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The UnboundID LDAP SDK for Java is a fast, comprehensive, and easy-to-use Java API for communicating with LDAP directory servers and performing related tasks like reading and writing LDIF, encoding and decoding data using base64 and ASN.1 BER, and performing secure communication. This package contains the Commercial Edition of the LDAP SDK, which includes all of the general-purpose functionality contained in the Standard Edition, plus additional functionality specific to UnboundID server products.

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/*
 * Copyright 2009-2016 UnboundID Corp.
 * All Rights Reserved.
 */
/*
 * Copyright (C) 2015-2016 UnboundID Corp.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License (GPLv2 only)
 * or the terms of the GNU Lesser General Public License (LGPLv2.1 only)
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see .
 */
package com.unboundid.ldap.sdk.unboundidds.controls;



import com.unboundid.asn1.ASN1Element;
import com.unboundid.asn1.ASN1OctetString;
import com.unboundid.ldap.sdk.Control;
import com.unboundid.ldap.sdk.LDAPException;
import com.unboundid.ldap.sdk.ResultCode;
import com.unboundid.util.NotMutable;
import com.unboundid.util.ThreadSafety;
import com.unboundid.util.ThreadSafetyLevel;

import static com.unboundid.ldap.sdk.unboundidds.controls.ControlMessages.*;
import static com.unboundid.util.Debug.*;
import static com.unboundid.util.StaticUtils.*;



/**
 * 
 *   NOTE:  This class is part of the Commercial Edition of the UnboundID
 *   LDAP SDK for Java.  It is not available for use in applications that
 *   include only the Standard Edition of the LDAP SDK, and is not supported for
 *   use in conjunction with non-UnboundID products.
 * 
 * This class provides an implementation of an LDAP control which can be
 * included in a search request to indicate that search result entries should be
 * returned along with related entries based on a given set of criteria, much
 * like an SQL join in a relational database.
 * 


 * Example
 * Consider the case in which user entries include an account number, but
 * additional information about those accounts are available in separate
 * entries.    If you wish to retrieve both the user and account entries for a
 * user given only a user ID, then you may accomplish that using the join
 * request control as follows:
 *  * SearchRequest searchRequest = new SearchRequest(
 *      "ou=People,dc=example,dc=com", SearchScope.SUB,
 *      Filter.createEqualityFilter("uid", userID));
 * searchRequest.addControl(new JoinRequestControl(new JoinRequestValue(
 *      JoinRule.createEqualityJoin("accountNumber", "accountNumber", false),
 *      JoinBaseDN.createUseCustomBaseDN("ou=Accounts,dc=example,dc=com"),
 *      SearchScope.SUB, DereferencePolicy.NEVER, null,
 *      Filter.createEqualityFilter("objectClass", "accountEntry"),
 *      new String[0], false, null)));
 * SearchResult searchResult = connection.search(searchRequest);
 *
 * for (SearchResultEntry userEntry : searchResult.getSearchEntries())
 * {
 *   JoinResultControl c = JoinResultControl.get(userEntry);
 *   for (JoinedEntry accountEntry : c.getJoinResults())
 *   {
 *     // User userEntry was joined with account accountEntry
 *   }
 * }
 * 
 */
@NotMutable()
@ThreadSafety(level=ThreadSafetyLevel.COMPLETELY_THREADSAFE)
public final class JoinRequestControl
       extends Control
{
  /**
   * The OID (1.3.6.1.4.1.30221.2.5.9) for the join request control.
   */
  public static final String JOIN_REQUEST_OID = "1.3.6.1.4.1.30221.2.5.9";



  /**
   * The serial version UID for this serializable class.
   */
  private static final long serialVersionUID = -1321645105838145996L;



  // The join request value for this control.
  private final JoinRequestValue joinRequestValue;



  /**
   * Creates a new join request control with the provided join request value.
   *
   * @param  joinRequestValue  The join request value to use for this control.
   */
  public JoinRequestControl(final JoinRequestValue joinRequestValue)
  {
    super(JOIN_REQUEST_OID, true,
          new ASN1OctetString(joinRequestValue.encode().encode()));

    this.joinRequestValue = joinRequestValue;
  }



  /**
   * Creates a new join request control which is decoded from the provided
   * generic control.
   *
   * @param  control  The generic control to be decoded as a join request
   *                  control.
   *
   * @throws  LDAPException  If the provided control cannot be decoded as a
   *                         virtual attributes only request control.
   */
  public JoinRequestControl(final Control control)
         throws LDAPException
  {
    super(control);

    final ASN1OctetString value = control.getValue();
    if (value == null)
    {
      throw new LDAPException(ResultCode.DECODING_ERROR,
           ERR_JOIN_REQUEST_CONTROL_NO_VALUE.get());
    }

    final ASN1Element valueElement;
    try
    {
      valueElement = ASN1Element.decode(value.getValue());
    }
    catch (Exception e)
    {
      debugException(e);

      throw new LDAPException(ResultCode.DECODING_ERROR,
           ERR_JOIN_REQUEST_VALUE_CANNOT_DECODE.get(getExceptionMessage(e)), e);
    }

    joinRequestValue = JoinRequestValue.decode(valueElement);
  }



  /**
   * Retrieves the join request value for this join request control.
   *
   * @return  The join request value for this join request control.
   */
  public JoinRequestValue getJoinRequestValue()
  {
    return joinRequestValue;
  }



  /**
   * {@inheritDoc}
   */
  @Override()
  public String getControlName()
  {
    return INFO_CONTROL_NAME_JOIN_REQUEST.get();
  }



  /**
   * {@inheritDoc}
   */
  @Override()
  public void toString(final StringBuilder buffer)
  {
    buffer.append("JoinRequestControl(value=");
    joinRequestValue.toString(buffer);
    buffer.append(')');
  }
}