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.



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# File 'lib/intermine/query.rb', line 849

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

    @query = query
end

Instance Method Details

#make_constraint(args) ⇒ Object 



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# File 'lib/intermine/query.rb', line 859

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