Subversion Repositories SmartDukaan

	/**

	 * Refund the amount which was captured for this payment Id. Makes

	 * requests over the network and so internet connectivity is must for it to

	 * succeed.

	 * 

	 * @param amount

	 *            The amount to be refunded.

	 * @param paymentId

	 *            The payment ID generated by the gateway.

	 * @return A Map. The Map will definitely have status and will have error

	 *         information in case of error and txn information in case of

	 *         success. In case there is an error in processing, the returned

	 *         result map will be empty.

	 */

	public static Map<String, String> refundPayment(Payment payment, double amount){

	    String paymentId = payment.getGatewayPaymentId();

		System.out.println("Refunding amount: Rs " + amount + " for payment Id: " + paymentId);

		URL url = null;

	    URLConnection urlConn = null;

	    DataOutputStream printout;

	    BufferedReader reader;

	    Map<String, String> resultMap = new HashMap<String, String>();

	    //Prepare resultMap to elicit failure behaviour in case anything goes wrong.

	    resultMap.put(STATUS, "");

		/*

		 * HDFC Insanity

		 * 

		 * If we don't set this property, all payments through HDFC will fail if

		 * the first payment is made through EBS.

		 * 

		 * The JAR file provided by HDFC requires that the instances of

		 * HttpsURLConnection returned by a call to URL.openConnection be an

		 * instance of com.sun.net.ssl.HttpsURLConnection. Java versions before

		 * 1.4 used to return an instance of this class which goes against the

		 * current policy of using instances of undocumented internal classes of

		 * JDK since they can change at any time. This behaviour was changed in

		 * JAVA 1.4 to return instances of javax.net.ssl.HttpsURLConnection.

		 * However, it appears, that to allow clients with JDK 1.4 and earlier,

		 * HDFC favours the use of the deprecated class.

		 */

	    System.setProperty("java.protocol.handler.pkgs", "com.sun.net.ssl.internal.www.protocol");

	    try {

		    // URL of CGI-Bin script.

			url = new URL("https://secure.ebs.in/api/1_0");

		    // URL connection channel.

		    urlConn = url.openConnection();

		    //urlConn.setRequestMethod("POST");

	    } catch (MalformedURLException e1) {

	    	log.error(Errors.CAPTURE_FAILURE.message, e1);

			resultMap.put(ERR_CODE, Errors.CAPTURE_FAILURE.code);

			resultMap.put(ERROR, Errors.CAPTURE_FAILURE.message);

			return resultMap;

		} catch (IOException e) {

			log.error("Unable to initialize connection to EBS API server", e);

			resultMap.put(ERR_CODE, Errors.CONN_FAILURE.code);

			resultMap.put(ERROR, Errors.CONN_FAILURE.message);

			return resultMap;

		}

	    // Let the run-time system (RTS) know that we want input.

	    urlConn.setDoInput (true);

	    // Let the RTS know that we want to do output.

	    urlConn.setDoOutput (true);

	    // No caching, we want the real thing.

	    urlConn.setUseCaches (false);

	    // Specify the content type.

	    urlConn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");

	    // Send POST output.

	    try {

			printout = new DataOutputStream (urlConn.getOutputStream ());

		    String content =

			    "Action=" + URLEncoder.encode("refund", "UTF-8") +

			    "&AccountID=" + URLEncoder.encode(accountId, "UTF-8") +

			    "&SecretKey=" + URLEncoder.encode(secretKey, "UTF-8") +

			    "&Amount=" + URLEncoder.encode(""+amount, "UTF-8") +

			    "&PaymentID=" + URLEncoder.encode(paymentId, "UTF-8") +

			    "&submitted=Submit";

		    printout.writeBytes (content);

		    printout.flush ();

		    printout.close ();

		    // Get response data.

		    reader = new BufferedReader(new InputStreamReader(urlConn.getInputStream()));

		    resultMap = parseCaptureOutput(reader);

		    resultMap.put(REFUND_TXN_ID, resultMap.get(CAPTURE_TXN_ID));

		    resultMap.put(REFUND_TIME, resultMap.get(CAPTURE_TIME));

		    resultMap.remove(CAPTURE_TXN_ID);

		    resultMap.remove(CAPTURE_TIME);

		    reader.close ();

	    }

	    catch(ConnectException e) {

            log.error("Unable to initialize connection to EBS API server", e);

            resultMap.put(ERR_CODE, Errors.CONN_FAILURE.code);

            resultMap.put(ERROR, Errors.CONN_FAILURE.message);

            return resultMap;

        } 

	    catch (IOException e) {

	    	log.error(Errors.CAPTURE_FAILURE.message, e);

			resultMap.clear();

			resultMap.put(STATUS, "");

			resultMap.put(ERR_CODE, Errors.CAPTURE_FAILURE.code);

			resultMap.put(ERROR, Errors.CAPTURE_FAILURE.message);

		}

	    return resultMap;