entitybinding.java

来自「berkeleyDB,强大的嵌入式数据,多个数据库的内核」· Java 代码 · 共 50 行

/*-
 * See the file LICENSE for redistribution information.
 *
 * Copyright (c) 2000-2004
 *      Sleepycat Software.  All rights reserved.
 *
 * $Id: EntityBinding.java,v 1.2 2004/06/04 18:24:49 mark Exp $
 */

package com.sleepycat.bind;

import com.sleepycat.db.DatabaseEntry;

/**
 * A binding between a key-value entry pair and an entity object.
 *
 * @author Mark Hayes
 */
public interface EntityBinding {

    /**
     * Converts key and data entry buffers into an entity Object.
     *
     * @param key is the source key entry.
     *
     * @param data is the source data entry.
     *
     * @return the resulting Object.
     */
    Object entryToObject(DatabaseEntry key, DatabaseEntry data);

    /**
     * Extracts the key entry from an entity Object.
     *
     * @param object is the source Object.
     *
     * @param key is the destination entry buffer.
     */
    void objectToKey(Object object, DatabaseEntry key);

    /**
     * Extracts the data entry from an entity Object.
     *
     * @param object is the source Object.
     *
     * @param data is the destination entry buffer.
     */
    void objectToData(Object object, DatabaseEntry data);
}