Redland::Stream

This module provides a method to generate a stream of statements, suitable for outputing from RDF/XML parsers, returning as the results of queries and serialising models in order to manipulate them or transform into another syntax.

Attributes

stream[RW]

Public Class Methods

create_finalizer(stream) click to toggle source

You shouldn't use this. Used internally for cleanup.

# File rdf/redland/stream.rb, line 22
def Stream.create_finalizer(stream)
  proc {|id| # "Finalizer on #{id}"
    #puts "closing stream"
    Redland::librdf_free_stream(stream)
  }
end

new(object,model) click to toggle source

Create a wrapper for a librdf_stream object (?? confirm)

# File rdf/redland/stream.rb, line 15
def initialize(object,model)
  @stream = object
  @model = model
  ObjectSpace.define_finalizer(self,Stream.create_finalizer(@stream))
end

Public Instance Methods

context() click to toggle source

Get the context of the current Statement in the stream

# File rdf/redland/stream.rb, line 62
def context()
  if not self.stream
    return true
  end
  my_node = Redland.librdf_stream_get_context(@stream)
  if not my_node
    return nil
  else
    return Node.new(:from_object=>my_node)
  end
end

current() click to toggle source

Get the current Statement in the stram

# File rdf/redland/stream.rb, line 39
def current
  if not self.stream
    return nil
  end
  my_statement = Redland.librdf_stream_get_object(self.stream)
  
  unless my_statement
    return nil
  else
    return Statement.new(:from_object=>my_statement,:model=>@model)
  end
end

end?() click to toggle source

Test if the stream has ended

# File rdf/redland/stream.rb, line 30
def end?
  if not @stream
    return true
  else
    return (Redland.librdf_stream_end(self.stream) != 0)
  end
end

next() click to toggle source

Move to the next Statement in the stream

# File rdf/redland/stream.rb, line 53
def next()
  if not self.stream
    return true
  else
    return Redland.librdf_stream_next(self.stream)
  end
end

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Redland::Stream

Attributes

Public Class Methods

Public Instance Methods