Adding new set of attrs with old attrs values

Question

Our DS architecture has changed and we need to change a node in our DS which holds information about our applications.So, we need to add new attributes for all the entries in this node and have these new attributes reflect the value of the old attributes and then remove the old attributes.
If anyone has done this before or has snippets of code please let us know.
thx

Answer 1

here is code that I have. It compiles runs but does not even enter the while loop at all. Could someone please take look tell me what thinks I have overlooked.
import javax.naming.Context;
import javax.naming.directory.InitialDirContext;
import javax.naming.directory.DirContext;
import javax.naming.directory.Attributes;
import javax.naming.NamingException;
import javax.naming.*;
import javax.naming.directory.*;
import javax.naming.directory.SearchControls;
import java.util.*;
import javax.naming.*;
public class WriteAttributes
public static void main(String[] args)
String filter = "cn=DummyApp1"; // change value to * to retrieve all entries
String dn = "ou=Applications,o=company.com,o=sds";
Hashtable env = new Hashtable();
env.put(Context.INITIAL_CONTEXT_FACTORY,
"com.sun.jndi.ldap.LdapCtxFactory");
env.put(Context.SECURITY_AUTHENTICATION, "simple");
env.put(Context.PROVIDER_URL, "ldap://XXXXXXX");
env.put(Context.SECURITY_PRINCIPAL, "cn=Directory Manager");
env.put(Context.SECURITY_CREDENTIALS, "XXXXXX");
try {
DirContext ctx = new InitialDirContext(env);
SearchControls constraints = new SearchControls();
constraints.setSearchScope(SearchControls.SUBTREE_SCOPE);
NamingEnumeration results = ctx.search("", filter, constraints);
Attributes attrs = ctx.getAttributes(filter+","+dn);
// it doesn't enter this loop, jumps tp last print stmt.
while (results != null && results.hasMore())
System.out.println("Entered while loop");
SearchResult si = (SearchResult)results.next();
/* print its name, cn , and for each one add objectclass and asscociated attributes*/
System.out.println(si.getName());
Attributes my_attrs = new BasicAttributes(true);
Attribute objclass = new BasicAttribute("objectclass");
objclass.add("applicationEntity");
objclass.add("applicationResource");
my_attrs.put("abbreviation", (String)attrs.get("seg-abbreviation").get());
my_attrs.put(objclass);
ctx.modifyAttributes(filter,ctx.ADD_ATTRIBUTE,my_attrs);
Attributes _attrs = si.getAttributes();
if (attrs == null) {
System.out.println("No attributes");
} else {
/* print each attribute */
for (NamingEnumeration ae = _attrs.getAll();
ae.hasMoreElements();) {
Attribute attr = (Attribute)ae.next();
String attrId = attr.getID();
/* print each value */
for (Enumeration vals = attr.getAll();
vals.hasMoreElements();
System.out.println(attrId + ": " + vals.nextElement()))
System.out.println("-------------------------------");
} catch (NamingException e) {
System.err.println("Search failed.");
e.printStackTrace();