| Requests that the results of a search operation be returned by the LDAP
server in batches of a specified size.
The requestor controls the rate at which batches are returned by the rate
at which it invokes search operations.
The following code sample shows how the class may be used:
// Open an LDAP association
LdapContext ctx = new InitialLdapContext();
// Activate paged results
int pageSize = 20; // 20 entries per page
byte[] cookie = null;
int total;
ctx.setRequestControls(new Control[]{
new PagedResultsControl(pageSize, Control.CRITICAL) });
do {
// Perform the search
NamingEnumeration results =
ctx.search("", "(objectclass=*)", new SearchControls());
// Iterate over a batch of search results
while (results != null && results.hasMore()) {
// Display an entry
SearchResult entry = (SearchResult)results.next();
System.out.println(entry.getName());
System.out.println(entry.getAttributes());
// Handle the entry's response controls (if any)
if (entry instanceof HasControls) {
// ((HasControls)entry).getControls();
}
}
// Examine the paged results control response
Control[] controls = ctx.getResponseControls();
if (controls != null) {
for (int i = 0; i < controls.length; i++) {
if (controls[i] instanceof PagedResultsResponseControl) {
PagedResultsResponseControl prrc =
(PagedResultsResponseControl)controls[i];
total = prrc.getResultSize();
cookie = prrc.getCookie();
} else {
// Handle other response controls (if any)
}
}
}
// Re-activate paged results
ctx.setRequestControls(new Control[]{
new PagedResultsControl(pageSize, cookie, Control.CRITICAL) });
} while (cookie != null);
// Close the LDAP association
ctx.close();
...
This class implements the LDAPv3 Control for paged-results as defined in
RFC 2696.
The control's value has the following ASN.1 definition:
realSearchControlValue ::= SEQUENCE {
size INTEGER (0..maxInt),
-- requested page size from client
-- result set size estimate from server
cookie OCTET STRING
}
since:
1.5
See Also: PagedResultsResponseControl
author:
Vincent Ryan | 