How to create Ldap JNDI for Spring Security?

[PeterSaw]

We are using the Jboss 5.1. Use Spring Security and Ldap for authentication.
Right now we set the ldap contextsource in xml as below and it works fine.
<security:ldap-server id="ldapServerAuthentication" url="ldap://10.20.20.152:8389/dc=com"/>

We want to create it as a JNDI in JBoss 5.1.
Then use this in xml like <jee:jndi-lookup id="ldapServerAuthentication" jndi-name="ldap/ldapAuthentication"/>

So I create deploy/ldap-service.xml as below, which I searched out from internet.

<?xml version="1.0" encoding="UTF-8"?>
<server>
<mbean code="org.jboss.naming.ExternalContext" name="jboss.jndi:service=ExternalContext,jndiName= ldap/ldapAuthentication">
<attribute name="JndiName">ldap/ldapAuthentication</attribute>
<attribute name="Properties">
java.naming.factory.initial=com.sun.jndi.ldap.Ldap CtxFactory
java.naming.provider.url=ldap://10.20.20.152:8389/dc=com
java.naming.security.credentials=modifier
java.naming.security.principal=uid=modifier,ou=sys tem,dc=com
</attribute>
<attribute name="InitialContext">javax.naming.ldap.InitialLda pContext</attribute>
<attribute name="RemoteAccess">false</attribute>
</mbean>
</server>

Anyway I got the error,
nested exception is java.lang.IllegalStateException: Cannot convert value of type [$Proxy142 implementing javax.naming.directory.DirContext,javax.naming.lda p.LdapContext,javax.naming.Context] to required type [org.springframework.ldap.core.support.BaseLdapPath ContextSource]: no matching editors or conversion strategy found

Think that I should use some Spring ldap classes to create the jndi or have to write the classes, but I can't find any document talking about that.
Please anyone can help me out? Thank you very much.


Actually the way I did for the jndi is correct, it returns the javax.naming.directory.DirContext.
However the spring security <ldap-server> expects the org.springframework.ldap.core.support.BaseLdapPath ContextSource (interface of DefaultSpringSecurityContextSource).
That's why the erorr msg complains type is not matched.

So I want to ask further question in another way.
Is there any way to convert javax.naming.directory.DirContext instance to org.springframework.ldap.core.support.BaseLdapPath ContextSource instance?
It looks I need the connections between jdk ldap implementation with spring ldap implementation.
That will solve my problem as well.