Scenario:
LDAP can include some roles which are members of other roles. I try to assigned also these "nested roles" to user during authentication/authorization process.

In EAP 7.0 (with PicketBox) I am able to set configuration, which allows to assign these roles to user. LdapExtLoginModule with module option roleRecursion serves for this. It uses int value which determines how many levels should be searched and assigned to user. I am not able to achieve this scenario with Elytron and its ldap-realm.

Missing this feature in Elytron can lead to situation when migration from PicketBox to Elytron will not be possible since LDAP structure for role assignment used by legacy solution will not be able to work correctly with Elytron.

See example of LDIF for LDAP server:

dn: ou=People,dc=jboss,dc=org
objectclass: top
objectclass: organizationalUnit
ou: People

dn: uid=jduke,ou=People,dc=jboss,dc=org
objectclass: top
objectclass: person
objectclass: inetOrgPerson
uid: jduke
cn: Java Duke
sn: Duke
userPassword: Password1

dn: ou=Roles,dc=jboss,dc=org
objectclass: top
objectclass: organizationalUnit
ou: Roles

dn: cn=R1,ou=Roles,dc=jboss,dc=org
objectclass: top
objectclass: groupOfNames
cn: R1
member: uid=jduke,ou=People,dc=jboss,dc=org
description: the R1 group

dn: cn=R2,ou=Roles,dc=jboss,dc=org
objectclass: top
objectclass: groupOfNames
cn: R2
member: cn=R1,ou=Roles,dc=jboss,dc=org
description: the R2 group

dn: cn=R3,ou=Roles,dc=jboss,dc=org
objectclass: top
objectclass: groupOfNames
cn: R3
member: cn=R2,ou=Roles,dc=jboss,dc=org
description: the R3 group

In Elytron I am able to assigned only R1 role to user jduke. Legacy solution is able to use for example roleRecursion=1 which results to assign roles R1 and R2 to user jduke.