Read GUID with java

Question

Hi to all, I need some help with java to retrieve the eDirectory GUID. I
know it's a binary data field and I need to decode it to read the value,
but I'm not able to retrieve anything, even if I name the attribute
because it is operational.
This is my code. What am I doing wrong?
import com.novell.ldap.*;
import java.io.UnsupportedEncodingException;
public class GuidReader {
public static void main( String[] args ) {
String loginDN = "cn=admin,o=system";
String password = "MYPASSWORD";
String searchBase = "MYCONTEXT";
String searchFilter = "(cn=MYUSERNAME)";
int searchScope = LDAPConnection.SCOPE_SUB;
LDAPConnection lc = new LDAPConnection();
try {
lc.connect( "MYIPADDRESS", 389 );
try {
lc.bind( LDAPConnection.LDAP_V3, loginDN,
password.getBytes("UTF8"));
} catch (UnsupportedEncodingException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
LDAPSearchResults searchResults = lc.search(
searchBase,
searchScope,
searchFilter,
null,
false );
while ( searchResults.hasMore() ) {
LDAPEntry nextEntry = null;
try {
nextEntry = searchResults.next();
} catch(LDAPException e ) {
System.out.println("Error: " + e.toString());
continue;
LDAPAttribute attribute =
nextEntry.getAttribute("objectGuid");
if (attribute == null) System.out.println("not
returned");
attribute = nextEntry.getAttribute("GUID");
if (attribute == null) System.out.println("not
returned");
attribute = nextEntry.getAttribute("cn");
if (attribute == null) System.out.println("not
returned");
else System.out.println("returned");
} catch( LDAPException e ) {
System.out.println("Error " + e.toString() );
If I run it, i get this result:
not returned
not returned
returned
Thank you,
Natan Sanson
nsanson
nsanson's Profile: http://forums.novell.com/member.php?userid=1637
View this thread: http://forums.novell.com/showthread.php?t=410589

Answer 1

So I did it this way:
LDAPAttribute attr = nextEntry.getAttribute( "GUID" );
Enumeration allValues = attr.getByteValues();
if ( allValues != null )
System.out.println( getGUID( allValues ) );
public static String getGUID( Enumeration values )
String returnThis = "";
while ( values.hasMoreElements() )
int offset = 0;
byte Value[] = ( byte[] ) values.nextElement();
while ( offset < Value.length )
int val = Value[offset++] & 0xff;
String s = Integer.toHexString( val );
if ( s.length() == 1 )
s = "0" + s;
returnThis = returnThis + s + " ";
return returnThis;
-jim
On 5/14/2010 11:56 AM, nsanson wrote:
>
> Hi to all, I need some help with java to retrieve the eDirectory GUID. I
> know it's a binary data field and I need to decode it to read the value,
> but I'm not able to retrieve anything, even if I name the attribute
> because it is operational.
>
> This is my code. What am I doing wrong?
>
> import com.novell.ldap.*;
>
> import java.io.UnsupportedEncodingException;
>
>
> public class GuidReader {
> public static void main( String[] args ) {
> String loginDN = "cn=admin,o=system";
> String password = "MYPASSWORD";
> String searchBase = "MYCONTEXT";
> String searchFilter = "(cn=MYUSERNAME)";
> int searchScope = LDAPConnection.SCOPE_SUB;
>
> LDAPConnection lc = new LDAPConnection();
> try {
> lc.connect( "MYIPADDRESS", 389 );
> try {
> lc.bind( LDAPConnection.LDAP_V3, loginDN,
> password.getBytes("UTF8"));
> } catch (UnsupportedEncodingException e1) {
> // TODO Auto-generated catch block
> e1.printStackTrace();
> }
> LDAPSearchResults searchResults = lc.search(
> searchBase,
> searchScope,
> searchFilter,
> null,
> false );
> while ( searchResults.hasMore() ) {
> LDAPEntry nextEntry = null;
> try {
> nextEntry = searchResults.next();
> } catch(LDAPException e ) {
> System.out.println("Error: " + e.toString());
> continue;
> }
> LDAPAttribute attribute =
> nextEntry.getAttribute("objectGuid");
> if (attribute == null) System.out.println("not
> returned");
> attribute = nextEntry.getAttribute("GUID");
> if (attribute == null) System.out.println("not
> returned");
> attribute = nextEntry.getAttribute("cn");
> if (attribute == null) System.out.println("not
> returned");
> else System.out.println("returned");
>
>
> } catch( LDAPException e ) {
> System.out.println("Error " + e.toString() );
> }
> }
>
> }
>
>
> If I run it, i get this result:
>
> not returned
> not returned
> returned
>
> Thank you,
>
> Natan Sanson
>
>