mapbuilder.java

torque服务器源代码

package org.apache.torque.map;

/* ====================================================================
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2001 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Apache" and "Apache Software Foundation" and
 *    "Apache Turbine" must not be used to endorse or promote products
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 *    written permission, please contact [e-mail].
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 * 5. Products derived from this software may not be called "Apache",
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 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

/**
 * MapBuilders are wrappers around DatabaseMaps.  You use a MapBuilder
 * to populate a DatabaseMap.  You should implement this interface to create
 * your own MapBuilders.  The MapBuilder interface exists to support ease of
 * casting.
 *
 * @author <a href="mailto:[e-mail]">John D. McNally</a>
 * @version $Id: MapBuilder.java,v 1.5 2001/10/15 16:53:10 jmcnally Exp $
 */
public interface MapBuilder
{
    /**
     * Build up the database mapping.
     *
     * @exception Exception Couldn't build mapping.
     */
    void doBuild()
        throws Exception;

    /**
     * Tells us if the database mapping is built so that we can avoid
     * re-building it repeatedly.
     *
     * @return Whether the DatabaseMap is built.
     */
    boolean isBuilt();

    /**
     * Gets the database mapping this map builder built.
     *
     * @return A DatabaseMap.
     */
    DatabaseMap getDatabaseMap();
}