriptor section of weblogic.xml, there is a parameter, cookie-max-age-secs which sets the life span of the session cookie in seconds, after which it expires on the client. Setting this value to -1 expires the cookie on browser close.  Set this value as mentioned below.

How to install Apache Ant and run build script from command prompt

In this post, I will explain you the steps to install Apache Ant and run ant build script from command prompt.

Following are the steps to be followed to install Apache Ant.

1. Download Apache Ant's zip file from Apache Ant official website.

For example : apache-ant-1.9.5-bin.zip, unzip it to the folder where you want to store Apache Ant.

2. Make sure JDK is installed. And configure JAVA_HOME as environmental variable.

3. Configure ANT_HOME environmental variable as shown. In my case C:\apache-ant-1.9.5 stores Apache Ant.

 

4.  Set ANT_Home's path.

After the above steps, when you run the command ant -v from command prompt it should show you the following details:

 which means ant is setup successfully.

Follow the steps to run build script from command prompt.

1. Open command prompt and run the following command.

ant -f C:\Umesh\Code\Device.com\Portal\build.xml build 

Here C:\Umesh\Code\Device.com\Portal\ is the folder location where my build script exists.

2. Once you hit the above command, the script start executing as shown:

Once the script is run successfully, it will display confirmation message in command prompt.

How to generate HTML Javadocs using Jdeveloper

In this blog, I will explain the steps to create HTML Javadocs using Jdeveloper.

First add Javadocs for all the classes and its methods using  /** */.

Then follow the below steps to create HTML Javadocs.

1. Select the folder/file for which you want to create HTML Javadocs.

2. Go to Build menu and select Javadoc com.test to create HTML Javadoc.

3. Once the Javadoc is created, you should see the below message in the logs.

4. To view generated Javadoc for a specific class, Go to Java Doc in Navigate menu and search for the file.

 

5. Alternatively, you can go to the folder where Javadoc HTMLs are created.
In my case: C:\Jdeveloper\mywork\TestJavaDocApp\Javadoc\javadoc.
Click on index.html to view HTML javadocs.

Use case of scrollComponentIntoViewBehavior

The scrollComponentIntoViewBehavior tag is a declarative way to have a command component  scroll a component into view and optionally set focus on it. scrollComponentIntoViewBehavior.

In this post, I will explain a use case of scrollComponentIntoViewBehavior tag to scroll and set focus on a component in a page.

UseCase:

In a webcenter application, if you have a menu defined as mentioned below.

where all the selections(i.e Calendar, Choose Date etc.) are mapped to the same page i,e if a user selects any of these options, he/she is navigated to the same page but with the selected option/section scrolled and focused into. It is similar to anchor tag for jumping on a specific location of a page.

Steps implemented are:

1. Create a Webcenter Portal Framework Application.

2.Create a new jspx page. (eg: news.jspx). In this page, define the various components to set focus on based on selection in navigation menu.

3. Define the navigation menu as mentioned above.

• Go to default-navigation-model & delete the default pageHierarchy
• Click on Add new node and select link from various options. Modify Id, Type, URL, URL Attributes for the Home page as shown below.
  
  
  
  
  
• Add another node of type link below Home as Calendar. Set the Id, Type, URL, URL Attributes for the new page. Additionally set a URL parameter for this node as shown below.
  
  
   
  
  
  Here the url parameter section is assigned value: pt1:pb1 which is clientId of the component to set focus on when Calendar is chosen from the navigation menu.
• Repeat the above steps to add other nodes(Choose Date & Choose Color).

4. Define a command button with visible property set to false. Add scrollComponentIntoViewBehavior inside it as shown below.

Here the componentId property of scrollComponentIntoViewBehavior is set to #{param.section}.

5. Define a client listener method scrollToComponent on page Load. The java script code is

function scrollToComponent(loadEvent) {
     var id = "pt1:command1";
     var t = document.getElementById(id);
     t.click();
}

when the user selects any option(i.e Calendar, Choose Date) from the navigation menu, the page news.jspx is loaded which triggers the above java script and in turn clicks the command button and invokes scrollComponentIntoViewBehavior tag. 

Based on the url parameter set in the default-navigation-model the navigation jumps to the particular section of the page.

Sample workspace:

Download the sample workspace from here.

Hide move all/remove all buttons from SelectManyShuttle component

In one of the earlier post, I explained how to implement SelectManyShuttle component. In this post, I will show how to hide move all/remove all buttons using skinning.

Generally SelectManyShuttle component looks like:

The skinning to hide move all/remove all buttons is:

af|selectManyShuttle::moveall-horizontal,
af|selectManyShuttle::moveall-vertical,
af|selectManyShuttle::removeall-horizontal,
af|selectManyShuttle::removeall-vertical{display:none}

The SelectManyShuttle component after skinning: