@Override
protected IterationResult<Entry> advance() throws Exception {
if (feed == null) {
ClientResponse response = client.getEntities(request);
ODataVersion version =
InternalUtil.getDataServiceVersion(
response.getHeaders().getFirst(ODataConstants.Headers.DATA_SERVICE_VERSION));
parser =
FormatParserFactory.getParser(
Feed.class,
client.getFormatType(),
new Settings(version, getMetadata(), getLastSegment(), null, fcMapping));
feed = parser.parse(client.getFeedReader(response));
feedEntries = feed.getEntries().iterator();
feedEntryCount = 0;
}
if (feedEntries.hasNext()) {
feedEntryCount++;
return IterationResult.next(feedEntries.next());
}
// old-style paging: $page and $itemsPerPage
if (request.getQueryParams().containsKey("$page")
&& request.getQueryParams().containsKey("$itemsPerPage")) {
if (feedEntryCount == 0) return IterationResult.done();
int page = Integer.parseInt(request.getQueryParams().get("$page"));
// int itemsPerPage = Integer.parseInt(request.getQueryParams().get("$itemsPerPage"));
request = request.queryParam("$page", Integer.toString(page + 1));
}
// new-style paging: $skiptoken
else {
if (feed.getNext() == null) return IterationResult.done();
int skipTokenIndex = feed.getNext().indexOf("$skiptoken=");
if (skipTokenIndex > -1) {
String skiptoken = feed.getNext().substring(skipTokenIndex + "$skiptoken=".length());
// decode the skiptoken first since it gets encoded as a query param
skiptoken = URLDecoder.decode(skiptoken, "UTF-8");
request = request.queryParam("$skiptoken", skiptoken);
} else if (feed.getNext().toLowerCase().startsWith("http")) {
request = ODataClientRequest.get(feed.getNext());
} else {
throw new UnsupportedOperationException();
}
}
feed = null;
return advance(); // TODO stackoverflow possible here
}