postPassword = paymentExpress.getPostPassword();
environment = paymentExpress.getEnvironment();
Mapping mapping = new Mapping();
InputSource input = new InputSource(getClass().getResourceAsStream("/com/jada/xml/paymentexpress/TxnRequestMapping.xml"));
mapping.loadMapping(input);
xmlContext = new XMLContext();
xmlContext.addMapping(mapping);
input = new InputSource(getClass().getResourceAsStream("/com/jada/xml/paymentexpress/TxnResultMapping.xml"));
mapping.loadMapping(input);