org.minig.imap.command.Command.java Source code

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Here is the source code for org.minig.imap.command.Command.java

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/* ***** BEGIN LICENSE BLOCK *****
 * Version: GPL 2.0
 *
 * The contents of this file are subject to the GNU General Public
 * License Version 2 or later (the "GPL").
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Initial Developer of the Original Code is
 *   MiniG.org project members
 *
 * ***** END LICENSE BLOCK ***** */

package org.minig.imap.command;

import java.util.List;
import java.util.concurrent.Semaphore;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.mina.common.IoSession;
import org.minig.imap.impl.IMAPResponse;
import org.minig.imap.impl.MailboxNameUTF7Converter;
import org.minig.imap.impl.TagProducer;

public abstract class Command<T> implements ICommand<T> {

    protected Log logger = LogFactory.getLog(getClass());
    protected T data;

    @Override
    public void execute(IoSession session, TagProducer tp, Semaphore lock, List<IMAPResponse> lastResponses) {
        CommandArgument args = buildCommand();

        String cmd = args.getCommandString();
        StringBuilder sb = new StringBuilder(10 + cmd.length());
        sb.append(tp.nextTag());
        sb.append(' ');
        sb.append(cmd);
        String sent = sb.toString();
        if (logger.isDebugEnabled()) {
            logger.debug("=> '" + sent + "'");
        }
        session.write(sent);
        if (args.hasLiteralData()) {
            lock(lock);
            session.write(args.getLiteralData());
        }

    }

    private void lock(Semaphore lock) {
        try {
            lock.acquire();
        } catch (InterruptedException e) {
            logger.error(e.getMessage(), e);
        }
    }

    @Override
    public T getReceivedData() {
        return data;
    }

    protected abstract CommandArgument buildCommand();

    protected static String toUtf7(String mailbox) {
        String ret = MailboxNameUTF7Converter.encode(mailbox);
        StringBuilder b = new StringBuilder(ret.length() + 2);
        b.append("\"");
        b.append(ret);
        b.append("\"");
        return b.toString();
    }

    protected boolean isOk(List<IMAPResponse> rs) {
        return rs.get(rs.size() - 1).isOk();
    }

    protected static String fromUtf7(String mailbox) {
        return MailboxNameUTF7Converter.decode(mailbox);
    }
}