persistentstore.java

hsql是很有名的嵌入式数据库

/* Copyright (c) 2001-2005, The HSQL Development Group
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 * 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"
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package org.hsqldb.persist;

import java.io.IOException;

import org.hsqldb.rowio.RowInputInterface;

/**
 * Interface for a store for CachedObject object.
 *
 * @author fredt@users
 * @version 1.8.0
 * @since 1.8.0
 */
public interface PersistentStore {

    int INT_STORE_SIZE  = 4;
    int LONG_STORE_SIZE = 8;

    CachedObject get(int key);

    CachedObject getKeep(int key);

    int getStorageSize(int key);

    void add(CachedObject object) throws IOException;

    void restore(CachedObject object) throws IOException;

    CachedObject get(RowInputInterface in) throws IOException;

    CachedObject getNewInstance(int size) throws IOException;

    void remove(int i);

    void release(int i);

    void commit(CachedObject object) throws IOException;
}