GroupsLoopTag.java :  » Forum » yazd » com » Yasna » forum » tags » Java Open Source

/**
 * Copyright (C) 2001 Yasna.com. All rights reserved.
 *
 * ===================================================================
 * The Apache Software License, Version 1.1
 *
 * 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
 *        Yasna.com (http://www.yasna.com)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Yazd" and "Yasna.com" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please
 *    contact yazd@yasna.com.
 *
 * 5. Products derived from this software may not be called "Yazd",
 *    nor may "Yazd" appear in their name, without prior written
 *    permission of Yasna.com.
 *
 * 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 YASNA.COM 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
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 * 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 Yasna.com. For more information
 * on Yasna.com, please see <http://www.yasna.com>.
 */

package com.Yasna.forum.tags;

import javax.servlet.jsp.tagext.*;
import com.Yasna.forum.*;
import javax.servlet.jsp.*;
import java.util.*;

public class GroupsLoopTag extends TagSupport implements BooleanTag {

    private boolean hasGroups;
    private CategoriesLoopTag category;
    private Iterator forumGroupIterator;
    private ForumGroup forumGroup;
    private String name;
    private final String BLANK = "&nbsp;";
    private String id;

    public int doStartTag() throws JspException {
        category = getParentCategory();
        forumGroupIterator = category.getCategory().forumGroups();
        hasGroups = forumGroupIterator.hasNext();
        if (hasGroups) {
            forumGroup = (ForumGroup)forumGroupIterator.next();
            name = forumGroup.getName();
            pageContext.setAttribute(id, this, PageContext.PAGE_SCOPE);
        }
        return EVAL_BODY_INCLUDE;
    }

    public void setId(String id) {
        this.id = id;
    }

    public int doAfterBody() throws JspException {
        if (forumGroupIterator.hasNext()) {
            forumGroup = (ForumGroup)forumGroupIterator.next();;
            name = forumGroup.getName();
            return EVAL_BODY_AGAIN;
        } else {
            return SKIP_BODY;
        }
    }

    public int doEndTag() throws JspException {
        return EVAL_PAGE;
    }

    public boolean getValue() {
        return hasGroups;
    }

  private CategoriesLoopTag getParentCategory() {
    CategoriesLoopTag g = null;
    try {
      g = (CategoriesLoopTag)this.findAncestorWithClass(this,
        Class.forName("com.Yasna.forum.tags.CategoriesLoopTag"));
    } catch(Exception e) {
    }
    return g;
  }

  public ForumGroup getGroup() {
      return forumGroup;
  }

  public String getName() {
    String toReturn = name;
    name = BLANK;
    return toReturn;
  }
}