Class: Ldpath::Result

Inherits:
Object
  • Object
show all
Includes:
Functions
Defined in:
lib/ldpath/result.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Functions

#concat, #contains, #count, #earliest, #endsWith, #eq, #equals, #equalsIgnoreCase, #first, #flatten, #ge, #get, #gt, #isEmpty, #last, #latest, #le, #lt, #max, #min, #ne, #predicates, #replace, #round, #startsWith, #strJoin, #strLeft, #strRight, #strlen, #subList, #substr, #sum, #wc, #xpath

Constructor Details

#initialize(program, uri, cache: RDF::Util::Cache.new, context: nil, limit_to_context: false) ⇒ Result

Returns a new instance of Result.



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# File 'lib/ldpath/result.rb', line 6

def initialize(program, uri, cache: RDF::Util::Cache.new, context: nil, limit_to_context: false)
  @program = program
  @uri = uri
  @cache = cache
  @loaded = {}
  @context = context
  @limit_to_context = limit_to_context
end

Instance Attribute Details

#cache ⇒ Object (readonly)

Returns the value of attribute cache.



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# File 'lib/ldpath/result.rb', line 4

def cache
  @cache
end

#loaded ⇒ Object (readonly)

Returns the value of attribute loaded.



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# File 'lib/ldpath/result.rb', line 4

def loaded
  @loaded
end

#program ⇒ Object (readonly)

Returns the value of attribute program.



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# File 'lib/ldpath/result.rb', line 4

def program
  @program
end

#uri ⇒ Object (readonly)

Returns the value of attribute uri.



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# File 'lib/ldpath/result.rb', line 4

def uri
  @uri
end

Instance Method Details

#[](key) ⇒ Object 



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# File 'lib/ldpath/result.rb', line 29

def [](key)
  evaluate(mappings.find { |x| x.name == key })
end

#context ⇒ Object 



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# File 'lib/ldpath/result.rb', line 47

def context
  @context ||= load_graph(uri.to_s)
end

#func_call(fname, uri, context, *arguments) ⇒ Object 



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# File 'lib/ldpath/result.rb', line 41

def func_call(fname, uri, context, *arguments)
  raise "No such function: #{fname}" unless function_method? fname

  public_send(fname, uri, context, *arguments)
end

#load_graph(uri) ⇒ Object 



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# File 'lib/ldpath/result.rb', line 23

def load_graph(uri)
  cache[uri] ||= begin
    program.load(uri).tap { loaded[uri] = true }
  end
end

#loading(uri, context) ⇒ Object 



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# File 'lib/ldpath/result.rb', line 15

def loading(uri, context)
  return unless uri.to_s =~ /^http/
  return if loaded[uri.to_s]

  context << load_graph(uri.to_s) unless limit_to_context?
  context
end

#meta ⇒ Object 



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# File 'lib/ldpath/result.rb', line 55

def meta
  @meta ||= {}
end

#prefixes ⇒ Object 



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# File 'lib/ldpath/result.rb', line 51

def prefixes
  program.prefixes
end

#to_hash ⇒ Object 



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# File 'lib/ldpath/result.rb', line 33

def to_hash
  h = mappings.each_with_object({}) do |mapping, hash|
    hash[mapping.name] = evaluate(mapping).to_a
  end

  h.merge(meta)
end