java.lang.Object
javax.naming.ldap.BasicControl
javax.naming.ldap.SortControl
- All Implemented Interfaces:
- Serializable,- Control
Requests that the results of a search operation be sorted by the LDAP server
 before being returned.
 The sort criteria are specified using an ordered list of one or more sort
 keys, with associated sort parameters.
 Search results are sorted at the LDAP server according to the parameters
 supplied in the sort control and then returned to the requestor. If sorting
 is not supported at the server (and the sort control is marked as critical)
 then the search operation is not performed and an error is returned.
 
The following code sample shows how the class may be used:
     // Open an LDAP association
     LdapContext ctx = new InitialLdapContext();
     // Activate sorting
     String sortKey = "cn";
     ctx.setRequestControls(new Control[]{
         new SortControl(sortKey, Control.CRITICAL) });
     // Perform a search
     NamingEnumeration results =
         ctx.search("", "(objectclass=*)", new SearchControls());
     // Iterate over 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 sort control response
     Control[] controls = ctx.getResponseControls();
     if (controls != null) {
         for (int i = 0; i < controls.length; i++) {
             if (controls[i] instanceof SortResponseControl) {
                 SortResponseControl src = (SortResponseControl)controls[i];
                 if (! src.isSorted()) {
                     throw src.getException();
                 }
             } else {
                 // Handle other response controls (if any)
             }
         }
     }
     // Close the LDAP association
     ctx.close();
     ...
 This class implements the LDAPv3 Request Control for server-side sorting as defined in RFC 2891. The control's value has the following ASN.1 definition:
     SortKeyList ::= SEQUENCE OF SEQUENCE {
         attributeType     AttributeDescription,
         orderingRule  [0] MatchingRuleId OPTIONAL,
         reverseOrder  [1] BOOLEAN DEFAULT FALSE }
 - Since:
- 1.5
- See Also:
- 
Field SummaryFieldsModifier and TypeFieldDescriptionstatic final StringThe server-side sort control's assigned object identifier is 1.2.840.113556.1.4.473.Fields declared in class javax.naming.ldap.BasicControlcriticality, id, valueFields declared in interface javax.naming.ldap.ControlCRITICAL, NONCRITICAL
- 
Constructor SummaryConstructorsConstructorDescriptionSortControl(String[] sortBy, boolean criticality) Constructs a control to sort on a list of attributes in ascending order.SortControl(String sortBy, boolean criticality) Constructs a control to sort on a single attribute in ascending order.SortControl(SortKey[] sortBy, boolean criticality) Constructs a control to sort on a list of sort keys.
- 
Method SummaryMethods declared in class javax.naming.ldap.BasicControlgetEncodedValue, getID, isCritical
- 
Field Details- 
OIDThe server-side sort control's assigned object identifier is 1.2.840.113556.1.4.473.- See Also:
 
 
- 
- 
Constructor Details- 
SortControlConstructs a control to sort on a single attribute in ascending order. Sorting will be performed using the ordering matching rule defined for use with the specified attribute.- Parameters:
- sortBy- An attribute ID to sort by.
- criticality- If true then the server must honor the control and return the search results sorted as requested or refuse to perform the search. If false, then the server need not honor the control.
- Throws:
- IOException- If an error was encountered while encoding the supplied arguments into a control.
 
- 
SortControlConstructs a control to sort on a list of attributes in ascending order. Sorting will be performed using the ordering matching rule defined for use with each of the specified attributes.- Parameters:
- sortBy- A non-null list of attribute IDs to sort by. The list is in order of highest to lowest sort key precedence.
- criticality- If true then the server must honor the control and return the search results sorted as requested or refuse to perform the search. If false, then the server need not honor the control.
- Throws:
- IOException- If an error was encountered while encoding the supplied arguments into a control.
 
- 
SortControlConstructs a control to sort on a list of sort keys. Each sort key specifies the sort order and ordering matching rule to use.- Parameters:
- sortBy- A non-null list of keys to sort by. The list is in order of highest to lowest sort key precedence.
- criticality- If true then the server must honor the control and return the search results sorted as requested or refuse to perform the search. If false, then the server need not honor the control.
- Throws:
- IOException- If an error was encountered while encoding the supplied arguments into a control.
 
 
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