nntprepository.java

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 * Copyright (c) 2000-2004 The Apache Software Foundation.             *
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 * ------------------------------------------------------------------- *
 * 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:                                *
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 *     http://www.apache.org/licenses/LICENSE-2.0                      *
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package org.apache.james.nntpserver.repository;

import java.io.InputStream;
import java.util.Date;
import java.util.Iterator;

/**
 * Abstraction of entire NNTP Repository.
 */
public interface NNTPRepository {

    /**
     * Gets the group with the specified name from within the repository.
     *
     * @param groupName the name of the group to retrieve
     *
     * @return the group
     */
    NNTPGroup getGroup(String groupName);

    /**
     * Gets the article with the specified id from within the repository.
     *
     * @param id the id of the article to retrieve
     *
     * @return the article
     */
    NNTPArticle getArticleFromID(String id);

    /**
     * Creates an article in the repository from the data in the reader.
     * TODO: Change this to be more OO and pass in a MimeMessage
     *
     * @param in the InputStream that serves as a source for the message data.
     */
    void createArticle(InputStream in);

    /**
     * Gets all groups that match the wildmat string
     *
     * @param wildmat the wildmat parameter
     *
     * @return an iterator containing the groups retrieved
     */
    Iterator getMatchedGroups(String wildmat);

    /**
     * Gets all groups added since the specified date
     *
     * @param dt the Date that serves as a lower bound
     *
     * @return an iterator containing the groups retrieved
     */
    Iterator getGroupsSince(Date dt);

    /**
     * Gets all articles posted since the specified date
     *
     * @param dt the Date that serves as a lower bound
     *
     * @return an iterator containing the articles retrieved
     */
    Iterator getArticlesSince(Date dt);

    /**
     * Returns whether this repository is read only.
     *
     * @return whether this repository is read only
     */
    boolean isReadOnly();

    /**
     * Returns the ordered array of header names (including the trailing colon on each)
     * returned in overview format for articles stored in this repository.
     */
    String[] getOverviewFormat();

}