how to do the equivalent of an LDAP "compare" : Search « JNDI LDAP « Java

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how to do the equivalent of an LDAP "compare"

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import java.util.Hashtable;

import javax.naming.Context;
import javax.naming.NamingEnumeration;
import javax.naming.NamingException;
import javax.naming.directory.DirContext;
import javax.naming.directory.InitialDirContext;
import javax.naming.directory.SearchControls;

/**
 * Demonstrates how to do the equivalent of an LDAP "compare".
 * 
 * usage: java Compare
 */
class Compare {
  public static void main(String[] args) {

    // 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/o=JNDITutorial");

    try {
      // Create initial context
      DirContext ctx = new InitialDirContext(env);

      // Value of attribute
      byte[] key = { (byte) 0x61, (byte) 0x62, (byte) 0x63, (byte) 0x64,
          (byte) 0x65, (byte) 0x66, (byte) 0x67 };

      // Set up search controls
      SearchControls ctls = new SearchControls();
      ctls.setReturningAttributes(new String[0]); // return no attrs
      ctls.setSearchScope(SearchControls.OBJECT_SCOPE); // search object only

      // Invoke search method that will use the LDAP "compare" operation
      NamingEnumeration answer = ctx.search("cn=S. User, ou=NewHires",
          "(mySpecialKey={0})", new Object[] { key }, ctls);

      // Print the answer
      // FilterArgs.printSearchEnumeration(answer);

      // Close the context when we're done
      ctx.close();
    } catch (NamingException e) {
      e.printStackTrace();
    }
  }
}

 

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