old_trunk/protocol-ldap/src/main/java/org/apache/directory/server/ldap/handlers/DefaultDeleteHandler.java

/*
 *  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.server.ldap.handlers;


import javax.naming.Context;
import javax.naming.NamingException;
import javax.naming.ReferralException;
import javax.naming.ldap.LdapContext;

import org.apache.directory.shared.ldap.exception.LdapException;
import org.apache.directory.shared.ldap.message.DeleteRequest;
import org.apache.directory.shared.ldap.message.LdapResult;
import org.apache.directory.shared.ldap.message.ManageDsaITControl;
import org.apache.directory.shared.ldap.message.ReferralImpl;
import org.apache.directory.shared.ldap.message.ResultCodeEnum;
import org.apache.directory.shared.ldap.name.LdapDN;
import org.apache.directory.shared.ldap.util.ExceptionUtils;
import org.apache.mina.common.IoSession;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;


/**
 * A single reply handler for {@link DeleteRequest}s.
 *
 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
 * @version $Rev$
 */
public class DefaultDeleteHandler extends DeleteHandler
{
    private static final Logger LOG = LoggerFactory.getLogger( DeleteHandler.class );

    /** Speedup for logs */
    private static final boolean IS_DEBUG = LOG.isDebugEnabled();


    public void deleteMessageReceived( IoSession session, DeleteRequest req ) throws Exception
    {
        LdapResult result = req.getResultResponse().getLdapResult();

        try
        {
            // protect against insecure conns when confidentiality is required 
            if ( ! isConfidentialityRequirementSatisfied( session ) )
            {
            	result.setResultCode( ResultCodeEnum.CONFIDENTIALITY_REQUIRED );
            	result.setErrorMessage( "Confidentiality (TLS secured connection) is required." );
            	session.write( req.getResultResponse() );
            	return;
            }
            
            LdapContext ctx = getSessionRegistry().getLdapContext( session, null, true );
            if ( req.getControls().containsKey( ManageDsaITControl.CONTROL_OID ) )
            {
                ctx.addToEnvironment( Context.REFERRAL, "ignore" );
            }
            else
            {
                ctx.addToEnvironment( Context.REFERRAL, "throw" );
            }

            // Inject controls into the context
            setRequestControls( ctx, req );

            ctx.destroySubcontext( req.getName() );
            result.setResultCode( ResultCodeEnum.SUCCESS );
            req.getResultResponse().addAll( ctx.getResponseControls() );
            session.write( req.getResultResponse() );
        }
        catch ( ReferralException e )
        {
            ReferralImpl refs = new ReferralImpl();
            result.setReferral( refs );
            result.setResultCode( ResultCodeEnum.REFERRAL );
            result.setErrorMessage( "Encountered referral attempting to handle delete request." );
            /* coming up null causing a NPE */
            // result.setMatchedDn( e.getResolvedName().toString() );
            do
            {
                refs.addLdapUrl( ( String ) e.getReferralInfo() );
            }
            while ( e.skipReferral() );
            session.write( req.getResultResponse() );
        }
        catch ( NamingException e )
        {
            String msg = "failed to delete entry " + req.getName() + ": " + e.getMessage();

            if ( IS_DEBUG )
            {
                msg += ":\n" + ExceptionUtils.getStackTrace( e );
            }

            ResultCodeEnum code;
            if ( e instanceof LdapException )
            {
                code = ( ( LdapException ) e ).getResultCode();
            }
            else
            {
                code = ResultCodeEnum.getBestEstimate( e, req.getType() );
            }

            result.setResultCode( code );
            result.setErrorMessage( msg );
            if ( ( e.getResolvedName() != null )
                && ( ( code == ResultCodeEnum.NO_SUCH_OBJECT ) || ( code == ResultCodeEnum.ALIAS_PROBLEM )
                    || ( code == ResultCodeEnum.INVALID_DN_SYNTAX ) || ( code == ResultCodeEnum.ALIAS_DEREFERENCING_PROBLEM ) ) )
            {
                result.setMatchedDn( (LdapDN)e.getResolvedName() );
            }

            session.write( req.getResultResponse() );
        }
    }
}