/*
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 1999 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. 
 *
 * 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 acknowlegement:  
 *       "This product includes software developed by the 
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
 *    Foundation" must not be used to endorse or promote products derived
 *    from this software without prior written permission. For written 
 *    permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache"
 *    nor may "Apache" appear in their names without prior written
 *    permission of the Apache Group.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * 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/>.
 *
 */ 

package javax.servlet.jsp.jstl.core;

import javax.servlet.jsp.tagext.Tag;

/**
 * <p>JSTL 1.0 は、LoopTagインタフェースを実装することによって、
 * カスタム反復タグを作ることを開発者ができるようにしています。
 * (LoopTagインタフェースと、JSP1.2で定義されている
 * javax.servlet.jsp.tagext.IterationTag とを混乱しないようにして下さい)。
 * LoopTag は反復タグがサブタグを理解するための、また、
 * カスタムサブタグと型に関して安全なやりとりをするためのメカニズムを提供します。
 * 
 * <p>大抵の場合、このインタフェースを自分で実装する必要はありません。
 * 基底となるサポートクラス(LoopTagSupport)が実装を簡単にするために提供されているからです。
 *
 * @author Shawn Bayern
 */

public interface LoopTag extends Tag {

    /**
     * 反復において現在のアイテムを取り出します．等冪な振る舞い;
     * getCurrent()を繰り返し呼ぶことは、反復が進んでいない限り、同じObjectを返します．
     * (明確に言えば，getCurrent()を呼ぶことは、反復を進め<b>ません</b>．)
     *
     * @return 現在のアイテム（オブジェクト型）
     */
    public Object getCurrent();

    /**
     * 反復における現在の回に関する情報を提供するための
     * '状態' オブジェクトを取り出します。
     *
     * @return 現在のLoopTagのLoopTagStatus
     */
    public LoopTagStatus getLoopStatus();
}