code: 	public BeanDefinition parse(Element elt, ParserContext pc) {
  		MatcherType matcherType = MatcherType.fromElement(elt);
  		String path = elt.getAttribute(HttpSecurityBeanDefinitionParser.ATT_PATH_PATTERN);
  		String requestMatcher = elt.getAttribute(ATT_REQUEST_MATCHER_REF);
  		String filters = elt.getAttribute(HttpSecurityBeanDefinitionParser.ATT_FILTERS);
  
  		BeanDefinitionBuilder builder = BeanDefinitionBuilder
  				.rootBeanDefinition(DefaultSecurityFilterChain.class);
  
  		if (StringUtils.hasText(path)) {
  			Assert.isTrue(!StringUtils.hasText(requestMatcher), "");
  			builder.addConstructorArgValue(matcherType.createMatcher(pc, path, null));
  		}
  		else {
  			Assert.isTrue(StringUtils.hasText(requestMatcher), "");
  			builder.addConstructorArgReference(requestMatcher);
  		}
  
  		if (filters.equals(HttpSecurityBeanDefinitionParser.OPT_FILTERS_NONE)) {
  			builder.addConstructorArgValue(Collections.EMPTY_LIST);
  		}
  		else {
  			String[] filterBeanNames = StringUtils.tokenizeToStringArray(filters, ",");
  			ManagedList<RuntimeBeanReference> filterChain = new ManagedList<RuntimeBeanReference>(
  					filterBeanNames.length);
  
  			for (String name : filterBeanNames) {
  				filterChain.add(new RuntimeBeanReference(name));
  			}
  
  			builder.addConstructorArgValue(filterChain);
  		}
  
  		return builder.getBeanDefinition();
  	}
  