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 * Licensed to the Apache Software Foundation (ASF) under one   *
 * or more contributor license agreements.  See the NOTICE file *
 * distributed with this work for additional information        *
 * 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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 *   http://www.apache.org/licenses/LICENSE-2.0                 *
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 * 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.protocols.pop3.mailbox;

import java.io.IOException;
import java.io.InputStream;
import java.util.List;

/**
 * A Mailbox which is used in POP3 to retrieve messages
 */
public interface Mailbox {
    /**
     * Return the full message (headers + body) as {@link InputStream}
     * for the given <code>uid</code>.
     * @exception IOException If message can not be found or is inaccessible
     */
    InputStream getMessage(String uid) throws IOException;

    /**
     * Return a immutable {@link List} which holds the {@link MessageMetaData}
     * for all messages in the {@link Mailbox}
     */
    List<MessageMetaData> getMessages() throws IOException;

    /**
     * Remove the messages with the given uids
     */
    void remove(String... uids) throws IOException;

    /**
     * Return the identifier for the mailbox. This MUST not change
     */
    String getIdentifier() throws IOException;

    /**
     * Close the mailbox, Any futher attempt to access or change the
     * {@link Mailbox}'s content will fail
     */
    void close() throws IOException;

}
