Sort search results can be obtained using SortControl API - Java JNDI

Java examples for JNDI:LDAP

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Description

Sort search results can be obtained using SortControl API

Demo Code

import java.util.Hashtable;
import java.io.*;

import javax.naming.*;
import javax.naming.directory.*;
import javax.naming.ldap.*;

/**/* w w  w  .ja v  a 2 s  .  c  o  m*/
 * Shows how sorted search results can be obtained
 * using SortControl API
 */
class SortedResults {

    public static void main(String[] args) throws IOException {

        // Set up environment for creating initial context
        Hashtable<String, Object> env = new Hashtable<String, Object>(11);
        env.put(Context.INITIAL_CONTEXT_FACTORY,
                "com.sun.jndi.ldap.LdapCtxFactory");
        env.put(Context.PROVIDER_URL,
                "ldap://localhost:389/ou=People,o=JNDITutorial");

        try {
            // Create initial context with no connection request controls
            LdapContext ctx = new InitialLdapContext(env, null);

            // Create a sort control that sorts based on CN
            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
            System.out.println("---->sort by cn");
            while (results != null && results.hasMore()) {
                // Display an entry
                SearchResult entry = (SearchResult) results.next();
                System.out.println(entry.getName());

                // 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 when no longer needed
            ctx.close();
        } catch (NamingException e) {
            e.printStackTrace();
        }
    }
}

/*
 * Copyright (c) 1995, 2008, Oracle and/or its affiliates. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *   - Neither the name of Oracle or the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

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