class OrConstraint < Constraint
  attr_accessor :constraints
  def initialize(constraints)
    @constraints = constraints.compact.uniq
  end
  
  def to_s
    "Or<#{@constraints.collect {|c| c.inspect }.join(", ")}>"
  end
  
  def inspect
    to_s
  end
  
  def eql?(b)
    return false if !b.is_a?(OrConstraint)
    a = Set.new(@constraints) 
    b = Set.new(b.constraints)
    
    return false if a.size != b.size
    a.each do |x|
      ret = false
      b.each do |y|
        if x.eql?(y)
          ret = true
          break
        end
      end
      return false if !ret
    end
    return true
  end
end