|  | @@ -40,6 +40,7 @@ class AuthenticationProviderBeanDefinitionParser implements BeanDefinitionParser
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				|  |  |          String ref = element.getAttribute(ATT_USER_DETAILS_REF);
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				|  |  |          Element userServiceElt = DomUtils.getChildElementByTagName(element, Elements.USER_SERVICE);
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				|  |  |          Element jdbcUserServiceElt = DomUtils.getChildElementByTagName(element, Elements.JDBC_USER_SERVICE);
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				|  |  | +        Element ldapUserServiceElt = DomUtils.getChildElementByTagName(element, Elements.LDAP_USER_SERVICE);
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				|  |  |  
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				|  |  |          if (StringUtils.hasText(ref)) {
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				|  |  |              if (userServiceElt != null || jdbcUserServiceElt != null) {
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				|  | @@ -59,6 +60,8 @@ class AuthenticationProviderBeanDefinitionParser implements BeanDefinitionParser
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				|  |  |              userDetailsService = new UserServiceBeanDefinitionParser().parse(userServiceElt, parserContext);
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				|  |  |          } else if (jdbcUserServiceElt != null) {
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				|  |  |              userDetailsService = new JdbcUserServiceBeanDefinitionParser().parse(jdbcUserServiceElt, parserContext);
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				|  |  | +        } else if (ldapUserServiceElt != null) {
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				|  |  | +            userDetailsService = new LdapUserServiceBeanDefinitionParser().parse(ldapUserServiceElt, parserContext);
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				|  |  |          } else {
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				|  |  |              throw new SecurityConfigurationException(Elements.AUTHENTICATION_PROVIDER
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				|  |  |                      + " requires a UserDetailsService" );
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