Here is some code for paged querying InfoStore (BO XI 3.1):

String uri = "path://InfoObjects/**[si_kind='Webi' and si_instance=0]"; 
PagingQueryOptions options = new PagingQueryOptions();
IPageResult ips = infoStore.getPagingQuery(uri, options);
Iterator<String> pageResultIter = ips.iterator();
while (pageResultIter.hasNext()) {
    String pageQuery = pageResultIter.next();
    IStatelessPageInfo pageInfo = infoStore.getStatelessPageInfo(pageQuery, options);
    String sql = pageInfo.getPageSQL();
    System.out.println(sql);
    IInfoObjects infoobjects = infoStore.query(sql);
    // do something with the infoobjects ...
}

Let’s look at it line by line.

String uri = "path://InfoObjects/**[si_kind='Webi' and si_instance=0]";

We will query all Webi documents in the CMS using path query. Double asterisk mean recursive search. Root Folder is displayed as Public Folders in InfoView.

PagingQueryOptions options = new PagingQueryOptions();

PagingQueryOptions determines how the result will be paged. You can provide some parameters to the constructor.

• Page size – the number of objects returned in the page
• Whether the query is incremental. If the query is incremental, the page will always be equal to the page size. If the query is not incremental, paging is determined during the initial query, so if some objects are deleted or added, the page size might vary.
• Options – control if the query will be decoded (e.g. useful if your query contains %), whether to include security parameters to the query, exclude temporary objects

Details can be found in the documentationPagingQueryOptions.

IPageResult ips = infoStore.getPagingQuery(uri, options);
Iterator<String> pageResultIter = ips.iterator();

Initial paging query provides string iterator. The iterator will return the same URI query but with paging parameters.

while (pageResultIter.hasNext()) {
    String pageQuery = pageResultIter.next();
    ...
}

This is the classic way to loop using a Java iterator.

IStatelessPageInfo pageInfo = infoStore.getStatelessPageInfo(pageQuery, options);
String sql = pageInfo.getPageSQL();
IInfoObjects infoobjects = infoStore.query(sql);

These lines builds the SQL queries to retrieve the objects of the page.