Java by API/javax.naming.directory/DirContext

DirContext: modifyAttributes(String name, int mod_op, Attributes attrs)

   
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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.ru"));
      // 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();
      }
    }
  }
}