skinfactory.java

jsp + xmｌ实现ｔｒｅｅｖｉｅｗ

/*
 * ====================================================================
 * The JSP Tree Software License, Version 1.1
 *
 * (this license is derived and fully compatible with the Apache Software
 * License - see http://www.apache.org/LICENSE.txt)
 *
 * Copyright (c) 2002-2005 jsptree.sourceforge.net . 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.
 *
 * 2. 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.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by
 *        jsptree.sourceforge.net (http://jsptree.sourceforge.net/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
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 * 4. The name "JSP Tree" must not be used to endorse or promote
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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
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 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * ====================================================================
 */

package net.sf.jsptree.skin;

import javax.servlet.jsp.JspTagException;

/**
 * The <i>Factory</i> class, which implements this interface  usually is a
 * <i>Singleton</i>, since it needs to keep track of whether or not a
 * particular {@link Skin} instance has been generated yet. It then
 * either returns a new instance or a reference to one it has already generated.
 *
 * @author Vladislav Kamensky
 * @see DefaultSkinFactory
 */
public interface SkinFactory {

    /**
     * Returns reference to {@link Skin} instance by specified
     * class name.
     *
     * @param p_className The class of {@link Skin} to be returned
     * @return reference to {@link Skin} instance.
     * @throws JspTagException if specified class can not be loaded or
     *                         it does not implement {@link Skin} interface.
     */
    Skin getSkin(String p_className) throws JspTagException;

    /**
     * @return reference to default {@link Skin} instance.
     */
    Skin getDefaultSkin();

}