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 * regarding copyright ownership.  The ASF licenses this file   *
 * to you under the Apache License, Version 2.0 (the            *
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 * software distributed under the License is distributed on an  *
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package org.apache.james.imap.encode.base;

import java.io.IOException;

import org.apache.james.imap.api.ImapMessage;
import org.apache.james.imap.api.process.ImapSession;
import org.apache.james.imap.encode.ImapEncoder;
import org.apache.james.imap.encode.ImapResponseComposer;
import org.slf4j.Logger;

/**
 * {@link ImapEncoder} which should get added to the end of the encoder chain.
 * It will handle the response to the client about the unknown
 * {@link ImapMessage}
 */
public class EndImapEncoder implements ImapEncoder {

    /**
     * @see
     * org.apache.james.imap.encode.ImapEncoder#encode(org.apache.james.imap.api.ImapMessage, org.apache.james.imap.encode.ImapResponseComposer,
     * org.apache.james.imap.api.process.ImapSession)
     */
    public void encode(ImapMessage message, ImapResponseComposer composer, ImapSession session) throws IOException {
        final Logger logger = session.getLog();
        if (logger.isWarnEnabled()) {
            logger.warn("Unknown message " + message);
        }
        if (logger.isDebugEnabled()) {
            logger.debug("Chain end reached for " + message);
        }
        composer.untaggedNoResponse("Unknown message in pipeline", null);
    }
}