senderisnull.java

邮件服务器系统 支持SMTP POP3 是著名的Apache写 有一定的参考价值

/***********************************************************************
 * Copyright (c) 2000-2004 The Apache Software Foundation.             *
 * All rights reserved.                                                *
 * ------------------------------------------------------------------- *
 * Licensed 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.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>
 * &lt;mailet match=&quot;SenderIsNull&quot; class=&quot;&lt;any-class&gt;&quot;&gt;
 * </CODE></PRE>
 *
 * @version CVS $Revision: 1.1.2.2 $ $Date: 2004/03/15 03:54:21 $
 * @since 2.2.0
 */
public class SenderIsNull extends GenericMatcher {

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