ADF : Phonenumber validator

## Phonenumber validator

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"));

           }

       }

   }