class Object - Ruby to JAS

_pprint(l) click to toggle source

Formats a list l to be displayed in a tabular layout. It is possible to pass an integer width to the textwrap function. The width of the terminal window could be obtained via the Python console module. However, since it is not included in Jas, we decided not to use it. The default width that textwrap uses is set to 70. There might be a better way to do this.

# File examples/sdjas.rb, line 57
def _pprint(l)
    col = l.map{ |x| x.length }.max + 3 #  [len(x) for x in l]) + 3
    padded = l.map{|x| x.ljust(col) } #.join('')
    #print textwrap(padded).join('\n')
    line = ''
    num = 70
    padded.each{|x| line.length < num ? line+=x : begin puts line; line=x end }
end

_uri_to_name(uri) click to toggle source

Converts a uri to a name or key by only taking everything after the last / or (if present) #.

Examples:

http://example.com/test             ->   test
http://example.com/model#testedBy   ->   testedBy

# File examples/sdjas.rb, line 38
def _uri_to_name(uri)
    usplit = URI(uri) #urlsplit(uri)
    if usplit.fragment != nil
        return usplit.fragment
    else
        #return pathsplit(usplit.path)[-1]
        return usplit.path.split('/')[-1]
    end
end

get_value_for_URI(sd, uri, predicate) click to toggle source

A quick convienience function to retrieve a single value of a given triple (object, predicate, …)

The parameter sd is a SymbolicData object that contains information about the SPARQL endpoint.

# File examples/sdjas.rb, line 73
def get_value_for_URI(sd, uri, predicate)
    result = nil
    query = "SELECT * WHERE { <#{uri}> <#{predicate}> ?x }"
    begin
        qj = SPARQL.new(sd, query)
        #puts "qj.json = " + str(qj.json)
        result = qj.json['results']['bindings'][0]['x']['value']
    rescue
        #pass 
    end
    return result
end