/*
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you under the Apache License, Version 2.0 (the
 *  "License"); you may not use this file except in compliance
 *  with the License.  You may obtain a copy of the License at
 *  
 *    http://www.apache.org/licenses/LICENSE-2.0
 *  
 *  Unless required by applicable law or agreed to in writing,
 *  software distributed under the License is distributed on an
 *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 *  KIND, either express or implied.  See the License for the
 *  specific language governing permissions and limitations
 *  under the License. 
 *  
 */
package org.apache.directory.shared.ldap.extras.extended;


import org.apache.directory.shared.i18n.I18n;
import org.apache.directory.shared.ldap.model.message.ExtendedResponseImpl;
import org.apache.directory.shared.ldap.model.message.ResultCodeEnum;


/**
 * The response sent back from the server when a {@link GracefulShutdownRequest}
 * extended operation is sent. Delivery of this response may block until all
 * connected clients are sent a GracefulDisconnect unsolicited notification.
 * 
 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
 */
public class GracefulShutdownResponse extends ExtendedResponseImpl
{
    /** The Constant serialVersionUID. */
    private static final long serialVersionUID = -3824715470944544189L;

    /** The OID for the graceful shutdown extended operation response. */
    public static final String EXTENSION_OID = "1.3.6.1.4.1.18060.0.1.4";

    /** The empty response. */
    private static final byte[] EMPTY_RESPONSE = new byte[0];


    /**
     * Instantiates a new graceful shutdown response.
     *
     * @param messageId the message id
     * @param rcode the result code
     */
    public GracefulShutdownResponse( int messageId, ResultCodeEnum rcode )
    {
        super( messageId, EXTENSION_OID );

        switch ( rcode )
        {
            case SUCCESS:
                break;

            case OPERATIONS_ERROR:
                break;

            case INSUFFICIENT_ACCESS_RIGHTS:
                break;

            default:
                throw new IllegalArgumentException( I18n.err( I18n.ERR_04166, ResultCodeEnum.SUCCESS,
                    ResultCodeEnum.OPERATIONS_ERROR, ResultCodeEnum.INSUFFICIENT_ACCESS_RIGHTS ) );
        }

        super.getLdapResult().setMatchedDn( null );
        super.getLdapResult().setResultCode( rcode );
    }


    /**
     * Instantiates a new graceful shutdown response.
     *
     * @param messageId the message id
     */
    public GracefulShutdownResponse( int messageId )
    {
        super( messageId, EXTENSION_OID );
        super.getLdapResult().setMatchedDn( null );
        super.getLdapResult().setResultCode( ResultCodeEnum.SUCCESS );
    }


    // ------------------------------------------------------------------------
    // ExtendedResponse Interface Method Implementations
    // ------------------------------------------------------------------------

    /**
     * Gets the reponse OID specific encoded response values.
     * 
     * @return the response specific encoded response values.
     */
    public byte[] getResponse()
    {
        return EMPTY_RESPONSE;
    }


    /**
     * Sets the reponse OID specific encoded response values.
     * 
     * @param value
     *            the response specific encoded response values.
     */
    public void setResponse( byte[] value )
    {
        // do nothing here instead
    }


    /**
     * Gets the OID uniquely identifying this extended response (a.k.a. its
     * name).
     * 
     * @return the OID of the extended response type.
     */
    public String getResponseName()
    {
        return EXTENSION_OID;
    }


    /**
     * Sets the OID uniquely identifying this extended response (a.k.a. its
     * name).
     * 
     * @param oid
     *            the OID of the extended response type.
     */
    public void setResponseName( String oid )
    {
        throw new UnsupportedOperationException( I18n.err( I18n.ERR_04168, EXTENSION_OID ) );
    }


    /**
     * {@inheritDoc}
     */
    @Override
    public int hashCode()
    {
        int hash = 37;
        // Seems simple but look at the equals() method ...
        hash = hash * 17 + getClass().getName().hashCode();

        return hash;
    }


    /**
     * {@inheritDoc}
     */
    @Override
    public boolean equals( Object obj )
    {
        if ( obj == this )
        {
            return true;
        }

        return ( obj instanceof GracefulShutdownResponse );
    }
}