/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at
 * trunk/opends/resource/legal-notices/OpenDS.LICENSE
 * or https://OpenDS.dev.java.net/OpenDS.LICENSE.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at
 * trunk/opends/resource/legal-notices/OpenDS.LICENSE.  If applicable,
 * add the following below this CDDL HEADER, with the fields enclosed
 * by brackets "[]" replaced with your own identifying information:
 *      Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 *
 *
 *      Copyright 2009 Sun Microsystems, Inc.
 */

package org.opends.sdk.responses;



import java.util.List;

import org.opends.sdk.DecodeException;
import org.opends.sdk.DecodeOptions;
import org.opends.sdk.ResultCode;
import org.opends.sdk.controls.Control;
import org.opends.sdk.controls.ControlDecoder;



/**
 * A Result is used to indicate the status of an operation performed by the
 * server. A Result is comprised of several fields:
 * <ul>
 * <li>The <b>result code</b> can be retrieved using the method
 * {@link #getResultCode}. This indicates the overall outcome of the operation.
 * In particular, whether or not it succeeded which is indicated using a value
 * of {@link ResultCode#SUCCESS}.
 * <li>The optional <b>diagnostic message</b> can be retrieved using the method
 * {@link #getDiagnosticMessage}. At the server's discretion, a diagnostic
 * message may be included in a Result in order to supplement the result code
 * with additional human-readable information.
 * <li>The optional <b>matched DN</b> can be retrieved using the method
 * {@link #getMatchedDN}. For certain result codes, this is used to indicate to
 * the client the last entry used in finding the Request's target (or base)
 * entry.
 * <li>The optional <b>referrals</b> can be retrieved using the method
 * {@link #getReferralURIs}. Referrals are present in a Result if the result
 * code is set to {@link ResultCode#REFERRAL}, and it are absent with all other
 * result codes.
 * </ul>
 */
public interface Result extends Response
{
  /**
   * {@inheritDoc}
   */
  Result addControl(Control control) throws UnsupportedOperationException,
      NullPointerException;



  /**
   * Adds the provided referral URI to this result.
   *
   * @param uri
   *          The referral URI to be added.
   * @return This result.
   * @throws UnsupportedOperationException
   *           If this result does not permit referrals to be added.
   * @throws NullPointerException
   *           If {@code uri} was {@code null}.
   */
  Result addReferralURI(String uri) throws UnsupportedOperationException,
      NullPointerException;



  /**
   * Returns the throwable cause associated with this result if available. A
   * cause may be provided in cases where a result indicates a failure due to a
   * client-side error.
   *
   * @return The throwable cause, or {@code null} if none was provided.
   */
  Throwable getCause();



  /**
   * {@inheritDoc}
   */
  <C extends Control> C getControl(ControlDecoder<C> decoder,
      DecodeOptions options) throws NullPointerException, DecodeException;



  /**
   * {@inheritDoc}
   */
  List<Control> getControls();



  /**
   * Returns the diagnostic message associated with this result.
   *
   * @return The diagnostic message, which may be empty if none was provided
   *         (never {@code null}).
   */
  String getDiagnosticMessage();



  /**
   * Returns the matched DN associated with this result.
   *
   * @return The matched DN, which may be empty if none was provided (never
   *         {@code null}).
   */
  String getMatchedDN();



  /**
   * Returns a {@code List} containing the referral URIs included with this
   * result. The returned {@code List} may be modified if permitted by this
   * result.
   *
   * @return A {@code List} containing the referral URIs.
   */
  List<String> getReferralURIs();



  /**
   * Returns the result code associated with this result.
   *
   * @return The result code.
   */
  ResultCode getResultCode();



  /**
   * Indicates whether or not a referral needs to be chased in order to complete
   * the operation.
   * <p>
   * Specifically, this method returns {@code true} if the result code is equal
   * to {@link ResultCode#REFERRAL}.
   *
   * @return {@code true} if a referral needs to be chased, otherwise {@code
   *         false}.
   */
  boolean isReferral();



  /**
   * Indicates whether or not the request succeeded or not. This method will
   * return {code true} for all non-error responses.
   *
   * @return {@code true} if the request succeeded, otherwise {@code false}.
   */
  boolean isSuccess();



  /**
   * Sets the throwable cause associated with this result if available. A cause
   * may be provided in cases where a result indicates a failure due to a
   * client-side error.
   *
   * @param cause
   *          The throwable cause, which may be {@code null} indicating that
   *          none was provided.
   * @return This result.
   * @throws UnsupportedOperationException
   *           If this result does not permit the cause to be set.
   */
  Result setCause(Throwable cause) throws UnsupportedOperationException;



  /**
   * Sets the diagnostic message associated with this result.
   *
   * @param message
   *          The diagnostic message, which may be empty or {@code null}
   *          indicating that none was provided.
   * @return This result.
   * @throws UnsupportedOperationException
   *           If this result does not permit the diagnostic message to be set.
   */
  Result setDiagnosticMessage(String message)
      throws UnsupportedOperationException;



  /**
   * Sets the matched DN associated with this result.
   *
   * @param dn
   *          The matched DN associated, which may be empty or {@code null}
   *          indicating that none was provided.
   * @return This result.
   * @throws UnsupportedOperationException
   *           If this result does not permit the matched DN to be set.
   */
  Result setMatchedDN(String dn) throws UnsupportedOperationException;



  /**
   * Sets the result code associated with this result.
   *
   * @param resultCode
   *          The result code.
   * @return This result.
   * @throws UnsupportedOperationException
   *           If this result does not permit the result code to be set.
   * @throws NullPointerException
   *           If {@code resultCode} was {@code null}.
   */
  Result setResultCode(ResultCode resultCode)
      throws UnsupportedOperationException, NullPointerException;

}