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/*
 * The contents of this file are subject to the terms
 * of the Common Development and Distribution License
 * (the "License").  You may not use this file except
 * in compliance with the License.
 *
 * You can obtain a copy of the license at
 * glassfish/bootstrap/legal/CDDLv1.0.txt or
 * https://glassfish.dev.java.net/public/CDDLv1.0.html.
 * See the License for the specific language governing
 * permissions and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL
 * HEADER in each file and include the License file at
 * glassfish/bootstrap/legal/CDDLv1.0.txt.  If applicable,
 * add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your
 * own identifying information: Portions Copyright [yyyy]
 * [name of copyright owner]
 *
 * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
 *
 * Portions Copyright Apache Software Foundation.
 */ 

package org.apache.taglibs.standard.tei;

import javax.servlet.jsp.tagext.TagData;
import javax.servlet.jsp.tagext.TagExtraInfo;

/**
 * An implementation of TagExtraInfo that implements validation for
 * ForEachTag's attributes
 *
 * @author Shawn Bayern
 */
public class ForEachTEI extends TagExtraInfo {

    final private static String ITEMS = "items";
    final private static String BEGIN = "begin";
    final private static String END = "end";

    /*
     * Currently implements the following rules:
     * 
     * - If 'items' is not specified, 'begin' and 'end' must be
     */
    public boolean isValid(TagData us) {
        if (!Util.isSpecified(us, ITEMS))
            if (!Util.isSpecified(us, BEGIN) || !(Util.isSpecified(us, END)))
                return false;
        return true;
    }

}