Class: InterMine::PathQuery::ConstraintFactory

Inherits:
Object
  • Object
show all
Defined in:
lib/intermine/query.rb

Direct Known Subclasses

TemplateConstraintFactory

Instance Method Summary collapse

Constructor Details

#initialize(query) ⇒ ConstraintFactory

Returns a new instance of ConstraintFactory.



827
828
829
830
831
832
833
834
835
 
# File 'lib/intermine/query.rb', line 827

def initialize(query)
    @classes = [
        SingleValueConstraint, 
        SubClassConstraint, 
        LookupConstraint, MultiValueConstraint, 
        UnaryConstraint, LoopConstraint, ListConstraint]

    @query = query
end

Instance Method Details

#make_constraint(args) ⇒ Object 



837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
 
# File 'lib/intermine/query.rb', line 837

def make_constraint(args)
    case args.length 
    when 2
        parameters = {:path => args[0], :op => args[1]}
    when 3
        if args[2].is_a?(Array)
            parameters = {:path => args[0], :op => args[1], :values => args[2]}
        elsif LoopConstraint.valid_ops.include?(args[1])
            parameters = {:path => args[0], :op => args[1], :loopPath => args[2]}
        else
            parameters = {:path => args[0], :op => args[1], :value => args[2]}
        end
    when 4
        parameters = {:path => args[0], :op => args[1], :value => args[2], :extra_value => args[3]}
    else
        parameters = args.first
    end

    attr_keys = parameters.keys
    suitable_classes = @classes.select { |cls| 
        is_suitable = true
        attr_keys.each { |key| 
            is_suitable = is_suitable && (cls.method_defined?(key)) 
            if key.to_s == "op"
                is_suitable = is_suitable && cls.valid_ops.include?(parameters[key])
            end
        }
        is_suitable
    }
    if suitable_classes.size > 1
        raise ArgumentError, "More than one class found for #{parameters.inspect}"
    elsif suitable_classes.size < 1
        raise ArgumentError, "No suitable classes found for #{parameters.inspect}"
    end

    cls = suitable_classes.first
    con = cls.new
    parameters.each_pair { |key, value|
        if key == :path || key == :loopPath
            value = @query.path(value)
        end
        if key == :sub_class
            value = InterMine::Metadata::Path.new(value, @query.model)
        end
        con.send(key.to_s + '=', value)
    }
    con.validate
    if con.respond_to?(:code)
        code = con.code
        if code.nil?
            con.code = @query.next_code
        else
            code = code.to_s
            unless Query.is_valid_code(code)
                raise ArgumentError, "Coded must be between A and Z, got: #{code}"
            end
            if @query.used_codes.include?(code)
                con.code = @query.next_code
            end
        end
    end

    return con
end