[redland-dev] [Redland RDF API 0000364]: [Wishlist] librdf_storage_count_contexts() method to get number of contexts

[Mantis Bug Tracker]

The following issue has been SUBMITTED. 
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http://bugs.librdf.org/mantis/view.php?id=364 
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Reported By:                njh
Assigned To:                
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Project:                    Redland RDF API
Issue ID:                   364
Category:                   api
Reproducibility:            N/A
Severity:                   feature
Priority:                   low
Status:                     new
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Date Submitted:             2010-04-03 11:07
Last Modified:              2010-04-03 11:07
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Summary:                    [Wishlist] librdf_storage_count_contexts() method to
get number of contexts
Description: 
Function to count the number of contexts in a model for statistical
reporting.

Functions to count the number of resources/literals/predicates may also be
interesting.

Performance could be improved if the storage backend implemented this
function.


My current implementation in RedStore is:

int count_contexts(librdf_storage * storage)
{
    librdf_iterator *iterator = NULL;
    int count = 0;

    assert(storage != NULL);

    iterator = librdf_storage_get_contexts(storage);
    if (!iterator) {
        redstore_error("librdf_storage_get_contexts returned NULL");
        return -1;
    }

    while (!librdf_iterator_end(iterator)) {
        count++;
        librdf_iterator_next(iterator);
    }

    librdf_free_iterator(iterator);

    return count;
}

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Issue History 
Date Modified    Username       Field                    Change               
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2010-04-03 11:07 njh            New Issue                                    
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