Using Contextual Event in Oracle ADF (Region Communication)

Contextual event ,in simple terms is a way to communicate between taskflows.

Sometimes we have taskflow open in a region and have to get some values from that taskflow .

This scenario can be achieved by contextual event.

 

Contextual Event have two parts-

1. Publisher Event (Producer)- As button or any component that can raise event 
2. Handler Event (Customer)- that listens and process event published by producer

This tutorial is based on example developed on default HR schema of Oracle DB 11g

I have created two application and called first one in secod application as region.

• Create first application using Department table of HR schema and drag Department Name on page fragment, now create publisher event (follow steps) for Department Name .
• Select Department Name field in structure window and go to property Inspector select ContextualEvent
  click on green add icon and select event type and name for publisher event

 

• Select field value from Iterator Binding
  
• here you are done with publisher event or producer create a jar of this application in order to use it in second application.
• Now start Second Application that will handle and process this event, create a page and put an output text and set its value from managed bean
  
  
  
  
  
  

• Now create a event handler class to process published event and to make it available to page binding level , we have to create DataControl for this class.
  
  
  
  
  
  
  
  
• Right click on event class and Click on CreateDataControl.
• Now add this method binding to page so that it can be accessible from page binding

• Now drag and drop taskflow from jar library on page as region by this published event will also be available to page
  

  
• Now go to page binding and goto ContextualEvents tab ,click on subscribers tab and click on add icon this will open a popup window ,click on search button , it will show available publisher event, now select event and goto handler search option and select function that you have previously added in page binding
• Give consumer parameter name same as event handler function

 

Now Run your Application - Download ADF Sample Application

Phone Number custom validation using Regular Expression in ADF and Java

Regular Expression (REGEX) is the best method to validate phone number. emailId, name in Java.
Here I have written this validation code for phone number using Regular Expression and Java code to use this in an Oracle ADF Application.

public void phoneNoValidator(FacesContext facesContext, UIComponent uIComponent, Object object) {
        String msg2 = "";
        if (object != null) {
            String phnNo = object.toString();
            int openB = 0;
            int closeB = 0;
            boolean closeFg = false;
            char[] xx = phnNo.toCharArray();
            for (char c : xx) {
                if (c == '(') {
                    openB = openB + 1;
                } else if (c == ')') {
                    closeB = closeB + 1;
                }

                if (closeB > openB) {
                    closeFg = true; //closed brackets will not be more than open brackets at any given time.
                }
            }
            //if openB=0 then no. of closing and opening brackets equal || opening bracket must always come before closing brackets
            //closing brackets must not come before first occurrence of openning bracket
            if (openB != closeB || closeFg == true || (phnNo.lastIndexOf("(") > phnNo.lastIndexOf(")")) ||
                (phnNo.indexOf(")") < phnNo.indexOf("("))) {
                msg2 = "Brackets not closed properly.";
                FacesMessage message2 = new FacesMessage(msg2);
                message2.setSeverity(FacesMessage.SEVERITY_ERROR);
                throw new ValidatorException(message2);
            }
            if (phnNo.contains("()")) {
                msg2 = "Empty Brackets are not allowed.";
                FacesMessage message2 = new FacesMessage(msg2);
                message2.setSeverity(FacesMessage.SEVERITY_ERROR);
                throw new ValidatorException(message2);
            }
            if (phnNo.contains("(.") || phnNo.contains("(-") || phnNo.contains("-)")) {
                msg2 = "Invalid Phone Number.Check content inside brackets.";
                FacesMessage message2 = new FacesMessage(msg2);
                message2.setSeverity(FacesMessage.SEVERITY_ERROR);
                throw new ValidatorException(message2);
            }

            openB = 0;
            closeB = 0;
            closeFg = false;
            //check for valid language name.Allowed- brackets,dots,hyphen

            String expression = "([0-9\\-\\+\\(\\)]+)";
            CharSequence inputStr = phnNo;
            Pattern pattern = Pattern.compile(expression);
            Matcher matcher = pattern.matcher(inputStr);
            String error = "Invalid Phone Number";
            System.out.println("Index of plus is--->" + phnNo.lastIndexOf("+"));
            System.out.println("Bracket index--->" + phnNo.charAt(0));

            if (matcher.matches()) {
                if (phnNo.contains("++") || phnNo.contains("--")) {
                    throw new ValidatorException(new FacesMessage(FacesMessage.SEVERITY_ERROR, error,
                                                                  "Can not contain two hyphen(--) or plus(++)"));
                } else if (phnNo.lastIndexOf("+") > 1) {
                    throw new ValidatorException(new FacesMessage(FacesMessage.SEVERITY_ERROR, error,
                                                                  "Plus sign should be in proper place"));
                } else if (phnNo.lastIndexOf("+") == 1 && phnNo.charAt(0) != '(') {
                    throw new ValidatorException(new FacesMessage(FacesMessage.SEVERITY_ERROR, error,
                                                                  "Plus sign should be in proper place"));
                } else if (phnNo.startsWith(" ") || phnNo.endsWith(" ")) {
                    throw new ValidatorException(new FacesMessage(FacesMessage.SEVERITY_ERROR, error,
                                                                  "Space Not allowed at start and end"));
                }

            } else {
                throw new ValidatorException(new FacesMessage(FacesMessage.SEVERITY_ERROR, error,
                                                              "Only numeric character,+,() and - allowed"));
            }

        }
    }

Cheers:) Happy Learning

Social Media Integration with Oracle ADF- Add Facebook like,share ,twitter ,LinkedIn button to your ADF page

This tutorial is dedicated to Social Media, beacuse of its importance in our daily life.
In this tutorial you will see that how can we use social media plugins in our ADF Application as Facebook like button,twitter and LinkedIn share button.

Read In detail