public ServerResponse preProcess(HttpRequest request, ResourceMethod method)
throws Failure, WebApplicationException {
ServerResponse response = null;
Long requestId = RequestLogger.getInstance().getLogger().getRequestId();
logger.info("Request Interceptor: Processing request #%d", requestId);
List<NameValuePair> params = URLEncodedUtils.parse(request.getUri().getRequestUri(), "UTF-8");
// Handle paging parameters.
processPaging(request, params, requestId);
return response;
}
/**
* Handle Paging Parameters
*
* @param params
*/
private void processPaging(HttpRequest request, List<NameValuePair> params, Long requestId)
throws WebApplicationException {
// Grab session header and pull out all common parameters.
String page = null;
String sortBy = null;
String dir = null;
String top = null;
String pageSize = null;
String count = null;
PagingAttribute attr = null;
for (NameValuePair nameValuePair : params) {
if (nameValuePair.getName().equals("page")) page = nameValuePair.getValue();
else if (nameValuePair.getName().equals("top")) top = nameValuePair.getValue();
else if (nameValuePair.getName().equals("pageSize")) pageSize = nameValuePair.getValue();
else if (nameValuePair.getName().equals("sortBy")) sortBy = nameValuePair.getValue();
else if (nameValuePair.getName().equals("dir")) dir = nameValuePair.getValue();
else if (nameValuePair.getName().equals("count")) count = nameValuePair.getValue();
}
if (page != null) {
attr = new PagingAttribute();
int value = new Integer(page).intValue();
if (value == 0) ++value; // page=0 doesn't exist.
attr.setPageNumber(value);
attr.setActive(true);
if (pageSize != null && !pageSize.isEmpty()) {
attr.setPageSize(new Integer(pageSize));
}
if (count != null && !Boolean.parseBoolean(count)) {
attr.setType(PagingAttribute.PAGINABLE);
} else {
attr.setType(PagingAttribute.COUNT);
}
if (sortBy != null && !sortBy.isEmpty()) {
attr.setSortBy(sortBy);
if (dir != null) {
if (dir.toLowerCase().equals("asc") || dir.toLowerCase().equals("desc")) {
attr.setDir(dir);
} else {
logger.info("Request #%s rejected; dir parameter %s is not recognized", requestId, dir);
throw new CustomWebApplicationException(
HttpURLConnection.HTTP_BAD_REQUEST,
"Request #" + requestId + " rejected; dir parameter " + dir + " is not recognized");
}
}
}
} else if (top != null) {
attr = new PagingAttribute();
int value = new Integer(top).intValue();
attr.setTop(value);
attr.setType(PagingAttribute.PAGINABLE);
}
if (attr != null) {
PagingContextHolder pagingContextHolder = new PagingContextHolder(attr);
request.setAttribute(
Key.get(PagingContextHolder.class, Names.named("pagingContextHolder")).toString(),
pagingContextHolder);
}
}