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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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package org.apache.james.transport.matchers;

import org.apache.mailet.GenericMatcher;
import org.apache.mailet.Mail;
import org.apache.mailet.MailAddress;

import java.util.Collection;

/**
 * <P>Matches mails that are sent by a null sender.</P>
 * <PRE><CODE>
 * <mailet match="SenderIsNull" class="<any-class>">
 * </CODE></PRE>
 *
 * @version CVS $Revision: 494012 $ $Date: 2007-01-08 11:23:58 +0100 (Mo, 08 Jan 2007) $
 * @since 2.2.0
 */
public class SenderIsNull extends GenericMatcher {

    public Collection match(Mail mail) {
        if (mail.getSender() == null) {
            return mail.getRecipients();
        } else {
            return null;
        }
    }
}