Class: OpenTox::Parser::Owl::Dataset

Inherits:
Object
  • Object
show all
Includes:
OpenTox::Parser::Owl
Defined in:
lib/parser.rb

Overview

OWL-DL parser for datasets

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from OpenTox::Parser::Owl

from_rdf, #load_metadata

Constructor Details

#initialize(uri, subjectid = nil) ⇒ OpenTox::Parser::Owl::Dataset

Create a new OWL-DL dataset parser

Parameters:

  • uri —

    Dataset URI



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# File 'lib/parser.rb', line 124

def initialize(uri, subjectid=nil)
  super uri
  @dataset = ::OpenTox::Dataset.new(@uri, subjectid)
end

Instance Attribute Details

#uri=(value) ⇒ Object (writeonly)

Sets the attribute uri

Parameters:

  • value —

    the value to set the attribute uri to.



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# File 'lib/parser.rb', line 119

def uri=(value)
  @uri = value
end

Instance Method Details

#load_features(subjectid = nil) ⇒ Hash

Read only features from a dataset service.

Returns:

  • (Hash) —

    Internal features representation



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# File 'lib/parser.rb', line 208

def load_features(subjectid=nil)
  if File.exist?(@uri)
    file = File.new(@uri)
  else
    file = Tempfile.new("ot-rdfxml")
    # do not concat /features to uri string, this would not work for dataset/R401577?max=3 
    uri = URI::parse(@uri)
    uri.path = File.join(uri.path,"features")
    uri = uri.to_s
    file.puts OpenTox::RestClientWrapper.get uri,{:subjectid => subjectid,:accept => "application/rdf+xml"},nil,false
    file.close
    to_delete = file.path
  end
  statements = []
  features = Set.new
  `rapper -i rdfxml -o ntriples #{file.path} 2>/dev/null`.each_line do |line|
    triple = line.chomp.split('> ').collect{|i| i.sub(/\s+.$/,'').gsub(/[<>"]/,'')}[0..2]
    statements << triple
    features << triple[0] if triple[1] == RDF['type'] and (triple[2] == OT.Feature || triple[2] == OT.NumericFeature) 
  end
  File.delete(to_delete) if to_delete
  statements.each do |triple|
    if features.include? triple[0]
      @dataset.features[triple[0]] = {} unless @dataset.features[triple[0]] 
      @dataset.features[triple[0]][triple[1]] = triple[2].split('^^').first
    end
  end
  @dataset.features
end

#load_uri(subjectid = nil) ⇒ Hash

Read data from dataset service. Files can be parsed by setting #uri to a filename (after initialization with a real URI)

Examples:

Read data from an external service

parser = OpenTox::Parser::Owl::Dataaset.new "http://wwbservices.in-silico.ch/dataset/1"
dataset = parser.load_uri

Create dataset from RDF/XML file

dataset = OpenTox::Dataset.create
parser = OpenTox::Parser::Owl::Dataaset.new dataset.uri
parser.uri = "dataset.rdfxml" # insert your input file
dataset = parser.load_uri
dataset.save

Returns:

  • (Hash) —

    Internal dataset representation



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# File 'lib/parser.rb', line 140

def load_uri(subjectid=nil)
  
  # avoid using rapper directly because of 2 reasons:
  # * http errors wont be noticed
  # * subjectid cannot be sent as header
  ##uri += "?subjectid=#{CGI.escape(subjectid)}" if subjectid
  ##`rapper -i rdfxml -o ntriples #{file} 2>/dev/null`.each_line do |line| 
  if File.exist?(@uri)
    file = File.new(@uri)
  else
    file = Tempfile.new("ot-rdfxml")
    file.puts OpenTox::RestClientWrapper.get @uri,{:subjectid => subjectid,:accept => "application/rdf+xml"},nil,false
    file.close
    to_delete = file.path
  end
  
  data = {}
  feature_values = {}
  feature = {}
  other_statements = {}
  `rapper -i rdfxml -o ntriples #{file.path} 2>/dev/null`.each_line do |line|
    triple = line.chomp.split(' ',3)
    triple = triple[0..2].collect{|i| i.sub(/\s+.$/,'').gsub(/[<>"]/,'')}
    case triple[1] 
    when /#{OT.values}/i
      data[triple[0]] = {:compound => "", :values => []} unless data[triple[0]]
      data[triple[0]][:values] << triple[2]  
    when /#{OT.value}/i
      feature_values[triple[0]] = triple[2] 
    when /#{OT.compound}/i
      data[triple[0]] = {:compound => "", :values => []} unless data[triple[0]]
      data[triple[0]][:compound] = triple[2]  
    when /#{OT.feature}/i
      feature[triple[0]] = triple[2]
    when /#{RDF.type}/i
      if triple[2]=~/#{OT.Compound}/i and !data[triple[0]]
        data[triple[0]] = {:compound => triple[0], :values => []} 
      end
    else 
    end
  end
  File.delete(to_delete) if to_delete
  data.each do |id,entry|
    if entry[:values].size==0
      # no feature values add plain compounds
      @dataset.add_compound(entry[:compound])
    else
      entry[:values].each do |value_id|
        split = feature_values[value_id].split(/\^\^/)
        case split[-1]
        when XSD.double, XSD.float 
          value = split.first.to_f
        when XSD.boolean
          value = split.first=~/(?i)true/ ? true : false                
        else
          value = split.first
        end
        @dataset.add entry[:compound],feature[value_id],value
      end
    end
  end
  load_features subjectid
  @dataset.metadata = load_metadata(subjectid)
  @dataset
end