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 * 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   *
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 * software distributed under the License is distributed on an  *
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY       *
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package org.apache.james.imap.processor.base;

import org.apache.commons.logging.Log;
import org.apache.james.imap.api.ImapCommand;
import org.apache.james.imap.api.ImapMessage;
import org.apache.james.imap.api.display.HumanReadableText;
import org.apache.james.imap.api.message.request.ImapRequest;
import org.apache.james.imap.api.message.response.ImapResponseMessage;
import org.apache.james.imap.api.message.response.StatusResponseFactory;
import org.apache.james.imap.api.process.ImapProcessor;
import org.apache.james.imap.api.process.ImapSession;

public class UnknownRequestProcessor implements ImapProcessor {

    private final StatusResponseFactory factory;

    public UnknownRequestProcessor(StatusResponseFactory factory) {
        super();
        this.factory = factory;
    }

    public ImapResponseMessage process(ImapMessage message, ImapSession session) {
        Log logger = session.getLog();
        if (logger != null && logger.isDebugEnabled()) {
            logger.debug("Unknown message: " + message);
        }
        final ImapResponseMessage result;
        if (message instanceof ImapRequest) {
            ImapRequest request = (ImapRequest) message;
            final String tag = request.getTag();
            final ImapCommand command = request.getCommand();
            result = factory.taggedBad(tag, command,
                    HumanReadableText.UNKNOWN_COMMAND);
        } else {
            result = factory.untaggedBad(HumanReadableText.UNKNOWN_COMMAND);
        }
        return result;
    }

    public void process(ImapMessage message, Responder responder,
            ImapSession session) {
        final ImapResponseMessage response = process(message, session);
        responder.respond(response);
    }

}
