netscape.ldap

Class LDAPSearchResults

Implemented Interfaces:
Enumeration, java.io.Serializable

public class LDAPSearchResults
extends java.lang.Object
implements Enumeration, java.io.Serializable

The results of an LDAP search operation, represented as an enumeration. Note that you can only iterate through this enumeration once: if you need to use these results more than once, make sure to save the results in a separate location.

You can also use the results of a search in progress to abandon that search operation.

Version:
1.0
See Also:
netscape.ldap.LDAPConnection.search(java.lang.String, int, java.lang.String, java.lang.String[], boolean), LDAPConnection.abandon(LDAPSearchResults), Serialized Form

Constructor Summary

LDAPSearchResults()
Constructs an enumeration of search results.

Method Summary

int
getCount()
Returns a count of queued search results immediately available for processing.
LDAPControl[]
getResponseControls()
Returns the controls returned with this search result.
boolean
hasMoreElements()
Returns true if there are more search results to be returned.
LDAPEntry
next()
Returns the next LDAP entry from the search results and throws an exception if the next result is a referral, or if a sizelimit or timelimit error occurred.
Object
nextElement()
Returns the next result from a search.
void
sort(LDAPEntryComparator compare)
Sorts the search results.

Constructor Details

LDAPSearchResults

public LDAPSearchResults()
Constructs an enumeration of search results. Note that this does not actually generate the results; you need to call LDAPConnection.search to perform the search and get the results.
See Also:
netscape.ldap.LDAPConnection.search(java.lang.String, int, java.lang.String, java.lang.String[], boolean)

Method Details

getCount

public int getCount()
Returns a count of queued search results immediately available for processing. A search result is either a search entry or an exception. If the search is asynchronous (batch size not 0), this reports the number of results received so far.
Returns:
count of search results immediatly available for processing

getResponseControls

public LDAPControl[] getResponseControls()
Returns the controls returned with this search result. If any control is registered with LDAPControl, an attempt is made to instantiate the control. If the instantiation fails, the control is returned as a basic LDAPControl.
Returns:
an array of type LDAPControl.

hasMoreElements

public boolean hasMoreElements()
Returns true if there are more search results to be returned. You can use this method in conjunction with the nextElement or next methods to iterate through each entry in the results. For example:
 LDAPSearchResults res = ld.search( MY_SEARCHBASE,
                         LDAPConnection.SCOPE_BASE, MY_FILTER,
                         null, false );
 while ( res.hasMoreElements() ) {
   LDAPEntry findEntry = (LDAPEntry)res.nextElement();
   ...
 }
 
Returns:
true if there are more search results.

next

public LDAPEntry next()
            throws LDAPException
Returns the next LDAP entry from the search results and throws an exception if the next result is a referral, or if a sizelimit or timelimit error occurred.

You can use this method in conjunction with the hasMoreElements method to iterate through each entry in the search results. For example:

 LDAPSearchResults res = ld.search( MY_SEARCHBASE,
                         LDAPConnection.SCOPE_BASE, MY_FILTER,
                         null, false );
 while ( res.hasMoreElements() ) {
   try {
     LDAPEntry findEntry = res.next();
   } catch ( LDAPReferralException e ) {
     LDAPUrl refUrls[] = e.getURLs();
     for ( int i = 0; i <32refUrls.length; i++ ) {
     // Your code for handling referrals
     }
     continue;
   } catch ( LDAPException e ) {
     // Your code for handling errors on limits exceeded 
     continue; 
   } 
   ...
 }
 
Returns:
the next LDAP entry in the search results.

nextElement

public Object nextElement()
Returns the next result from a search. You can use this method in conjunction with the hasMoreElements method to iterate through all elements in the search results.

Make sure to cast the returned element as the correct type. For example:

 LDAPSearchResults res = ld.search( MY_SEARCHBASE,
                         LDAPConnection.SCOPE_BASE, MY_FILTER,
                         null, false );
 while ( res.hasMoreElements() ) {
   Object o = res.nextElement(); 
   if ( o instanceof LDAPEntry ) { 
     LDAPEntry findEntry = (LDAPEntry)o; 
     ... 
   } else if ( o instanceof LDAPReferralException ) { 
     LDAPReferralException e = (LDAPReferralException)o; 
     LDAPUrl refUrls[] = e.getURLs(); 
     ... 
   } else if ( o instanceof LDAPException ) { 
     LDAPException e = (LDAPException)o; 
     ... 
   } 
 } 
 
Returns:
the next element in the search results.

sort

public void sort(LDAPEntryComparator compare)
Sorts the search results.

The comparator (LDAPEntryComparator) determines the sort order used. For example, if the comparator uses the uid attribute for comparison, the search results are sorted according to uid.

The following section of code sorts results in ascending order, first by surname and then by common name.

 String[]  sortAttrs = {"sn", "cn"};
 boolean[] ascending = {true, true};

 LDAPConnection ld = new LDAPConnection();
 ld.connect( ... );
 LDAPSearchResults res = ld.search( ... );
 res.sort( new LDAPCompareAttrNames(sortAttrs, ascending) );
 
NOTE: If the search results arrive asynchronously, the sort method blocks until all the results are returned.

If some of the elements of the Enumeration have already been fetched, the cursor is reset to the (new) first element.

Parameters:
compare - comparator used to determine the sort order of the results