LDAP query / configuration

[florlp]

Hello,

I have some problem with my first LDAP prototype.

An (external) LDAP server works well und connecting / browsing via Jxplorer is no problem.

I try a simple search/query in a java application.
First of all I set up a new context:

		LdapContextSource ctx = new LdapContextSource();
		ctx.setUrl(url);
		ctx.setUserDn(userDn);
		ctx.setPassword(password);
		ctx.setBase(base);
		ctx.setPooled(pooled);

(It should be a very simple application.. up to now, I do not need a xml configuration file..)

For a comfortable search, I want to use LdapTemplate.

ldapTemplate = new LdapTemplate(ctx);

For a simple test, I copied a code from http://static.springsource.org/sprin...roduction.html

	  public static List getAllPersonNames() {
	      return ldapTemplate.search(
	         base, "(objectclass=person)",
	         new AttributesMapper() {
	            public Object mapFromAttributes(Attributes attrs)
	               throws NamingException {
	               return attrs.get("cn").get();
	            }
	         });
	   }

If I try to execute the code, I get a Exception:

Exception in thread "main" java.lang.NullPointerException
at org.springframework.ldap.core.support.AbstractCont extSource.getReadOnlyContext(AbstractContextSource .java:125)
at org.springframework.ldap.core.LdapTemplate.search( LdapTemplate.java:287)
at org.springframework.ldap.core.LdapTemplate.search( LdapTemplate.java:259)
at org.springframework.ldap.core.LdapTemplate.search( LdapTemplate.java:571)
at org.springframework.ldap.core.LdapTemplate.search( LdapTemplate.java:556)
at org.springframework.ldap.core.LdapTemplate.search( LdapTemplate.java:411)
at org.springframework.ldap.core.LdapTemplate.search( LdapTemplate.java:431)
at org.springframework.ldap.core.LdapTemplate.search( LdapTemplate.java:451)
...

I need help.. what else I have to configurate for a simple query?




Edit:
Some additional information:

	public DirContext getReadOnlyContext() {
		if (!anonymousReadOnly) {
			return getContext(authenticationSource.getPrincipal(), authenticationSource.getCredentials());
		}
		else {
			return createContext(getAnonymousEnv());
		}
	}

This is AbstractContextSource.getReadOnlyContext(AbstractC ontextSource.java:125).
The exception occurs, because the authenticationSource is null. I do not understand why: all needed information are present in the LdapContextSource, aren't they?

If I make a new authenticationSource I just get another exception.:

		ctx.setAuthenticationSource(new AuthenticationSource() {
			
			@Override
			public String getPrincipal() {
				// TODO Auto-generated method stub
				return userDn;
			}
			
			@Override
			public String getCredentials() {
				// TODO Auto-generated method stub
				return password;
			}
		});

New exception

Exception in thread "main" java.lang.NullPointerException
at java.util.Hashtable.<init>(Unknown Source)
at org.springframework.ldap.core.support.AbstractCont extSource.getAuthenticatedEnv(AbstractContextSourc e.java:480)
at org.springframework.ldap.core.support.AbstractCont extSource.getContext(AbstractContextSource.java:10 6)
at org.springframework.ldap.core.support.AbstractCont extSource.getReadOnlyContext(AbstractContextSource .java:125)
at org.springframework.ldap.core.LdapTemplate.search( LdapTemplate.java:287)
at org.springframework.ldap.core.LdapTemplate.search( LdapTemplate.java:259)
at org.springframework.ldap.core.LdapTemplate.search( LdapTemplate.java:571)
at org.springframework.ldap.core.LdapTemplate.search( LdapTemplate.java:556)
at org.springframework.ldap.core.LdapTemplate.search( LdapTemplate.java:411)
at org.springframework.ldap.core.LdapTemplate.search( LdapTemplate.java:431)
at org.springframework.ldap.core.LdapTemplate.search( LdapTemplate.java:451)
..

at

Hashtable env = new Hashtable(getAnonymousEnv());

I just want to connect to the ldap server and run simple queries. It seems I missed something. Could someone give me some hints?