Java/JNDI LDAP/Name

Getting an Object"s Fully Qualified Name

  
import java.util.Hashtable;
import javax.naming.Context;
import javax.naming.InitialContext;
public class Main {
  public static void main(String[] argv) throws Exception {
    String url = "iiop://localhost/";
    Hashtable<String, String> env = new Hashtable<String, String>();
    env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.cosnaming.CNCtxFactory");
    env.put(Context.PROVIDER_URL, url);
    Context ctx = new InitialContext(env);
    // Create a subcontext.
    Context childCtx = ctx.createSubcontext("child");
    // Destroy the subcontext.
    ctx.destroySubcontext("child");
    Context obj = (Context) childCtx.lookup("grandChild");
    String fullname = obj.getNameInNamespace();
  }
}

Parsing a JNDI Composite Name

  
import javax.naming.rupositeName;
public class Main {
  public static void main(String[] argv) throws Exception {
    CompositeName composite = new CompositeName("cn=John,o=hits/summary.txt");
    String first = composite.get(0);
    String last = composite.get(composite.size() - 1); 
    composite.add(0, "yourname.ru"); 
    composite.remove(2); 
  }
}

Parsing a JNDI Compound Name

  
import java.util.Hashtable;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.Name;
import javax.naming.NameParser;
public class Main {
  public static void main(String[] argv) throws Exception {
    String url = "iiop://localhost/";
    Hashtable<String, String> env = new Hashtable<String, String>();
    env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.cosnaming.CNCtxFactory");
    env.put(Context.PROVIDER_URL, url);
    Context ctx = new InitialContext(env);
    NameParser parser = ctx.getNameParser("");
    Name dn = parser.parse("cn=John, ou=People, o=JNDITutorial");
    dn.remove(1); 
    dn.add(0, "c=us"); 
    dn.add("cn=fs"); 
  }
}

Replace the placeholders in the filter with the proper values from the userName

 
/*
 * Copyright 2007 The JA-SIG Collaborative. All rights reserved. See license
 * distributed with this file and available online at
 * http://www.ja-sig.org/products/cas/overview/license/
 */
import java.util.HashMap;
import java.util.Map;
import javax.naming.NamingException;
import javax.naming.directory.DirContext;

/**
 * Utilities related to LDAP functions.
 * 
 * @author Scott Battaglia
 * @version $Revision: 42053 $ $Date: 2007-06-10 09:17:55 -0400 (Sun, 10 Jun 2007) $
 * @since 3.0
 */
public final class LdapUtils {
 
    private LdapUtils() {
        // private constructor so that no one can instantiate.
    }
    /**
     * Utility method to replace the placeholders in the filter with the proper
     * values from the userName.
     * 
     * @param filter
     * @param userName
     * @return the filtered string populated with the username
     */
    public static String getFilterWithValues(final String filter,
        final String userName) {
        final Map<String, String> properties = new HashMap<String, String>();
        final String[] userDomain;
        String newFilter = filter;
        properties.put("%u", userName.replace("\\", "\\\\"));
        userDomain = userName.split("@");
        properties.put("%U", userDomain[0]);
        if (userDomain.length > 1) {
            properties.put("%d", userDomain[1]);
            final String[] dcArray = userDomain[1].split("\\.");
            for (int i = 0; i < dcArray.length; i++) {
                properties.put("%" + (i + 1), dcArray[dcArray.length
                    - 1 - i]);
            }
        }
        for (final String key : properties.keySet()) {
            final String value = properties.get(key);
            newFilter = newFilter.replaceAll(key, value);
        }
        return newFilter;
    }
    /**
     * Close the given context and ignore any thrown exception. This is useful
     * for typical finally blocks in manual Ldap statements.
     * 
     * @param context the Ldap context to close
     */
    public static void closeContext(final DirContext context) {
        if (context != null) {
            try {
                context.close();
            } catch (NamingException ex) {
               
            }
        }
    }
}

Show only the common name (cn) and e-mail address (mail) attributes

  
import java.util.Enumeration;
import java.util.Hashtable;
import javax.naming.Context;
import javax.naming.NamingEnumeration;
import javax.naming.directory.Attribute;
import javax.naming.directory.Attributes;
import javax.naming.directory.DirContext;
import javax.naming.directory.InitialDirContext;
import javax.naming.directory.SearchControls;
import javax.naming.directory.SearchResult;
public class Main {
  public static String INITCTX = "com.sun.jndi.ldap.LdapCtxFactory";
  public static String MY_HOST = "ldap://localhost:1389";
  public static String MY_SEARCHBASE = "o=server.ru";
  public static String MY_FILTER = "(sn=Carter)";
  public static String MY_ATTRS[] = { "cn", "mail" };
  public static void main(String args[]) throws Exception {
    Hashtable env = new Hashtable();
    env.put(Context.INITIAL_CONTEXT_FACTORY, INITCTX);
    env.put(Context.PROVIDER_URL, MY_HOST);
    DirContext ctx = new InitialDirContext(env);
    SearchControls constraints = new SearchControls();
    constraints.setSearchScope(SearchControls.SUBTREE_SCOPE);
    NamingEnumeration results = ctx.search(MY_SEARCHBASE, MY_FILTER, constraints);
    while (results != null && results.hasMore()) {
      SearchResult sr = (SearchResult) results.next();
      String dn = sr.getName() + ", " + MY_SEARCHBASE;
      System.out.println("Distinguished Name is " + dn);
      Attributes ar = ctx.getAttributes(dn, MY_ATTRS);
      if (ar == null) {
        System.out.println("Entry " + dn + " has none of the specified attributes\n");
        return;
      }
      for (int i = 0; i < MY_ATTRS.length; i++) {
        Attribute attr = ar.get(MY_ATTRS[i]);
        if (attr == null) {
          continue;
        }
        System.out.println(MY_ATTRS[i] + ":");
        for (Enumeration vals = attr.getAll(); vals.hasMoreElements();) {
          System.out.println("\t" + vals.nextElement());
        }
      }
    }
  }
}

Using a URL as a Name to the Initial Context

  
import javax.naming.InitialContext;
public class Main {
  public static void main(String[] argv) throws Exception {
    Object obj = new InitialContext().lookup("iiop://localhost/Sample");
  }
}