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<?php
namespace com\linways\core\ams\professional\service;
use com\linways\core\ams\professional\exception\ProfessionalException;
class TcService extends BaseService
{
    private static $_instance = null;
    
    // /Condition 2 - Locked down the constructor
    private function __construct() {
    }
    // Prevent any oustide instantiation of this class
    
    // /Condition 3 - Prevent any object or instance of that class to be cloned
    private function __clone() {
    }
    // Prevent any copy of this object
    
    // /Condition 4 - Have a single globally accessible static method
    public static function getInstance() {
        if (! is_object ( self::$_instance )) // or if( is_null(self::$_instance) ) or if( self::$_instance == null )
            self::$_instance = new self ();
            
            return self::$_instance;
    }
    /**
     * Get student TC details.
     * 
     * @param  $studentId
     * @throws ProfessionalException
     * @return object
     * @author Vishnu M
     */
    public function getTcDetails ( $studentId ) {
        $studentId = $this->realEscapeString($studentId);
        $tcDetails = null;
        $sql = "SELECT * FROM studentTransferCertificate WHERE studentId = ".$studentId."";
        try {
            $tcDetails = $this->executeQueryForObject($sql);
        }
        catch(\Exception $e) {
            throw new ProfessionalException($e->getCode(),$e->getMessage());
        }
        return $tcDetails;
    }
}