how to make modifications to an object's attributes : Attributes « JNDI LDAP « Java

1. Java
2. JNDI LDAP
3. Attributes

how to make modifications to an object's attributes

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import java.util.Hashtable;

import javax.naming.Context;
import javax.naming.NamingEnumeration;
import javax.naming.NamingException;
import javax.naming.directory.Attribute;
import javax.naming.directory.Attributes;
import javax.naming.directory.BasicAttribute;
import javax.naming.directory.DirContext;
import javax.naming.directory.InitialDirContext;
import javax.naming.directory.ModificationItem;

/**
 * Demonstrates how to make modifications to an object's attributes. It remove
 * an attribute, adds an attribute value, and replaces an attribute value. After
 * making the modifications, it replaces the object's attributes with its
 * original attributes.
 * 
 * usage: java ModAttrs
 */

class ModAttrs {
  public static void main(String[] args) {

    // Set up the environment for creating the initial context
    Hashtable<String, Object> env = new Hashtable<String, Object>(11);
    env
        .put(Context.INITIAL_CONTEXT_FACTORY,
            "com.sun.jndi.ldap.LdapCtxFactory");
    env.put(Context.PROVIDER_URL, "ldap://localhost:389/o=JNDITutorial");

    try {
      // Create the initial context
      DirContext ctx = new InitialDirContext(env);
      String name = "cn=Ted Geisel, ou=People";

      // Save original attributes
      Attributes orig = ctx.getAttributes(name, new String[] { "mail",
          "telephonenumber", "jpegphoto" });

      // Specify the changes to make
      ModificationItem[] mods = new ModificationItem[3];

      // Replace the "mail" attribute with a new value
      mods[0] = new ModificationItem(DirContext.REPLACE_ATTRIBUTE,
          new BasicAttribute("mail", "geisel@wizards.com"));

      // Add additional value to "telephonenumber"
      mods[1] = new ModificationItem(DirContext.ADD_ATTRIBUTE,
          new BasicAttribute("telephonenumber", "+1 555 555 5555"));

      // Remove the "jpegphoto" attribute
      mods[2] = new ModificationItem(DirContext.REMOVE_ATTRIBUTE,
          new BasicAttribute("jpegphoto"));

      // Perform the requested modifications on the named object
      ctx.modifyAttributes(name, mods);

      // Check attributes
      System.out.println("**** new attributes *****");
      printAttrs(ctx.getAttributes(name));

      // Revert changes
      ctx.modifyAttributes(name, DirContext.REPLACE_ATTRIBUTE, orig);

      // Check that the attributes got restored
      System.out.println("**** reverted to original attributes *****");
      printAttrs(ctx.getAttributes(name));

      // Close the context when we're done
      ctx.close();
    } catch (Exception e) {
      e.printStackTrace();
    }
  }

  static void printAttrs(Attributes attrs) {
    if (attrs == null) {
      System.out.println("No attributes");
    } else {
      /* Print each attribute */
      try {
        for (NamingEnumeration ae = attrs.getAll(); ae.hasMore();) {
          Attribute attr = (Attribute) ae.next();
          System.out.println("attribute: " + attr.getID());

          /* print each value */
          for (NamingEnumeration e = attr.getAll(); e.hasMore(); System.out
              .println("value: " + e.next()))
            ;
        }
      } catch (NamingException e) {
        e.printStackTrace();
      }
    }
  }

}

 

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