if(callback.getCallbackType() == SAMLCallback.ATTR_CALLBACK){
SAMLAttributeCallback cb = (SAMLAttributeCallback)callback;
SAMLAttribute attribute = new SAMLAttribute("Name",
"https://rahas.apache.org/saml/attrns", null, -1, Arrays
.asList(new String[] { "Custom/Rahas" }));
cb.addAttributes(attribute);
}else if(callback.getCallbackType() == SAMLCallback.NAME_IDENTIFIER_CALLBACK){
SAMLNameIdentifierCallback cb = (SAMLNameIdentifierCallback)callback;
SAMLNameIdentifier nameId = new SAMLNameIdentifier(
"David", null, SAMLNameIdentifier.FORMAT_EMAIL);
cb.setNameId(nameId);