missing method on javax.jcr.RangeIterator

[Brian Street]

The JavaDocs for javax.jcr.RangeIterator#getSize claims there should be a "getNumberRemaining" estimate:

/**
 * Returns the total number of of items available through this iterator. For
 * example, for some node <code>N</code>, <code>N.getNodes().getSize()</code>
 * returns the number of child nodes of <code>N</code> visible through the
 * current <code>Session</code>. In some implementations precise information
 * about the number of elements may not be available. In such cases this
 * method must return -1. API clients will then be able to use
 * <code>RangeIterator.getNumberRemaining</code> to get an estimate on the
 * number of elements.
 *
 * @return a long
 */
public long getSize();

We are looking for a count of documents linked to another document and the best I can come up with is:

long count = 0L;
try {
    Session session = requestContext.getSession();
    RangeIterator iterator = buildQuery(session, locale, queryBasePath, uuid)
        .execute()
        .getNodes();
    count = iterator.getSize();
    if (-1L == count) {
        log.warn("fallback to slow counting...");
        //count = iterator.getNumberRemaining();  // per JavaDocs should exist javax.jcr.RangeIterator.getSize
        count = Iterators.size(iterator);  // Guava count instead of while(iterator.hasNext()) {...}
    }
} catch (RepositoryException e) {
    log.error("RepositoryException thrown: {}", e.getMessage());
}
return count;

Are there any classes or methods that would permit me to avoid counting items?

[Woonsan Ko]

The RangeIterator you've got must be of type org.hippoecm.repository.api.HippoNodeIterator.

HippoNodeIterator#getTotalSize() will return the real count without having to iterate.

Please see org.hippoecm.hst.content.beans.query.HstQueryResultImpl#getTotalSize() on how to implement depending on HippoNodeIterator. Or just use HstQuery and HstQueryResult instead.

Regards,

Woonsan

 

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