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# frozen_string_literal: false require_relative 'validationexception' module REXML module Validation module Validator NILEVENT = [ nil ] def reset @current = @root @root.reset @root.previous = true @attr_stack = [] self end def dump puts @root.inspect end def validate( event ) @attr_stack = [] unless defined? @attr_stack match = @current.next(event) raise ValidationException.new( "Validation error. Expected: "+ @current.expected.join( " or " )+" from #{@current.inspect} "+ " but got #{Event.new( event[0], event[1] ).inspect}" ) unless match @current = match # Check for attributes case event[0] when :start_element @attr_stack << event[2] begin sattr = [:start_attribute, nil] eattr = [:end_attribute] text = [:text, nil] k, = event[2].find { |key,value| sattr[1] = key m = @current.next( sattr ) if m # If the state has text children... if m.matches?( eattr ) @current = m else text[1] = value m = m.next( text ) text[1] = nil return false unless m @current = m if m end m = @current.next( eattr ) if m @current = m true else false end else false end } event[2].delete(k) if k end while k when :end_element attrs = @attr_stack.pop raise ValidationException.new( "Validation error. Illegal "+ " attributes: #{attrs.inspect}") if attrs.length > 0 end end end class Event def initialize(event_type, event_arg=nil ) @event_type = event_type @event_arg = event_arg end attr_reader :event_type attr_accessor :event_arg def done? @done end def single? return (@event_type != :start_element and @event_type != :start_attribute) end def matches?( event ) return false unless event[0] == @event_type case event[0] when nil return true when :start_element return true if event[1] == @event_arg when :end_element return true when :start_attribute return true if event[1] == @event_arg when :end_attribute return true when :end_document return true when :text return (@event_arg.nil? or @event_arg == event[1]) =begin when :processing_instruction false when :xmldecl false when :start_doctype false when :end_doctype false when :externalentity false when :elementdecl false when :entity false when :attlistdecl false when :notationdecl false when :end_doctype false =end else false end end def ==( other ) return false unless other.kind_of? Event @event_type == other.event_type and @event_arg == other.event_arg end def to_s inspect end def inspect "#{@event_type.inspect}( #@event_arg )" end end end end