fileaccess.java

hsql是很有名的嵌入式数据库

/* Copyright (c) 2001-2005, The HSQL Development Group
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * Neither the name of the HSQL Development Group nor the names of its
 * contributors may be used to endorse or promote products derived from this
 * software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL HSQL DEVELOPMENT GROUP, HSQLDB.ORG,
 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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package org.hsqldb.lib;

import java.io.InputStream;
import java.io.OutputStream;

/**
 * Interface for abstraction of file access.
 *
 * @author  Ocke Janssen [e-mail]
 * @version 1.8.0
 * @since 1.80
 */
public interface FileAccess {

    int ELEMENT_READ         = 1;
    int ELEMENT_SEEKABLEREAD = 3;
    int ELEMENT_WRITE        = 4;
    int ELEMENT_READWRITE    = 7;
    int ELEMENT_TRUNCATE     = 8;

    InputStream openInputStreamElement(java.lang.String streamName)
    throws java.io.IOException;

    OutputStream openOutputStreamElement(java.lang.String streamName)
    throws java.io.IOException;

    boolean isStreamElement(java.lang.String elementName);

    void createParentDirs(java.lang.String filename);

    void removeElement(java.lang.String filename)
    throws java.util.NoSuchElementException, java.io.IOException;

    void renameElement(java.lang.String oldName,
                       java.lang.String newName)
                       throws java.util.NoSuchElementException,
                              java.io.IOException;

    public interface FileSync {
        void sync() throws java.io.IOException;
    }

    FileSync getFileSync(OutputStream os) throws java.io.IOException;
}